62, 67, or 70 — the age you choose changes your monthly check for life. Here’s how to think about the decision instead of guessing.

Of all the decisions in a federal retirement plan, Social Security timing gets the least attention and carries some of the biggest consequences. Once you claim, the amount is locked in for the rest of your life — outside of a narrow window to withdraw the application.

The Three Ages That Matter

Age 62 is the earliest you can claim — and the check is permanently reduced, often by around 25–30% compared to full retirement age.

Full Retirement Age (66–67, depending on birth year) is when you receive 100% of your calculated benefit.

Age 70 is the latest it makes sense to wait — each year past full retirement age adds roughly 8% to the monthly amount, and that stops accruing at 70.

Why Federal Employees Should Think About This Differently

Because FERS already provides a pension, Social Security isn’t your only source of guaranteed income the way it is for many private-sector retirees. That changes the math. Some federal retirees can afford to wait for the larger check because the pension covers near-term needs. Others need the income sooner. There’s no single right answer — only the right answer for your specific pension, TSP balance, and health outlook.

Health and Family History Matter More Than People Expect

Claiming later only pays off if you live long enough to benefit from the higher check. Family longevity, current health, and whether a spouse would rely on survivor benefits all belong in this decision — not just the monthly dollar amount.

Married? There’s a Second Decision Hiding Here

For married couples, one spouse’s claiming age can affect the other’s survivor benefit down the road. This is one of the most overlooked pieces of the decision — and one of the easiest to get wrong without walking through the numbers together.

The Takeaway

There’s no universal “best age” to claim Social Security. There’s a best age for your pension amount, your TSP balance, your health, and your household. Getting those pieces on the table before you decide is worth far more than picking a number because it “felt right.”