Roth IRA Calculator
Enter your current age, retirement age, annual contribution, current balance, and expected return to see how your Roth IRA grows tax-free compared to a taxable account.
Reviewed by the ToolNestr Editorial Team — July 2026
How Roth IRA growth is calculated
The Roth IRA projection uses the future value formula: FV = PV × (1 + r)^n + PMT × ((1 + r)^n - 1) / r × (1 + r). For the taxable account, we reduce the annual return by the capital gains tax drag: Taxable FV = PV × (1 + r × (1 - t))^n + PMT × ((1 + r × (1 - t))^n - 1) / (r × (1 - t)), where t is the effective annual tax drag on investment returns.
The key advantage of a Roth IRA is that all growth is completely tax-free. In a taxable account, dividends and capital gains distributions create an annual tax drag that reduces your compounding. Over decades, this tax drag can reduce your ending balance by 20-40% compared to a tax-free Roth account. The younger you start, the more dramatic this advantage becomes, as tax-free compounding has more time to work its magic.
Worked example
Age 30, retire at 65, $7,000/year Roth contribution, $10,000 current balance, 7% return, 15% capital gains tax drag.
About Roth IRAs
The Roth IRA is one of the most powerful tools in personal finance because it offers tax-free growth — a rare combination in a world where most investment earnings are eventually taxed. Named after Senator William Roth, who sponsored the 1997 legislation creating it, the Roth IRA has become a cornerstone of retirement planning for millions of Americans. Unlike Traditional IRAs, Roth IRAs do not require minimum distributions during your lifetime, making them excellent vehicles for estate planning and passing wealth to heirs. Use the 401(k) Calculator to plan your employer-sponsored retirement savings alongside your Roth IRA.
How to use it
- Enter your current age and target retirement age.
- Enter your annual Roth IRA contribution and current balance.
- Set the expected annual return and see the projected tax-free amount vs a taxable account.
When to use this tool
Use this calculator when deciding whether to contribute to a Roth IRA or a taxable brokerage account, when planning your annual retirement contribution strategy, when evaluating the long-term impact of the Roth versus Traditional decision, or when setting up a backdoor Roth IRA.
Tips for Roth IRA success
- Max out your Roth IRA every year if you're eligible — the tax-free growth is invaluable.
- Use the backdoor Roth strategy if your income exceeds the direct contribution limit.
- Hold high-growth investments (stocks, ETFs) in your Roth IRA to maximize tax-free compounding.
Young Professional
Starting early with a Roth IRA gives you decades of tax-free growth. Your low current tax bracket makes Roth contributions especially advantageous now.
High-Income Earner
Use the backdoor Roth IRA strategy to contribute even if your income exceeds the direct contribution limits. Every dollar in a Roth grows tax-free forever.
Mid-Career Changer
If you're in a temporary low-income year (between jobs, sabbatical, starting a business), consider converting Traditional IRA funds to Roth at lower tax rates.
First-Time Home Buyer
Roth IRAs allow penalty-free withdrawals of up to $10,000 in earnings for a first-time home purchase. Your contributions can also be withdrawn anytime without tax or penalty.
How to use the Roth IRA calculator
Enter your age info
Input your current age and the age you plan to retire. The longer your time horizon, the more dramatic the tax-free compounding advantage becomes.
Set contributions and return
Enter your expected annual Roth IRA contribution and current balance. Use a conservative return estimate (5-7%) for realistic projections.
Compare the outcomes
See the Roth balance side-by-side with a taxable account. The difference shows the value of tax-free compounding over your investment horizon.
Tips for maximizing your Roth IRA
Start early and contribute consistently
The biggest advantage of a Roth IRA is the number of years your money grows tax-free. A $7,000 annual contribution starting at age 25 grows to over $1.4 million by 65 at 7% return — versus just $661,000 starting at 45.
Use the backdoor Roth for high incomes
If your income exceeds the Roth IRA phase-out limits, you can still contribute via the backdoor method: make a non-deductible Traditional IRA contribution, then convert it to a Roth IRA. There is no income limit on conversions.
Invest aggressively in your Roth IRA
Since all growth in a Roth IRA is tax-free, it makes sense to hold your highest-growth potential investments there. Stock ETFs and index funds are ideal candidates. Keep bonds and other lower-growth assets in your tax-deferred accounts where the tax savings matter less.
Related tools
- 401(k) Calculator — Project your employer-sponsored retirement savings with matching contributions.
- Social Security Calculator — Estimate your Social Security retirement income to complete your retirement picture.
- Investment Calculator — General investment growth projections for any account type.
Frequently asked questions
What is a Roth IRA?
A Roth IRA is an individual retirement account where contributions are made with after-tax dollars, but withdrawals in retirement are tax-free. It offers tax-free growth and tax-free distributions in retirement, making it one of the most powerful retirement savings vehicles available.
What are the Roth IRA contribution limits?
In 2025, the contribution limit is $7,000 ($8,000 if age 50+). However, eligibility phases out at higher incomes — for single filers, the phase-out range is $150,000-$165,000 of modified adjusted gross income (MAGI), and for married couples filing jointly, it is $236,000-$246,000.
How is a Roth IRA different from a Traditional IRA?
Traditional IRA contributions may be tax-deductible now, but withdrawals are taxed as ordinary income. Roth IRA contributions are after-tax (no deduction now), but withdrawals are tax-free. Roth IRAs also have no Required Minimum Distributions (RMDs) during the owner's lifetime.
Can I withdraw contributions from a Roth IRA anytime?
Yes. You can withdraw your direct contributions (not earnings) from a Roth IRA at any time, for any reason, completely tax-free and penalty-free. This makes the Roth IRA more flexible than a 401(k) for emergency access to funds.
What are the rules for withdrawing earnings?
Earnings can be withdrawn tax-free after age 59½ and a 5-year holding period from your first contribution. Early withdrawals of earnings may be subject to both income tax and a 10% penalty, with certain exceptions for first-time home purchases ($10,000 limit), education expenses, and medical hardship.
Why would a Roth IRA outperform a taxable account?
A taxable account incurs capital gains taxes on realized gains and dividends each year, reducing the compounding effect. A Roth IRA grows completely tax-free, meaning 100% of your returns compound without annual tax drag. Over decades, this difference can be enormous.
What is the backdoor Roth IRA?
The backdoor Roth IRA is a strategy for high-income earners who exceed the income limits. You make a non-deductible contribution to a Traditional IRA, then convert it to a Roth IRA. There is no income limit on Roth conversions, making this a legal workaround.
Should I choose Roth or Traditional?
Choose Roth if you expect to be in a higher tax bracket in retirement than you are now (common for early-career professionals). Choose Traditional if you expect to be in a lower tax bracket in retirement. Many people diversify by having both types of accounts.
What investments should I hold in a Roth IRA?
Since Roth IRA withdrawals are tax-free, it is best to hold investments with the highest expected growth (stocks, stock ETFs) to maximize the value of tax-free compounding. Bonds and other lower-growth assets are better held in tax-deferred accounts.
Can I have both a Roth IRA and a 401(k)?
Yes. Having both maximizes your retirement savings. You can contribute to a 401(k) through your employer and also contribute to a Roth IRA (subject to income limits). This gives you both pre-tax and tax-free retirement income streams.
Sources & references
This tool uses standard formulas and reference values from:
- • IRS — federal tax brackets, standard deduction and instructions for the tax year. irs.gov
- • U.S. SEC — Investor.gov, compound interest and investment reference material. investor.gov
- • Official national tax authority for the relevant country — link the exact rate schedule used.
Estimates only, not tax or financial advice. Confirm current figures with the official source or a qualified professional.