Millions of Americans spend decades building a nest egg, then hit a birthday that flips the whole thing around.
Once you turn 73, the IRS stops letting your tax-deferred accounts sit untouched.
It starts demanding a slice every single year, whether you need the cash or not.
That demand is called a required minimum distribution, or RMD.
It applies to traditional IRAs, 401(k)s, and most other workplace plans where you never paid taxes on the money going in.
The logic runs backward from how you saved: the government gave you a tax break upfront, and now it wants its cut.
Miss the deadline and the penalty is brutal.
The excise tax on a missed or short RMD is 25% of the amount you should have withdrawn, dropping to 10% if you fix it quickly.
That is on top of the income tax you still owe once you finally take the money out.
The math is less mysterious than it sounds.
The IRS publishes life expectancy tables, and you divide your account balance by a factor based on your age.
At 73, that factor is about 26.5, so a $500,000 IRA would require roughly $18,900 that year.
The percentage creeps up as you age, meaning the forced withdrawals get bigger over time.
Here is where it collides with real life.
An RMD is taxable income, and taxable income can push you into a higher bracket.
It can also inflate the portion of your Social Security benefits that gets taxed and raise your Medicare Part B and Part D premiums two years later through income-related surcharges.
Retirees who also collect a pension or work part-time feel the squeeze fastest.
The deadline is December 31 for every year after your first one.
Your very first RMD can be delayed until April 1 of the following year, but that is often a trap.
Doing it means you take two distributions in the same calendar year, doubling your taxable income and possibly your Medicare surcharge.
The practical moves are boring but effective.
If you are still working and own less than 5% of the company, a current employer's 401(k) may be exempt from RMDs until you actually retire.
Converting part of a traditional IRA to a Roth in low-income years shrinks future RMDs, though you pay tax on the conversion now.
Qualified charitable distributions let you send up to $105,000 per year straight from an IRA to charity, and that amount counts toward your RMD while staying out of your taxable income.
Each IRA has its own RMD, but you can total them and withdraw from just one account.
Workplace plans generally cannot be pooled that way.
And a surviving spouse can sometimes roll an inherited IRA into their own, which resets the rules in their favor.
The bottom line is that an RMD is not a suggestion or a planning option.
It is a scheduled tax bill attached to your savings, and the only real control you have is how early you plan for it.
Final Thoughts
Check your age, check your balance, and check your bracket before December sneaks up.