The number that decides when millions of Americans can finally stop working has been quietly moving for decades, and it's not done yet.
For anyone born in 1960 or later, the full retirement age sits at 67.
That's up from 65 for workers who signed up years ago, and the shift has already trimmed monthly checks for an entire generation.
Claim at 62 and you accept a permanent reduction, roughly 30 percent below your full benefit if your full retirement age is 67.
Wait until 70 and you earn delayed retirement credits that push your check about 24 percent higher than the full amount.
Same worker, same career earnings, wildly different monthly deposits for the rest of their life.
The reason this keeps making headlines is arithmetic, not politics.
Social Security's trust fund is projected to run dry in the mid-2030s, after which incoming payroll taxes would cover only about three-quarters of scheduled benefits without action from Congress.
One frequently floated fix is raising the full retirement age again, perhaps to 68 or 70.
Another is lifting the cap on wages subject to payroll tax.
Lawmakers have debated both for years without a deal.
For households planning ahead, the practical takeaway is that 65 is no longer a safe assumption.
Medicare still starts at 65, but Medicare isn't Social Security, and confusing the two is one of the most common and costly mistakes people make.
Signing up for Medicare does not trigger your retirement benefit, and delaying Social Security past 65 does not delay your Medicare enrollment.
The claiming decision also interacts with taxes in ways that surprise retirees.
Up to 85 percent of Social Security benefits can be taxable depending on your combined income, and a part-time job or a traditional IRA withdrawal can push you over a threshold.
Claiming early while still working can temporarily withhold part of your benefit too, though those dollars are generally restored later.
Then there's the question of what a higher retirement age actually means for the workforce.
Physically demanding jobs, layoffs after 55, and health problems make "just work longer" easier said than done for many people.
A raise in the full retirement age functions as an across-the-board benefit cut, because it lowers monthly payments for anyone who still claims at the same age they always planned to.
The smartest move for most workers is to pull their personal Social Security statement at ssa.gov and look at the actual dollar figures for claiming at 62, at full retirement age, and at 70.
Those three numbers often differ by hundreds of dollars a month.
Seeing them side by side changes how people think about the decision far more than any headline about Washington ever will.
One more thing worth doing now: check your earnings record for errors.
Missing years of income can shrink your benefit permanently, and the fix is much easier before you file than after.
The retirement age debate will keep grinding on in Congress, but your claiming date is a decision you control.
Final Thoughts
Treat 67 as the new baseline, run your own numbers, and don't let a default assumption quietly cost you tens of thousands of dollars over a retirement.