Roth IRA Calculator (USA)

Use GlobalCalqulate’s free Roth IRA Calculator (USA, 2026) to estimate Roth IRA growth from yearly contributions, expected return, and time horizon. Calculate future retirement value, total contributions vs earnings, and test Roth conversion scenarios to understand potential tax impact and long-term benefits. Great for retirement planning with 401(k), Traditional IRA, and Social Security income.

Last revised 24 September 2026

By Team GlobalCalqulate · About our editorial standards

Personal Information

Current Age

Retirement Age

Tax Filing Status

Modified Adjusted Gross Income

Financial Disclaimer: This result is an educational estimate produced by applying a standard formula to the figures you entered. It is not an offer, a quotation, or financial advice: real costs and returns depend on a provider's pricing, fees and underwriting, and on circumstances this calculator does not collect. Confirm the figures with the provider or a qualified adviser before acting on them. Full disclaimer.

Calculation type: Projection from your assumptions.

Your entries stay on this device. This calculator runs entirely in your browser — the figures you type are not sent to us or to anyone else. The page itself uses cookies for analytics and advertising, described in the privacy policy.

Formula & methodology

Limitations

Assumes a constant annual return. Real returns vary year to year, and sequence matters near retirement.
Contributions are capped at what the IRS lets you put in this year (the limit, the income phase-out and your earned income). The limit is indexed and will rise, so holding it flat is conservative over a long horizon.
Assumes you remain eligible to contribute for the whole period. Income above the phase-out ends direct contributions; the calculator does not model a backdoor Roth.
A Roth conversion is treated as one move made now, with the tax paid from money outside the IRA. It does not model your tax brackets, the pro-rata rule for mixed pre-tax and after-tax IRAs, or the 5-year rule that applies to each conversion.
The five-year rule and the age condition for tax-free qualified withdrawals are not modelled.
Fees and fund expense ratios are not deducted.
Assumes current Roth tax treatment continues unchanged over decades of tax law.
A projection of one scenario, not advice on Roth versus traditional.

This page is educational. It projects a future value from assumptions you choose, and a projection is not a forecast: real returns vary year to year, and the rules, limits and rates used here can change before the period modelled ends. Treat the output as one scenario among many, not a prediction of what you will have.

Financial Disclaimer: This calculator projects Roth IRA growth using a fixed assumed return rate and current contribution limits; it does not account for income-based contribution phase-outs, market volatility, investment fees, or future changes to tax law. Actual results will vary based on market performance and your eligibility. This tool is for planning purposes only and is not financial or tax advice — consult a qualified financial advisor or tax professional. Full disclaimer.

Methodology, Assumptions & Disclaimers (US Roth IRA Calculator)

This US Roth IRA calculator is designed as a planning tool to help you understand how after-tax Roth contributions and investment growth might translate into a future retirement balance. It focuses on long-term compounding and simple Roth conversion tax estimates rather than detailed US tax filing or investment modelling.

The growth engine applies standard time-value-of-money formulas. Your existing Roth IRA balance is modelled as a lump sum that compounds at a constant average annual return from your current age to your retirement age. New contributions are treated as end-of-year deposits in an ordinary annuity. Both parts are combined to estimate your projected Roth IRA value, alongside a breakdown of total contributions versus investment earnings.

Inflation is handled as a separate long-run planning assumption. The calculator discounts your projected retirement-age balance back into today's US dollars using the inflation rate you enter. This is intended to give a sense of purchasing power, not to predict actual future price levels or Federal Reserve policy. Markets are volatile, and real returns will vary from year to year.

Any Roth conversion estimate is simplified. The tool multiplies the conversion amount you enter by a single combined marginal tax rate that you choose to approximate an upfront tax bill. It does not model detailed federal tax brackets, deductions, credits, alternative minimum tax, or state-specific rules. Actual Roth conversion outcomes depend on your full US tax profile and current IRS regulations.

The calculator does not enforce IRS contribution limits, income phase-outs, 5-year holding rules, or age-based withdrawal rules. Those constraints are discussed in the educational content, and you should always cross-check contribution and conversion plans against current IRS guidance for Roth IRAs and related accounts.

Methodology and assumptions are informed by publicly available US retirement and tax resources, including IRS publications on IRAs, Roth IRAs, and conversions, as well as educational material from organisations such as the US Department of Labor and the Social Security Administration. However, this tool does not replace official documents, personalised advice, or plan-specific disclosures.

Last updated: October 1, 2026. This tool is for informational and educational purposes only and does not provide financial, tax, or investment advice. Using this calculator does not create a client–advisor relationship. Always review current IRS rules and consult a qualified tax or financial professional before making contribution, conversion, or withdrawal decisions.

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Understanding Roth IRAs

Roth IRA Fundamentals: Contributions, Earnings & Tax-Free Growth

A Roth IRA is a retirement account where you contribute after-tax dollars. All earnings and qualified distributions are tax-free. In 2026, contribution limits max at $7,500 (under 50) / $8,600 (50+, with the $1,100 catch-up). Key features: (1) Contributions are made post-tax (no deduction), (2) Earnings grow tax-free via compounding, (3) Qualified distributions (age 59.5+ and 5-year holding period) are tax-free, (4) Non-qualified distributions allow contribution withdrawal tax-free but earnings taxed + 10% penalty, (5) No Required Minimum Distributions (RMDs) during owner's lifetime. Example: $7,500 contribution at age 25 growing 8%/year to age 65 = $291,600 tax-free balance. Traditional IRA would owe ~20% tax on all gains = significant Roth advantage.

Traditional IRA vs Roth IRA: Tax Treatment & Strategic Differences

Traditional IRA: Contributions may be tax-deductible if you're not covered by workplace 401k or below income limits. Withdrawals in retirement are taxed as ordinary income. RMDs required at 73. Better when: (a) you want a tax deduction today, (b) you expect lower tax rates in retirement, (c) you have high income now. Roth IRA: No deduction today, but all growth and withdrawals tax-free (if qualified). No RMDs. Better when: (a) you expect higher tax rates later, (b) you want flexibility for early withdrawals, (c) you want to leave tax-free inheritance. Tax bracket analysis: 25% bracket today vs 24% expected in retirement = Roth. 24% bracket today vs 35% expected = Traditional better, then convert to Roth later if rates rise.

Roth Conversion Strategy: Converting Traditional IRA to Roth

A Roth conversion means rolling a Traditional IRA balance into a Roth IRA, paying ordinary income tax on the converted amount. Why convert? Lock in lower tax rates, eliminate future RMDs, create tax-free growth. Example: Traditional IRA worth $100K, convert in year earning $50K income (22% bracket) = $22K tax owed, then $100K grows tax-free. If tax rates rise to 35%, you've locked 22% rate. Backdoor Roth: High-earner (>$168K single, $252K married for 2026) not allowed direct Roth contribution can: (1) Contribute $7,500 to Traditional IRA, (2) Immediately convert to Roth, (3) Pay tax on gains only (usually minimal). Pro-rata rule complicates backdoors if you have existing Traditional IRA balance; consult tax pro. Mega backdoor Roth: Large conversions via after-tax 401k contributions if plan allows ($72,000 2026 combined employee+employer limit).

Contribution Limits, Income Phase-Out, & Roth Eligibility

Roth IRA contributions are limited by Modified Adjusted Gross Income (MAGI). 2026 limits: Single $153K MAGI (no contribution above $168K), Married Filing Jointly $242K (no contribution above $252K). Phase-out range = linear reduction. Example: Single filer, $155K MAGI. Limit $153K-168K range is $15K. Your MAGI exceeds by $2K. Contribution allowed = $7,500 × (1 - $2K/$15K) ≈ $6,500. High-earners phase-out completely above the top of the range. However, backdoor Roth bypasses income limits entirely (no MAGI restrictions; pro-rata rule applies instead). Catch-up contributions age 50+ = additional $1,100/year ($8,600 total). Strategic: Maximize Roth for high-growth years before phasing out.

The 5-Year Holding Period Rule & Qualified Distributions

Roth IRA distributions are only tax-free if you meet TWO criteria: (1) 5-year holding period (from first Roth contribution), (2) Age 59.5+ (or disability, death, first-time home buyer $10K exception). The 5-year clock is property-year based (calendar rather than anniversary). Example: Contribute January 2024, can take tax-free distribution January 2029 at any age (if 59.5+). Contributions always come out tax-free (ordered first). Earnings come out last. Non-qualified distribution withdraws earnings and triggers ordinary income tax + 10% penalty (with some exceptions: disability, medical, first-home $10K, education). Strategy: Roth conversions restart a new 5-year clock; track multiple conversion years separately.

No Required Minimum Distributions (RMD) Advantage

Unlike Traditional IRAs, Roth IRAs have NO Required Minimum Distributions (RMDs) during the original owner's lifetime. This is massive for tax planning and legacy wealth. At age 73, Traditional IRA owners must withdraw ~3-5% of account value and pay income tax. Roth owners can leave their account untouched, allowing unlimited compound growth. If you don't need withdrawals, Roth preserves principal entirely for beneficiaries (who inherit tax-free). This makes Roth ideal for high-net-worth retirees who don't need distributions and want tax-free legacy. Also allows higher-income years to skip Traditional IRA withdrawals, staying in lower tax bracket.

Help & FAQs

Frequently Asked Questions

Clear answers to common questions to help you use this calculator confidently.

How does this Roth IRA Calculator work?

Tap to view the answer

It projects growth of your after-tax Roth IRA contributions using your current balance, annual contribution, expected rate of return, and time horizon, applying standard compound-growth math. It doesn't enforce IRS contribution limits — verify your own eligibility.

What are the 2026 Roth IRA contribution limits and phase-outs?

Tap to view the answer

2026 limits: $7,500 (under 50) or $8,600 (50+, including the $1,100 catch-up). The income phase-out runs $153,000–$168,000 (single) and $242,000–$252,000 (married filing jointly). Above the top of the range, you can't contribute directly — a backdoor Roth conversion is the usual alternative.

Why is a Roth IRA different from a traditional IRA in this calculator?

Tap to view the answer

Roth contributions are after-tax, so this calculator projects tax-free growth with no future withdrawal tax modeled — unlike a traditional IRA, where withdrawals are taxed as income. That makes the Roth projection here directly comparable to your expected spendable retirement balance.

Does starting later significantly reduce my projected balance?

Tap to view the answer

Yes — fewer years means fewer years of compounding, which is usually the single biggest driver of the final projected value. Compare a few different starting ages to see how much starting early actually matters for your numbers.

Does this calculator account for state taxes?

Tap to view the answer

No — it focuses on the federal Roth IRA growth math. Roth IRA rules themselves are federal and apply the same regardless of state, but state tax treatment of Roth accounts isn't modeled.

Need more help? Contact support or email globalcalqulate@gmail.com

We typically reply within 24–48 hours.

Sources & references

Rev. Proc. 2025-32 §3.03 — Maximum Capital Gains Rate (Internal Revenue Bulletin 2025-45) — Internal Revenue Service
Rev. Proc. 2025-32 (PDF) — Internal Revenue Service
Topic no. 409, Capital gains and losses — Internal Revenue Service
Topic no. 559, Net investment income tax — Internal Revenue Service
CPI-U all items, US city average (series CUUR0000SA0) — time-series flat file — US Bureau of Labor Statistics
CPI Inflation Calculator (the same series, BLS's own tool) — US Bureau of Labor Statistics
Consumer Price Index home page and release schedule — US Bureau of Labor Statistics
Notice 2025-67 — 2026 amounts relating to retirement plans and IRAs — Internal Revenue Service
401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500 — Internal Revenue Service
COLA increases for dollar limitations on benefits and contributions — Internal Revenue Service

Calculation type: Projection from your assumptions. Uses 2025 rates and thresholds. Figures are taken from Internal Revenue Service and US Bureau of Labor Statistics — see sources below.

Reviewed by Team GlobalCalqulate — Verifies each figure against the issuing authority's published source · Checked 3 August 2026

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How to Use This Calculator

Set your US retirement horizon

Enter your current age and the age you plan to retire. This defines how many years your Roth IRA has to compound before you start drawing on it.

Add your current Roth IRA and contributions

Input your existing Roth IRA balance and the annual contribution you plan to make. For 2026, US IRS limits cap how much most savers can contribute each year, so keep your entry within current rules.

Choose expected return and inflation assumptions

Select a long-term average annual return and an inflation rate. Try a range of returns (for example, 5–8%) to see how sensitive your Roth IRA is to market performance.

Optionally test a Roth conversion

If you are considering moving money from a Traditional IRA into a Roth IRA, enter the conversion amount and your combined federal + state marginal tax rate to estimate an upfront tax bill.

Review projected Roth balance and key metrics

Click Calculate to see your projected Roth IRA balance at retirement, total contributions, investment earnings, inflation-adjusted value in today's dollars, and the extra nest egg created by ongoing contributions.

Understanding Your Results

Roth IRA value at retirement (nominal)
Shows the projected Roth IRA balance in future dollars at your chosen retirement age, assuming contributions and returns stay on track.
Total contributions versus investment earnings
Breaks out how much of your projected balance comes from the dollars you put in versus market growth, making the power of long-term compounding clear.
Inflation-adjusted Roth value
Estimates what your projected Roth IRA balance might be worth in today's US dollars after accounting for your inflation assumption.
Extra retirement dollars from ongoing contributions
Compares your projected Roth IRA balance with and without new contributions to show how much additional wealth steady investing can create.
Estimated Roth conversion tax (optional)
If you enter a conversion amount and marginal tax rate, the calculator estimates an upfront tax bill for moving pre-tax money into a Roth IRA, so you can weigh the trade-off.

Key Tips

✓
Start Roth IRA contributions as early as you reasonably can so compounding has more time to work before retirement.
✓
Test conservative, base-case, and optimistic return scenarios instead of relying on a single growth rate.
✓
Keep an eye on IRS Roth IRA contribution and income limits for the current tax year before finalising your plan.
✓
Consider how Roth IRA contributions fit alongside 401(k) employer match, high-interest debt payoff, and emergency savings.

US Roth IRA Growth, Conversion Strategy & Long-Term Planning

What is a Roth IRA and how does it work?

A Roth IRA is a US individual retirement arrangement funded with after-tax dollars. In exchange for giving up an upfront tax deduction, qualified withdrawals in retirement can be tax-free, including both your contributions and investment earnings. For many savers, this makes a Roth IRA a powerful way to lock in tax-free income later in life.

In the United States, Roth IRAs are governed by IRS rules on eligibility, income limits, and annual contribution caps. Most workers contribute each year out of take-home pay, invest in diversified portfolios such as index funds, and let compounding work over decades. Because contributions are made with money that has already been taxed, you do not get an immediate tax break the way you might with a Traditional IRA or pre-tax 401(k) contributions.

How this Roth IRA calculator works (formulas and assumptions)

Under the hood, this US Roth IRA calculator applies standard time-value-of-money formulas to estimate your future balance. It breaks the projection into two parts:

1) Growth of your existing Roth IRA balance, modelled as a lump sum compounding at a constant annual return from your current age to your retirement age. 2) Growth of your ongoing annual contributions, modelled as an ordinary annuity where end-of-year deposits earn the same expected annual return.

Mathematically, the calculator uses a future value of a lump sum formula for your current balance and a future value of an annuity formula for your contributions. It then adds both pieces together to estimate your projected Roth IRA value at retirement, along with the split between total contributions and investment earnings.

Worked example: US saver using a Roth IRA from age 30 to 65

Consider a 30-year-old US saver with no existing Roth IRA balance who plans to contribute $7,500 per year (the 2026 IRA contribution limit) until age 65. If they assume a 7% average annual return and 2.5% long-run inflation, the calculator will project the following:

- A nominal Roth IRA balance at age 65 based on 35 years of contributions and compounding. - The total amount they contributed out of pocket over those 35 years. - The investment earnings on top of their contributions. - An inflation-adjusted estimate of the age-65 balance in today's dollars, which is more useful for comparing against retirement income needs.

You can rerun this example with different contribution levels (for example, $4,000, $7,000, or higher catch-up amounts if eligible) or different return assumptions to see how sensitive your Roth outcome is to each decision.

Scenario comparison: contributing vs not contributing going forward

One key comparison this calculator highlights is the difference between continuing to contribute every year and simply leaving an existing Roth IRA balance to grow. By modelling a baseline path with no new contributions and a second path with your planned contributions, the tool shows how much additional retirement wealth steady investing may create.

This can be helpful when deciding whether to prioritise Roth IRA contributions versus focusing on other goals such as paying down high-interest debt, boosting an emergency fund, or maximising an employer 401(k) match. Seeing the dollar impact of contributions on your projected age-65 balance adds useful context when weighing trade-offs.

Roth conversion basics and how this tool estimates taxes

A Roth conversion occurs when you move money from a pre-tax account such as a Traditional IRA into a Roth IRA. In many US cases, the converted amount is added to your taxable income for the year, and you may owe federal and state income tax up front. The trade-off is that qualified future withdrawals from the Roth can be tax-free.

This calculator approximates the tax impact of a potential conversion by multiplying the amount you enter by your combined marginal tax rate, adds the converted amount to your Roth balance so its tax-free growth appears in the projection, and assumes the tax is paid from money outside the IRA. It does not model detailed US federal tax brackets, deductions, credits, or state-specific rules. Instead, it gives you a planning-level sense of how large an upfront tax bill you might face if you convert a given amount to a Roth IRA.

Common US Roth IRA mistakes this calculator can help you spot

When you experiment with realistic US scenarios, several common Roth IRA mistakes become obvious: waiting too long to start contributions, overestimating achievable investment returns, neglecting inflation when evaluating future balances, or planning a large Roth conversion without fully considering the tax bill.

By surfacing total contributions, total earnings, and inflation-adjusted values, this tool encourages you to think about both the nominal and real purchasing power of your Roth IRA at retirement. It also reinforces the idea that steady contributions often matter more than trying to chase the highest possible return.

When to use this US Roth IRA calculator alongside other tools

This Roth IRA calculator is most useful when you are assessing how a Roth fits into your broader US retirement plan. For example, you can use it when deciding between directing extra savings to a Roth IRA versus paying extra on a mortgage, or when you want to understand how Roth contributions interact with 401(k) savings and Social Security benefits.

For a more complete view, pair this tool with a US retirement calculator, 401(k) calculator, Traditional IRA calculator, and Social Security estimator so you can see how different accounts and income streams work together.

Formula & methodology

Limitations

Assumes a constant annual return. Real returns vary year to year, and sequence matters near retirement.
Contributions are capped at what the IRS lets you put in this year (the limit, the income phase-out and your earned income). The limit is indexed and will rise, so holding it flat is conservative over a long horizon.
Assumes you remain eligible to contribute for the whole period. Income above the phase-out ends direct contributions; the calculator does not model a backdoor Roth.
A Roth conversion is treated as one move made now, with the tax paid from money outside the IRA. It does not model your tax brackets, the pro-rata rule for mixed pre-tax and after-tax IRAs, or the 5-year rule that applies to each conversion.
The five-year rule and the age condition for tax-free qualified withdrawals are not modelled.
Fees and fund expense ratios are not deducted.
Assumes current Roth tax treatment continues unchanged over decades of tax law.
A projection of one scenario, not advice on Roth versus traditional.

US Roth IRA Growth, Conversion Strategy & Long-Term Planning

What is a Roth IRA and how does it work?

How this Roth IRA calculator works (formulas and assumptions)

Under the hood, this US Roth IRA calculator applies standard time-value-of-money formulas to estimate your future balance. It breaks the projection into two parts:

Calculator inputs

Personal Information

Roth IRA Contributions & Growth6 options

Roth Conversion Strategy2 options

Your results

Formula & methodology

Limitations

Methodology, Assumptions & Disclaimers (US Roth IRA Calculator)

Understanding Roth IRAs

Roth IRA Fundamentals: Contributions, Earnings & Tax-Free Growth

Traditional IRA vs Roth IRA: Tax Treatment & Strategic Differences

Roth Conversion Strategy: Converting Traditional IRA to Roth

Contribution Limits, Income Phase-Out, & Roth Eligibility

The 5-Year Holding Period Rule & Qualified Distributions

No Required Minimum Distributions (RMD) Advantage

How does this Roth IRA Calculator work?

What are the 2026 Roth IRA contribution limits and phase-outs?

Why is a Roth IRA different from a traditional IRA in this calculator?

Does starting later significantly reduce my projected balance?

Does this calculator account for state taxes?

Sources & references

Related calculators

More United States calculators

Popular US Calculators

Calculator inputs

Personal Information

Roth IRA Contributions & Growth6 options

Roth Conversion Strategy2 options

Your results

How to Use This Calculator

Example: Age 30, retiring at 65

Understanding Your Results

Key Tips

US Roth IRA Growth, Conversion Strategy & Long-Term Planning

What is a Roth IRA and how does it work?

How this Roth IRA calculator works (formulas and assumptions)

Worked example: US saver using a Roth IRA from age 30 to 65

Scenario comparison: contributing vs not contributing going forward

Roth conversion basics and how this tool estimates taxes

Common US Roth IRA mistakes this calculator can help you spot

When to use this US Roth IRA calculator alongside other tools

Formula & methodology

Limitations

How to Use This Calculator

Example: Age 30, retiring at 65

Understanding Your Results

Key Tips

US Roth IRA Growth, Conversion Strategy & Long-Term Planning

What is a Roth IRA and how does it work?

How this Roth IRA calculator works (formulas and assumptions)

Worked example: US saver using a Roth IRA from age 30 to 65

Scenario comparison: contributing vs not contributing going forward

Roth conversion basics and how this tool estimates taxes

Common US Roth IRA mistakes this calculator can help you spot

When to use this US Roth IRA calculator alongside other tools