RMD Calculator (Required Minimum Distribution)

Overview

How to use this calculator

1. Look up your prior year-end balance for each retirement account subject to RMDs (for example, traditional IRAs, SEP IRAs, SIMPLE IRAs, and most employer plans). If you want to see a per-account RMD, run the calculator separately for each balance.
2. Find the IRS distribution factor for your current age using the appropriate table (Uniform Lifetime Table for most owners; Joint Life and Last Survivor if your spouse is more than 10 years younger and is your sole beneficiary).
3. Enter the prior year-end balance, your age, and the corresponding distribution factor into the calculator.
4. Review the computed RMD amount for the year and confirm that the factor shown by the calculator matches the table or worksheet you used.
5. If you have multiple IRAs, you can sum the RMDs and take the total from any one or combination of your IRAs; for employer plans, RMDs are generally calculated and taken separately from each plan.
6. Use the resulting RMD amount to plan your withdrawal timing, tax withholding, or qualified charitable distributions (QCDs) if you’re charitably inclined.

Inputs explained

Account balance

The prior year-end balance of the retirement account you are calculating an RMD for. Use the value reported on your December 31 statement for that account (traditional IRA, SEP IRA, SIMPLE IRA, or employer plan subject to RMD rules).

Age this year

Your age as of the end of the current calendar year, which determines which row of the IRS RMD table applies. The required beginning age and table structure have changed in recent years, so always verify which table and age rules apply for the current tax year.

Distribution factor

The life expectancy factor from the applicable IRS RMD table for your age. Most account owners use the Uniform Lifetime Table; if your spouse is your sole beneficiary and more than 10 years younger, you may use the Joint Life and Last Survivor Table, which typically produces larger factors (and smaller RMDs).

Outputs explained

Required minimum distribution

The minimum amount the IRS requires you to withdraw for the year from the account you modeled, based on your prior year-end balance and the distribution factor you entered.

Distribution factor used

The factor that the calculator used in the RMD formula. This is echoed back from your input so you can confirm you’re using the right table and age row.

When to use it

• Planning retirement income for the year by estimating how much you’ll be forced to withdraw from tax-deferred accounts under RMD rules.
• Estimating the tax impact of RMDs on your adjusted gross income (AGI), including potential effects on Social Security taxation, Medicare IRMAA surcharges, and state tax brackets.
• Comparing different withdrawal strategies, such as taking the RMD as a lump sum late in the year versus spreading withdrawals across the year in monthly or quarterly payments.
• Coordinating qualified charitable distributions (QCDs) from IRAs with your RMD amount so that part or all of your RMD can be satisfied directly by charitable gifts (subject to QCD rules and limits).
• Testing the effect of future balances and ages on RMD amounts by plugging in hypothetical account values or projected growth and the corresponding future factors.

Tips & cautions

• Always use the most current IRS RMD tables and rules. RMD ages and life expectancy factors have changed in recent years, and future legislation could change them again.
• If you hold multiple traditional IRAs, you can compute each account’s RMD separately, then add them together and take the combined amount from any one or more of your IRAs. Employer plan RMDs generally must be taken from each plan separately.
• Consider withholding federal and state income taxes from your RMDs directly through your custodian to avoid large tax bills at filing time; many custodians can apply a percentage withholding you choose.
• If you don’t need the RMD funds for living expenses, you can still reinvest the after-tax proceeds in a taxable brokerage account, use them for Roth conversions in other years, or direct them as QCDs if eligible.
• Keep good records of RMDs taken, especially if you have inherited IRAs or multiple custodians; the IRS can ask for proof that you’ve satisfied the required minimums.
• This calculator does not automatically look up distribution factors or determine which IRS table you must use; you must supply the correct factor for your situation.
• It assumes a single account and does not aggregate multiple account balances or model complex situations such as inherited IRAs with their own RMD schedules.
• It does not handle special rules for first-year RMDs (delayed first distributions), inherited accounts, or situations where you are still working and can delay certain employer plan RMDs.
• Roth IRAs owned by the original owner generally do not have lifetime RMDs; this tool focuses on accounts where RMD rules apply.
• The RMD amount computed here is an estimate based solely on the inputs you provide. Your custodian’s official RMD notice or tax advisor’s calculations should be considered authoritative for compliance.

Worked examples

Deep dive

FAQs

Which IRS RMD table should I use for my factor?

Most retirement account owners use the Uniform Lifetime Table. If your spouse is your sole beneficiary and more than 10 years younger, you may be able to use the Joint Life and Last Survivor Table instead, which usually results in larger factors and smaller RMDs. Inherited accounts generally follow different tables and rules. Check current IRS guidance or consult a tax professional to be sure.

Can I aggregate RMDs across accounts?

You can aggregate RMDs across your own traditional IRAs (including SEP and SIMPLE IRAs) and take the total from one or more of those IRAs. Employer plan RMDs—like those from 401(k) or 403(b) plans—generally must be calculated and taken separately from each plan. The calculator works on a per-account basis; aggregation rules are applied when you decide where to withdraw.

Are Roth IRAs subject to RMDs?

Roth IRAs generally do not have lifetime RMDs for the original owner, but inherited Roth IRAs often do have distribution requirements. This calculator is geared toward traditional tax-deferred accounts where the owner must take RMDs; always check specific rules for inherited Roths.

What happens if I miss an RMD or withdraw too little?

Failing to take the full RMD used to trigger a significant excise tax on the shortfall. Recent law changes have reduced and modified the penalty and provide some relief when errors are corrected in a timely way, but the stakes are still high. If you think you have missed an RMD, contact your custodian and a tax professional quickly to discuss catch-up distributions and possible relief procedures.

Does this calculator account for taxes owed on the RMD?

No. It only computes the required minimum distribution amount based on your balance and factor. The RMD itself is generally taxable income (subject to your tax bracket, deductions, and other factors). You can use the output as input to a separate tax or marginal rate calculator to estimate the actual tax dollars due.

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