Roth IRA Calculator

The Roth IRA Calculator estimates how an existing Roth IRA balance and future annual contributions could grow by retirement. It also compares the modeled Roth IRA value with a taxable account using the same investment return and an estimated marginal tax drag, so you can see the potential difference in long-term accumulation.

Modify the values and click the Calculate button to use
Make contributions?
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Result
Roth IRA at retirement:$0.00
Taxable account:$0.00
Total principal:$0.00
Roth growth:$0.00
Taxable growth:$0.00
Estimated Roth advantage:$0.00
The taxable comparison uses the entered marginal tax rate as a simplified annual tax drag on investment growth. It is a planning model, not a complete tax-return calculation.
Balance Accumulation Graph
Roth IRATaxable accountPrincipal
Retirement Balance Comparison
Roth IRATaxable account

Annual Schedule

AgePrincipalRoth IRATaxable account
StartEndStartEndStartEnd
Enter values and select Calculate to update the retirement projection.

Roth IRA Calculator: Estimate Tax-Free Retirement Growth

A Roth IRA can be an important part of a long-term retirement strategy because eligible qualified distributions can be received tax-free. The Roth IRA Calculator on Dxcalculator.com is designed to turn that general idea into a practical projection. Enter a current account balance, planned annual contribution, expected investment return, current age, retirement age and a marginal tax rate. The calculator then models how the money could grow and places the Roth IRA beside a simplified taxable-account comparison. The purpose is not to predict the market or prepare a tax return. Instead, it gives you a clear numerical scenario that can be changed repeatedly as you consider different savings rates, retirement dates and investment assumptions.

The calculator is especially useful because retirement outcomes are driven by several variables at once. A person who starts with a modest balance but contributes consistently for many years may accumulate substantially more than someone who starts later with a larger amount but has fewer years to compound. The expected return also matters, as does the length of the investment period. By showing the projected Roth IRA value, taxable-account value, principal contributed and annual schedule together, the tool makes those relationships easier to understand. The graphs provide a visual view of the same calculation so that a long time horizon does not have to be understood from numbers alone.

What Is a Roth IRA?

A Roth IRA is an individual retirement arrangement funded with money that has already been subjected to income tax. Unlike a traditional IRA, contributions to a Roth IRA are generally not deducted from current taxable income. The trade-off is that qualified withdrawals can receive favorable tax treatment later. In a properly qualified distribution, the investment growth can be withdrawn without federal income tax. That potential tax-free retirement income is one of the main reasons people compare Roth accounts with taxable investing and tax-deferred retirement accounts.

The account itself is not the investment. A Roth IRA is a tax-advantaged account that can hold investments offered by the financial institution where the account is established. Depending on the provider, the account may offer choices such as mutual funds, exchange-traded funds, stocks, bonds, cash equivalents or other permitted investments. The investment selection determines the actual return. The calculator therefore asks you to enter an expected annual rate rather than pretending that every Roth IRA earns the same return.

Another important point is that a Roth IRA has eligibility and contribution rules. The calculator intentionally focuses on the growth question and does not attempt to verify income eligibility, earned-income requirements, filing status, excess contributions, conversion history or every IRS rule. The figures supplied for this page include 2026 planning assumptions, but tax rules and contribution limits can change. Always check the rules applicable to the tax year and your personal situation before making a contribution.

How the Roth IRA Calculator Works

The calculation starts with the current Roth IRA balance. That amount is allowed to compound for the number of years between the current age and retirement age. If contributions are enabled, the annual contribution is added once per year in the model. This means the calculator is using a consistent annual-contribution assumption rather than attempting to simulate every paycheck or every market day. The result is therefore easy to reproduce and compare across scenarios.

The Roth portion of the model uses the expected investment return without subtracting the marginal tax rate from the account's growth. In the simplified model, the future value is the growth of the existing balance plus the future value of the annual contributions. The taxable comparison starts with the same current balance and contribution stream, but applies a simplified tax drag to the expected return using the marginal tax rate you enter. This is why the taxable-account result can be lower even though both scenarios begin with the same money and use the same headline investment return.

For example, using a current balance of $30,000, annual contributions of $7,500, an expected return of 6%, a current age of 30 and a retirement age of 65 produces a 35-year projection. With contributions enabled, the modeled principal is $292,500. The Roth balance compounds at the full assumed rate, while the taxable comparison uses a simplified after-tax growth rate. Change any of those assumptions and the result, graph and schedule will update together.

Roth IRA Future Value Formula

For a simplified annual contribution model, the future value of the Roth account can be represented as the future value of the existing balance plus the future value of annual contributions. If P is the current balance, C is the annual contribution, r is the expected annual return as a decimal, and n is the number of years, the model can be expressed as:

Roth future value = P × (1 + r)n + C × [((1 + r)n − 1) / r]

When the expected return is zero, the contribution-growth portion is handled separately so the formula does not divide by zero. In that case, the future value is simply the starting balance plus the total contributions. The calculator handles this automatically.

This formula assumes contributions are made at the end of each modeled year. Real investors may contribute monthly, biweekly, or on another schedule. Because investment returns also vary over time, the result is a projection rather than a promise of what an account will actually be worth.

Why Time Is So Important in Roth IRA Planning

Time is one of the most powerful variables in a retirement projection. When investment gains remain invested, later gains can build on earlier gains. A longer period therefore gives the assumed return more opportunities to affect the account. The effect is particularly noticeable when contributions are made consistently over decades. The annual schedule shows this progression from the current age through the modeled retirement age.

Starting early can also reduce the amount of pressure placed on each future year of saving. Someone who has several decades until retirement has more time for contributions and investment growth to work together. Someone starting much closer to retirement may need a larger annual contribution to target a similar ending value, and there is less time available for investment growth to accumulate.

The calculator lets you explore this relationship by changing the current age. Try the same starting balance and contribution at ages 25, 35, 45 and 55. The ending values can be dramatically different even though the contribution amount and expected return are unchanged. That difference is a mathematical illustration of compounding and time, not a guarantee that any particular investment will produce the assumed return.

Current Balance and Existing Roth IRA Savings

The current balance is the amount already available in the modeled Roth IRA at the starting age. This input matters because an existing balance has more time to compound than a contribution that is added later. The calculator therefore treats the current balance separately from future contributions in the annual schedule.

If your Roth IRA currently contains $30,000 and you plan to contribute $7,500 each year, the starting $30,000 participates in growth throughout the entire modeled period. Each annual contribution participates for a different amount of time. A contribution made near retirement has much less time to compound than the initial balance. This is why simply multiplying the annual contribution by the number of years does not give you the retirement balance.

Annual Roth IRA Contributions

Annual contributions are another major driver of retirement growth. Consistency can matter as much as the amount of any single deposit because every contribution becomes another amount that can potentially compound. The calculator includes a Yes/No contribution choice so you can compare a continuing-contribution scenario with a scenario in which no new contributions are modeled.

The contribution field is a planning input rather than an eligibility checker. You should not assume that any amount can be contributed to a Roth IRA simply because the calculator accepts it. Applicable contribution limits, income limits, earned-income requirements and other rules depend on the tax year and the taxpayer's circumstances. The tool is intended to show what a selected contribution amount would do mathematically if it were permitted.

For the 2026 assumptions supplied for this page, the annual Roth IRA contribution limit is described as $7,500 for individuals below age 50 and $8,600 for individuals age 50 or older. These values are included as planning context rather than as a live eligibility determination. Tax rules can change, so verify the applicable limit before contributing.

Expected Rate of Return and Roth IRA Projections

The expected rate of return is an assumption, not a forecast. The calculator uses the percentage you enter consistently for every modeled year. Real investment returns can be positive or negative, can vary widely from year to year and can differ substantially from a long-term average. A 6% assumption therefore does not mean the account will earn exactly 6% every year.

It is often useful to run several return scenarios rather than relying on one number. For example, you could compare a conservative assumption with a middle scenario and a higher-growth scenario. The purpose is to understand how sensitive the projected retirement value is to investment performance. The result should be viewed as a range-planning exercise rather than a promised account value.

Fees also matter in real investing. If an investment has management fees, fund expenses, advisory charges or other costs, the return experienced by the account may be lower than the gross market return you have assumed. To model a more conservative outcome, some users choose an expected return that already reflects expected investment costs.

Roth IRA Compared With a Taxable Investment Account

The comparison shown by this tool is intended to answer a common planning question: what could happen if the same money were invested in a Roth IRA instead of a taxable account? The calculator holds the starting balance, annual contribution and headline investment return constant. The difference comes from the simplified treatment of taxes on the taxable account's investment growth.

In the taxable scenario, the calculator applies the entered marginal tax rate as an annual tax drag to the expected return. For example, with a 6% expected return and a 25% marginal tax assumption, the simplified after-tax growth rate is 4.5%. This is deliberately straightforward so the comparison is easy to understand. Actual taxable investment taxation can be more complicated because dividends, interest, realized capital gains, unrealized gains, tax-loss harvesting, holding periods, state taxes and the type of investment can all affect the outcome.

Therefore, the taxable account result should not be interpreted as an exact after-tax brokerage-account projection. It is a consistent comparison benchmark. Its main purpose is to show why tax treatment can become increasingly important over long periods. The longer the money compounds, the larger the mathematical effect of differences in the assumed growth rate can become.

What the Principal Total Means

The principal total is the starting balance plus the future contributions included in the model. It is useful to compare this figure with the ending Roth IRA balance because the difference represents modeled investment growth. For the example of a $30,000 starting balance and $7,500 annual contributions over 35 years, the principal total is $292,500 when contributions are made every year.

The principal total should not be confused with the Roth IRA contribution limit for one tax year. It is a cumulative planning number covering the entire modeled period. A long-term projection can therefore show a principal total that is much larger than one year's annual contribution limit because it represents contributions made across many different tax years.

Roth IRA Growth Versus Taxable Growth

The accumulation graph makes the comparison easier to see. The principal line shows how much money has been put into the plan, while the Roth IRA and taxable-account lines show the modeled balances. At the beginning, the three values can be close. As time passes, the investment-growth component becomes more important. Under the example assumptions, the Roth IRA line can pull progressively farther away from the taxable-account line because the model applies the tax drag to the taxable return.

The second graph provides another way to compare the two retirement values at the end of the selected period. It is useful when you want a quick visual answer instead of reading the full schedule. Both graphs are recalculated whenever you press Calculate, so changing the contribution amount, expected return, age or marginal tax rate immediately changes the visualization.

How the Annual Schedule Helps

A retirement projection can feel abstract when you see only one ending number. The annual schedule breaks that projection into individual ages. Each row shows the starting and ending principal, Roth IRA balance and taxable-account balance for the modeled year. This makes it easier to see how the balances change over time.

The table also helps you identify where most of the ending value comes from. Early in the projection, contributions may represent a large part of the account balance. Later, investment growth can become the larger component. This is one reason retirement saving can look slow at first and accelerate later under a positive compound-return assumption.

If you change the retirement age, the number of schedule rows changes as well. If you turn contributions off, the principal line remains at the existing balance while the investment balances continue to compound. If you change the expected return or tax rate, every subsequent row is recalculated.

Roth IRA Tax Treatment in Retirement

One of the main attractions of a Roth IRA is the possibility of tax-free qualified distributions. Contributions are made with after-tax money, so the account does not generally provide the same upfront deduction associated with some traditional retirement contributions. In exchange, qualifying withdrawals can provide tax-free retirement income.

Whether a particular withdrawal is qualified depends on applicable rules and the taxpayer's circumstances. Age, the five-year requirement and the reason for the distribution can matter. The calculator does not track individual contribution basis, conversion basis, separate five-year conversion clocks or withdrawal ordering rules. It simply models the growth of the account as a long-term retirement asset.

Because of these distinctions, the phrase “tax-free retirement growth” should be understood as a description of the potential tax treatment of qualified Roth IRA distributions, not as a statement that every withdrawal from every Roth IRA is automatically tax-free.

Roth IRA Contributions and Withdrawals

Direct Roth IRA contributions and investment earnings do not always have identical withdrawal treatment. Contributions are generally treated differently from earnings for distribution purposes. Earnings may face tax and penalty consequences when withdrawn in circumstances that do not meet the requirements for a qualified distribution. This is an important distinction when using a Roth IRA as part of a long-term plan.

The fact that contributions can have more flexible withdrawal treatment does not mean a Roth IRA should automatically be treated as an emergency savings account. Removing money can reduce the amount available to compound for retirement, and once an amount has been contributed and withdrawn, the ability to replace it can depend on applicable contribution rules and timing.

Roth IRA Income Limits and Eligibility

Direct Roth IRA contributions are subject to income-related rules. The income thresholds supplied for the 2026 planning information on this page are $168,000 for single or head-of-household filers and $252,000 for married couples filing jointly. Those thresholds are described as adjusted gross income figures in the source material provided for this calculator. Actual eligibility can depend on filing status, modified adjusted gross income calculations and other details, so a simple calculator should not be treated as an eligibility determination.

Earned income is also relevant to IRA contributions. The calculator does not ask for wages, self-employment income or filing status, so it cannot determine whether the contribution amount entered is allowed. It is deliberately a growth calculator rather than a contribution-eligibility tool.

If your income is above the direct-contribution range, different strategies may exist, including a Roth conversion, but those strategies can have tax consequences. A conversion is not the same thing as an ordinary annual contribution, and the calculator does not model conversion taxes.

Roth IRA Versus Traditional IRA

A Roth IRA and a traditional IRA both provide retirement-focused tax advantages, but the timing of taxation is different. Roth contributions generally use after-tax money and can potentially provide tax-free qualified distributions. Traditional IRA contributions may be deductible depending on circumstances, while withdrawals are generally taxable under the applicable rules.

The better account depends on factors such as current and expected future tax rates, eligibility, income, retirement timing, other retirement assets and personal cash-flow needs. Someone who expects a higher tax rate later may value tax-free Roth withdrawals, while someone who benefits substantially from a current deduction may prefer a traditional arrangement. There is no single answer that fits every household.

For another retirement comparison, use the IRA Calculator on Dxcalculator.com. You can also combine the Roth projection with the 401K Calculator to examine employer-sponsored retirement savings separately.

Roth IRA Versus a 401(k)

A Roth IRA and a 401(k) are different account structures. A workplace 401(k) may offer employer matching, payroll contributions and higher annual contribution limits, while a Roth IRA can offer a different investment menu and individual ownership outside an employer plan. Some workplace plans also offer Roth 401(k) contributions, which have their own rules.

Because the accounts can serve different purposes, many savers use more than one retirement vehicle. The important point is to understand the contribution rules, fees, investment choices and tax treatment for each account rather than assuming that one account is always superior.

The Retirement Calculator can be useful after this Roth projection because it broadens the question from account value to retirement readiness. A large projected balance is only one part of a retirement plan; spending needs, inflation, Social Security, pensions, taxes and longevity also affect whether savings are sufficient.

Roth IRA Conversions

A Roth conversion moves money from a traditional IRA or another eligible retirement account into a Roth IRA. A conversion is different from an annual Roth IRA contribution. A conversion can create taxable income depending on the tax basis and circumstances, and the amount converted can affect the taxpayer's tax bracket.

People sometimes consider conversions when they expect their future tax rate to be higher, when they want to build tax-diversified retirement assets, or when they want to reduce future required distributions from traditional retirement accounts. The decision can be complicated, particularly for large balances. Taxes may need to be paid from money outside the retirement account to avoid reducing the amount that continues to compound.

This Roth IRA Calculator does not estimate conversion taxes. It assumes the current balance entered is already inside the modeled Roth IRA and therefore does not attempt to determine how the balance got there.

Required Minimum Distributions and Roth IRAs

Roth IRAs have historically been attractive for retirement planning partly because the original account owner does not face the same lifetime required minimum distribution structure associated with traditional IRAs. This can give a Roth IRA more flexibility for people who do not need to draw down the account at a particular age.

That flexibility can also make Roth assets useful for estate planning and tax diversification. However, inherited Roth IRAs have their own distribution rules, and beneficiaries should not assume that every inherited account can remain untouched indefinitely. The calculator is not designed to model inherited-account distribution schedules.

Benefits of Roth IRA Saving

  • Potential tax-free qualified retirement income: Qualified distributions can provide a source of retirement cash flow that is not included in federal taxable income.
  • Long-term compounding: Investment gains can remain inside the account and continue compounding without the annual taxation assumed in a taxable account.
  • Tax diversification: Roth assets can complement taxable and tax-deferred retirement accounts.
  • No upfront deduction requirement: A Roth strategy does not depend on receiving a current-year deduction from the contribution itself.
  • Flexible planning: Roth assets can be considered alongside traditional IRAs, 401(k)s, taxable investments and other retirement resources.
  • Potential estate-planning value: Tax characteristics can make Roth assets useful when planning how retirement assets may pass to beneficiaries.

Potential Drawbacks of Roth IRA Saving

  • No general upfront deduction: Roth contributions are generally made with after-tax dollars.
  • Contribution limits: Annual IRA contribution limits restrict how much can be added directly each year.
  • Income restrictions: Direct Roth IRA eligibility can phase out or become unavailable at higher income levels under applicable rules.
  • Investment risk: A Roth IRA can hold investments whose values decline, and tax advantages do not eliminate market risk.
  • Long-term opportunity cost: Money removed from the account may no longer have the same opportunity to compound for retirement.
  • Complex withdrawal rules: Qualified and non-qualified distributions can receive different tax treatment.

How Inflation Affects a Roth IRA Projection

The calculator uses nominal dollars. If the account grows to a large future value, that number will not necessarily have the same purchasing power as the same number today. Inflation reduces the amount of goods and services that a fixed dollar amount can buy over time.

For this reason, it is useful to run the Roth projection alongside an inflation-aware retirement analysis. The Retirement Calculator can help you think about retirement needs more broadly, while the Roth tool focuses on the accumulation of a particular account.

A common planning mistake is to compare a future account balance directly with today's spending without considering inflation. A future $1,000,000 may sound large, but its purchasing power depends on how many years pass and what inflation looks like during those years. The Roth Calculator intentionally keeps the model simple so the effect of contribution rate, return and time can be seen clearly.

How to Use the Roth IRA Calculator

  1. Enter the current balance of the Roth IRA you want to model.
  2. Enter the planned annual contribution.
  3. Select Yes if you expect to keep making those annual contributions, or No if you want to model no future contributions.
  4. Enter an expected rate of return as a percentage.
  5. Enter your current age.
  6. Enter the age at which you want the projection to stop under retirement age.
  7. Enter a marginal tax rate for the simplified taxable-account comparison.
  8. Click Calculate to refresh the results, graphs and annual schedule.

After the first calculation, change one input at a time. This makes it easier to understand which assumption is responsible for a change in the result. For example, keep the contribution constant and change only the retirement age. Then restore the retirement age and change only the expected return. This approach creates a simple sensitivity analysis.

Example Roth IRA Scenario

Consider a saver who is age 30 with $30,000 already in a Roth IRA. The saver plans to contribute $7,500 each year and assumes a 6% annual investment return. If retirement is modeled at age 65, there are 35 years of growth. With contributions enabled, the cumulative modeled principal becomes $292,500.

The Roth projection in this example grows the starting balance and annual contributions at the full 6% assumed return. The taxable comparison applies a 25% marginal tax assumption to the return, creating a simplified 4.5% after-tax growth rate. Under those exact assumptions, the Roth value is approximately $1.066 million while the taxable comparison is approximately $751,245. The difference is not a forecast; it is the mathematical result of the assumptions entered into the model.

This example demonstrates why the time horizon matters. The $292,500 principal is substantially smaller than the modeled Roth ending balance because a large part of the ending value comes from investment growth. It also demonstrates why the tax comparison becomes more visible over long periods.

Why the Calculator Uses a Simplified Taxable Comparison

Taxable investing is not governed by one universal tax rate applied to every dollar of return every year. Interest income, ordinary dividends, qualified dividends, short-term capital gains and long-term capital gains can be treated differently. Taxes can also be affected by realized versus unrealized gains and by the investor's overall tax situation.

Building a complete taxable-account tax engine would require many additional inputs and could make the calculator difficult to use. Instead, this tool uses one marginal tax rate as a simple annual tax drag. That choice makes the comparison transparent. You can see exactly how changing the marginal tax rate changes the taxable-account projection.

Because the comparison is simplified, it should not be used to decide whether a specific investment account will produce a specific after-tax return. It is best used to illustrate the potential long-term value of tax-advantaged compounding.

Choosing an Expected Return for Planning

There is no universally correct return assumption. A portfolio invested heavily in stocks may have a different expected return and volatility profile from a conservative portfolio containing more bonds and cash. A diversified portfolio can still experience substantial declines. The calculator therefore works best when you test several reasonable assumptions instead of entering an aggressive number simply to obtain a larger retirement balance.

One practical approach is to run a conservative case, a middle case and an optimistic case. Compare the results and ask whether your retirement plan remains workable under the lower-return scenario. This can be more useful than planning around a single best-case number.

Roth IRA and Investment Fees

Investment expenses can reduce the amount of money that compounds over time. A fund expense ratio, advisory fee or account fee may appear small when viewed as a percentage, but over several decades even small annual costs can have a meaningful effect on the ending balance. The calculator does not have a separate fee input, so the expected return should be interpreted according to how you intend to account for investment costs.

If your expected market return is 7% but you expect 1% of annual costs, a conservative planning approach may be to use an expected net return closer to 6%. The exact treatment depends on the fee structure and investment. This is an illustration rather than a rule for every account.

Roth IRA and Employer Retirement Plans

A Roth IRA does not have to replace an employer retirement plan. In many households, retirement savings are spread across several account types. An employer plan may provide a matching contribution, while an IRA may provide different investment choices or tax characteristics. A taxable account can provide additional flexibility for goals before retirement.

Use the 401K Calculator to model a workplace retirement plan separately. Then compare the projected account values with this Roth IRA calculation. Looking at each account individually can help you understand the contribution and growth assumptions before you combine them into a broader retirement plan.

Roth IRA as Part of a Diversified Retirement Strategy

Retirement planning rarely depends on one account. A household may have Social Security, a pension, a 401(k), traditional IRA assets, Roth assets, taxable investments, cash savings and other resources. The tax treatment of each source can be different. Roth assets may therefore provide useful flexibility when deciding which accounts to draw from in retirement.

Tax diversification means having assets with different tax characteristics. It does not guarantee a lower tax bill, but it can give a retiree more choices. For example, a retiree may be able to use taxable funds for one goal, tax-deferred funds for another and Roth funds for a qualified tax-free distribution. The optimal withdrawal sequence depends on the person's circumstances and applicable rules.

Roth IRA and Emergency Savings

Although Roth contribution withdrawals can have more favorable treatment than many retirement-account withdrawals, an IRA is still primarily a retirement account. Emergency savings are generally better planned separately so that unexpected expenses do not force a long-term retirement account to be used at an inconvenient time.

Keeping an adequate cash reserve can help protect a retirement portfolio from being sold during a market decline. It can also make it easier to continue regular retirement contributions when short-term expenses arise.

Roth IRA and Retirement Age

The retirement age input controls the length of the projection. Raising retirement age gives the existing balance and contributions more time to grow, while lowering it shortens the accumulation period. This can be one of the most powerful scenario tests you can perform with the calculator.

Retirement age should not be selected solely to maximize the calculator's ending balance. Health, employment opportunities, desired lifestyle, family responsibilities, Social Security timing, pensions and other income sources all matter. The calculator answers a mathematical question: what happens to the modeled Roth balance when the time horizon changes?

Common Roth IRA Planning Mistakes

  • Assuming a fixed return: Investment markets do not deliver the same return every year.
  • Ignoring taxes outside the Roth: A taxable account may have ongoing tax costs that reduce compounding.
  • Using an unrealistic contribution amount: Contributions must follow the rules applicable to the taxpayer and tax year.
  • Ignoring fees: Investment and account costs can reduce the net return.
  • Focusing only on the ending balance: The annual schedule can reveal how much of the balance comes from contributions versus growth.
  • Forgetting inflation: A future dollar is not necessarily equal to today's dollar in purchasing power.
  • Assuming all Roth withdrawals are automatically tax-free: Qualified-distribution requirements matter.
  • Using one scenario: Testing multiple returns and retirement ages produces a more useful planning range.

Frequently Asked Questions About the Roth IRA Calculator

What does a Roth IRA Calculator tell me?

It estimates how a current Roth IRA balance and future annual contributions could grow to a selected retirement age under a constant expected return. This version also compares the modeled Roth value with a simplified taxable-account value.

Does the calculator guarantee my retirement balance?

No. The result is a mathematical projection based on the assumptions you enter. Investment returns vary, contributions can change, fees can apply and tax rules can change.

Does the calculator check whether I am eligible for a Roth IRA?

No. It does not collect filing status, earned income, modified adjusted gross income or other eligibility information. It is a growth and comparison tool.

Does the taxable account calculation represent my actual brokerage taxes?

No. The taxable comparison applies the marginal tax rate as a simplified annual tax drag. Actual taxable-account taxation can depend on the type and timing of income and gains.

Why is the Roth balance often higher than the taxable balance?

Under the model, both accounts receive the same starting balance, contribution and headline return, but the taxable account's growth is reduced by the entered marginal tax rate. Over a long period, that difference can compound.

What happens if I select No for contributions?

The annual contribution is ignored for the projection. The current balance continues to compound through the selected retirement age, allowing you to model a “no new contributions” scenario.

What happens if I set the expected return to 0%?

The calculator treats the return as zero and adds the modeled contributions to the starting balance. This avoids a division-by-zero problem in the contribution-growth formula.

Can I use the calculator for monthly contributions?

The main model uses an annual contribution for simplicity. If your real contributions occur monthly, the annual input can be used as an approximate annual total, but the exact timing of monthly deposits may produce a somewhat different result.

Does the calculator account for Roth IRA conversion taxes?

No. The current balance is assumed to already be in the Roth IRA. Conversion taxes, basis and conversion-specific five-year periods are outside the scope of this growth model.

Does a Roth IRA have required minimum distributions?

The original owner's Roth IRA has different distribution rules from a traditional IRA and does not use the same lifetime RMD structure. Beneficiary rules can be different, so inherited Roth accounts should be evaluated separately.

How can I compare this with a traditional IRA?

Use the IRA Calculator to model a traditional IRA separately. Comparing the two tools can help you examine different tax-timing assumptions.

Other Retirement Tools on Dxcalculator.com

Retirement planning works best when several related questions are considered together. After using this Roth IRA Calculator, you can visit the IRA Calculator for traditional IRA growth, the 401K Calculator for workplace retirement contributions, the Retirement Calculator for broader retirement planning, or the Investment Calculator for general investment-growth scenarios. Using consistent assumptions across tools can make comparisons easier.

Important Limitations and Disclaimer

This Roth IRA Calculator is provided for general education and financial planning estimates. It is not tax, legal, investment, accounting or retirement advice. The calculation does not reproduce the complete Internal Revenue Code, IRS instructions, account-provider rules or every individual's financial circumstances.

The calculator assumes a constant expected annual return, a consistent annual contribution when contributions are enabled, and a simplified annual tax drag for the taxable comparison. Actual investments may experience losses and gains, actual contribution timing may differ, and actual taxable-account results can vary because of dividends, interest, capital gains, fees, state taxes and other factors.

The 2026 contribution and income figures described on this page are included as planning information based on the source material supplied for this calculator. Tax limits and eligibility rules can change. Verify current requirements with authoritative tax guidance before making a contribution or conversion.

Use the results as scenario estimates rather than promises. For major retirement decisions, consider your full financial picture and consult an appropriately qualified professional when necessary.