Social Security recipients who continue working full time face a complex tax situation that can quietly erode retirement income if left unmanaged.
For a 73-year-old still earning wages, the combined weight of Social Security income, payroll taxes, and required minimum distributions can create a significant federal tax burden.
Federal law requires that up to 85% of Social Security benefits become taxable when a single filer’s combined income exceeds $25,000, or $32,000 for joint filers.
Working full time virtually guarantees that most recipients will blow past those thresholds, making some portion of their Social Security benefits subject to federal income tax.
One advantage of working past full retirement age is that earnings no longer reduce the Social Security benefit itself, meaning a 73-year-old faces no earnings cap or benefit penalty for continuing to work.
However, required minimum distributions present a separate and compounding challenge for older workers still drawing a paycheck.
RMDs from traditional IRAs and former employer plans, which now begin at age 73, stack on top of wages and Social Security income, pushing adjusted gross income higher and triggering greater tax exposure on benefits.
Even workers enrolled in both Social Security and Medicare are not exempt from payroll taxes, with the Social Security rate set at 12.4% on wages up to $184,500 in 2026, split between employee and employer.
The Medicare tax, which carries no income cap, adds another 2.9% on all wages, also split evenly between employee and employer, compounding the tax drag for full-time older workers.
Roth conversions represent one of the most effective long-term strategies available, since Roth IRAs and Roth 401(k)s carry no RMD requirements and withdrawals are tax-free for those over 59½ who have held the account for at least five years.
Financial planners often recommend Roth conversions for workers who expect to be in a higher tax bracket later, as reducing future RMDs directly reduces future taxable income and Social Security tax exposure.
Another approach involves managing gross income carefully, since the simplest way to avoid paying taxes on Social Security is keeping gross income below the threshold at which a tax return must be filed.
Workers can also take immediate steps to avoid surprise tax bills by updating their W-4 withholding with their employer to reflect their full income picture, including Social Security and investment income.
The IRS allows Social Security recipients to file a W-4V form, which authorizes the Social Security Administration to withhold federal income taxes directly from benefit payments before they arrive.
State taxes add yet another layer of complexity, as residents of Colorado, Connecticut, Minnesota, Montana, New Mexico, Rhode Island, Utah, and Vermont may also owe state-level taxes on their Social Security benefits.
Planning carefully across all income streams, including wages, RMDs, and Social Security, remains the most reliable way for older full-time workers to manage their overall tax liability.
