IRA Withdrawal Tax Calculator

Enter the Withdrawal Amount you plan to take from your traditional IRA and your Current Age. Select your Filing Status (Single or Married Filing Jointly) — this determines your tax brackets, standard deduction, and IRMAA thresholds. Enter your Other Taxable Income for the year (wages, pensions, interest, etc.) — this is the income the withdrawal stacks on top of.

Choose your State of Residence from the dropdown. The calculator applies your state's income tax rate to both the taxable withdrawal and any additional Social Security made taxable by the withdrawal. If you're under 59½, select a Penalty Exception if one applies (SEPP, disability, medical, or first-home purchase).

In Advanced Options, enter your annual Social Security income to see the tax torpedo effect, your non-deductible IRA basis and total IRA balance for pro-rata calculations, and optionally switch to itemized deductions if they exceed your standard deduction.

Withdrawal Amount

The gross amount you plan to withdraw from your traditional IRA this year. All withdrawals from traditional IRAs are generally treated as ordinary income. This is different from a Roth IRA, where qualified withdrawals are tax-free.

Current Age & Penalty Exceptions

Withdrawals before age 59½ incur a 10% early withdrawal penalty on the taxable portion, unless a penalty exception applies:

• SEPP / 72(t): Substantially equal periodic payments — commits you to a series of withdrawals based on life expectancy
• Disability: Total and permanent disability
• Medical expenses: Unreimbursed medical expenses exceeding 7.5% of AGI
• First-time home purchase: Up to $10,000 lifetime limit (the excess above $10,000 is still penalized)

At age 73+, you must begin taking Required Minimum Distributions.

Filing Status

Determines your federal tax brackets, standard deduction amount, Social Security taxation thresholds, and IRMAA tiers. Married filing jointly has wider brackets and higher thresholds.

Other Taxable Income

Your gross income for the year before the IRA withdrawal. Include wages, pensions, interest, dividends, capital gains, and other taxable income. The IRA withdrawal stacks on top of this to determine your marginal bracket.

State of Residence

Each state's top marginal income tax rate is applied to the taxable portion of your withdrawal plus any additional Social Security made taxable. States with 0% (Alaska, Florida, Nevada, etc.) have no state income tax. Some states offer retirement income exclusions that are not individually modeled — check your state's rules.

Social Security Income

Your total annual Social Security benefits. The IRS uses a "combined income" formula to determine how much of your SS is taxable. An IRA withdrawal increases combined income, which can cause up to 85% of your SS benefits to become taxable — this is the "tax torpedo."

Non-Deductible IRA Basis & Total IRA Balance

If you made after-tax (non-deductible) contributions to any traditional IRA, enter the total basis and your total IRA balance before this withdrawal. The IRS pro-rata rule (Form 8606) determines the tax-free percentage:

tax_free_ratio = non_deductible_basis / total_IRA_balance
tax_free_amount = withdrawal × tax_free_ratio

The balance is entered as the current balance before the withdrawal. Per Form 8606, the denominator equals the year-end balance plus distributions — if this is your only distribution, your current balance IS that denominator.

Itemized Deductions

By default, the calculator uses the 2026 standard deduction ($16,100 single / $32,200 married, plus $2,050/$1,650 per spouse age 65+, plus the $6,000 OBBBA senior deduction). Check "Use itemized deductions" if yours exceed the standard deduction (mortgage interest, state/local taxes up to $10,000, charitable contributions, etc.).

1. Standard Deduction

The 2026 standard deduction is subtracted from gross income before applying tax brackets. This is the most impactful fix over naive bracket calculators — without it, a retiree with modest income is overtaxed by thousands.

Single: $16,100 (+ $2,050 if age 65+, + $6,000 OBBBA senior deduction)
Married: $32,200 (+ $3,300 if both 65+, + $12,000 OBBBA senior deduction)

2. Pro-Rata Rule (Form 8606)

Each withdrawal is a proportional mix of pre-tax and after-tax money:

tax_free_ratio = non_deductible_basis / total_IRA_balance_before_withdrawal
taxable_withdrawal = withdrawal × (1 - tax_free_ratio)

The comparison table recomputes this ratio for each row — a $100,000 withdrawal does NOT use the same ratio as a $10,000 withdrawal when the denominator changes. The 99% cap from earlier versions is removed; full basis recovery is allowed.

3. Social Security Taxation (Tax Torpedo)

The calculator computes taxable SS with and without the withdrawal using the IRS combined income formula:

combined_income = other_income + taxable_withdrawal + (SS × 0.5)

Thresholds (single / married):
  Threshold 1: $25,000 / $32,000
  Threshold 2: $34,000 / $44,000

taxable_SS = min(85% of SS, 50% × excess over T1 + 85% × excess over T2)
SS_tax_impact = taxable_SS_with_withdrawal - taxable_SS_without

This additional taxable SS is included in both federal and state tax calculations.

4. Federal Tax (Bracket-Based with Deduction)

Federal tax uses calculateFederalTax from the shared tax library, which applies the 2026 brackets after subtracting the standard deduction (or itemized deductions). The incremental tax of the withdrawal is:

federal_tax = tax_on(other_income + taxable_withdrawal + taxable_SS) - tax_on(other_income + baseline_SS)

5. State Tax

Applied to the taxable withdrawal plus any additional SS made taxable by the withdrawal:

state_tax = (taxable_withdrawal + SS_tax_impact) × state_rate

6. IRMAA Surcharges

Medicare uses MAGI from 2 years prior. A 2026 withdrawal affects 2028 premiums. MAGI includes AGI plus tax-exempt interest (the calculator uses AGI = other income + taxable withdrawal + taxable SS).

For married filing jointly, both spouses pay the surcharge, so the amount is doubled.

IRMAA_impact = IRMAA_surcharge(MAGI_with) - IRMAA_surcharge(MAGI_without)

7. Total Tax

total_tax = federal_tax + state_tax + early_penalty + IRMAA_impact
effective_rate = total_tax / withdrawal_amount
net_after_tax = withdrawal_amount - total_tax

The tax torpedo occurs when a modest IRA withdrawal triggers a cascade:

1. Withdrawal increases AGI — pushes you into a higher bracket
2. More SS becomes taxable — for every $1 withdrawn, up to $0.85 of SS can become taxable, meaning taxable income increases by $1.85
3. Higher bracket on the combined increase — you pay the new bracket rate on both the withdrawal and the newly-taxable SS
4. IRMAA threshold crossed — adds thousands in Medicare surcharges for two years later

A retiree in the 12% bracket might assume $1,200 tax on a $10,000 withdrawal. But after the torpedo, the true marginal rate can exceed 40%. This calculator exposes the full cost.

If you're under 59½, the 10% penalty is waived for:

• SEPP / 72(t): A series of substantially equal periodic payments based on life expectancy. Must continue for 5 years or until 59½, whichever is later.
• Disability: Total and permanent disability as defined by the IRS.
• Medical expenses: Unreimbursed medical expenses exceeding 7.5% of your AGI.
• First-time home purchase: Up to $10,000 lifetime limit. The excess above $10,000 is still penalized.
• Other exceptions not modeled: Health insurance while unemployed, qualified reservist distributions, IRS levy, birth/adoption ($5,000 limit).

1. Fill lower brackets: In low-income years, withdraw up to the top of the 12% bracket (or convert to Roth). This is often cheaper than being forced into higher brackets later.
2. Coordinate with Social Security: Delaying SS allows Roth conversions at lower rates before RMDs and benefits begin.
3. Qualified Charitable Distributions (QCDs): After age 70½, donate up to $105,000 directly from your IRA to charity. A QCD counts toward your RMD but isn't included in taxable income.
4. Mind IRMAA thresholds: Sometimes withdrawing a few hundred dollars less avoids a surcharge of $1,000+.
5. Spread large withdrawals: Instead of one large withdrawal, take money across two tax years to keep annual income lower.

• Net After Tax: Cash you receive after all taxes — the number that matters for your retirement budget.
• Total Tax: Federal + state + penalty + IRMAA. The tax breakdown card shows each component.
• Effective Rate: Total tax divided by withdrawal amount — the true blended rate.
• Marginal Bracket: The federal bracket your last dollar falls in. Reducing the withdrawal might drop you to a lower bracket.
• SS Tax Impact: Additional Social Security benefits made taxable by this withdrawal — the tax torpedo in dollar terms.
• IRMAA Surcharge: If triggered, shows the annual Medicare surcharge affecting premiums two years from now. Doubled for married couples.
• Pro-Rata Tax-Free: The portion of your withdrawal that's a return of non-deductible contributions.
• Comparison Table: Each row independently recomputes pro-rata, SS taxation, IRMAA, and bracket placement. Larger withdrawals don't just cost more — they often cost disproportionately more.

1. Forgetting the standard deduction: Bracket calculators that start taxing at dollar one overstate tax by thousands. The 2026 standard deduction shelters $16,100–$47,500+ from tax (including age 65+ additional and OBBBA senior deduction).
2. Using the same pro-rata for all amounts: The tax-free percentage changes as the withdrawal amount changes relative to your IRA balance. Each amount has its own ratio.
3. Ignoring the tax torpedo: A $10,000 withdrawal that makes $8,500 of SS taxable creates $18,500 of new taxable income, not $10,000.
4. Misunderstanding IRMAA timing: Medicare surcharges use income from 2 years prior. A 2026 withdrawal affects 2028 premiums.
5. Missing penalty exceptions: SEPP, disability, and medical expense exceptions can eliminate the 10% penalty for early withdrawals.
6. Failing to take RMDs: After age 73, missing an RMD triggers a 25% excise tax on the shortfall amount.

Use the calculator above to model your planned IRA withdrawal and see the true cost — including the standard deduction, the tax torpedo, IRMAA surcharges, and the pro-rata rule. Test different amounts with the comparison table to find the most tax-efficient withdrawal level.

For more tools, see the full suite of retirement calculators. To learn more about withdrawal strategy, read about tax-efficient withdrawal ordering.