Extra earnings from rentals can push retirees over income thresholds, taxing up to 85% of Social Security and increasing Medicare premiums.
A 71-year-old nurse renting a spare room faces higher taxes on Social Security benefits and a potential $81 monthly Medicare Part B surcharge. The additional income pushes her modified adjusted gross income (MAGI) above the $109,000 threshold, triggering the full surcharge for single beneficiaries.
Up to 85% of Social Security benefits become taxable when provisional income exceeds certain limits. While deducting allocated expenses can reduce exposure, wages, IRA withdrawals, and rental income all contribute to MAGI, complicating tax planning for retirees.
Retirement forums highlight growing concerns as seniors turn to side income to cover rising living costs. With the personal saving rate at 3.9% in Q1 2026 and inflation climbing, fixed incomes struggle to keep pace, forcing many to seek additional revenue streams.