Mandatory withdrawal from retirement accounts is the US tax rule better known as required minimum distributions, or RMDs. The government lets your retirement savings grow tax-deferred for decades — but eventually it wants its share of the tax. Once you reach 73, you generally have to start taking a minimum amount out of traditional-style retirement accounts every single year. Ignore the rule, and the penalties are severe.
What a mandatory withdrawal actually means
An RMD is the smallest amount you must withdraw from your account each year. The IRS is clear: you cannot keep retirement funds in your account indefinitely. You may always withdraw more than the minimum, but you may not withdraw less. The rules apply to original account holders and, after the owner’s death, to their beneficiaries as well. You are not required to take withdrawals from Roth IRAs — or from designated Roth accounts in a 401(k) or 403(b) — while you are alive, although beneficiaries of Roth accounts are still subject to the distribution rules.
Which accounts the rules cover
The minimum distribution rules apply to traditional IRAs, SEP IRAs, SIMPLE IRAs, 401(k) plans, 403(b) plans, 457(b) plans, profit-sharing plans, and other defined contribution plans. Each employer’s plan is treated separately: the IRS notes that an RMD taken from your IRA does not count toward the RMD you owe from your 401(k), and vice versa. This is a common tripwire for people who hold several old workplace plans and assume one big withdrawal covers everything.
How your RMD is calculated
The required minimum distribution for any year is the account balance as of the end of the immediately preceding calendar year, divided by a distribution period taken from the IRS’s Uniform Lifetime Table. A different table applies if your sole beneficiary is a spouse who is more than ten years younger than you. The practical takeaway: your RMD grows as a percentage of your balance as you age, because the IRS’s life-expectancy factor shrinks each year. Keep your year-end statements, because that 31 December balance is the number everything is based on.
Key deadlines to remember
For IRAs, including SEP and SIMPLE IRAs, your first RMD is due by 1 April of the year after the calendar year in which you reach 73. For a 401(k), profit-sharing, 403(b), or other defined contribution plan, the deadline is generally 1 April following the later of the year you reach 73 or the year you retire — but only if your plan allows you to delay until retirement, so check the plan document. Every RMD after the first is due by 31 December. Note the trap: if you delay your first RMD to the following April, you will take two distributions in the same tax year, which can push you into a higher bracket.
What happens if you miss one
If you take no distribution, or the distribution is too small, you may owe a 25% excise tax on the amount you failed to withdraw. The IRS reduces this to 10% if you correct the shortfall within two years, and the tax is reported on Form 5329. On a missed $20,000 RMD, that is a $5,000 penalty for doing nothing — a painful lesson that is entirely avoidable with a calendar reminder and a ten-minute calculation each December.
How RMDs are taxed
Withdrawals are included in your taxable income for the year, except for any part that was already taxed (your basis) or that can be received tax-free, such as qualified distributions from designated Roth accounts. This is why the order you tap accounts matters so much in retirement: drawing first from taxable accounts while letting tax-advantaged money compound can be far more efficient. Our guide to the advantages of investing in taxable accounts explains the thinking behind smart withdrawal sequencing.
Planning around mandatory withdrawals
A few habits make RMDs painless rather than perilous. First, automate the calculation and withdrawal with your custodian each December — most brokers will compute and distribute your RMD for free. Second, coordinate across accounts so you do not accidentally double-count or miss a plan. Third, review your beneficiary designations regularly, since they determine which life-expectancy table you use. Finally, fold RMDs into your broader plan: building your first monthly budget in retirement helps you see exactly where those forced withdrawals will go, and reviewing what life insurance is and whether you need it keeps your estate wishes aligned with the money coming out. The IRS page on required minimum distributions remains the authoritative reference for the current rules.
Mandatory withdrawal rules are not optional, negotiable, or worth gambling on. Understand your accounts, mark your deadlines, take the minimum on time — and let the rest of your money keep working for you.