Life Insurance Interest May Trigger Medicare Premium Surcharges

Life insurance death benefits are generally federally tax-free, but any interest earned on those proceeds while held by an insurer is fully taxable. This taxable interest increases a beneficiary's modified adjusted gross income, which the government uses to determine Income-Related Monthly Adjustment Amount thresholds for Medicare Part B and Part D premiums.

For widows filing as single in 2026, the threshold for these surcharges drops to $109,000, compared to the $218,000 limit for married couples filing jointly. Because of this lower limit, relatively small amounts of insurance interest can trigger significant annual premium increases.

To mitigate these costs, the Social Security Administration allows individuals to file Form SSA-44. This request asks the agency to base Medicare premiums on current, lower post-death household income rather than older tax returns that included a spouse's earnings.