What Is a Required Minimum Distribution?

What is a required minimum distribution?

All that money in traditional IRAs and 401(k)s went in untaxed, and the IRS never intended that deal to last forever. A required minimum distribution (RMD) is the yearly amount the government makes you withdraw (and pay income tax on) once you reach the trigger age (currently 73, moving to 75 for younger generations under current law).

The mechanics are simple: take each account’s balance on December 31st, divide by a life-expectancy factor from an IRS table, and that’s the minimum you must take out this year. For illustration, at 75 the divisor is about 24.6 (roughly 4% of the balance), and the percentage climbs every year after. See your own numbers with our RMD calculator: enter a birth year and balance, and it shows when yours start and roughly how large they grow to be.

Miss one and the penalty is steep: up to 25% of the amount you should have taken. This is not a deadline to wing.

Why do RMDs catch people off guard?

An RMD isn’t a bill. It’s forced income, and it arrives stacked on top of everything else: Social Security, pensions, interest. A $1 million IRA at 75 forces roughly $40,000 of extra taxable income whether you need it or not.

That stack has ripple effects: it can push you into a higher bracket, make more of your Social Security benefit taxable, and lift your Medicare premiums into surcharge territory (IRMAA). People who saved diligently for 40 years are often genuinely surprised to find their 70s are their highest-tax decade. The problem isn’t the saving. It’s that nobody planned the exit.

When should you start planning for RMDs?

By the time RMDs start, most of the leverage is gone. The good moves happen in the decade before:

• Roth conversions in low-income years shrink the pre-tax pile that RMDs are calculated on (see our Roth Conversions guide, the two topics are really one topic).
• Sequencing withdrawals: sometimes it’s smarter to spend IRA money in your 60s, before it’s required, precisely to flatten the later spike.
• Qualified charitable distributions (QCDs): from age 70½, you can give directly from an IRA to charity. It counts toward your RMD but never shows up in your taxable income. For people who give anyway, it’s one of the cleanest tax moves available.
• Roth accounts have no lifetime RMDs: money you’ve already converted is out of the game entirely.
• Directing new savings outside the pre-tax pile: once conventional accounts are maxed, some people fund permanent life insurance as a retirement tool instead of adding more to a pre-tax account, which keeps that money from ever generating an RMD, and can later be drawn on without stacking on top of the RMD income you do have.
• Shrinking an already-large balance before RMDs start: if a traditional IRA or 401(k) is already large enough that future RMDs are a real tax problem, taking strategic distributions in the years before RMDs begin, and directing them into permanent life insurance, permanently shrinks the balance those future RMDs get calculated on. The trade is paying tax on that income now, voluntarily, instead of a larger forced tax bill later. Our RMD calculator shows how a given balance’s required distributions grow over time.

What if RMDs have already started?

Planning options narrow, but they don’t vanish. QCDs still work every year. Timing within the year still matters. Excess RMD money you don’t need can be reinvested in a taxable account or used to fund goals you’d have funded anyway. And coordinating which accounts fund your spending still shapes what your heirs eventually inherit, and what tax bill comes with it.

The theme across all of it: RMDs are predictable years in advance. Treated early, they’re a math problem. Ignored, they’re a surprise tax bill with your name pre-printed.