A retired accountant picked up some consulting work. Fifteen thousand a year. Easy money on top of Social Security and a pension. He did not change anything about how he filed his taxes. No estimated payments. No Schedule C. No self-employment tax.
The IRS sent him a bill for over four thousand dollars. And the consulting income also pushed his provisional income above the threshold where 85 percent of his Social Security became taxable for the first time. The side income did not just get taxed itself. It triggered taxes on money he was already receiving.
That is the mistake. And millions of retirees are making it right now.
In this video I break down the six IRS mistakes retirees with side income make and the six strategies that fix them.
Here is what I cover:
1. Why the IRS charges you 15.3 percent self-employment tax on side income regardless of your age or retirement status 2. Why not making quarterly estimated payments triggers a 7 percent underpayment penalty 3. Why Schedule C is required for any self-employment income over $400 and why skipping it costs you deductions 4. The Social Security taxation cascade — how side income pushes your provisional income above frozen thresholds and taxes benefits that were previously untaxed 5. The Social Security earnings test — $24,480 limit for 2026 if you are under full retirement age, and the $1 reduction for every $2 you earn above it 6. The 1099-K threshold change — platforms like Venmo and PayPal now report to the IRS at $2,000 instead of $20,000 7. Why mixing personal and business finances makes an audit dramatically worse 8. Strategies including Schedule C deductions, S Corp election, Solo 401(k) contributions, income timing, the $6,000 senior bonus deduction, and IRMAA awareness 9. The Additional Medicare Tax of 0.9 percent on self-employment income above $200,000 10. A seven-step action checklist you can start this week
The IRS does not care that you are retired. The moment you earn $400 in self-employment income, you are a business in their eyes.
SOURCES IRS.gov — Self-Employment Tax (Social Security and Medicare Taxes) IRS.gov — Schedule C, Profit or Loss from Business IRS.gov — Schedule SE, Self-Employment Tax IRS.gov — Estimated Taxes FAQ IRS.gov — Publication 334, Tax Guide for Small Business (2025) — SE tax rate 15.3%, $400 threshold, mileage rate 72.5 cents for 2026, SE wage base $184,500 for 2026, 1099-K threshold $2,000 for payments after 2025 IRS.gov — Publication 505, Tax Withholding and Estimated Tax (2026) IRS.gov — 2026 Filing Season Updates for Seniors (Tax Tip 2026-14) — $6,000 senior deduction SSA.gov — Benefits Planner: Receiving Benefits While Working — earnings test $24,480 / $65,160 for 2026 Kiplinger — Social Security Earnings Test Explainer, March 2026 Kiplinger — Self-Employed Tax Guide 2026 — QBI deduction, deductible expenses Fidelity — Self-Employment Tax Guide — quarterly payment deadlines
DISCLAIMER: This video is for educational purposes only and does not constitute tax, legal, or financial advice. Tax laws change frequently. Consult a qualified tax professional for your specific situation.
