# How Your Best 35 Working Years Shape Every Social Security Check
Your Social Security benefit amount depends on the Social Security Administration's calculation of your average earnings across your highest 35 years of work. This formula determines what you'll receive at full retirement age, typically between 66 and 67 depending on your birth year.
The SSA drops your lowest-earning years from the calculation. If you worked fewer than 35 years, the agency counts the missing years as zeros, which lowers your average. This matters because even one year of zero earnings can reduce your lifetime benefit by roughly 3 percent.
Several strategies let you boost your benefits before claiming. Delaying your claim increases your payment by roughly 8 percent per year from age 62 to 70. For someone with a $2,000 monthly benefit at 66, waiting until 70 nets nearly $2,640 monthly, a permanent 32 percent raise.
You can also raise your highest-35-year average by working longer. Adding a high-income year to replace a low-earning year in your record rebuilds your average. The older you are, the more each new year of earnings helps, since the oldest earnings drop out of the calculation.
Self-employed workers and career-changers benefit most from understanding this. If you earned little early in your career, working an extra year or two at higher pay in your late 60s can significantly lift your benefit.
Check your Social Security statement online at ssa.gov to see your earnings record. The SSA posts estimated benefits at different claiming ages. Gaps in your record signal missed work years that count as zeros. Spotting errors early gives you time to request corrections, which the SSA requires you to do within three years, three months, and 15 days of the year earnings were posted.
Women, who often take career breaks for