Retire at 55: the last 401(k) opens, Medicare is ten years away
Leaving your job in the year you turn 55 changes the shape of early retirement: the 401(k) of that employer can pay you without the 10 % additional tax, even though 59½ is still 4.5 years off.
Retiring at 55
it works
Savings then: $2,469,267, against $1,614,125 needed with tax and health.
| FIRE number, tax and health included | $1,614,125 |
| Plain 25× number | $1,500,000 |
| Savings at that age | $2,469,267 |
| 10 % penalties in the bridge | $0 |
| Rule of 55 on the last 401(k) | yes |
Social Security is left out: count it as a margin, not as income. Not personal financial advice.
| Age | Spending + health | Taken from | Tax | 10 % | Left in total |
|---|---|---|---|---|---|
| 55 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,522,170 |
| 56 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,577,719 |
| 57 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,636,045 |
| 58 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,697,287 |
| 59 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,761,591 |
| 60 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,829,111 |
| 61 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,900,006 |
| 62 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $2,974,447 |
| 63 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $3,052,609 |
| 64 | $67,200 | 401(k) of last employer $16,100 · Taxable account $51,100 | $0 | $0 | $3,134,680 |
Worked out by Radif Partners · How we calculate · figures read on irs.gov and healthcare.gov · not personal financial advice
Retiring at 55 is the earliest age at which the largest account most savers have, the 401(k) of their current employer, pays out without the 10 % additional tax: the rule of 55 covers a separation from service in or after the calendar year you reach 55. That leaves 4.5 years until 59½, when IRAs and older plans open too, and 10 years until Medicare at 65, which is the longer and often the costlier gap. Take a single saver of 47 with $850,000, mostly in the current 401(k), saving $35,000 a year for $56,000 of yearly spending and $7,200 of premiums. The engine projects $1,590,056 at 55 against $1,553,655 needed once tax and health are added, and funds every year from 55 to 59½ without any penalty. Leaving one year earlier, at 54, the same plan pays $22,658 of penalty.
The calendar year is the test, not the birthday
The exception in the tax code reads on the year: a separation from service "during or after the year" you reach 55 (IRS exceptions table). Someone born in November can leave in February of the year of the 55th birthday and qualify, still 54 on the last day of work. Leaving in December of the previous year does not qualify, and turning 55 later does not repair it. Publication 575 adds that the exception covers only the plan of the employer you leave (Publication 575). A traditional IRA, a rollover IRA and the 401(k) of an earlier job stay locked until 59½.
Born in 1979: does a 2034 exit count?
Rule of 55 applies: no 10 %
$3,000 saved
| Federal income tax on it | $1,420 |
| 10 % additional tax | $0 |
| 20 % withheld by the plan | $6,000 |
| You keep (federal only) | $28,580 |
A plan built around the last 401(k)
Return to the saver of 47. Of the $850,000 saved today, $650,000 sits in the 401(k) of the current employer, $90,000 in an IRA, $60,000 in a brokerage account and $50,000 in a Roth IRA, of which $35,000 are contributions. New savings go $24,500 to the 401(k), $7,500 to the Roth and $3,000 to the brokerage account. With a 5 % return after inflation, the plain rule of 25 times spending is met at 54; the plan with tax, premiums and access rules works from 55.
| Age | Taken from | Federal tax | 10 % |
|---|---|---|---|
| 55 | 401(k) of last employer $16,100; Taxable account $47,100 | $0 | $0 |
| 56 | 401(k) of last employer $16,100; Taxable account $47,100 | $0 | $0 |
| 57 | 401(k) of last employer $16,100; Taxable account $27,935; Roth contributions $19,165 | $0 | $0 |
| 58 | 401(k) of last employer $16,100; Roth contributions $47,100 | $0 | $0 |
| 59 | 401(k) of last employer $36,688; Roth contributions $28,735 | $2,223 | $0 |
Look at the 401(k) line. From 55 to 58 it pays exactly $16,100 a year, the 2026 single standard deduction (Rev. Proc. 2025-32): ordinary income with no tax on it and, thanks to the rule of 55, no penalty either. The rest of the budget comes from the brokerage account and then from Roth contributions, which add almost no taxable income. The gains part of the first year's sale, about $18,840, lands in the 0 % band for long-term capital gains, so the federal tax column stays at $0. The IRA is not touched at all before 59½. The 401(k) keeps compounding and becomes the main source afterwards.
Gains on top of a 401(k) payout that fills the deduction
Tax on your gains
$0
| Taxable ordinary income | $0 |
| Taxable gains | $18,840 |
| Tax on ordinary income | $0 |
| Top of the 0 % band (taxable income) | $49,450 |
The year of age 59 shows the hand-off. The Roth contributions are nearly spent, so the 401(k) pays $36,688 and the tax rises to $2,223. From 60 the IRA opens as well and the engine draws pre-tax money first: $69,705 from the 401(k) at 60, for $6,505 of federal tax. The bridge years were cheap precisely because the brokerage account and the Roth took the load while the deduction absorbed the 401(k) payouts; after 59½ the pre-tax balance takes over and the tax bill becomes a normal one. A state income tax, which you can add in the calculator, would apply to the 401(k) payouts and to the gains.
Four and a half years to 59½, ten years to Medicare
The access gap closes at 59½; the health gap does not close until 65. Between 55 and 65 the saver buys coverage for 10 years, $72,000 at $7,200 a year, which the engine counts as $58,376 in today's money because the later premiums are paid from savings that keep earning in the meantime. COBRA keeps the employer plan for up to 18 months at up to 102 % of its full cost (Department of Labor). After that comes a Marketplace plan, where the premium tax credit depends on income, and the bridge above keeps taxable income low on purpose. The health insurance page and the COBRA comparison take it further.
Leaving at 54 instead
Run the same saver with an exit one year earlier. The rule of 55 no longer applies to the 401(k), since the separation happens in the year of the 54th birthday. The brokerage account and Roth contributions carry the budget for a few years, then run out at 57. From there to 59½ the engine has to draw on the IRA and the 401(k) with the 10 % additional tax, $22,658 in all, on top of a higher income tax bill. One year of difference in the exit date costs more than many people save in a year.
| Age | Taken from | Federal tax | 10 % |
|---|---|---|---|
| 54 | Taxable account $63,200 | $0 | $0 |
| 55 | Taxable account $47,935; Roth contributions $15,265 | $0 | $0 |
| 56 | Roth contributions $63,200 | $0 | $0 |
| 57 | Roth contributions $9,035; IRA and old plans $66,670 | $5,837 | $6,667 |
| 58 | IRA and old plans $79,956 | $8,760 | $7,996 |
| 59 | IRA and old plans $4,170; 401(k) of last employer $75,786 | $8,760 | $7,996 |
Moves to make before the last day
The rule rewards what sits in the plan on the day you leave. An IRA or an old 401(k) can often be rolled into the current plan while you still work there, if the plan accepts incoming rollovers; that money then leaves under the rule of 55 with the rest. The reverse move, rolling the plan into an IRA after you leave, gives the exception up on every dollar moved. Check also how the plan pays former employees: some allow any partial withdrawal, others only a lump sum or fixed installments, and a plan that pays only a lump sum puts the whole balance on one tax return. The plan withholds 20 % of each payment made to you, even when, as above, the real tax is zero; the difference comes back at filing time.
Social Security is left out of these figures. Public safety employees qualify at 50 rather than 55, covered on the public safety page. To test another exit age with your own balances, use the early retirement calculator.