Part-time work has become a common way for retirees to stay engaged, supplement income or ease into retirement. But once Social Security enters the picture, even small work decisions can ripple through benefits in ways many people don’t anticipate.
Retirement experts explained how part-time income interacts with Social Security rules and why timing and planning choices matter more than many retirees expect.
Many retirees assume part-time work is harmless from a tax standpoint when they begin collecting Social Security, but it’s more complicated than that. “The dollar limits matter,” according to Lynn Toomey, retirement and Social Security educator and founder of Her Retirement.
Earned income over “certain limits” can trigger temporary reductions in benefits, higher taxes or Medicare premium increases depending on when you claim and how much you earn, according to Adam Spiegelman, founder and wealth advisor at Spiegelman Wealth Management. “The rules are mechanical, updated annually and easy to overlook, which is why the impact often comes as a surprise.”
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The Social Security earnings test, which the Social Security Administration uses to determine how much of your benefits to pay, applies only to people who claim benefits before full retirement age and continue working. Because the income thresholds are relatively low — $24,480 in 2026 — even modest wages can trigger withheld benefits, Spiegelman said.
However, Jay Yu, an estate planning lawyer at Yu and Yu Law, clarified that withheld benefits in this case should not be considered a tax, “and it does not change your underlying entitlement. It simply suspends payment for enough months to account for the required withholding.”
For some retirees, that reality can be motivation to work a little longer before claiming benefits.
In most cases, working part time does not permanently reduce Social Security benefits, Spiegelman said. “If benefits are withheld due to the earnings test, Social Security recalculates your benefit at full retirement age and credits those withheld months back, increasing future payments.”
Toomey said to think of it more as a cash flow timing issue and less of a permanent loss.
However, while working part time does not permanently reduce your benefit, claiming early does lock in a lower amount for life, Yu warned. Spiegelman shared that claiming early can permanently reduce your Social Security benefit by about 25% compared to full retirement age.
“Coordinating your benefit start date with your work schedule can reduce or eliminate earnings-test withholding in high-earning months,” Yu said.
Even when benefits are not withheld, part-time income can still trigger higher taxes on Social Security and increase Medicare premiums through income-related monthly adjustment amount (IRMAA) surcharges, Yu said. These effects often show up later, making them harder to connect to earlier work decisions.
Because the thresholds are relatively low and not indexed for inflation, small earnings bumps can push more benefits into taxable territory, Spiegelman explained. Retirees should take all of this into consideration when deciding whether to keep or add part-time work.
In some cases, part-time work can increase future Social Security benefits. Because Social Security is based on your highest 35 years of earnings, “even modest new earnings can replace low or zero years and permanently lift your benefit,” Yu said.
This is most important for people with uneven work histories or years out of the workforce, Toomey stressed.
If you’re trying to determine whether part-time work is a good idea in retirement, it depends on more than wages alone, Toomey suggested. “The right question is not ‘Can I earn more?’ but ‘Does this improve my overall retirement life?’” she said.
“This isn’t just a financial decision,” Spiegelman agreed. “Retirees should run the numbers, but they should also factor in lifestyle, health, travel plans, family and other income sources.”
Revisiting the math each year as thresholds change can help prevent surprises, Yu said.
The biggest Social Security mistakes often come from failing to plan before claiming. Coordinating work plans, claiming age and tax strategy ahead of time can prevent unintended reductions and improve long-term outcomes, Spiegelman said.
Keeping the SSA informed of expected earnings also helps prevent overpayments, abrupt stoppages and surprise letters, Yu said.
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This article originally appeared on GOBankingRates.com: How Working Part Time in Retirement Can Quietly Change Your Social Security Benefits
