RMD Calculator

RMD Calculator — guide & how to use

Not tax advice. This tool produces an estimate for educational purposes only. It uses the IRS Uniform Lifetime Table as revised effective 2022 (the longer life-expectancy / lower-RMD version, current for the 2025 and 2026 distribution years per IRS Pub 590-B). It applies only to original account owners whose sole beneficiary is not a spouse more than 10 years younger. The Joint Life table (smaller RMD) and the Single Life table (inherited accounts) are separate and not the default here. Confirm with a CPA, tax advisor, or the IRS before relying on it. All math runs in your browser — nothing is sent anywhere.

What it does

This calculator answers the question every retiree at 73+ asks: exactly how much must I withdraw this year? From your prior December 31 balance and the age you turn this year it divides by the correct IRS Uniform Lifetime Table factor, applies the SECURE 2.0 starting-age rules (so you see $0 before you're required), shows your effective withdrawal rate, the deadline, the penalty for under-withdrawing, an optional tax estimate, and the IRA-vs-401(k) aggregation rules.

How to use it

1. Enter your prior year-end balance — the fair-market value on December 31 of last year. For a 2026 RMD, use the 12/31/2025 value.
2. Enter the age you turn this calendar year and your birth year (which sets whether your start age is 73 or 75).
3. Pick your account type. Optionally add a marginal tax rate, and flag a much-younger spouse beneficiary if applicable.

A worked example

Suppose you turn 73 this year (born 1953), your traditional IRA was worth $500,000 on December 31 last year, and your estimated marginal tax rate is 22%:

• Uniform Lifetime factor at age 73: 26.5.
• RMD: $500,000 ÷ 26.5 = $18,867.92 (displayed rounded to $18,868).
• Effective withdrawal rate: 1 ÷ 26.5 = 3.77% of the account.
• Estimated tax at 22%: $18,868 × 0.22 ≈ $4,151 set aside for taxes.
• Deadline: because age 73 is your first RMD year, you may defer it to April 1 of next year — but then a second RMD is also due by December 31 of that same year, stacking two taxable withdrawals. Every later year's RMD is due by December 31.
• If you withdrew nothing: the missed-RMD penalty would be 25% × $18,868 ≈ $4,717 (dropping to 10% if corrected within two years).

Numbers are illustrative and rounded for display; the tool keeps full precision internally and shows cents in the breakdown.

How the math works

• Core formula: RMD = PriorYearEndBalance ÷ DistributionPeriodFactor(age), using the IRS Uniform Lifetime Table (2022 revision). The headline is rounded to the nearest dollar; cents appear in the breakdown.
• Starting age (SECURE 2.0): born 1951–1959 → first RMD at 73; born 1960 or later → 75; born 1950 or earlier → already under the legacy 70½/72 rules. Below your start age, the RMD is $0 and no factor is looked up.
• Effective withdrawal rate: (1 ÷ factor) × 100 — e.g. age 73 → 3.77%.
• Penalty: a missed or short RMD incurs a 25% excise tax on the shortfall, reduced to 10% if corrected within two years.
• Optional tax estimate: RMD × (marginalRate ÷ 100) — a rough convenience figure only.
• Age 120+ caps at the table's final factor of 2.0. The factor is never below 2.0, and the division is guarded so a blank or zero balance returns $0, never NaN or Infinity.

The IRS Uniform Lifetime Table (2022 revision)

Accuracy notes & assumptions

• Estimate, not tax advice. Confirm with a CPA, tax advisor, or the IRS before relying on it.
• Uses the post-2021 Uniform Lifetime Table (longer life expectancies, lower RMDs than the pre-2022 table). These factors are current for the 2025 and 2026 distribution years per IRS Pub 590-B.
• Original owners only. The Uniform table applies when the sole beneficiary is not a spouse more than 10 years younger. A much-younger-spouse sole beneficiary uses the Joint Life table (smaller RMD); inherited accounts use the Single Life table and the 10-year rule — neither is computed here.
• Birth year drives the start age (73 for 1951–1959, 75 for 1960+). The missed-RMD penalty is 25%, dropping to 10% if corrected within two years.
• Use the prior December 31 balance, not the current balance — the most common source of error.
• IRAs aggregate; employer plans generally do not. The tool computes a per-account figure and explains aggregation rather than assuming it.
• The tax estimate is a rough flat-rate convenience. Actual tax depends on total income, brackets, IRMAA, and state rules.

Common mistakes this tool helps you avoid

• Using the current balance instead of the prior December 31 balance.
• Using the pre-2022 (old) Uniform Lifetime Table factors, which overstate the RMD.
• Applying the Uniform table when a sole-beneficiary spouse is more than 10 years younger.
• Aggregating 401(k) accounts the way IRAs can be aggregated — each plan needs its own RMD.
• Forgetting that deferring the first RMD to April 1 stacks two taxable RMDs into one calendar year.
• Assuming Roth IRAs (or, post-2024, Roth 401(k)s) require RMDs for the original owner — they do not.
• Believing the penalty is still 50% — SECURE 2.0 cut it to 25% (10% if corrected timely).

How to embed this tool on your website

No account, no coding. Copy the embed code and paste it where you want it to appear:

<iframe src="https://snaptoolsuite.com/rmd-calculator/?embed=1"
  style="width:100%;max-width:560px;height:900px;border:0;"
  title="RMD Calculator" loading="lazy"></iframe>
<p>Free <a href="https://snaptoolsuite.com/rmd-calculator/">RMD Calculator</a> by Snap Tool Suite</p>

Frequently asked questions

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