RMD Calculator

Written by Great Medico

Updated September 25, 2026 •3 min read

Share Print Save

RMD Calculator is useful when you want a fast answer without losing sight of the assumptions behind it. It estimates a required minimum distribution from the retirement-account balance and the IRS-style life-expectancy table assumptions represented by age, table selection, and spouse age.

What this calculator does

RMD Calculator estimates a required minimum distribution from the retirement-account balance and the IRS-style life-expectancy table assumptions represented by age, table selection, and spouse age. The visible inputs are prior year-end account balance, age this year, irs table, and spouse age. Its result is driven by those values, so the calculation can be reproduced or stress-tested without relying on a hidden live-data feed.

How to use it

Enter Prior year-end account balance, Age this year, IRS table, and Spouse age. Keep all monetary inputs in the same currency; the currency selector formats results and does not perform foreign-exchange conversion. Keep the time period shown on the form consistent with the source value; convert it first if your source uses a different period. Choose the table and age inputs that match the scenario, then verify the applicable current IRS table before acting on the estimate. Use the labels on RMD Calculator as the source of truth and recheck any prefilled value before relying on the result.

How the calculation works

The standard arithmetic is RMD = prior year-end account balance ÷ applicable distribution-period divisor. The divisor depends on the IRS table and the account owner or beneficiary situation. RMD Calculator applies that relationship only to the inputs represented on its form. If the result looks surprising, verify the entered values, units, and signs before interpreting the number.

Example

If the applicable divisor for a particular year were 25.0 and the prior year-end balance were $500,000, the arithmetic RMD would be $20,000. The key step is using the correct official divisor for that person and year. The example is a math check for RMD Calculator; replace the sample values with your own inputs rather than treating the example as a target or recommendation.

How to interpret the result

A smaller divisor produces a larger required distribution. The calculated amount is a minimum distribution for the modeled account and table; withdrawing more is generally a separate planning decision. The number is most useful when compared with another scenario built from the same definitions.

Limitations and notes

RMD starting ages, exceptions, beneficiary rules, Roth treatment, and life-expectancy tables are legal rules that can change. Current IRS guidance generally starts owner RMDs at age 73 for affected taxpayers, but the applicable table and timing still depend on the individual situation. IRS RMD rules use official life-expectancy tables and legal starting-age rules; the applicable divisor depends on the taxpayer or beneficiary situation. Recalculate when rates, prices, balances, dates, or policy assumptions change.