Deciding to go back to work after retiring looks different for different people. It might be for financial reasons or simply to stay busy, but either way, it’s important to understand how the extra income could affect tax liability.
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With some careful planning, retirees who headed back into the world of work last year can avoid surprises and headaches before filing.
Social Security Taxation
Taxes on Social Security are based on “combined income,” which includes wages, self-employment income, dividends and other taxable income. If a retiree goes back to work, any additional earned income might push them over the thresholds where up to 85% of Social Security benefits become taxable.
“Every additional dollar of earned income can have a ripple effect across multiple parts of a retiree’s tax return,” explained Laurie Smith, tax partner at Wiss.
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New Income Affecting Withholding
According to Veronica Karas, certified financial planner (CFP) and principal at CapTrust, one of the most common mistakes is not adjusting withholding across multiple income sources, and errors can lead to unexpected tax bills and potentially penalties.
A proactive withholding review can help avoid this, as can making estimated tax payments. Retirees who take on freelance or consulting work may need to make quarterly payments to the IRS, since taxes are typically not withheld automatically from 1099 income.
Missing Income Forms
Retirees returning to work in part-time or consulting roles often underestimate how that income is reported to the IRS, according to Smith.
For example, 1099s for consulting gigs and W-2s for part-time work are often sent digitally instead of by regular mail, so they have the potential to be missed by the taxpayer — but not by the IRS, which gets copies of the forms and matches them to Social Security numbers.
“Missing income is an easy catch for their systems and often leads to notices, penalties and interest,” Smith said.
Planning for the Tax Impact of Working in Retirement
While the standard filing deadline for tax year 2025 is fast approaching, there’s still time to review and file correctly, and the lessons learned can help prepare for the 2026 tax year.
As Karas noted, “it just means it’s worth planning for the downstream effects.” By managing these moving parts early, the focus can stay on the work itself rather than the stress of a surprise tax bill.
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This article originally appeared on GOBankingRates.com: What Happens To Your 2025 Taxes If You Retired but Returned to Work?
