Money & Finance · Free tool
Roth IRA Calculator
Estimate your Roth IRA balance at retirement assuming post-tax contributions and tax-free withdrawals. Free, instant online tool with no registration needed.
Final balance
$650,568
You contributed
$185,000
Interest earned
$465,568
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What it does
A Roth IRA calculator. Roth IRA contributions are made with after-tax money, meaning qualified withdrawals in retirement are tax-free — including all the growth. For many people, especially those with decades until retirement, this is the single best retirement account available.
At $500/month (well under the 2026 contribution limit) with 30 years of 7% returns, the balance reaches about $620,000. Every dollar of that is withdrawable tax-free in retirement — no RMDs, no surprise tax bills. Pair with a 401(k) if your employer offers a match.
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<iframe src="https://freetoolarena.com/embed/roth-ira-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="Roth IRA Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>Example input & output
Input
Current balance: $5,000
Monthly contribution: $500
Annual return: 7%
Years: 30Output
Projected balance: $620,000
Total contributed: $185,000
Growth: $435,000
All withdrawable tax-free in retirementSame contributions in a taxable brokerage would owe capital gains and dividend tax annually and at withdrawal.
How to use it
- Enter your current Roth balance.
- Enter your monthly contribution (up to the annual limit / 12).
- Use 7% as a reasonable long-term return assumption.
- Set years until retirement.
- Read the projected tax-free balance.
How it works
Key takeaways
- Roth contributions are after-tax, but ALL future growth and qualified withdrawals are 100% tax-free — the most powerful retirement vehicle for most workers under 40.
- The 22-24% federal bracket is the rough Roth-vs-traditional break-even. Below it, Roth usually wins; above it, traditional often wins.
- Unlike traditional IRAs, Roth has NO Required Minimum Distributions — you can let it grow tax-free for your whole life and pass it to heirs.
- Above the income phase-out ($161K single / $240K married in 2024), the backdoor Roth (traditional IRA → immediate conversion) still works.
Roth IRA growth uses standard compound interest: FV = P(1+r)^n + PMT × [((1+r)^n - 1) / r]. The crucial difference from a traditional IRA: contributions are after-tax, but ALL future growth and withdrawals are tax-free (after age 59½ with 5+ years since first contribution).
Advanced: when Roth beats traditional, and when it doesn’t
The Roth-vs-traditional choice is fundamentally a bet on future tax brackets. Roth wins if: you expect to be in a higher tax bracket in retirement than now (most early-career workers); you want estate-planning flexibility (Roth has no required minimum distributions, unlike traditional); you want a no-tax-impact emergency fall-back (you can always withdraw contributions tax-free). Traditional wins if: you’re in a high bracket now (32%+) and expect to be lower in retirement; you need the current-year deduction; you live in a high-tax state now and plan to retire in a no-state-tax state. The break-even is around the 22-24% federal bracket. See the Roth vs traditional break-even calculator for personalized math.
How this compares to alternatives
vs Vanguard / Fidelity Roth IRA calculator: those typically default to their own fund mix and assumed returns; ours forces you to specify the rate. vs 401k calculator: 401k has 3.3x higher contribution ceiling ($23K vs $7K) but is taxed as ordinary income on withdrawal. Most CFP-recommended order: 401k up to match → Roth IRA full → 401k remaining ceiling → HSA → taxable. See the 401k calculator. vs taxable brokerage: taxable owes capital-gains tax on sale + dividend tax annually; Roth is purely tax-free. Over 30 years, Roth typically beats taxable by 10-25% in net wealth at equivalent contribution.
Common mistakes when using this tool
- Ignoring income phase-outs. Roth IRA contributions phase out at $146-161K single / $230-240K married (2024 numbers). High earners need backdoor Roth strategy or megabackdoor Roth via 401k.
- Skipping employer 401k match. Free money beats Roth in priority order. Always max the employer match before maxing Roth IRA.
- Putting bonds in Roth. Roth’s magic is tax-free growth; bonds grow slowly. Hold bonds in tax-deferred (traditional 401k); hold high-growth stocks in Roth.
- Missing the 5-year rule. Earnings withdrawals require BOTH age 59½ AND 5 years since first contribution. Late starters may have penalties on growth withdrawals even after 60.
- Not using the “backdoor” if eligible. Above income phase-out, you can still contribute via traditional IRA → immediate Roth conversion. Trips up: pro-rata rule on existing pre-tax IRA balances.
Learn more about Roth IRAs
- Roth vs Traditional IRA — the bracket-arbitrage decision, when each wins, and break-even math.
- Backdoor Roth IRA — the high-income workaround, the pro-rata rule trap, and the mega-backdoor variant.
- The Roth 5-year rule — both rules (one for contributions, one for conversions), and why late starters can hit penalties.
- Compound interest glossary — the math that makes 30-year tax-free growth so powerful.
When to use this tool
- Annual retirement planning.
- Income below the Roth IRA contribution limit.
- Expecting to be in the same or higher tax bracket in retirement.
When not to use it
- If your income exceeds direct Roth limits — consider a backdoor Roth (different mechanics).
- Traditional IRA or 401(k) analysis (those involve tax deductions now, taxable withdrawals later).
Common use cases
- Planning tax-free retirement income.
- Modeling the value of maxing out Roth contributions each year.
- Comparing Roth IRA vs 401(k) prioritization.
Frequently asked questions
- What’s the Roth IRA contribution limit?
- The IRS adjusts the limit annually. For current year limits and income phase-outs, check IRS Publication 590-A before contributing.
- Can I withdraw Roth IRA contributions before retirement?
- Contributions (not growth) can be withdrawn tax- and penalty-free at any time. Growth withdrawn before age 59½ and 5 years from first contribution is usually taxable and may owe a 10% penalty.
- What's the 2026 Roth IRA contribution limit and income phase-out?
- 2024 limits (which apply for 2025 contributions made by April 15, 2025): $7,000/year for under 50, $8,000 with $1,000 catch-up for age 50+. 2025 limits (made by April 15, 2026): $7,000/$8,000 (no change). Income phase-outs (single filer): $146,000-$161,000 in 2024, $150,000-$165,000 in 2025. Married filing jointly: $230,000-$240,000 in 2024, $236,000-$246,000 in 2025. Above the phase-out, you can't contribute directly; consider the backdoor Roth strategy. IRS adjusts limits annually for inflation.
- What is a backdoor Roth IRA?
- A workaround for high earners above the Roth IRA income limits. Contribute to a traditional IRA (no income limit on contributions, but no tax deduction if you have a workplace retirement plan and earn above ~$83K single / $137K joint in 2024), then immediately convert to Roth IRA. Conversion is taxable on any pre-tax money but not on after-tax contributions. Requires no traditional IRA balance to avoid pro-rata rule complications. Common strategy for $200K+ earners. The 'mega backdoor Roth' is a related strategy for those with workplace plans allowing after-tax contributions and in-plan Roth conversions.
- Should I prioritize Roth IRA over 401(k)?
- Standard hierarchy: (1) 401(k) up to employer match (free money), (2) Max Roth IRA ($7K/year), (3) Max remaining 401(k) ($23.5K total in 2026), (4) Health Savings Account if eligible ($4,300 single / $8,550 family 2025), (5) Taxable brokerage. Reasoning: capture match first, then Roth IRA's tax-free growth and flexibility, then top off 401(k) for higher contribution ceiling. HSAs offer triple tax benefits if you can pay medical expenses out of pocket and let HSA grow.
- What investments should I hold in my Roth IRA?
- Tax-favored placements: high-growth stocks (since growth is tax-free), small-cap and emerging markets (high expected return + tax-free growth), REITs (REITs are tax-inefficient in taxable accounts due to ordinary-income dividends; perfect for Roth). Less-favored placements: low-growth bonds (waste tax-free space), short-term trading (gains aren't taxed elsewhere if held long-term, so Roth's advantage is smaller). Most retail investors use target-date funds (e.g., Vanguard 2055) or 3-fund portfolios (US stocks 60%, international stocks 30%, bonds 10%). Simplicity beats complexity for most.
- Is this Roth IRA calculator accurate for tax projections?
- The compound-growth math is exact. The 'tax-free in retirement' framing assumes you follow Roth qualification rules (age 59.5 + 5 years from first contribution for earnings; contributions are always withdrawable tax-free). The calculator does NOT model: state-tax differences (Roth contributions are after-tax federal, but several states tax differently — Pennsylvania, for example, taxes traditional 401(k) contributions, making Roth less tax-arbitraged there); estate-tax implications (Roth IRAs pass tax-free to heirs but stretch-IRA rules changed under SECURE Act); RMD calculations on inherited Roth (10-year rule). For most workers projecting 20-30 years of accumulation, the projected balance is accurate within 1-2%; tax-saved is accurate to the extent your retirement bracket assumption holds.
- How do I calculate Roth IRA growth manually?
- Use the future-value formula for a series: FV = P(1+r)^n + PMT × [((1+r)^n - 1) / r] where P is starting balance, PMT is periodic contribution, r is the periodic rate, and n is the number of periods. Example: $5K starting, $583/month ($7K/year ÷ 12), 7% annual (0.583%/month), 30 years (360 months). FV = 5000 × (1.00583)^360 + 583 × [((1.00583)^360 - 1) / 0.00583] ≈ $40K + $710K = $750K. Excel: =FV(0.07/12, 30*12, -583, -5000). All Roth means: that $750K is yours, tax-free, in retirement (assuming qualification). Compare to a traditional IRA paying 24% in retirement: $750K × 0.76 = $570K after-tax — Roth saves $180K on that scenario.
- What's the best brokerage for a Roth IRA?
- Top tier (zero fees, broad fund selection): Fidelity, Schwab, Vanguard. Each offers $0 trading commissions, no account fees, and access to their proprietary index funds with rock-bottom expense ratios (Fidelity ZERO funds: 0.00% expense; Schwab S&P 500 fund SWPPX: 0.02%; Vanguard VTSAX: 0.04%). Robo-advisors (good for hands-off): Betterment, Wealthfront — manage for ~0.25% fee. App-first brokerages (good UX, watch for fees): Robinhood (free but limited tools), M1 Finance (free, automated allocations). Pick based on whether you want to pick funds (Fidelity/Schwab/Vanguard) or have a robot manage it (Betterment/Wealthfront). Don't open at a high-fee broker (Edward Jones, Merrill Lynch full-service); 1% AUM eats 25% of your 30-year return.
See how this compares
- Head-to-headRoth IRA vs Traditional IRARoth IRA vs Traditional IRA: how each is taxed, who each is for, and which gives you more retirement spending power. Free compound interest calculator included.
- Head-to-head401(k) vs Roth IRA401(k) vs Roth IRA head-to-head: employer match, contribution limits, tax treatment, and the exact order to fund them. Free projection tools included.
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Learn more
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