How it works
A required minimum distribution is the IRS-mandated withdrawal from traditional retirement accounts beginning in your seventies - currently age 73 for those born 1951-1959 and 75 thereafter - calculated each year by dividing the prior December 31st balance by a life-expectancy factor from the IRS Uniform Lifetime Table. The first RMD catches retirees off guard twice: it is often larger than expected (about 4% of the account at 76), and it arrives as taxable ordinary income whether or not the money is needed. This calculator runs the divisor arithmetic, estimates tax at your combined rate, and converts the remainder into the only form budgets understand - net dollars per month - then compares that against your stated spending goal and projects the year-end balance assuming returns and mid-year withdrawals. The planning insight most first-timers miss is that an unneeded RMD is not wasted money but a redirection decision: sweep it to taxable investing, Roth conversions' cousins like QCDs if charitable, or simply next year's living costs so portfolio withdrawals shrink elsewhere. Divisor values below follow the IRS Uniform Lifetime Table; rules and ages have changed before and can change again, so confirm current requirements at IRS.gov or with a tax professional before setting withdrawals.
Formula
RMD = prior Dec 31 balance / Uniform Lifetime Table divisor | net = RMD x (1 - tax rate) | monthly = net / 12 | year-end = balance x (1 + return) - RMD x (1 + return/2)
Tips
- Withdraw evenly across the year or take one lump - timing flexibility is yours; completing the RMD is not.
- Direct unwanted RMDs to charity via QCDs after 70.5 - they satisfy the requirement while skipping taxable income.
- Missing a deadline costs a steep excise tax on the shortfall, among the harshest penalties in the code.
- Multiple accounts? IRAs may aggregate the calculation, but 401(k)s must be withdrawn per-plan.
- Revisit withholding each January - a bigger RMD without bigger withholding sets up an April surprise.
Frequently asked questions
- How is the first RMD calculated?
- Take the account balance from the previous December 31st and divide by the IRS Uniform Lifetime Table factor for your age this year - about 23.7 at age 76, meaning roughly 4.2% comes out. On $780,000 that implies near $33,000 of mandatory taxable withdrawal.
- What age do RMDs start?
- Currently 73 for people born 1951 through 1959 and 75 for those born in 1960 or later, following SECURE 2.0's phase-in. The starting age has moved twice in recent years and could move again, so verify your specific year rather than relying on older guidance.
- Do I pay taxes on my entire RMD?
- The full distribution is ordinary income in the year received - no capital gains treatment applies inside traditional accounts. Most retirees set withholding at roughly their marginal rate; on an illustrative 18% combined rate, a $33,000 RMD leaves about $27,000 of spendable cash.
- What happens if I miss my RMD deadline?
- The shortfall faces a steep IRS excise tax - historically 50%, reduced to 25% (and further to 10% if corrected quickly) under SECURE 2.0 - plus the distribution itself remains taxable. Deadlines are December 31st annually, except the very first RMD, which may defer to April 1st of the following year.
- What should I do with RMD money I don't need?
- Redirect rather than resent it: reinvest in a taxable brokerage account, fund gifts within annual exclusions, cover next year's insurance premiums, or route to charity through qualified charitable distributions which bypass taxable income entirely when sent directly from the IRA after age 70.5.