How Social Security Benefits Get Recalculated After Retirement

Once you start collecting Social Security, the size of your checks will change annually. There are of course the annual cost of living adjustments (COLAs). Designed to help cover the costs of inflation, this year’s COLA was a 2.8% increase.

But the Social Security Administration (SAA) also recalculates your earnings each year if you continue to work. This can work in your favor or against you, depending on when you choose to start collecting benefits.

Social Security determines benefit amounts based on your total work history. The SSA formula looks at the 35 years when you earned the most money. If you’re still working and make more money in any one year than one of those 35 years, the SSA replaces the lowest-earning year in your record. That will mean higher benefits for you once the formula is calculated.

“Each extra year you work adds another year of earnings to your Social Security record,” the SSA explains. “Higher lifetime earnings can mean higher benefits when you retire.”

Some people worked less than 35 years or didn’t pay Social Security taxes for a full 35 years. In those cases, the SSA assigns $0 for each year where there was no worker contribution. If you continue to work, the SSA will automatically replace these $0 years with your post-retirement earnings. Again, that calculation will increase your payout.

When Benefits Can Decrease

Starting Social Security benefits before you reach full retirement age can lower your monthly checks in several ways. While you can start collecting at age 62, the current full retirement age is 67 for those born in 1960 or later. If you were born from 1943 to 1954, the full age is 66, and the age increases gradually if you were born from 1955 to 1960, until it reaches 67.

First off, the benefits are significantly lower if you start collecting before full retirement age. “For example, if you turn age 62 in 2026, your benefit would be about 30% lower than it would be at your full retirement age of 67,” according to the SSA. And your benefits actually go up each year that you postpone receiving benefits after full retirement, maxing out at age 70. “We’ll add 8% to your benefit for each full year you delay receiving Social Security benefits beyond full retirement age,” the SSA says.

There are also pretty tight income limits if you claim Social Security before reaching full retirement. The annual limit for 2026 is only $24,480. If you make more than that, SSA will reduce your benefits. “If you’re younger than full retirement age, we’ll deduct $1 in benefits for each $2 you earn above the annual limit,” the SSA explains.

A much higher income limit, $65,160, applies if you’re still working and decide to start taking benefits during the year of your full retirement age. In that year, SSA will “reduce your benefits $1 for every $3 you earn over [the] annual limit. This reduction continues until the month you reach full retirement age. Once you reach full retirement age, you can keep working, and we won’t reduce your Social Security benefit no matter how much you earn.”

So, for example, if your birthday is in September, the income limit would only apply for any earlier months when you received benefits. The limit wouldn’t apply for September-December.

This rebalancing happens automatically each year, based on tax records, but you can review your yearly earnings record by creating an SSA account. SSA also offers a retirement earnings test calculator to understand your benefits.

An important side note: Even if you delay receiving Social Security benefits, you should still apply for Medicare at age 65 in most cases. There can be substantial penalties for missing the age 65 enrollment deadline.