Project tax-free retirement growth. Includes 2025 contribution limits and traditional IRA comparison.
The Roth IRA is arguably the most powerful retirement savings vehicle in the American tax code for younger workers. You contribute money you have already paid tax on, and every dollar of growth and every dollar you withdraw in retirement is completely tax-free. Over a 40-year career, this tax-free growth can add hundreds of thousands of dollars to your retirement compared to a taxable brokerage account, and often more than a traditional IRA depending on your future tax bracket. This calculator projects your Roth IRA balance at retirement given your contribution schedule, expected returns, and time horizon, then compares against a traditional IRA outcome to help you decide which account type makes more sense for your situation.
A Roth IRA is a personal retirement account named after Senator William Roth, established by the Taxpayer Relief Act of 1997. Contributions are made with after-tax dollars — money you already paid income tax on. Once inside the account, the money grows tax-free, and qualified withdrawals in retirement are completely tax-free (both contributions and earnings). This is the mirror image of a traditional IRA, where you contribute pre-tax dollars (getting an immediate tax deduction), the money grows tax-deferred, and you pay ordinary income tax on all withdrawals in retirement. The Roth structure is particularly powerful because it locks in your current tax rate on the money you contribute — if you contribute at a 22 percent marginal rate today but retire in a 32 percent bracket, you have effectively pre-paid taxes at the lower rate. All the compound growth that happens over 30 to 40 years is never taxed. Our retirement calculator models general retirement planning and our compound interest calculator shows how the tax-free growth compounds over time.
| Feature | Roth IRA | Traditional IRA |
|---|---|---|
| Contribution tax treatment | After-tax (no deduction) | Pre-tax (deductible) |
| Growth | Tax-free | Tax-deferred |
| Qualified withdrawals | Tax-free | Taxed as ordinary income |
| 2025 contribution limit (under 50) | $7,000 | $7,000 |
| 2025 catch-up (50+) | $1,000 extra ($8,000 total) | $1,000 extra ($8,000 total) |
| Income limits | Yes, phases out at high income | None for contribution (deduction limits apply) |
| Required minimum distributions | None during owner's lifetime | Required starting age 73 |
| Early withdrawal of contributions | Anytime, tax and penalty free | 10% penalty + tax if before 59.5 |
For 2025, the maximum Roth IRA contribution is 7,000 dollars if you are under age 50, or 8,000 dollars if you are age 50 or older (the extra 1,000 is called a "catch-up contribution"). These limits are shared with traditional IRA contributions — you can split between Roth and traditional but the combined total cannot exceed the annual limit. You must have earned income at least equal to your contribution amount (spouse can contribute to a spousal IRA using the working spouse's income). Roth IRAs have income phase-out ranges that reduce or eliminate direct contribution ability for higher earners. For 2025 single filers, the phase-out range is 150,000 to 165,000 dollars of modified adjusted gross income (MAGI) — contributions phase down within this range and disappear entirely above 165,000 dollars. For married filing jointly, the phase-out is 236,000 to 246,000 dollars. High earners above these limits can still contribute indirectly via the "backdoor Roth IRA" strategy: contribute non-deductible dollars to a traditional IRA, then immediately convert to a Roth IRA. The conversion is not restricted by income limits, though it creates a small tax bill on any earnings between contribution and conversion.
| Filing Status | 2025 Phase-Out Range (MAGI) |
|---|---|
| Single or head of household | $150,000 - $165,000 |
| Married filing jointly | $236,000 - $246,000 |
| Married filing separately (lived with spouse) | $0 - $10,000 |
The choice depends on comparing your current marginal tax rate to your expected retirement marginal tax rate. Choose Roth if you expect your retirement tax rate to be higher than or equal to your current rate. This typically applies to younger workers (early career, expecting income growth), people currently in low tax brackets (10, 12, or 22 percent), those who expect tax rates to rise generally (a policy bet on future tax legislation), and anyone who values the tax-free withdrawal flexibility and lack of required minimum distributions. Choose traditional if you expect your retirement tax rate to be lower than your current rate. This applies to peak-earning workers in high brackets (32, 35, 37 percent) who expect to live on less in retirement, those close to retirement with limited earning years remaining, and people who need the current-year tax deduction to manage cash flow. Many people benefit from having both accounts: Roth for tax-free flexibility and estate planning, traditional for current tax deduction and lower-bracket years. This "tax diversification" approach lets you manage which account to draw from in retirement based on your annual tax situation. Our tax calculator shows your current bracket and our retirement calculator projects general retirement needs.
The magic of a Roth IRA is compound growth on money that will never be taxed. Consider a 25-year-old contributing the maximum 7,000 dollars per year for 40 years to age 65 at a 7 percent average annual return. Total contributions: 280,000 dollars. Ending balance: approximately 1.5 million dollars. Growth portion: 1.22 million dollars — all tax-free. If that same money were in a taxable brokerage account, the growth would face capital gains tax (currently 15 to 20 percent for long-term gains for most earners), reducing the effective ending balance by 180,000 to 240,000 dollars. If it were in a traditional IRA and withdrawn in a 22 percent bracket, taxes on the full withdrawal would take approximately 330,000 dollars. The Roth advantage of tax-free growth becomes larger the earlier you start and the longer the time horizon. Starting at age 35 instead of 25 reduces the final Roth balance from 1.5 million to about 700,000 dollars — the extra 10 years cost you 800,000 dollars in retirement. Starting at 45 drops it further to about 300,000 dollars. The time value of tax-free compounding is why financial advisors uniformly recommend maxing Roth contributions in your 20s and 30s if you can afford it.
| Starting Age | Years to 65 | Total Contributed | Roth Balance at 65 (7% return) |
|---|---|---|---|
| 22 | 43 | $301,000 | $1,930,000 |
| 25 | 40 | $280,000 | $1,500,000 |
| 30 | 35 | $245,000 | $1,040,000 |
| 35 | 30 | $210,000 | $700,000 |
| 40 | 25 | $175,000 | $460,000 |
| 45 | 20 | $140,000 | $295,000 |
| 50 | 15 | $120,000 | $195,000 |
Roth IRA withdrawal rules are more flexible than any other retirement account. You can withdraw your original contributions (the money you put in, not earnings) anytime, tax-free and penalty-free, at any age, for any reason. This makes Roth IRAs uniquely useful as an emergency fund of last resort — you have access to your principal without penalty. Earnings withdrawals face different rules: to withdraw earnings tax-free and penalty-free, you must be at least 59 and a half years old AND the Roth IRA must have been open at least 5 years (the "5-year rule"). If you meet only one condition, the withdrawal is a "non-qualified distribution" and earnings are taxed and may face a 10 percent penalty. Several exceptions allow penalty-free (but potentially taxable) earnings withdrawals before 59.5: first-time home purchase (up to 10,000 dollars lifetime), qualified higher education expenses, disability, unreimbursed medical expenses exceeding 7.5 percent of AGI, health insurance premiums during unemployment, birth or adoption (up to 5,000 dollars), and substantially equal periodic payments (SEPP / Rule 72(t)). Unlike traditional IRAs, Roth IRAs have no required minimum distributions during the owner's lifetime — you can leave the money invested and growing tax-free indefinitely, making Roth IRAs particularly attractive for estate planning. Our savings calculator handles general savings goal planning outside of retirement accounts.
Several mistakes cost Roth IRA holders thousands or more over their careers. Not contributing at all in years when you have the cash flow — the 7,000 dollar annual limit does not roll over, and every year you miss is permanently lost tax-advantaged space. Contributing too much accidentally (over the annual limit or over your earned income for the year) triggers a 6 percent excess contribution penalty per year until corrected. Contributing while over the income phase-out limit creates the same excess contribution problem — always check your MAGI before contributing, or wait until year-end when you know your final income. Investing Roth funds too conservatively — cash and bonds inside a Roth waste the tax-free growth benefit because interest income was going to be low anyway. Roth accounts should hold your highest-growth, highest-return investments to maximize the tax-free advantage. Not opening a Roth in low-income years (early career, sabbatical, layoff) when the tax cost of contributing is minimal but the compound benefit is maximum. Forgetting the 5-year rule — even reaching age 59.5 does not automatically make earnings withdrawals tax-free if your first Roth contribution was fewer than 5 years ago. Withdrawing contributions unnecessarily — while allowed, doing so wastes tax-advantaged space you cannot easily replace. Our compound interest calculator and tax calculator together help you visualize the long-term impact of each contribution decision.