RMD Calculator

Retirement accounts come with a deal: you got tax breaks while saving, and the government eventually wants its share. The required minimum distribution, or RMD, is the annual amount you must withdraw from tax-deferred retirement accounts once you reach a certain age. An RMD calculator computes that amount instantly: enter your account balance on December 31 of last year and your age, and it shows your life expectancy factor, your required withdrawal, and what remains afterward.

Missing an RMD triggers one of the steepest penalties in the tax code, so knowing your number each year is not optional. This calculator gives you that number in seconds, using the IRS Uniform Lifetime Table.

What Is a Required Minimum Distribution?

An RMD is the minimum amount you must withdraw each year from tax-deferred retirement accounts such as traditional IRAs, SEP IRAs, SIMPLE IRAs, 401(k)s, 403(b)s, and similar plans. The rule exists because these accounts were funded with pre-tax dollars; the government deferred the tax, not forgave it, and RMDs ensure the tax is eventually collected.

RMDs currently begin at age 73, rising to 75 for those born in 1960 or later under the SECURE 2.0 Act. Each year’s RMD must generally be taken by December 31, with a one-time extension to April 1 of the following year for your very first RMD. That extension is a trap for the unwary, since it bunches two years of taxable withdrawals into one tax year.

Roth IRAs are exempt from RMDs during the owner’s lifetime, which is one reason Roth conversions are a popular planning strategy. But every traditional tax-deferred dollar is subject to the annual withdrawal rule once you hit the starting age.

The Uniform Lifetime Table Explained

The IRS publishes the Uniform Lifetime Table, which assigns every age a life expectancy factor, also called the distribution period. At 73 the factor is 26.5, at 80 it is 20.2, and at 90 it is 12.2, shrinking as you age because the remaining life expectancy shortens.

Your RMD is simply your prior year-end account balance divided by the factor for your age. A 500,000 dollar balance at age 75, with a factor of 24.6, produces an RMD of about 20,325 dollars. The same balance at age 90, with a factor of 12.2, requires about 40,984 dollars, roughly double, because the divisor shrank.

The table assumes a beneficiary ten years younger than you, which slightly stretches the factors compared with single life expectancy. If your spouse is more than ten years younger and is your sole beneficiary, a different Joint Life Table applies with even larger factors and smaller RMDs. The calculator uses the standard Uniform Lifetime Table, which covers the vast majority of retirees.

Which Accounts Require RMDs?

Traditional IRAs, SEP IRAs, and SIMPLE IRAs all require RMDs, aggregated across accounts: you compute the total across every IRA but may withdraw the sum from any one of them. 401(k), 403(b), and 457(b) plans from former employers each require their own separate RMD; unlike IRAs, you cannot aggregate across multiple 401(k)s.

If you are still working at 73 or beyond for the employer sponsoring your current 401(k), the still-working exception may let you delay RMDs from that plan until retirement, provided you own less than 5 percent of the company. This exception never applies to IRAs or to plans of former employers.

Roth 401(k)s were brought into line with Roth IRAs: since 2024, they are exempt from RMDs during the owner’s lifetime. Inherited retirement accounts follow entirely separate rules with their own ten-year clocks, which this calculator does not cover.

How to Use This Calculator

Find your December 31 account statement first, then:

1. Enter your total account balance as of December 31 of last year in the first box.
2. Enter your age at the end of this year in the second box.
3. Press Calculate.
4. Read the result box: your balance, the life expectancy factor for your age, your required minimum distribution, and the remaining balance after the withdrawal.
5. Press Reset to compute another account or year.

Compute each tax-deferred account separately if you hold several, then add the RMDs together for your total obligation. Remember the IRA aggregation rule: one withdrawal can cover multiple IRAs, but each 401(k) stands alone.

Worked Example 1: A First RMD at 75

Suppose your traditional IRA held 500,000 dollars on December 31 of last year and you turn 75 this year. Enter 500000 and 75, then press Calculate.

The Uniform Lifetime Table gives age 75 a life expectancy factor of 24.6. Dividing 500,000 by 24.6 yields a required minimum distribution of 20,325.20 dollars. After withdrawing it, 479,674.80 dollars remains, before any market movement.

This withdrawal is taxed as ordinary income in the year you take it. If you are in the 22 percent bracket, the RMD adds roughly 4,472 dollars to your federal tax bill, which is why retirees plan withdrawals alongside Social Security timing and Roth conversions.

Worked Example 2: A Larger Balance at 80

Suppose your 401(k) held 850,000 dollars on December 31 and you turn 80 this year. Enter 850000 and 80, then press Calculate.

Age 80 carries a factor of 20.2. Dividing 850,000 by 20.2 gives an RMD of 42,079.21 dollars, leaving 807,920.79 dollars. Compare this with the first example: a larger balance and a smaller factor combine to more than double the required withdrawal.

Notice the pattern that defines retirement tax planning: RMDs grow as a percentage of the account every year because the factor shrinks. By your late 80s the annual percentage exceeds 6 percent, which is why strategic Roth conversions in your 60s can pay off enormously.

The Penalty for Missing an RMD

The penalty for failing to take an RMD is 25 percent of the amount you should have withdrawn, on top of the ordinary income tax still owed on the distribution. On a 20,325 dollar missed RMD, that is over 5,000 dollars in penalties alone. If the failure is corrected promptly, the penalty can drop to 10 percent, but prompt correction still means filing and paying.

The IRS can waive the penalty for reasonable error if you take the missed distribution and request relief, but waivers are discretionary, not guaranteed. The far better strategy is prevention: calendar the December 31 deadline, automate withdrawals, or take RMDs early in the year.

Many custodians offer automatic RMD services that compute and distribute the amount annually. If your balance spans multiple accounts, automation per account removes the most common failure mode, which is simply forgetting one account among several.

Strategies to Manage RMDs

Qualified charitable distributions, or QCDs, let those 70 and a half or older send up to 108,000 dollars per year directly from an IRA to a charity. The QCD counts toward your RMD but is excluded from taxable income, making it the most tax-efficient way to satisfy the requirement if you give charitably anyway.

Roth conversions in your 60s and early 70s shrink the tax-deferred balance that future RMDs are computed from. Paying tax now at a known rate to avoid larger forced withdrawals later is one of the highest-value moves in retirement planning, though it requires careful bracket management.

Timing within the year matters less than most people think, since the RMD amount is fixed by the prior year-end balance, but taking it early avoids the year-end scramble and the risk of missing the deadline in a market or personal disruption.

RMDs and Tax Brackets: Why Timing Matters

Every RMD dollar is taxed as ordinary income, which means large RMDs can push you into a higher tax bracket and trigger a cascade of secondary costs. A retiree whose RMD plus Social Security crosses an income threshold can see Medicare premiums jump through IRMAA surcharges two years later, and more of their Social Security benefits become taxable.

This is why the years between retirement and RMD age are called the golden window. With earned income gone and RMDs not yet started, taxable income is often at its lifetime low, making it the cheapest time to execute Roth conversions. Each converted dollar shrinks the future balance that RMDs are computed from, permanently reducing the forced withdrawals and their bracket consequences.

The math favors early action because RMD percentages only grow. At 73 the withdrawal is under 4 percent of the balance, but by 85 it exceeds 6 percent and by 95 it passes 11 percent. A balance left untouched compounds against you: growth increases the balance while the shrinking factor increases the percentage, a double squeeze that makes preemptive conversions in your 60s one of the highest-return moves in retirement planning. Run the calculator for your projected balances at several future ages to see the squeeze coming while you still have time to act.

What Happens to RMDs When Markets Fall

RMDs are computed from the prior year-end balance, which creates a painful quirk in down markets. If your account held 500,000 dollars on December 31 and then dropped 20 percent in January, your RMD is still based on the 500,000 dollar figure. You withdraw a fixed dollar amount from a shrunken balance, locking in the losses on the shares you sell.

This sequence-of-returns sting is unavoidable under the rules, but it can be softened. Taking the RMD in-kind, transferring shares to a taxable account instead of selling them, satisfies the requirement without crystallizing the loss; the shares can recover in the taxable account. Alternatively, satisfying the RMD from the most stable holdings, like bonds or cash positions, leaves the beaten-down equities alone to rebound.

The deeper lesson is to keep a cash buffer for RMD years. Holding one to two years of expected withdrawals in stable assets means a market crash never forces you to sell stocks at the bottom. Run the calculator with a stressed balance to see your worst-case RMD, and keep that amount liquid before the downturn arrives.

RMDs for 401(k)s vs. IRAs: Key Differences

IRAs allow aggregation: you total the RMD across every traditional, SEP, and SIMPLE IRA you own, then withdraw the combined amount from whichever account you choose. This flexibility lets you draw from the best-performing account or rebalance strategically while satisfying the whole obligation at once.

Employer plans do not work that way. Each 401(k), 403(b), and 457(b) requires its own separately computed and separately withdrawn RMD. With three old employer plans, that means three calculations and three withdrawals, and missing any one of them triggers the penalty on that account’s shortfall.

One popular simplification is rolling old 401(k)s into a single IRA before RMD age begins. Consolidation turns several separate obligations into one aggregated IRA calculation, cutting paperwork and eliminating the most common cause of missed RMDs: forgetting an account exists.

7 Tips for Handling RMDs Smoothly

1. Calendar December 31 now. The deadline is unforgiving, so set reminders for October to leave a buffer.
2. Aggregate IRAs correctly. Total the RMD across all IRAs but withdraw strategically from the best-performing account.
3. Do not aggregate 401(k)s. Each employer’s plan needs its own separate RMD calculation and withdrawal.
4. Consider QCDs if you give to charity. They satisfy the RMD while keeping the amount out of your taxable income.
5. Plan Roth conversions before RMDs begin. Your 60s are the golden window for shrinking future RMDs.
6. Withhold taxes from the distribution. Having federal tax withheld at withdrawal avoids quarterly estimated payments and underpayment penalties.
7. Recompute every year. The factor changes with age and the balance changes with markets, so last year’s number is never this year’s number.

Frequently Asked Questions

1. What is an RMD?

A required minimum distribution is the amount you must withdraw each year from tax-deferred retirement accounts starting at age 73. It equals your prior year-end balance divided by your IRS life expectancy factor.

2. At what age do RMDs start?

Age 73 for most people today, rising to 75 for those born in 1960 or later. Roth IRAs never require RMDs during the owner’s lifetime.

3. How is the RMD calculated?

Divide the account balance on December 31 of the previous year by the Uniform Lifetime Table factor for your age at year-end. The calculator performs this exact computation.

4. What is the life expectancy factor?

The distribution period from the IRS Uniform Lifetime Table for your age, such as 24.6 at age 75 or 20.2 at age 80. It shrinks as you age, increasing the RMD percentage each year.

5. What happens if I miss an RMD?

You owe a 25 percent penalty on the amount not withdrawn, plus ordinary income tax on the distribution when taken. Prompt correction can reduce the penalty to 10 percent.

6. Can I withdraw more than the RMD?

Yes. The RMD is a minimum, not a maximum. Extra withdrawals are taxed as ordinary income just like the required amount.

7. Do RMDs apply to Roth IRAs?

No. Roth IRAs are exempt from lifetime RMDs, and since 2024 Roth 401(k)s are exempt too. This makes Roth accounts powerful tools for controlling taxable income in retirement.

8. Can I aggregate RMDs across accounts?

Across traditional, SEP, and SIMPLE IRAs, yes: compute the total and withdraw from any combination. Across 401(k)s from different employers, no: each plan needs its own RMD.

9. What is a qualified charitable distribution?

A direct transfer of up to 108,000 dollars per year from your IRA to a charity, available from age 70 and a half. It counts toward your RMD but is excluded from your taxable income.

10. When is the RMD deadline?

December 31 each year, except your first RMD, which may be delayed to April 1 of the following year. Taking the extension means two taxable distributions in one year, so most planners advise against it.

11. Are RMDs taxed?

Yes, as ordinary income in the year withdrawn, except for any after-tax basis in the account. Plan for the tax hit alongside Social Security and other income.

12. What if I am still working at 73?

You may delay RMDs from your current employer’s 401(k) until retirement if you own less than 5 percent of the company. The delay never applies to IRAs or old employers’ plans.

13. Do inherited IRAs have RMDs?

Yes, under separate rules: most non-spouse beneficiaries must empty the account within ten years. The annual calculation differs from the lifetime RMD method this calculator uses.

14. Should I do Roth conversions to reduce future RMDs?

Often yes, especially in your 60s when income may be temporarily low. Converting shifts money from the RMD-measured balance to tax-free Roth status, but manage the conversion amount against your current tax bracket.

15. Can the RMD be reinvested?

Absolutely. Nothing requires you to spend it. Many retirees take the RMD, pay the tax, and reinvest the remainder in a taxable brokerage account.

CONCLUSION

Required minimum distributions are the government’s way of collecting the tax that was deferred while you saved, and the math is refreshingly simple: last year’s balance divided by this year’s factor. Compute your number with the calculator, calendar the deadline, and consider QCDs or Roth conversions to keep the tax bite manageable. A few minutes of planning each year beats a 25 percent penalty every time.