RMD Calculator United States

What the RMD calculator does

Tax-deferred retirement accounts grow without tax along the way, but once you reach a certain age the rules require you to withdraw a minimum amount each year. Enter your account balance and age, and this RMD calculator works out your Required Minimum Distribution and estimates the penalty that can apply if you fail to take it, so you can plan the withdrawal before the deadline.

How a Required Minimum Distribution works

An RMD is a fraction of your account balance, and the fraction changes each year as you get older. The calculation uses your balance as of the end of the prior year and a distribution period, a life-expectancy figure tied to your age. The older you are, the shorter the period and the larger the share of your balance you must withdraw.

The calculator looks up the distribution period for your age and divides the balance by it. If the amount you actually withdraw is less than the required minimum, the difference can be penalized, and the tool estimates that penalty too.

The formula

RMD = account balance ÷ distribution period for your age Shortfall penalty = penalty rate × (required amount − amount withdrawn)

Why the amount changes each year

Your age shortens the distribution period every year, which pushes the required fraction of your balance up. Your balance rises or falls with markets and with your withdrawals, which moves the dollar figure the other way. Recalculate early each year with the fresh balance and your current age. Taking more than last year's figure would require does no harm, though it may not be tax-efficient; taking less can expose you to the penalty. Doing it early also gives you time to schedule the withdrawal before the deadline.

Why RMDs matter

The tax on these accounts was deferred, not waived, and the withdrawals are when that deferred tax is generally collected. Missing an RMD is an expensive mistake, because the penalty is charged on top of the tax you would owe anyway.

Points to check

If you hold several accounts, whether you can combine their RMDs depends on the account type. Not every retirement account follows the same RMD schedule, and some are treated very differently. There are specific deadlines, and the first RMD year can have its own timing rules. The starting age, the tables and the penalty have all changed over the years, so confirm the current position.

RMDs in a wider withdrawal plan

The RMD is the least you must take in a year, not a statement of what you should take. Two people with identical accounts might withdraw very different amounts depending on their other income, tax bracket and goals.

Withdrawing a little more than the minimum in lower-income years leaves a smaller balance, which means smaller required amounts later. With several accounts, the order and source of withdrawals can change your overall tax bill. Taking the distribution earlier in the year gives you more flexibility.

The result is an estimate, not an official figure. Your actual RMD depends on the current life-expectancy tables, the exact prior year-end balance and the rules for your account, so confirm the numbers with the IRS or a qualified tax professional before you act, especially where a penalty could apply.

This is general information, not financial advice.

About This RMD Calculator

Use this RMD calculator to get an instant, accurate estimate. The figures follow official IRS guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.