If you were born in 1960 or later, your full retirement age is 67.
That surprise lands hard for a lot of people who spent decades hearing that 65 was the magic number.
The Social Security Administration has been phasing in the higher age since 1983, and for anyone hitting their early sixties now, there is no phase left — 67 is simply the finish line for full benefits.
Here's why the exact number matters more than almost any other retirement detail.
Claim at 62 and your monthly check gets cut permanently.
Claim at 67 and you get 100% of what you're owed.
Wait until 70 and you earn delayed credits on top of that.
For someone with a $2,000 full benefit, claiming at 62 drops it to roughly $1,400 a month, and waiting to 70 pushes it past $2,400.
Over a 20-year retirement, it can mean six figures.
The tricky part is that your personal number isn't obvious.
It depends on your birth year, not just "65" or "67." Anyone born in 1959 has a full retirement age of 66 and 10 months, a weird in-between that catches people off guard.
The cleanest way to check is to create a my Social Security account at ssa.gov.
It shows your estimated benefit at 62, at your full retirement age, and at 70, based on your actual earnings record.
Ten minutes there beats guessing for a decade.
Spouses and ex-spouses have their own math.
A lower-earning spouse can often claim a spousal benefit worth up to half of the higher earner's full amount, and a marriage that lasted at least 10 years can still qualify an ex for benefits.
Survivor benefits work differently too, which is why financial planners often tell the higher earner in a couple to delay as long as possible.
That decision protects whoever lives longer.
There's also a tax trap that surprises retirees every year.
Social Security benefits can be partially taxable once your combined income crosses certain thresholds, and those thresholds have never been adjusted for inflation.
That means more retirees owe tax on their benefits each decade, even though the underlying rule hasn't changed.
Add in Medicare premium deductions, which come straight out of your check, and the number that lands in your bank account is often smaller than the estimate you saw years earlier.
One more thing worth knowing: the annual cost-of-living adjustment, or COLA, applies to everyone regardless of when you claimed.
It's a percentage raise on your benefit, not a flat dollar amount, so a bigger base benefit means a bigger raise every January.
That's another quiet argument for waiting if your health and job situation allow it.
The honest takeaway is that "retirement age" is really three different numbers — the age you can claim, the age you get full benefits, and the age that pays the most.
Knowing which is which before you file can be worth tens of thousands of dollars.
Final Thoughts
Check your actual estimate, run the math on waiting, and don't let a number you heard in the 1990s decide your income for the next 25 years.