SerpApi.Org
Many workers assume that Social Security focuses primarily on the income they earn immediately before retirement. That belief can create unnecessary pressure to remain in a high-paying position during the final years of a career. The direct answer is no: Social Security does not normally calculate retirement benefits using only the last year, the final two years or even the final decade of employment. Instead, the agency looks broadly at a worker’s lifetime earnings record.
The Social Security Administration generally uses the highest 35 years of wage-indexed earnings to calculate a worker’s average indexed monthly earnings, commonly known as AIME. Earlier earnings are adjusted to reflect changes in average national wages, allowing income earned decades ago to be compared more fairly with later salaries. The agency then applies a formula to the AIME to determine the primary insurance amount, which is the benefit available at full retirement age.
When the final years of work can still make a difference
Recent working years may increase a future benefit when they replace lower-earning years already included in the 35-year calculation. For example, someone who earned modest wages early in a career but receives a substantial raise later may improve the average by continuing to work. The benefit can rise whenever a new year of earnings is higher than one of the 35 years currently being counted, regardless of whether that stronger year arrives at age 40, 55 or 68.
The final years become even more important for workers who have fewer than 35 years of covered earnings. Social Security inserts a zero for every missing year needed to complete the 35-year record, and those zeros can significantly reduce the average. Continuing to work until the record includes 35 earning years can replace those zeros, while working longer may replace additional low-income years. A person with 30 years of earnings would initially have five zeros included in the calculation.
There is also a limit to how much annual income can count toward the benefit calculation. In 2026, Social Security taxes and credits earnings only up to $184,500, an increase from $176,100 in 2025. Income above the annual taxable maximum does not generate additional retirement benefits. Workers who consistently earn at or above this ceiling for many years may qualify for much larger payments, although earning the maximum during only the final few years will not erase decades of lower wages.
Claiming age can ultimately have a greater effect on the monthly payment than the final years of salary. For someone whose full retirement age is 67, beginning benefits at 62 can reduce the payment by as much as 30%, while delaying beyond full retirement age can increase it until age 70. In 2026, the maximum benefit is $2,969 for someone retiring at 62, $4,152 at full retirement age and $5,181 at 70, although those amounts require a history of maximum taxable earnings.
Workers should therefore review their complete earnings record rather than concentrating only on the salary shown on their final paychecks. A personal “my Social Security” account provides estimates at different claiming ages and can reveal missing or incorrectly reported earnings. The last years of work matter only when they improve the 35-year average; lifetime earnings and the age at which benefits begin remain the two central factors shaping the final monthly check.
