When retirees take on part-time jobs, they may unknowingly increase their total income to a level that triggers additional taxes on their Social Security benefits. This taxation is based on “combined income,” which includes:
- Adjusted gross income (AGI)
- Nontaxable interest
- Half of Social Security benefits
The Threshold That Matters
The IRS sets specific thresholds for Social Security taxation:
- Individuals:
- $25,000–$34,000 → Up to 50% of benefits taxable
- Above $34,000 → Up to 85% of benefits taxable
- Married couples filing jointly:
- $32,000–$44,000 → Up to 50% of benefits taxable
- Above $44,000 → Up to 85% of benefits taxable
The Story of John Henderson
John Henderson, a 68-year-old retiree from Colorado Springs, returned to part-time work at a local bookstore after retiring from engineering. “I wanted to stay active and engaged in my community, plus the extra cash seemed useful for our travel plans,” John explained.
By year’s end, however, his part-time income pushed his combined income over the threshold, leaving him with a much higher tax bill than expected.
A Common Oversight
Like many retirees, John believed his Social Security benefits had already been fully taxed during his working years. “I wasn’t aware that my Social Security benefits would be taxed so heavily,” he admitted. This misconception often leads to financial shocks for retirees returning to work.
Planning and Prevention
Financial experts recommend consulting a tax advisor before taking on part-time work. A clear understanding of how additional income affects Social Security can help retirees avoid unexpected tax burdens.
Tools and Resources
Online calculators and retirement tax planning tools can estimate how part-time work may impact taxable benefits. These resources enable retirees to make better-informed decisions.
Broader Implications for Retirement Planning
Beyond Social Security, extra income can also influence Medicare premiums and other income-sensitive benefits. Part-time work should be factored into a retiree’s overall financial and healthcare strategy.
Adjusting Retirement Savings
Advisors often suggest adjusting tax withholdings on part-time paychecks. This proactive step can prevent unpleasant surprises during tax season.
Additional Insights and Considerations
Not all retirement activities carry the same tax weight. Volunteering or hobby-based income may provide fulfillment without triggering the same tax liabilities as traditional part-time work. Understanding income nuances helps retirees maximize both financial security and quality of life.
While part-time work offers valuable financial and social benefits, retirees must remain aware of the potential tax consequences.
By planning ahead, leveraging tools, and consulting professionals, retirees can continue working without jeopardizing their financial stability—ensuring their later years are both rewarding and financially sound.
FAQs
When are Social Security benefits taxable?
Social Security benefits may become taxable when your combined income exceeds $25,000 for individuals or $32,000 for married couples filing jointly.
How much of my Social Security benefits can be taxed?
Depending on your income level, up to 50% or even 85% of your Social Security benefits may be subject to federal income tax.
What is combined income for Social Security taxation?
Combined income includes your adjusted gross income (AGI), nontaxable interest, and half of your Social Security benefits.
Can part-time work increase my Social Security taxes?
Yes. Earnings from a part-time job can raise your combined income above IRS thresholds, making a portion of your Social Security benefits taxable.
How can retirees avoid unexpected Social Security taxes?
Retirees can plan ahead by consulting a tax advisor, adjusting paycheck withholdings, and using retirement tax calculators to estimate potential liabilities.







Well in that case our social security checks should go up as well. If we’re putting more money into our social security then we should get more in Benifets. That’s more interest they get on OUR money. So every year we keep adding to social security the more we should get in our checks. It only makes sense to me. Like to hear what other people think.