Most Americans know 62 is the earliest they can file for Social Security.
Far fewer realize that claiming early locks in a permanently smaller check — and the gap between the earliest and latest filing ages is bigger than most people expect.
Your full retirement age, or FRA, depends on when you were born.
Anyone born in 1960 or later hits FRA at 67.
Claim at 62, and your monthly benefit drops by up to 30% compared to waiting until 67.
Wait until 70, and you earn delayed retirement credits of about 8% per year, pushing your check roughly 24% above the FRA amount.
Those percentages compound over a retirement that could easily last 25 years.
A worker with a $2,000 full benefit at 67 would see about $1,400 at 62, or roughly $2,480 at 70.
That's a difference of more than $1,000 a month, every month, for life.
But there's a catch that rarely makes the headlines: waiting isn't automatically the smart move.
If you have health problems, if you're out of work and need the money now, or if you're the lower earner in a married couple, filing earlier can make sense.
The break-even point where waiting pays off often lands in your late 70s or early 80s.
Married couples have extra strategy to consider.
The higher earner generally benefits most from delaying, because that larger check becomes the survivor benefit when one spouse passes.
A widow or widower can keep the bigger of the two checks, which can mean decades of higher income for the surviving spouse.
Claim before FRA and keep working, and the Social Security Administration may temporarily withhold part of your benefit if you earn above a set threshold.
That money isn't lost forever — it's added back once you reach FRA — but it can surprise people who file at 62 while still holding a job.
Divorced spouses often miss a benefit they've already earned.
If you were married at least 10 years, you're currently unmarried, and your ex's benefit is higher than yours, you may qualify for a spousal benefit based on their record.
It doesn't reduce what your ex receives, and you don't need their permission.
The simplest first step costs nothing: create a my Social Security account at ssa.gov.
You'll see your actual earnings history, your estimated benefit at 62, at FRA, and at 70, all based on your real record rather than a generic calculator.
Check the earnings history for errors, since missing years can drag your benefit down permanently.
Then run your own break-even numbers instead of trusting a rule of thumb.
Factor in your savings, your spouse's age and benefit, and how long you realistically expect to work.
The bottom line: there's no universal right age to claim, and anyone who tells you otherwise is selling something.
Final Thoughts
But the penalty for guessing wrong is measured in thousands of dollars a year, so it's worth an afternoon of homework before you click file.