Your Social Security benefit is calculated based on your highest 35 years of earnings over your career, indexed to the current year. So what impact can continuing to work past age 62 (or later) have on your Social Security benefits?
Any year in your earnings history that had very little or no earnings covered by Social Security works against you – since the calculations assume 35 years of earnings. If you only had, for example, 30 years of earnings on your record and five “zero” years, these years with no earnings will reduce your average earnings that are used for calculating your benefit amount. Continuing to work, even for a minimal amount, will eliminate these zero years from your record for calculation.In addition, if you’re earning a higher salary relative to your earnings record, some of the lower years’ earnings can be eliminated from your calculation record as well, thereby boosting your Social Security benefit by increasing the overall average. Lastly, when you get your annual statement from the Social Security Administration, a projected benefit amount is reported. If you read the fine print, the projected benefit amount assumes that you continue to work up to the retirement age indicated, with your earnings remaining roughly the same as your most recent year.
If you retire at age 62 and wait to age 66 to begin receiving benefits, the amount of benefit that was projected for you at age 62 will be lower because you will have added zero years to the end of your working career. The estimate assumed that you continued working at (presumably) a high earnings rate relative to the rest of your record.