How is a Roth IRA calculated in 2026?

The 2026 Roth IRA calculation involves three steps: (1) Check eligibility by verifying MAGI against 2026 phase-out limits ($153k-$168k for singles, $242k-$252k for joint filers), (2) Calculate future value using the formula FV = P(1 + r)^n + C * [((1 + r)^n - 1) / r], where P is starting balance, C is annual contribution, r is return rate, and n is years until retirement, (3) Compare tax savings by calculating the difference between Roth growth (tax-free) and equivalent taxable account growth (with 0.5% annual tax drag).

Roth IRA Calculator: Tax-Free Growth & Limits

Roth IRA Calculator: 2026 Tax-Free Growth & Eligibility Tool

2026 Roth IRA contribution limit $7,500 ($8,600 at age 50+), single phase-out $153K-$168K, joint $242K-$252K. Side-by-side Roth vs taxable account projections with a Backdoor Roth alert above the cap.

What This Roth IRA Calculator Does

This calculator projects Roth IRA growth based on 2026 contribution limits ($7,500 base, $8,600 with the $1,100 age-50+ catch-up), checks eligibility against the MAGI phase-out ranges ($153K-$168K single, $242K-$252K joint), and compares Roth growth to a taxable account at the same return and time horizon. Inputs: age, filing status, MAGI, annual contribution, expected return, and years to retirement. Outputs: projected balance at retirement, monthly tax-free income at a 4% withdrawal rate, the dollar advantage over the taxable comparison, and any phase-out or Backdoor Roth alerts. The model does not handle state income tax, early-withdrawal penalties, or the tax cost of Roth conversions; consult a tax advisor for those.

How the Math Works: Roth IRA Growth Projection

Roth IRA growth uses the future value of an annuity formula, assuming annual contributions at the start of each period:

FV = C × ((1 + r)ⁿ − 1) / r × (1 + r)

where C is the annual contribution, r is the expected annual return (as a decimal), and n is years to retirement. The taxable account comparison applies a capital gains drag of 15–20% on realized gains at withdrawal, reducing the effective end value. The tax-free advantage equals the difference between the Roth (no tax on withdrawal) and taxable (after capital gains) outcomes.

Worked Example:

$7,500/year at 7% for 30 years: FV = $7,500 × ((1.07)³⁰ − 1) / 0.07 × 1.07 ≈ $759,000 tax-free. The same contributions in a taxable account (15% capital gains on $534,000 of gains) yield roughly $679,000 after taxes, an $80,000 tax-free advantage.

How to Use This Calculator

Enter your personal details and contribution assumptions to project Roth IRA growth and compare against a taxable account.

Age & Filing Status:

Determines the 2026 contribution limit ($7,500 or $8,600 with catch-up) and selects the correct MAGI phase-out range (single vs. married filing jointly).
MAGI (Modified Adjusted Gross Income):

Checks eligibility against the 2026 phase-out ranges and computes the reduced contribution if you fall inside the range. Above the upper threshold, results show a Backdoor Roth alert instead of a direct contribution number.
Annual Contribution:

The amount you plan to contribute each year, validated against the 2026 limit for your age.
Expected Return & Years:

Annual growth rate (e.g., 7%) and investment horizon. Longer horizons amplify the tax-free compounding advantage.
Results:

Projected Roth balance, estimated monthly tax-free income (4% rule), tax savings vs. taxable account, and eligibility alerts.

Understanding Roth IRAs: Tax-Free Growth and Withdrawals

What is a Roth IRA?

A Roth IRA is a retirement account that offers tax-free growth and tax-free withdrawals in retirement. Unlike Traditional IRAs, you contribute after-tax dollars (no immediate tax deduction), but all qualified withdrawals are 100% tax-free. This makes Roth IRAs ideal for those who expect to be in the same or higher tax bracket in retirement.

2026 Roth IRA Contribution Limits

2026 Roth IRA limits are $7,500 if you're under 50 and $8,600 if you're 50 or older (the $1,100 catch-up sits on top of the $7,500 base). The cap is shared with Traditional IRA contributions: if you put $3,000 into a Traditional IRA, you can only contribute $4,500 to a Roth in the same year. You also can't contribute more than your taxable compensation for the year.

The Tax-Free Advantage

Roth withdrawals are tax-free; taxable accounts face capital gains tax on growth (15-20% for most filers) and annual tax drag on dividends. On the same $7,500-a-year, 30-year, 7% scenario from the worked example, the Roth ends at about $759,000 of tax-free balance versus roughly $679,000 in a taxable account after 15% capital gains, an $80,000 advantage. Stretching the horizon to 40 years pushes the Roth past $1.6M and the taxable comparison to about $1.4M, so the gap widens to roughly $195,000.

2026 Eligibility and Phase-Out Ranges

2026 Income Limits (MAGI Phase-Out Ranges)

2026 Roth IRA income limits: Single filers: $153,000-$168,000 MAGI (phase-out range). Married filing jointly: $242,000-$252,000 MAGI (phase-out range). If your MAGI is below the phase-out range, you can contribute the full amount. Within the range, your contribution is reduced proportionally. Above the range, you're not eligible for direct contributions but may use a Backdoor Roth conversion.

How Phase-Out Works

If your MAGI falls within the phase-out range, the contribution limit drops linearly from full to zero across the $15,000 range. A single filer at $160,000 MAGI is 7/15 of the way through ($153K-$168K), so the $7,500 limit becomes $7,500 × 8/15 = $4,000 (rounded to the nearest $10 per IRS rules). At $168,000 MAGI direct contributions hit zero. Reducing MAGI by maxing pre-tax 401(k) or HSA contributions can pull you back below the bottom of the range and restore the full limit.

Modified Adjusted Gross Income (MAGI)

Roth-IRA MAGI starts from your AGI (Form 1040 line 11) and adds back the Traditional IRA deduction, the student loan interest deduction, and a handful of less common items (foreign earned income exclusion, foreign housing exclusion, employer-provided adoption assistance, excluded U.S. savings bond interest). For most W-2 earners with no Traditional IRA contributions, MAGI for this purpose equals AGI.

The Backdoor Roth Strategy

What is a Backdoor Roth?

A Backdoor Roth lets high earners above the direct-contribution limits ($168K single / $252K joint MAGI in 2026) still fund a Roth: contribute to a nondeductible Traditional IRA, then convert that Traditional IRA to a Roth. The conversion itself has no income limit. Whether the conversion is taxable depends on the pro-rata rule (covered below).

How to Execute a Backdoor Roth

Step 1: Contribute to a Traditional IRA (no income limit for contributions). Step 2: Convert the Traditional IRA to a Roth IRA (no income limit for conversions). Step 3: Pay taxes on any pre-tax amounts converted. Important: If you have existing pre-tax Traditional IRA balances, the conversion may be partially taxable due to the 'pro-rata rule.' Consult a tax advisor for implementation.

The Pro-Rata Rule (the Catch)

The IRS treats all your Traditional, SEP, and SIMPLE IRAs as one pool when figuring the taxable portion of a conversion. With $50,000 of pre-tax IRA balances and a fresh $7,500 nondeductible contribution, only $7,500 / ($50,000 + $7,500) = ~13% of any converted dollar is tax-free; the other 87% is taxed at your ordinary rate. The Backdoor Roth works cleanly when your existing pre-tax IRA balance is zero or close to it. A common workaround is rolling pre-tax IRA balances into a 401(k) that accepts incoming rollovers (401(k) balances aren't included in the pro-rata calculation), then doing the Backdoor conversion the following year. Always consult a tax advisor before executing.

Roth IRA vs. Taxable Account: The Tax-Free Advantage

Tax Drag on Taxable Accounts

Taxable accounts face annual tax drag: dividends are taxed at 15-20% (qualified dividends), and capital gains are taxed at 15-20% when realized. This tax drag reduces compounding over time. A $7,500/year investment at 7% return in a taxable account may only achieve 6.5% after-tax return due to annual tax drag on dividends and rebalancing.

Capital Gains Taxes at Withdrawal

Taxable accounts face capital gains tax (15% for most filers, 20% for high earners) on growth when you sell investments. A $1M taxable account with $300K of long-term gains owes $45K-$60K in capital gains tax at sale. Roth withdrawals have zero tax on qualified distributions, preserving the full account value.

The Lifetime Tax Savings

On the 30-year worked example above ($7,500 a year, 7% return), the Roth saves about $80,000 in capital gains tax versus a taxable account paying 15% on $534,000 of growth at withdrawal. Stretching to 40 years pushes the tax saved past $195,000 ($1.3M of growth at 15%). At a 20% capital gains rate (high earners), the 30-year saving rises to roughly $107,000. The actual figure depends on contribution amounts, return, dividend yield, and your capital gains rate at withdrawal.

No RMDs During the Owner's Lifetime

RMD Rules at a Glance

Traditional, SEP, and SIMPLE IRAs all require Required Minimum Distributions starting at age 73 (rising to 75 for those who turn 74 after 2032 under SECURE 2.0). The first RMD can be deferred to April 1 of the year after you turn 73, but every subsequent year's RMD is due by December 31. RMDs are calculated each year by dividing the prior year-end account balance by an IRS life-expectancy factor; the resulting distribution is taxed at your ordinary rate.

Roth Stays Untouched

Roth IRAs require no distributions while the original owner is alive. That makes the Roth the natural account to leave compounding when you don't need the money for spending. A $1M Roth left alone at 7% reaches roughly $1.97M after 10 years and $3.87M after 20, all tax-free. A Traditional IRA over the same horizon would force out 4-7% per year as RMDs, taxed at your ordinary rate.

Inherited Roth Accounts

Non-spouse beneficiaries inherit under the SECURE Act 10-year rule (full balance withdrawn within 10 years of the original owner's death), but Roth withdrawals stay tax-free throughout. A $500,000 inherited Traditional IRA forced out at $50K/year and taxed at 22-24% costs the heir $11K-$12K a year in federal tax; a $500,000 inherited Roth costs zero. Spouses inheriting either type can roll into their own IRA and follow standard rules.

The 5-Year Rule and Age 59½ Requirements

Qualified Withdrawals

Earnings can be withdrawn tax-free if: (1) the account is at least 5 years old, and (2) you're age 59½ or older. Contributions (not earnings) can be withdrawn tax-free at any time, regardless of age or account age. The 5-year clock starts on January 1 of the year you make your first Roth IRA contribution.

Early Withdrawal Penalties

Earnings withdrawn before age 59½ or before the 5-year clock has run owe ordinary income tax plus a 10% penalty. Statutory exceptions exist for first-time home purchase (up to $10,000 lifetime), qualified higher-education expenses, birth or adoption, disability, certain medical expenses, and death.

Planning Withdrawal Timing

Because the 5-year clock starts on January 1 of the contribution year, opening a Roth at 55 means earnings are fully qualified at 60 (5 years AND past 59½). Opening at 58 means waiting until 63. The clock applies once per taxpayer for direct contributions; conversions reset their own separate 5-year early-withdrawal-penalty clock for each conversion.

Roth IRA vs. Traditional IRA: Which to Choose?

Choose Roth IRA If

Your current marginal rate is lower than what you expect in retirement (you pay tax now at the lower rate), you have a long compounding horizon ahead of you, you want flexibility on withdrawal timing, or you want a tax-free pool of retirement income to manage AGI-sensitive items (Medicare IRMAA, ACA subsidies, capital gains brackets) later. Young professionals on an upward income path are the textbook fit.

Choose Traditional IRA If

Your current marginal rate is higher than what you expect in retirement, you want the immediate deduction to reduce this year's taxable income, or your MAGI is above the Roth direct-contribution caps and you can't (or don't want to) work the Backdoor path. Traditional IRAs require RMDs starting at age 73 and tax all distributions at your ordinary rate.

Tax Diversification Strategy

Having both Roth and Traditional balances at retirement gives you a knob to turn. In years when you want to keep AGI low (Medicare IRMAA brackets, ACA subsidy thresholds, capital gains stacking), pull from Roth. In years with room in lower brackets, pull from Traditional to fill the 10% and 12% bands. The blended effective rate over a long retirement can be meaningfully lower than drawing from a single account type.

FAQ

What are the 2026 Roth IRA contribution limits?

2026 limit is $7,500 if you're under 50 and $8,600 if you're 50 or older (the $1,100 catch-up sits on top of the $7,500 base). The cap is shared with Traditional IRA contributions: $3,000 to Traditional plus $4,500 to Roth equals the same $7,500, not $7,500 plus $7,500. You also can't contribute more than your taxable compensation for the year.

What is the 2026 Roth IRA income limit?

Direct Roth contributions phase out by MAGI: $153,000-$168,000 for single filers, $242,000-$252,000 for married filing jointly, and $0-$10,000 for married filing separately who lived with their spouse during the year. Below the bottom of the range you can contribute the full amount; inside the range the limit drops linearly to zero by the top of the range; above the top, no direct contribution is allowed (but the Backdoor Roth path may still apply).

What is a Backdoor Roth IRA?

A Backdoor Roth lets high earners above the direct-contribution limits ($168K single / $252K joint MAGI in 2026) still fund a Roth: contribute to a nondeductible Traditional IRA, then convert it to a Roth. The catch is the IRS pro-rata rule. The IRS treats all your Traditional, SEP, and SIMPLE IRAs as one pool when figuring the taxable portion of any conversion. With $50,000 of pre-tax IRA money already in place, only about 13% of a fresh $7,500 nondeductible contribution converts tax-free; the rest is taxed at your ordinary rate. The Backdoor strategy works cleanly when your existing pre-tax IRA balance is at or near zero, often by first rolling those balances into a 401(k) that accepts incoming rollovers. Talk to a tax advisor before executing.

How does a Roth IRA compare to a taxable account?

Roth withdrawals are tax-free; a taxable account owes 15-20% capital gains tax on growth at sale plus annual tax drag on dividends. On the worked example below ($7,500 a year for 30 years at 7%), the Roth ends at about $759,000 versus roughly $679,000 in the taxable account, an $80,000 advantage. The gap widens with longer horizons and higher dividend yields, since the Roth avoids both the annual drag and the back-end capital gains hit.

Do Roth IRAs have Required Minimum Distributions (RMDs)?

No, Roth IRAs have no RMDs during the original owner's lifetime. Traditional, SEP, and SIMPLE IRAs all require RMDs starting at age 73 (rising to 75 in 2033 under SECURE 2.0). Inherited Roth IRAs do face the 10-year drawdown rule for most non-spouse beneficiaries, but those withdrawals stay tax-free, unlike inherited Traditional IRAs which are taxed at the beneficiary's ordinary rate.

What is the 5-year rule for Roth IRAs?

Earnings come out tax-free only if (1) the Roth has been open for at least five tax years and (2) you're 59½ or older. Direct contributions can be withdrawn tax-free at any time, regardless of age or how long the account has been open. The five-year clock starts on January 1 of the year you make your first Roth contribution; conversions have their own separate five-year clock for early-withdrawal penalty purposes.

Should I choose a Roth IRA or Traditional IRA?

The decision turns on your current marginal tax rate vs your expected rate in retirement. Roth wins when your future rate is at least as high as today's (you pay tax now at the lower rate). Traditional wins when your current rate is higher (you defer tax to a lower future rate). Other factors that tilt toward Roth: you want no RMDs, you're young enough to compound for decades, or you want tax diversification across account types in retirement.

Can I contribute to both a Roth IRA and Traditional IRA?

Yes, but the combined limit still applies: $7,500 total (or $8,600 at 50+) across both account types in 2026. For example, $3,000 Traditional plus $4,500 Roth equals the $7,500 cap. Whether the Traditional portion is deductible depends on whether you (or your spouse) are covered by a workplace retirement plan and on your MAGI; deductibility phases out separately from the Roth eligibility ranges above.

How much can I withdraw tax-free from a Roth IRA?

Direct contributions: any amount, any time, no tax or penalty. Earnings: tax-free only when both conditions are met (account at least 5 years old AND you're 59½ or older). At a 4% safe withdrawal rate, a $759,000 Roth supports about $30,360 a year, or $2,530 a month, of fully tax-free retirement income.

What happens if I contribute too much to a Roth IRA?

Excess contributions face a 6% excise tax per year until you correct them. Two ways out: (1) withdraw the excess plus any earnings on it before the tax filing deadline (including extensions), or (2) apply the excess against next year's contribution limit. The 6% penalty stacks year-after-year if left uncorrected, so it's worth catching early.

Current standing

Income & eligibility (2026)

Contributions

Assumptions

Tax-free retirement path

Key metrics

Roth vs. traditional IRA

Tax-free growth

Roth vs. taxable

Backdoor Roth

Tax-free compounding

No owner RMDs

Methodology

Future value of an annuity

2026 eligibility

2026 MAGI phase-out ranges

Tax drag vs. taxable account

Tax drag assumptions (2026)

How this calculator works (2026)

What Drives the Roth IRA Decision

Backdoor Roth and the pro-rata rule

The Roth advantage on a typical scenario

No RMDs during the owner's lifetime

Phase-out is linear, not a cliff