Social Security at 70: Here’s Where the Math Stops Working

The monthly Social Security benefit you receive in retirement is based on your personal wage history. And if you sign up for benefits at full retirement age (FRA), which is 67 if you were born in 1960 or later, you’ll get those monthly checks without a reduction.

But you have options for claiming Social Security beyond that point. You could delay your claim past FRA and score an 8% increase to your monthly benefits per year you wait, until you turn 70.

In fact, delaying Social Security until 70 is often regarded as a savvy financial move. Locking in larger checks means securing more guaranteed income, plus larger inflation boosts when cost-of-living adjustments arrive.

But larger monthly Social Security benefits don’t automatically mean more lifetime income. In fact, the math behind delaying Social Security depends on how long you live. And if you don’t live long enough to make up for the years of benefits you skip by waiting, you could end up losing out on Social Security you could’ve otherwise had.

The key factor you can’t overlook when delaying Social Security

The idea of a larger retirement paycheck each month might sound nice. But if your health is poor or your parents passed away when they were fairly young, then delaying Social Security may not end up making financial sense.

Say you’re entitled to $2,000 a month in Social Security at 67. If you wait until age 70 to file, your monthly check will increase to $2,480.

At age 82 and 1/2, you’ll break even. In other words, you’ll end up with the same amount of Social Security regardless of whether you file at 67 versus 70 — $372,000.

But let’s say your health is in bad shape and your parents passed away in their mid-70s. There’s no guarantee the same will happen to you. But if it does, and you pass at 75, the math changes.

In that case, claiming Social Security at FRA gives you $192,000 in total benefits. Waiting until 70, on the other hand, only gives you $148,800.

That’s why delaying isn’t automatically the mathematically superior choice. The calculation depends on your personal circumstances rather than a one-size-fits-all rule.

When waiting until 70 makes sense

Delaying Social Security is often a strong strategy if you’re in good health, have a family history of longevity, and expect to live well into your 80s or beyond. It can also make sense if you’re still working and don’t need your Social Security benefits to cover your living expenses, or if you don’t have a lot of retirement savings and need large checks to compensate.

Waiting on Social Security could also make sense from a survivor benefit standpoint. If you’re the higher-earning spouse in your household, delaying your benefit and boosting it could provide your surviving spouse with more guaranteed income for years.

But if you have significant health concerns or expect a shorter-than-average lifespan, claiming Social Security earlier than 70 may allow you to collect more benefits over your lifetime. So don’t go into your filing decision assuming that taking benefits at 70 is automatically the right choice.

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