5 Things to Know Before Going Back to Work in Retirement

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More retirees than ever are picking up part-time or full-time work after officially “retiring” — not always because they want to, but because low returns on cash savings, longer lifespans, and the rising cost of living have stretched retirement budgets thinner than expected.

If you’re considering heading back to work, or think you might eventually, here are five things worth understanding before you take the leap.

1. Working Before Full Retirement Age Can Temporarily Reduce Your Social Security Benefits

You can work and collect Social Security at the same time — but if you claim benefits before your full retirement age (FRA) and keep earning, the rules get more complicated.

For anyone born in 1960 or later, FRA is 67. If you’re under FRA for the entire year, Social Security will withhold $1 in benefits for every $2 you earn above $24,480 (the 2026 limit). In the year you reach FRA, a more generous limit applies — $65,160 — and only $1 is withheld for every $3 earned above that, counting only the months before your birthday. Once you hit FRA, the earnings test disappears entirely and you can earn any amount without affecting your benefit.

Importantly, withheld benefits aren’t gone forever — Social Security recalculates your monthly payment upward once you reach FRA to credit you for the months benefits were reduced. Still, if you’re counting on a specific benefit amount to cover expenses in the short term, it pays to understand how working now affects what actually hits your bank account.

Delaying benefits past FRA, up to age 70, permanently increases your monthly check by roughly 8% per year of delay — one of the most reliable “returns” available to retirees who can afford to wait.

2. Budget on After-Tax Income, Not Gross Pay

Many people returning to part-time work set a budget based on gross earnings, then get an unpleasant surprise at tax time. Up to 85% of your Social Security benefit can become taxable once you add other income on top of it, depending on your total income and filing status. Most states that tax income treat Social Security the same way the federal government does, though a handful use their own formulas.

If you don’t withhold enough from your paycheck or set aside money for taxes throughout the year, you could owe more than expected — and face an underpayment penalty on top of it.

3. Factor In Health Care Coverage

Health insurance is one of the biggest wildcards for anyone retiring before age 65, since Medicare eligibility doesn’t start until then. If your spouse doesn’t have coverage through an employer and you don’t either, private insurance can run into the tens of thousands of dollars a year for a household.

A part-time job that comes with health benefits can be a genuine bridge during those pre-Medicare years — though jobs like that aren’t always easy to find. Even after you turn 65 and Medicare kicks in, supplemental coverage through an employer can help close gaps that traditional Medicare doesn’t cover, particularly for prescription drugs and out-of-pocket costs.

4. Understand How a Pay Cut Affects Your Pension

If you’re one of the shrinking number of workers with a traditional pension, many plans calculate your benefit using a formula based on your salary in the years just before retirement. Trading a full-time, higher-paying role for a part-time position at the same company — even a well-earned one — can meaningfully shrink what you eventually collect.

Talk to your pension administrator before making the switch, not after. Plenty of people don’t realize the impact of this trade-off until they’ve already made the move.

5. Make Sure the Math Actually Works

Before taking any job, run the numbers on what you’ll actually keep after taxes — and don’t forget the hidden costs of working: commuting, parking, work clothes, and the daily lunch that adds up faster than people expect.

It’s worth having this conversation with yourself, or a financial advisor, before you leave a job — not after. Once you’ve crunched the real numbers on what you need to live on in retirement, working longer or working part-time often turns out to be one of the most effective ways to strengthen your retirement picture, especially if it means delaying Social Security or leaving retirement savings untouched a little longer.