RMD Calculator

How Required Minimum Distributions Are Calculated

A Required Minimum Distribution (RMD) is the minimum amount the IRS requires you to withdraw each year from most tax-deferred retirement accounts, once you reach a certain age. The rule exists because these accounts grew tax-deferred for decades — the IRS eventually wants its share, so it forces withdrawals (and the resulting taxable income) to start on a schedule, rather than letting the balance grow untaxed indefinitely.

The calculation itself is simple division: take your account balance as of December 31 of the prior year, and divide it by a life expectancy factor the IRS publishes for your age.

$$RMD = \frac{\text{Account Balance}}{\text{Life Expectancy Factor}}$$

Worked Example: A 500,000-Dollar Balance at Age 75

Using the calculator's own default inputs — a 500,000-dollar balance as of last December 31, at age 75 — the IRS Uniform Lifetime Table gives a life expectancy factor of 24.6 for that age. Dividing: 500,000 divided by 24.6 comes out to roughly 20,325.20 dollars, the minimum amount that must be withdrawn (and reported as taxable income, for a traditional account) by the deadline for that year.

Why the Table Only Starts at a Certain Age

RMDs generally aren't required at all until the year you turn 73, under the SECURE 2.0 Act's current age threshold. Before that age, you're free to leave the account fully invested and untouched (aside from any plan-specific rules, such as still-working exceptions for some employer plans). This calculator reflects that threshold directly — enter an age below it and you'll see a note instead of a withdrawal amount.

The Spousal Exception This Calculator Doesn't Cover

The IRS Uniform Lifetime Table used here assumes a "typical" beneficiary situation. If your sole beneficiary is a spouse more than 10 years younger than you, the IRS instead requires the Joint Life and Last Survivor Expectancy Table, which produces a longer joint life expectancy and therefore a smaller required distribution. That table isn't included in this calculator — if this situation applies to you, consult a tax advisor or the current IRS Publication 590-B directly.

Common RMD Mistakes

Using this year's account balance instead of last year's December 31 balance is one of the most common errors — the RMD is always based on the prior year-end value, even though the account has likely grown or shrunk since then. Missing the withdrawal deadline entirely is another costly mistake: under SECURE 2.0, the IRS can impose a 25% excise tax on the shortfall (the portion of the RMD not withdrawn on time), reduced to 10% if the shortfall is corrected within the IRS's correction window. Forgetting that RMDs from a traditional account are taxed as ordinary income is a third — the amount shown here is the gross withdrawal required, not what you'll net after tax.

Can I Withdraw More Than the Minimum?

Yes — the RMD is a floor, not a cap. There's no rule stopping you from withdrawing more than the calculated minimum in any given year, and some retirees deliberately do, for reasons like managing future tax brackets, funding a large expense, or making a Qualified Charitable Distribution (QCD) directly from an IRA, which can count toward the RMD while excluding the distributed amount from taxable income. Any amount withdrawn above the required minimum is still ordinary taxable income (unless it qualifies for a QCD), and withdrawing more in one year doesn't reduce a future year's separately calculated RMD.

RMD Terms You Should Know

Uniform Lifetime Table — the IRS table used by most account owners to find their life expectancy factor, based solely on age.

Life Expectancy Factor — the divisor from the IRS table; a smaller factor at older ages means a larger required withdrawal relative to the balance.

Traditional Account — a tax-deferred retirement account (such as a Traditional IRA or 401(k)) where RMD rules apply; Roth IRAs are not subject to RMDs during the original owner's lifetime, and Roth 401(k)s are exempt too starting in 2024 under SECURE 2.0.

Excise Tax — the penalty the IRS can charge on any portion of an RMD not withdrawn by the deadline: 25% of the shortfall under SECURE 2.0, reduced to 10% if corrected within the IRS's correction window.

This calculator provides estimates for educational and planning purposes only, using the IRS Uniform Lifetime Table. It is not tax or financial advice, and does not cover every account type or beneficiary situation (see the spousal exception above). Always verify your actual required distribution against the current IRS Publication 590-B or with a qualified tax professional before taking a withdrawal.