Required Minimum Distributions
Learn when required withdrawals begin and how they can affect taxes, Medicare, and savings.
Managing Taxes and Protecting Retirement Savings
Why RMDs matter long before they begin
A required minimum distribution, or RMD, is money the government generally requires you to take out of certain retirement accounts each year. The rule exists because contributions and investment gains in traditional retirement accounts may have gone untaxed for decades. The withdrawal is often taxable even when you do not need the money to pay bills.
The greatest planning challenge is not the withdrawal itself. It is the chain of effects that can follow: more taxable income, possible taxes on Social Security, higher Medicare premiums, less money left in tax-deferred accounts, and more financial pressure on a surviving spouse. An RMD is not automatically a bad thing. The goal is to understand its cost in the context of the entire retirement plan.
When distributions begin and which accounts are affected
Under current federal rules, the usual RMD starting age is 73 for people born from 1951 through 1959 and 75 for people born in 1960 or later. Some older birth years have different starting ages. Traditional IRAs, SEP IRAs, SIMPLE IRAs, and most traditional employer retirement plans generally have RMD rules. Designated Roth accounts in employer plans no longer require lifetime RMDs for the original owner, and Roth IRAs do not require lifetime RMDs for their original owner.
Your first RMD may generally be delayed until April 1 of the year after the year you reach your starting age. But delaying it can put two RMDs in the same calendar year, possibly increasing taxes and Medicare-related income. Later RMDs are generally due by December 31. Special rules can apply to an employer plan when someone is still working, but they do not generally postpone traditional IRA RMDs.
Each traditional IRA normally has its own calculated RMD. You can generally combine the IRA amounts and take the total from one or more of your traditional IRAs. Employer plans often have different aggregation rules. An RMD cannot be rolled over into another tax-deferred account or converted directly to a Roth. You must satisfy the year’s RMD before converting additional eligible funds.
How the annual RMD is calculated
For most owners, the prior December 31 account balance is divided by the applicable IRS life-expectancy factor. A different table may apply if the spouse is the sole beneficiary and more than ten years younger. The factor generally declines as you age, causing the required withdrawal percentage to rise.
| Illustrative calculation | Amount |
|---|---|
| Traditional IRA on prior December 31 | $1,000,000 |
| Age 75 Uniform Lifetime divisor | 24.6 |
| Annual RMD | $40,650 |
| Approximate withdrawal percentage | 4.07% |
This is a minimum, not a maximum. You may withdraw more. If the account grows despite distributions, the dollar amount of future RMDs can still rise. If it falls, the next RMD generally uses the lower year-end value. Do not assume that taking an RMD means you must spend it.
The difference between income, taxes, and spending
Consider a single retiree age 75 who receives $40,000 of Social Security and a $30,000 pension. A $1 million traditional IRA produces an RMD of about $40,650. Assume all IRA dollars are pretax and the pension is fully taxable. The retiree now has about $110,650 in cash receipts before taxes, but that is not the same as taxable income or money available to spend.
Federal tax on Social Security depends on provisional income, which generally includes adjusted gross income before Social Security, certain tax-exempt interest, and half of Social Security benefits. At these income levels, as much as 85% of the benefit may be included in taxable income. That does not mean an 85% tax rate. It means up to 85% of the benefit enters the taxable-income calculation.
| Illustrative income component | Annual amount |
|---|---|
| Pension | $30,000 |
| Traditional IRA RMD | $40,650 |
| Social Security received | $40,000 |
| Provisional income before other adjustments | $90,650 |
| Maximum Social Security included in taxable income | $34,000 |
The provisional-income illustration equals $30,000 + $40,650 + half of $40,000. Exact Social Security taxation requires the full worksheet and any other income or adjustments. Deductions then affect taxable income. State taxes, Medicare premiums, and withholding can further change the amount left for spending.
Why one withdrawal can create several costs
Federal and state income taxes
Traditional IRA withdrawals are generally taxed as ordinary income, except for any documented after-tax basis. A large RMD can fill a lower tax bracket and push some income into a higher one. Only the dollars above a bracket boundary are taxed at the higher marginal rate. A retiree may also owe state income tax depending on residence and state rules.
Taxes on Social Security
If Social Security was not already at its maximum taxable share, added IRA income can cause more of the benefit to become taxable. In some income ranges, one additional dollar of IRA income can increase taxable income by more than one dollar because it also brings more Social Security into the calculation. The exact effect stops once the maximum taxable share is reached.
Medicare IRMAA
Medicare can charge higher Part B and Part D premiums when modified adjusted gross income exceeds annual thresholds. This income-related monthly adjustment amount, called IRMAA, generally uses a tax return from two years earlier. For example, a large IRA withdrawal in one year may affect Medicare premiums two years later. IRMAA is based on thresholds, so crossing a boundary can create a noticeable jump in premiums. The exact dollar cost changes each year and depends on filing status and the tier reached.
Investment growth and future withdrawals
An RMD reduces the balance left inside the traditional IRA. But if the retiree does not need the distribution, the after-tax proceeds can often be invested in a taxable account. The money is not lost. Its future tax treatment changes. Interest, dividends, and realized gains in the taxable account may create ongoing taxes, while the remaining IRA continues growing tax-deferred.
An unneeded RMD: spending it versus reinvesting it
Suppose the $40,650 RMD is not needed. Assume, only for illustration, that its incremental combined tax cost is 22%. That leaves about $31,707 available to invest in a taxable account. If that after-tax amount earns 5% annually for ten years without any annual tax drag, it would grow to about $51,645. Real taxable-account growth could be lower because of taxes, fees, and market returns. The comparison is not between $40,650 invested and zero; it is between different account locations and different future tax obligations.
This distinction matters for heirs too. A taxable brokerage account may receive a basis adjustment at death under applicable law, while an inherited traditional IRA generally retains its income-tax character. Beneficiary rules and future tax laws can change the comparison.
RMDs and the surviving spouse
A couple may file jointly while both are alive. After one spouse dies, the survivor generally files as single in later years unless a special filing status applies. The survivor may lose one Social Security benefit, but household costs often do not fall in half. Traditional IRA assets may remain large, and RMDs may continue. The single tax brackets, deduction, and Medicare income thresholds can make the same amount of IRA income more costly.
For example, a surviving spouse may go from two Social Security checks totaling $55,000 to one survivor benefit of $35,000, while housing, insurance, and utilities remain high. If spending needs stay near $70,000, the survivor may need more portfolio withdrawals even though total income fell. Those withdrawals can raise taxes, and a market decline at the same time could force sales when account values are depressed.
Roth assets can provide flexibility because qualified withdrawals generally do not increase federal adjusted gross income. That may help a survivor cover a large expense without adding to taxable income. But Roth conversions while both spouses are alive have upfront tax costs, so the right amount and timing require a comparison.
Planning choices before and after RMDs begin
Roth conversions before the RMD years
A Roth conversion moves eligible pretax retirement money to a Roth account and generally creates taxable income in the conversion year. It may lower later traditional IRA balances and RMDs. This can be valuable during years after work ends but before Social Security and RMDs begin. The tradeoff is paying taxes earlier, possibly entering a higher bracket or triggering IRMAA. Paying conversion taxes from taxable savings can preserve more of the converted amount for Roth growth, but it also uses liquid assets.
Qualified charitable distributions
Eligible IRA owners age 70½ or older may direct qualifying IRA funds to an eligible charity as a qualified charitable distribution, or QCD. A qualifying QCD can count toward an RMD while generally being excluded from federal income. This may be more useful than taking an RMD and then making a deductible gift, especially for people who use the standard deduction. The money must be sent directly from the IRA custodian to the charity under the applicable rules. QCD annual limits are adjusted over time, and not every charity or account type qualifies.
Coordinating withdrawals across accounts
Some retirees fund spending from taxable accounts first, allowing pretax accounts to grow. Others draw pretax money earlier to reduce future RMDs. Roth accounts may be held for later years or used strategically to avoid a tax spike. No single withdrawal order is always best. The right choice depends on current and future tax brackets, investment mix, spending, capital gains, Social Security, Medicare, and the needs of a surviving spouse.
Other ways to reduce surprises
Review RMD estimates several years before the starting age. Check whether an employer plan has special rules, whether an IRA contains after-tax basis, and whether inherited accounts have separate distribution requirements. Plan tax withholding or estimated payments so the required withdrawal does not lead to an unexpected tax bill. Missed RMDs can carry an excise tax, although timely correction can reduce the penalty under current rules.
A longer view: why the lowest tax this year may not be the best plan
Imagine two retirees with identical savings. One postpones pretax withdrawals until required. The other takes measured withdrawals or makes Roth conversions during lower-income years. The second retiree may pay more taxes in the early years but face lower RMDs later. Whether this improves lifetime taxes or ending after-tax wealth depends on the actual tax rates, investment returns, years invested, and how conversion taxes are paid.
The result can also change when a spouse dies, a care expense occurs, or tax law changes. A plan should therefore compare lifetime taxes, available after-tax spending, Medicare costs, remaining account balances, and what heirs may receive. A large RMD reduction is not the same thing as an equal tax saving.
Questions to review before making a decision
- What are the projected balances in each pretax account when RMDs begin?
- How much of the RMD will be needed for living expenses, and how much can be reinvested?
- Could RMD income make more Social Security taxable or trigger an IRMAA tier?
- Would smaller earlier withdrawals or Roth conversions improve the lifetime result after upfront taxes?
- How would the plan change if one spouse died or if the market fell near retirement?
- Do charitable gifts, inherited accounts, state taxes, or after-tax IRA basis change the answer?
Final perspective
RMDs are a tax rule, not a retirement income strategy. They tell you the minimum amount that must leave certain accounts, not how much you should spend or how you should invest. Good planning starts with the income you need after taxes and then examines how RMDs affect the years ahead. Understanding the links among withdrawals, taxes, Medicare, investment growth, and surviving-spouse needs can help avoid costly surprises.
Educational illustration only. Figures are rounded and do not represent a personalized tax return or investment forecast. Federal rules, annual thresholds, and account-specific exceptions should be checked for the year in question before taking action.