Millions of Americans are planning their retirement around a number they memorized years ago: 65.
But for anyone born after 1959, that number is wrong.
The full retirement age for Social Security has been quietly climbing for decades, and it now sits at 67 for everyone born in 1960 or later.
If you claim at 65 expecting your full benefit, you'll get a permanent reduction instead.
Full retirement age, or FRA, is the age at which you qualify for 100% of the benefit you've earned.
For someone with an FRA of 67, filing at 62 cuts benefits by about 30%.
Waiting until 70 boosts them by roughly 24% above the full amount.
That gap is one of the biggest levers in personal finance, and most people don't run the math before they file.
Say your full benefit at 67 would be $2,000 a month.
Claim at 62, and you're looking at closer to $1,400.
That's $600 less every month, and it compounds over what could be a 25-year retirement.
Waiting until 70 instead pushes that same benefit past $2,400.
Same work history, same taxes paid, wildly different outcomes based on a single filing date.
Claiming early while you're still working can trigger the retirement earnings test.
In 2025, if you're below FRA and earn above $23,400, Social Security withholds $1 for every $2 you earn over that limit.
The withheld money isn't gone forever — it's added back into your benefit once you reach FRA — but it can mean a smaller check right when you were counting on it most.
If you sign up for Social Security before 65, you're automatically enrolled in Medicare Parts A and B when you turn 65, and the Part B premium gets deducted from your check.
For many retirees, that first Medicare deduction is an unwelcome surprise that shrinks take-home pay by roughly $185 a month in 2025, depending on income.
First, log into your my Social Security account and check your FRA and your estimated benefits at 62, 67, and 70.
Those personalized numbers beat any rule of thumb.
Second, think about health, work plans, and whether you're married — survivor benefits can make the higher earner's claiming decision matter for two lifetimes.
A common strategy is for the lower earner to claim earlier while the higher earner waits, maximizing the survivor benefit.
Social Security's trust fund faces long-term shortfalls, and lawmakers have floated changes for years, from raising the FRA further to adjusting the payroll tax cap.
Anyone under 50 should assume the program looks somewhat different by the time they file — but probably not gone.
The bottom line: your retirement age isn't a fixed fact you learned once.
It's a moving target tied to your birth year, and knowing your real number can be worth tens of thousands of dollars over a retirement.
Spend twenty minutes on the Social Security website this week.
Final Thoughts
It's the cheapest raise you'll ever give yourself.