This estimator calculates a current-year required minimum distribution and applies a user-entered marginal tax rate to show an estimated tax impact and after-tax cash amount.
The page is useful for quick planning when you already know which retirement balance and age apply and want to see how much of the distribution may remain after an incremental tax assumption. It uses the IRS Uniform Lifetime Table for the distribution denominator. The tax calculation is intentionally simplified: it does not reproduce federal tax brackets or determine your actual return liability, and a different life-expectancy table may apply in special spouse-beneficiary cases.
1. Enter the prior year-end balance
Use the retirement account balance from the end of the preceding calendar year.
2. Enter your current age
The calculator selects the Uniform Lifetime denominator associated with that age.
3. Set a tax-rate assumption
Enter the marginal rate you want applied to the RMD for this planning estimate.
4. Review tax and net cash
Compare the calculated RMD, estimated tax, and the amount remaining after the assumed tax.
The age-based denominator is taken from the Uniform Lifetime Table. The tax rate is supplied by the user, so the result is a scenario estimate rather than a tax-return computation.
The headline figure is the estimated incremental tax associated with the calculated RMD at the rate you entered.
Actual federal and state liability can differ materially. Use current tax guidance or a qualified professional for filing decisions.
Given: $1,000,000 prior year-end balance, age 73, and a 24% tax-rate assumption.
Calculation: RMD = $1,000,000 ÷ 26.5 = $37,735.85. Estimated tax = $37,735.85 × 24% = $9,056.60. After-tax RMD = $28,679.25.
Result: Estimated tax is $9,056.60.
Interpretation: Under the simplified 24% assumption, about 76% of the RMD remains before any other tax interactions.
No. You enter an effective marginal rate to estimate the incremental tax associated with the RMD. A full return can produce a different result because deductions, credits, capital gains, Social Security taxation, and other income interact.
The standard RMD formula uses the account balance at the end of the immediately preceding calendar year. That balance is divided by the applicable distribution period for the current-year RMD.
You can add an estimated combined rate if that matches your planning purpose, but state rules differ. For a federal-only view, enter only your federal marginal assumption.
It can. The simple rate input does not model bracket stacking or secondary effects, so use the result as an incremental estimate rather than a full tax projection.
A different IRS table may apply. This page uses the Uniform Lifetime Table and is not the appropriate table-based calculation for that spouse-beneficiary situation.