Here are two monthly checks: $1,400 and $2,480. Same worker, same earnings record, same Social Security formula. The only difference is the birthday on which that worker walked into the claim. That is the entire stakes of the 62-versus-70 decision, and the arithmetic behind it is published, fixed, and worth seeing in full before you file.
Social Security does not have one benefit amount for you. It has a sliding scale of them, anchored to your full retirement age, and every month you claim early or late moves the number. For anyone born in 1960 or later, full retirement age is 67, and the Social Security Administration spells out exactly what claiming at each age does to the check.
Where your base number comes from
The formula starts with your primary insurance amount, the monthly benefit you would receive at exactly your full retirement age. It is calculated from your 35 highest-earning years. Claim before 67 and the agency applies a permanent reduction: five-ninths of 1 percent for each of the first 36 months early, plus five-twelfths of 1 percent for every month beyond that, as laid out on the SSA retirement age and benefit reduction page.
Stack up the maximum 60 months of early claiming, from 67 back to 62, and the reduction reaches 30 percent. A worker whose full benefit would be $2,000 gets $1,400 by claiming at 62. Not for a while. For life, aside from cost-of-living adjustments.
What waiting past 67 pays
The scale keeps sliding in the other direction after full retirement age. For each month you delay between 67 and 70, Social Security adds a delayed retirement credit of two-thirds of 1 percent, which is 8 percent per year, per the SSA delayed retirement credits page. Wait the full three years and your check is 124 percent of your primary insurance amount.
That same $2,000 worker who files at 70 gets $2,480 a month. One detail people miss: the credits stop at 70. There is no financial reason to delay past that birthday, and SSA says so plainly. The agency’s early or late retirement tables show the exact multiplier for every claiming month in between.
The same worker at three ages
Put the whole range side by side for a worker with a $2,000 full retirement age benefit:
At 62, the check is $1,400, or 70 percent. At 67, it is $2,000, the full 100 percent. At 70, it is $2,480, or 124 percent. The spread between the earliest and latest claim is $1,080 a month, roughly $12,960 a year, and it persists for as long as the benefit is paid.
Cost-of-living adjustments apply on top of whichever base you lock in, and they compound the gap rather than closing it. The 2026 adjustment was 2.8 percent, which SSA said would lift the average retired worker’s benefit by about $56 a month, to roughly $2,071, according to the agency’s October announcement. A 2.8 percent raise on $2,480 is simply more dollars than a 2.8 percent raise on $1,400, every year, forever.
It is also worth remembering that 62, 67, and 70 are the endpoints and the midpoint, not the only choices. Every single month between them carries its own multiplier. A worker who files at 65, for example, takes a smaller reduction than one who files at 62, and a worker who delays to 68 banks one year of credits instead of three. The published tables let you price any birthday you like, which turns the decision from a cliff into a dial. Many retirees who cannot imagine holding out until 70 find that waiting even twelve or eighteen months past their first eligible check changes the monthly amount meaningfully.
The break-even arithmetic, and its limits
Waiting is not free money. The worker who delays from 62 to 70 gives up 96 months of $1,400 checks, about $134,400, before collecting anything. The larger check then claws that back at $1,080 a month, which takes a bit over ten years. In this simplified example, ignoring cost-of-living adjustments, taxes, and what you might have earned investing the early checks, the age-70 claimer pulls ahead somewhere in the early 80s.
That is why there is no universally correct answer. Someone in poor health, or who simply needs the income at 62, can be entirely rational to claim early. Someone with longevity in the family, other savings to bridge the gap, or a lower-earning spouse who may one day receive a survivor benefit based on the higher earner’s check has a strong case for waiting. The delayed credits function as inflation-adjusted longevity insurance you cannot buy at that price anywhere else.
Before you file
Two practical cautions. First, if you claim before full retirement age and keep working, the earnings test can temporarily withhold part of your benefit until you reach full retirement age; the money is not lost, but the timing surprise is real. Second, this decision is separate from Medicare, which starts at 65 regardless of when you claim Social Security.
Most importantly, do not run this math on a hypothetical worker. Your own numbers, at every claiming age, are in your my Social Security account, which takes a few minutes to create and shows your actual earnings record and benefit estimates. The percentages above are fixed by law. The right age to apply them is personal, and it deserves an evening with your real statement rather than a rule of thumb.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
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