Once you reach your early seventies, the IRS no longer lets your tax-deferred retirement savings sit untouched. The law requires you to withdraw a minimum amount from most retirement accounts each year — the Required Minimum Distribution, or RMD. Take too little or take it late, and the IRS can impose an excise tax of up to 25 percent of the shortfall.
An Rmd Calculator removes the guesswork. Enter your account balance as of December 31 of the prior year and your age, and it applies the divisor from the IRS Uniform Lifetime Table to produce your exact RMD, plus a monthly equivalent. The math is simple — balance divided by divisor — but the rules behind it have changed several times, and the details matter. This guide covers which accounts are affected, when RMDs begin, how the table works, deadlines, penalties, and smart withdrawal strategies.
What Is a Required Minimum Distribution?
A Required Minimum Distribution is the smallest amount federal law requires you to withdraw each year from certain tax-advantaged retirement accounts once you reach a specified age. Contributions to traditional IRAs and 401(k)s were made with pre-tax dollars, and the investment growth compounded tax-free for decades. RMDs are how the government finally collects income tax on that money, on a fixed schedule.
RMDs are taxed as ordinary income in the year you take them, stacking on top of Social Security, pensions, and other income. A large RMD can push you into a higher bracket, make more of your Social Security taxable, and raise Medicare premiums through income-related surcharges. Planning your withdrawals is therefore a tax exercise as much as a cash-flow one. Remember that the RMD is a minimum — you may always withdraw more, and you are never required to spend it. Many retirees withdraw the RMD and immediately reinvest it in a taxable brokerage account.
Which Accounts Are Subject to RMDs?
RMD rules cover nearly every type of tax-deferred retirement account. The key distinction is whether contributions went in pre-tax. If they did, the IRS almost certainly wants its share on a timetable.
Traditional IRAs, SEP IRAs, and SIMPLE IRAs
All traditional IRAs are subject to RMDs starting in the year you reach the applicable age, including SEP and SIMPLE IRAs. If you own several traditional IRAs, calculate the RMD for each separately, then withdraw the combined total from any one or any combination of them — this is the IRA aggregation rule.
Employer Plans Such as 401(k)s and 403(b)s
Workplace plans are also covered, but aggregation works differently. A 403(b) holder may aggregate RMDs across multiple 403(b) contracts, while a 401(k) participant must calculate and withdraw the RMD separately from each 401(k) plan. The still-working exception lets employees past RMD age delay distributions from their current employer’s plan until retirement, provided they own no more than 5 percent of the business. It never applies to IRAs.
Inherited Retirement Accounts
Beneficiaries face stricter rules. Under the SECURE Act, most non-spouse beneficiaries must empty an inherited IRA within ten years, and annual RMDs are also required during those ten years if the original owner had already started taking them. Spouses have more options, including treating the account as their own. Inherited Roth IRAs generally have no annual RMDs but are still subject to the ten-year rule for non-spouse beneficiaries.
The Roth IRA Exception
Roth IRAs have no RMDs during the owner’s lifetime, because contributions were made with after-tax dollars. Since 2024, Roth 401(k) accounts are exempt from pre-death RMDs as well. This distinction makes Roth conversions a popular tool for people facing large RMDs they do not need for expenses.
When Do RMDs Begin?
The starting age has moved twice, so the answer depends on your birth year. Before 2020 it was 70 and one-half; the SECURE Act raised it to 72; SECURE 2.0 raised it again in two steps.
The Age 73 and Age 75 Thresholds
If you were born between 1951 and 1959, RMDs begin at age 73. If you were born in 1960 or later, they begin at age 75. Anyone already taking RMDs under the old rules continues on their existing schedule. This calculator covers ages 72 through 120, so it works regardless of which threshold applies to you — only your age’s divisor matters.
The April 1 Required Beginning Date
Your first RMD may be delayed until April 1 of the year after you reach your starting age. Every later RMD is due by December 31. Beware the first-year trap: delaying means two RMDs become taxable in a single year, bunching up your income. Many advisers recommend taking the first RMD by December 31 of the year you reach the starting age instead.
The IRS Uniform Lifetime Table
The divisor in this calculator comes from the IRS Uniform Lifetime Table in Publication 590-B. Each age is paired with a distribution period based on joint life expectancy — the owner plus a hypothetical beneficiary ten years younger. To find your RMD, divide your prior-year-end balance by the divisor for your age.
Sample divisors show the pattern: 27.4 at age 72, 24.6 at 75, 20.2 at 80, 16.0 at 85, 12.2 at 90, 8.9 at 95, and 6.6 at 100. The full table runs from 72 to 120 and is built into this calculator.
Why the Divisor Shrinks as You Age
The divisor falls each year because remaining life expectancy shortens, forcing a larger percentage out annually. At 72 you withdraw roughly 3.65 percent; by 85 about 6.25 percent; by 95 over 11 percent. One special case: if your spouse is more than ten years younger and is your sole beneficiary, you may use the Joint and Last Survivor Table instead, which produces smaller RMDs.
How to Calculate Your RMD
- Find your prior-year-end balance — the fair market value of each covered account as of December 31 of the previous year, shown on your year-end statement and Form 5498.
- Look up your divisor — the distribution period for your age in the Uniform Lifetime Table (24.6 at age 75, for example).
- Divide balance by divisor — the result is your RMD for the current year.
Worked Example
A 75-year-old whose traditional IRA was worth 400,000 dollars on December 31 divides by 24.6, giving an RMD of about 16,260 dollars for the year — roughly 1,355 dollars per month. With a 600,000-dollar balance, the same divisor yields about 24,390 dollars. Consider also an 80-year-old with 750,000 dollars: the age-80 divisor is 20.2, so the RMD is about 37,129 dollars, or roughly 3,094 dollars per month. Notice how the shrinking divisor steadily raises the required percentage even if the balance stays flat. Enter your own numbers above for an instant result.
RMD Deadlines and the 25 Percent Excise Tax
After your first year, the full RMD must be out by December 31. Custodians are swamped in late December, and a request submitted on December 30 that settles on January 2 counts as next year’s withdrawal. Most planners finish RMDs by early December. The penalty for a shortfall is an excise tax of 25 percent of the amount not withdrawn — down from 50 percent before SECURE 2.0. Correct the mistake promptly by taking the missed distribution and filing Form 5329, and the penalty can drop to 10 percent.
What to Do If You Miss the Deadline
Act fast: take the missed distribution, report the shortfall on Form 5329, and attach a statement explaining the reasonable cause and your corrective steps. The IRS frequently waives the tax entirely for reasonable, corrected errors, but the waiver is not automatic — you must file the form and request it.
Ways to Take Your RMD
- Cash distribution: sell investments inside the account and transfer cash to your bank or brokerage.
- In-kind transfer: move shares directly to a taxable account without selling, satisfying the RMD at fair market value while staying invested.
- Installments: take monthly or quarterly chunks through the year instead of one lump sum.
- Direct to charity: send it straight to a qualified charity as a qualified charitable distribution.
Qualified Charitable Distributions
A QCD lets IRA owners aged 70 and one-half or older transfer up to 100,000 dollars per year directly from a traditional IRA to a qualified charity. The amount is excluded from taxable income and counts toward the RMD — one of the most tax-efficient ways to satisfy it. The money must go directly from custodian to charity; if it passes through your hands first, it does not qualify.
Strategies That May Reduce Future RMDs
- Roth conversions in your sixties: converting traditional IRA dollars in lower-income years shrinks the future RMD base, and converted money grows tax-free with no lifetime RMDs.
- Qualified longevity annuity contracts: a QLAC lets you exclude up to 200,000 dollars from RMD calculations until annuity payments begin, no later than age 85.
- Annual QCDs: charitable transfers permanently remove money from the IRA without adding to taxable income.
- Spend IRA dollars first: drawing living expenses from traditional accounts in early retirement naturally reduces the balances driving future RMDs.
Common RMD Mistakes to Avoid
- Missing the December 31 deadline and assuming a late-December request settles in time.
- Using the wrong balance date — the RMD uses the prior year-end balance, not the current one.
- Mixing up aggregation rules — IRA RMDs can be combined, but each 401(k) plan needs its own withdrawal.
- Ignoring inherited-account RMDs, which follow different, stricter rules.
- Doubling up income in year one by delaying the first RMD to April 1 without planning for two taxable distributions.
How RMDs Affect Social Security and Medicare Costs
Because RMDs count as ordinary income, they can raise your modified adjusted gross income in ways that spill over into other parts of your retirement finances. Up to 85 percent of your Social Security benefits become taxable once your combined income crosses certain thresholds, and a large RMD in a single year can easily push you over the line. Similarly, Medicare Part B and Part D premiums are subject to income-related monthly adjustment amounts — IRMAA — which are set using your tax return from two years earlier. A single year of outsized RMD income can therefore raise your Medicare premiums two years down the road.
This is why many retirees manage RMDs with an eye on total income, not just the withdrawal itself. Practical tactics include:
- Spreading withdrawals across the year rather than taking one lump sum, which does not change the annual total but pairs well with quarterly estimated-tax planning.
- Using QCDs to satisfy the RMD without adding a dollar to adjusted gross income, which directly protects both Social Security taxation and IRMAA tiers.
- Timing Roth conversions for years before RMDs begin, when your income — and therefore your marginal rate — is at its lowest.
None of these moves changes the RMD formula, but they change how much of the distribution the government effectively keeps. A quick run through the calculator each January, paired with a look at your projected total income, is the simplest annual habit.
Frequently Asked Questions
What exactly is an RMD?
An RMD, or Required Minimum Distribution, is the minimum amount the IRS requires you to withdraw each year from tax-deferred accounts such as traditional IRAs and 401(k)s once you reach the applicable age. Divide your prior-year-end balance by the Uniform Lifetime Table divisor for your age; the result is taxed as ordinary income.
At what age do RMDs start now?
RMDs begin at age 73 if you were born between 1951 and 1959, and at age 75 if you were born in 1960 or later, under the SECURE Act and SECURE 2.0. Anyone already taking RMDs under older rules continues on their existing schedule.
How is my RMD calculated?
Divide your account balance as of December 31 of the prior year by the IRS Uniform Lifetime Table divisor for your age. A 75-year-old with a 400,000-dollar balance divides by 24.6 for an RMD of about 16,260 dollars. The Rmd Calculator above does this instantly.
Which accounts require RMDs?
Traditional, SEP, and SIMPLE IRAs, plus 401(k)s, 403(b)s, 457(b)s, and most other tax-deferred employer plans. Roth IRAs never require lifetime RMDs, and Roth 401(k)s have been exempt since 2024. Inherited accounts follow separate beneficiary rules.
When is my RMD due each year?
Every RMD after your first is due by December 31. The first one may be delayed to April 1 of the following year, but that bunches two taxable distributions into one year, so many people take the first RMD by December 31 instead.
What happens if I miss my RMD?
You owe a 25 percent excise tax on the shortfall, plus regular income tax when you take it. Correct it promptly by taking the missed distribution and filing Form 5329 and the penalty can fall to 10 percent; the IRS often waives it entirely for reasonable, corrected mistakes.
Can I withdraw more than my RMD?
Yes — the RMD is a floor, not a ceiling. Any extra is taxed as ordinary income like the rest. Many retirees take additional withdrawals in lower-income years as deliberate tax planning.
Do RMDs apply to Roth IRAs?
No. Roth IRAs are exempt from lifetime RMDs because contributions were after-tax, and Roth 401(k)s joined them in 2024. This exemption is why Roth conversions are popular for people facing large future RMDs.
Can I aggregate RMDs across multiple accounts?
For traditional, SEP, and SIMPLE IRAs, yes — calculate each separately, then withdraw the combined total from any of them. For 401(k)s, no — each plan needs its own separate withdrawal. Multiple 403(b) contracts may be aggregated.
What is a qualified charitable distribution?
A QCD lets IRA owners age 70 and one-half or older send up to 100,000 dollars per year directly from a traditional IRA to a qualified charity. It is excluded from taxable income and counts toward the RMD, making it highly tax-efficient for charitable retirees.
Do I have to take my RMD in cash?
No. An in-kind transfer of securities to a taxable account satisfies the RMD at fair market value, and installments through the year or a direct QCD to charity also qualify. Cash is simply the most common method.
Can I still work and delay my RMD?
Possibly, through the still-working exception: employees past RMD age may delay distributions from their current employer’s plan until retirement if they own no more than 5 percent of the business. It does not apply to IRAs or former employers’ plans.
Are RMDs taxed as ordinary income?
Yes, in most cases — distributions from pre-tax accounts stack on top of your other income for the year. The only exception is the portion from after-tax or nondeductible contributions, which comes out tax-free on a pro-rata basis.
What is the Uniform Lifetime Table?
It is the IRS table in Publication 590-B assigning each age a distribution-period divisor based on joint life expectancy. The divisor shrinks yearly — 27.4 at 72, 24.6 at 75, 20.2 at 80 — so the required withdrawal percentage rises as you age.