Working past traditional retirement age means managing three systems at once: Social Security (the earnings test can withhold benefits before full retirement age, while delaying to 70 earns 8% per year), Medicare (enrollment deadlines depend on employer coverage), and required minimum distributions (the still-working exception can defer 401(k) RMDs, but never IRA RMDs).
For most FatFIRE readers, working past 65 is a choice rather than a necessity. That changes the math completely. When the paycheck is optional, the question is no longer "can I afford to stop" but "does this income create more value than the tax and benefit complications it triggers." This guide walks through each system with 2026 numbers.
Key takeaways
- Full retirement age (FRA) is 67 for anyone born in 1960 or later. Claiming Social Security at 62 permanently reduces your benefit; waiting past FRA earns delayed retirement credits of 8% per year until age 70.
- The earnings test only bites before FRA. In 2026, Social Security withholds $1 of benefits for every $2 you earn above $24,480 if you are under FRA all year. Withheld benefits are not lost; SSA recalculates your benefit upward at FRA to credit back the withheld months.
- Only earned income counts. Wages and self-employment income trigger the earnings test. Dividends, capital gains, rental income, and portfolio withdrawals do not, which is why the test rarely touches a FatFIRE retiree who is not consulting.
- Medicare has its own clock. If you work past 65 with group coverage from an employer with 20 or more employees, you can delay Part B without penalty, then use an 8-month special enrollment period after employment ends. COBRA does not count as employer coverage.
- The still-working exception defers 401(k) RMDs but never IRA RMDs, and it is unavailable to anyone who owns more than 5% of the employer.
- Catch-up contributions are substantial in 2026: $8,000 on top of the $24,500 employee limit at age 50+, and $11,250 at ages 60 through 63.
Social Security: the earnings test and the delay decision
Full retirement age is 67 for everyone born in 1960 or later. You can claim as early as 62 at a permanently reduced benefit, or delay past FRA and earn delayed retirement credits worth two-thirds of 1% per month, which is 8% per year, until the credits stop at age 70. Delaying from 67 to 70 raises the monthly check by 24%, guaranteed and inflation-adjusted for life.
How the 2026 earnings test works
If you claim benefits before FRA and keep working, the retirement earnings test applies. Here are the 2026 numbers from the SSA cost-of-living adjustment fact sheet:
| Situation in 2026 | Earnings limit | Withholding above the limit |
|---|---|---|
| Under FRA for the entire year | $24,480 | $1 withheld per $2 earned above the limit |
| Reaching FRA during 2026 (months before FRA only) | $65,160 | $1 withheld per $3 earned above the limit |
| At or above FRA all year | No limit | Nothing withheld |
Two details matter more than the headline numbers.
First, withheld benefits are not lost. When you reach FRA, SSA recalculates your benefit and removes the early-claiming reduction for every month in which benefits were fully withheld. You get the money back as a permanently higher check. The earnings test is a deferral mechanism, not a tax, though the cash-flow interruption still surprises people who claimed at 62 and then took a consulting contract.
Second, only earned income counts. The test looks at gross wages and net self-employment earnings. It ignores dividends, interest, capital gains, rental income, pension payments, annuities, and IRA or 401(k) withdrawals. A retiree living on a portfolio, following something like the withdrawal sequence in our Vanguard withdrawal guide, can claim at 62 with zero earnings-test exposure. The test only becomes relevant when real work income shows up.
Should you claim while still working?
Usually not, if you are under FRA and earning meaningful money. Two forces push the same direction: the earnings test will withhold much of the benefit anyway, and every year of delay buys an 8% larger check. For a high earner, there is a third force. Up to 85% of Social Security benefits are taxable at ordinary rates once income is above modest thresholds, so benefits claimed during high-earning years arrive pre-shrunk. The common FatFIRE pattern is to let consulting or board income carry the years from 62 to 70, claim at 70, and treat the maxed-out benefit as longevity insurance.
One quiet bonus of continued work: your benefit is computed from your highest 35 years of indexed earnings. If you are still earning at a level that displaces a low or zero year from early in your career, SSA recomputes your benefit upward automatically.
Medicare: the deadline that does not care about your job title
Medicare eligibility starts at 65 regardless of when you retire, and the enrollment rules depend on the size of your employer.
If you work past 65 with group health coverage from an employer with 20 or more employees, that coverage stays primary and you can delay Part B without any late enrollment penalty. Many people in this position enroll in premium-free Part A anyway and skip Part B while working. When employment or the coverage ends (whichever comes first), an 8-month special enrollment period opens for Part B. Miss it and you face the general enrollment period plus a lifetime penalty of 10% of the Part B premium for each 12-month period you went without coverage.
If the employer has fewer than 20 employees, Medicare becomes primary at 65 and you generally need to enroll on time, because the group plan can refuse to pay claims Medicare would have covered.
Three traps for the working-past-65 crowd:
- COBRA and retiree coverage do not count as current employer coverage. The 8-month special enrollment clock starts when active employment ends, not when COBRA ends. Riding COBRA for 18 months and then enrolling in Part B is a classic penalty-generating mistake.
- HSA contributions must stop before Medicare starts. Part A enrollment can be retroactive up to 6 months (though not earlier than the month you turned 65), and HSA contributions made during retroactively covered months trigger excise tax problems. If you plan to enroll, stop HSA contributions at least 6 months ahead.
- IRMAA is priced off your tax return from two years earlier. The standard Medicare Part B premium is $202.90 per month in 2026. IRMAA surcharges begin at $109,000 MAGI (single) / $218,000 (married filing jointly) in 2026. The top IRMAA tier ($500,000+ single / $750,000+ joint MAGI) pays $689.90 per month for Part B plus up to $91.00 for Part D in 2026, roughly $6,936 per person per year above the standard premium. A big consulting year at 63 shows up as a Medicare surcharge at 65. If your income drops after a work stoppage, file form SSA-44 to request a redetermination based on the life-changing event.
RMDs and the still-working exception
Required minimum distributions begin at age 73 for people born 1951-1959 and at age 75 for people born in 1960 or later; IRS proposed regulations (July 2024) resolve the 1959 drafting ambiguity at 73.
If you are still employed when you hit RMD age, the still-working exception lets you defer RMDs from your current employer's 401(k) until April 1 of the year after you retire. The boundaries are strict:
- It covers only the current employer's plan. Old 401(k)s at former employers still owe RMDs on schedule, unless you roll them into the current plan (many plans accept roll-ins, and consolidating for this reason is a legitimate strategy).
- It never applies to IRAs, including SEP and SIMPLE IRAs. IRA RMDs run on the normal schedule no matter how much you work.
- It is unavailable to more-than-5% owners of the business sponsoring the plan. The self-employed consultant with a solo 401(k) owns 100% of the business, so this exception does nothing for the most common FatFIRE work arrangement.
- The plan must actually permit it; most large-employer plans do, but check.
Catch-up contributions: the accumulation side
Working past 60 also means the biggest contribution room of your life. For 2026, the employee deferral limit for 401(k), 403(b), and governmental 457 plans is $24,500. The catch-up for age 50 and over is $8,000, and under SECURE 2.0 a higher catch-up of $11,250 applies at ages 60 through 63. That is $35,750 of employee deferrals at ages 60 to 63, before any employer contribution. One SECURE 2.0 wrinkle now in effect: if your prior-year wages from the employer exceeded $145,000 (indexed), catch-up contributions must go into a Roth account, which for high earners quietly converts the catch-up into a Roth contribution. How much of this room you should actually use depends on where the money sits in your broader savings and investment plan.
Decision matrix by age band
| Age band | Social Security | Medicare | Retirement accounts |
|---|---|---|---|
| 62 to 64 | Eligible to claim, but earnings test applies ($24,480 limit in 2026, $1 withheld per $2 over). Delaying usually wins if you have work income. | Not yet eligible. Bridge with employer coverage, ACA, or COBRA. | Penalty-free withdrawals after 59 1/2. Max catch-ups. Watch how work income crowds out low-bracket Roth conversion space. |
| 65 to 66 | Still under FRA; higher earnings-test limit applies only in the calendar year you reach FRA ($65,160 in 2026, months before FRA). | Eligibility begins. With 20+ employee group coverage, Part B can wait penalty-free. Stop HSA contributions 6 months before enrolling. IRMAA lookback is already watching this year's income. | Same as above; $11,250 catch-up window runs through the year you turn 63, then reverts to $8,000. |
| 67 to 69 | At FRA: earnings test gone, work income no longer withholds anything. Each year of delay still adds 8%. | On Medicare or on group coverage. Every dollar of work income feeds the IRMAA calculation two years out. | RMDs not yet due (age 73/75). Prime years for Roth conversions if work income is modest. |
| 70+ | Claim now. Delayed retirement credits stop at 70; waiting longer has zero benefit. | Same as above. | RMD age approaches. Still-working exception can defer the current employer's 401(k) only; IRA RMDs and old 401(k)s run on schedule. |
The FIRE angle: when work is optional
Most retirement-age content assumes the paycheck is load-bearing. For a portfolio-funded retiree, the calculus inverts, and continued work carries a real tax drag that deserves honest accounting:
- Consulting income stacks on top of portfolio income at your marginal rate, plus self-employment tax on the first tranche. A $100,000 consulting engagement for someone already living on $150,000 of portfolio income is taxed from the first dollar at a high marginal rate.
- It crowds out low-bracket space. The years between retirement and RMDs are prime territory for Roth conversions and 0% capital gains harvesting. Work income consumes exactly the bracket space those strategies need.
- It feeds IRMAA two years forward, and can push you across the surcharge cliff at $109,000/$218,000 MAGI.
- It can pull Social Security taxation to the maximum 85% inclusion if you claimed early.
None of that means do not work. It means price the work honestly: a $100,000 engagement might net $50,000 after federal and state tax, self-employment tax, and the option value of the Roth conversion space it consumed. If the work is genuinely energizing, that is still a fine trade. If you are grinding through it because stopping feels unsafe, run your withdrawal numbers again; our retirement planning hub covers safe withdrawal rates and the sequencing decisions that make the paycheck truly optional.
The cleanest structures for optional work in this phase: deferring income into a solo 401(k) (remembering the RMD still-working exception will not apply to it), timing engagements into calendar years when they do the least IRMAA damage, and keeping earned income at zero in years earmarked for large Roth conversions.
Bottom line
Working past retirement age is three separate administrative problems wearing one trench coat. Social Security rewards delay at 8% per year to 70 and forgives the earnings test at FRA. Medicare punishes missed enrollment windows and quietly bills your income from two years ago. RMDs wait for no one on the IRA side, whatever your employment status. Get the sequencing right, and the decision to keep working can rest where it belongs: on whether the work itself is worth your time.