A Social Security cost-of-living adjustment can increase your benefit without producing the same increase in the amount that lands in your bank account. This is important because the COLA applies to the benefit calculation, while deductions and other adjustments can change the final payment.
For 2026, Social Security benefits received a 2.8% COLA, with the increase beginning with benefits payable in January. A quick glance at an old payment and a new deposit might therefore create a head-scratching moment if the numbers do not match the percentage that appeared in the COLA announcement. The good news is that the difference usually has a perfectly explainable reason, and it starts with how Social Security calculates the benefit before sending the money.
