Unretiring: why a growing number of retirees go back to work

What you’ll learn in this guide:

• Why “unretiring” is a documented, growing trend, not an isolated story
• The range of reasons people actually go back to work — it’s not only financial
• What changes with Social Security, Medicare, and taxes if you re-enter the workforce
• Why re-entry is often harder than expected, and what that means for planning
• How to think about this differently than the first retirement decision

A real, growing trend — not a one-off story

“Unretiring,” sometimes called the boomerang-retiree trend, refers to people who formally retire and then return to paid work, whether full-time, part-time, or through freelance and gig platforms. Surveys have tracked a real increase in this pattern in recent years — AARP’s own research found the share of retirees who’d re-entered the workforce ticking up year over year — driven by a combination of financial pressure (inflation eating into fixed income, a soft stretch in the markets) and, for a meaningful share of people, reasons that have little to do with money at all.

The reasons aren’t only financial

Financial need is the most commonly cited driver in survey data, and it’s real: rising costs and underwhelming market returns have pushed a real share of retirees back toward paid work to make the numbers hold up. But it isn’t the whole story. Plenty of people who unretire describe missing the structure a job provided, the social connection of coworkers, or simply enjoying the specific work itself — distinct from needing the paycheck. That distinction is worth being honest about before re-entering: someone unretiring primarily to solve a structure-and-connection gap may be better served exploring volunteering, a part-time encore role, or phased retirement rather than a full return to a prior career, while someone unretiring primarily out of financial necessity faces a more numbers-driven version of the decision. Building a retirement identity covers the broader version of the “who am I without the job” question that often sits underneath this.

What changes with Social Security if you go back

If you’re collecting Social Security and haven’t yet reached full retirement age, going back to work subjects your benefit to the earnings test — a temporary withholding, not a permanent cut, that reduces your check once earnings cross an annually-adjusted threshold. Once you’ve reached full retirement age, the earnings test disappears entirely and you can earn any amount with no reduction to your benefit. Working in retirement and Social Security: what changes covers this mechanism in full, and Working in retirement: encore careers, gig work, and what changes beyond Social Security covers the broader tax picture, including for gig and freelance income specifically.

What changes with Medicare and taxes

Returning to work doesn’t change Medicare enrollment itself, but earned income can affect IRMAA — the income-based surcharge added to Medicare Part B and D premiums for higher earners — since IRMAA is based on income from two years prior, meaning a strong earning year while unretired can raise Medicare premiums starting roughly two years later. Earned wages are also subject to ordinary payroll withholding (Social Security and Medicare payroll tax) regardless of age or retirement status, on top of regular income tax. None of this makes going back to work a bad idea on its own — it just means the numbers genuinely change in ways worth modeling rather than assuming.

Why re-entry is often harder than expected

Survey data has also found a less encouraging pattern: a majority of retirees considering a return to work say they expect it to be difficult to actually find a position, and labor-market conditions for older job-seekers vary considerably by field and region. This is worth factoring into the decision realistically — for some, the more viable path back isn’t a return to a prior full-time role but a shift toward consulting, gig platforms, or part-time work in a different capacity, which can offer more control over how much and how often to work than reapplying to a traditional job search.

A different kind of decision than the first retirement

The original decision to retire is usually made once, often with significant lead time to plan around it. Unretiring tends to happen more reactively — in response to a specific financial shortfall, a specific feeling of restlessness, or both — which makes it worth pausing to actually name what’s driving the decision before acting on it, the same way the original retirement decision deserved real thought rather than a default. Whether the right move ends up being full re-entry, a scaled-back encore role, or addressing the underlying issue (a withdrawal-rate adjustment, a benefits review) without returning to paid work at all is a genuinely individual question, worth working through with a financial planner who can model the actual numbers specific to your situation.