Balance Trajectory & Annual RMD
Scenario A — RMD Only
Scenario B — RMD + Extra
Year-by-Year Projection
RMD = prior year-end balance ÷ IRS Uniform Lifetime Table factor for your age.
| Yr | Age | IRS Factor | RMD | Total (B) | Est. Tax (B) | Bal — A | Bal — B |
|---|
How RMDs Are Calculated
The IRS divides your prior year-end account balance by a life expectancy factor from the Uniform Lifetime Table (Publication 590-B). This factor shrinks each year as you age, meaning your required withdrawal percentage grows over time — even as your balance may be declining.
Example: A $500,000 balance at age 73 (factor 26.5) produces a Year 1 RMD of ~$18,868.
When RMDs Begin
Under the SECURE 2.0 Act, RMDs now begin at age 73 (for those born 1951–1959) and will shift to age 75 starting in 2033 (for those born 1960 or later). Missing an RMD deadline results in a 25% excise tax on the amount not withdrawn.
RMDs apply to Traditional IRAs, SEP IRAs, SIMPLE IRAs, and most employer-sponsored plans (401k, 403b, 457b). Roth IRAs are exempt during the owner's lifetime.
Strategic Withdrawal Timing
Taking more than the minimum before RMDs peak can reduce future taxable income and potentially keep you in a lower bracket. This Roth conversion strategy — moving pre-tax dollars to a Roth during lower-income years — can also reduce future RMD pressure entirely, since Roth accounts have no lifetime RMD requirement.
Tax Impact & IRMAA
RMDs count as ordinary income and can push you into a higher tax bracket, trigger taxation of Social Security benefits, or cause Medicare premium surcharges (IRMAA). Planning your withdrawal strategy around these thresholds — rather than just taking the minimum — can meaningfully reduce your lifetime tax bill.
- Higher withdrawals now → lower future RMDs
- Lower future RMDs → less bracket pressure later
- Consider qualified charitable distributions (QCDs) to satisfy RMDs tax-free