Your full retirement age is the single most important number in Social Security planning, and most people get it wrong. They assume it’s 65 — the number that lived in America’s collective consciousness for decades. It’s not. For anyone born in 1960 or later, full retirement age is 67. And the difference between claiming at the right time and the wrong time can be worth hundreds of thousands of dollars over a lifetime.

Full retirement age (FRA) is the age at which you are entitled to receive 100 percent of your calculated Social Security benefit — your Primary Insurance Amount (PIA). Claim before FRA, and your benefit is permanently reduced. Claim after FRA, and your benefit is permanently increased. The word “permanently” is doing heavy lifting in both sentences.

What Is Full Retirement Age?

Full retirement age is determined by your birth year. Congress set these ages when it reformed Social Security in 1983, and they have not changed since:

Born 1943-1954: FRA is 66. Born 1955: FRA is 66 and 2 months. Born 1956: FRA is 66 and 4 months. Born 1957: FRA is 66 and 6 months. Born 1958: FRA is 66 and 8 months. Born 1959: FRA is 66 and 10 months. Born 1960 or later: FRA is 67.

If you were born in 1960 or later — which includes everyone currently under age 66 — your full retirement age is 67. This is the baseline against which all early or delayed claiming decisions are measured.

There is currently legislative discussion about potentially raising the full retirement age further, reflecting increased life expectancy and Social Security’s long-term funding challenges. The Social Security Fairness Act addressed benefit calculations for public employees, but the fundamental retirement age structure remains unchanged as of 2026.

What Happens If You Claim Early

You can begin receiving Social Security benefits as early as age 62. Many people do — roughly one-third of all beneficiaries claim at 62 or shortly after. But early claiming carries a permanent reduction in your monthly benefit.

The reduction formula works like this: for each month you claim before your full retirement age, your benefit is reduced by a specific percentage. The reduction is 5/9 of 1 percent per month for the first 36 months before FRA, and 5/12 of 1 percent per month for any additional months beyond 36.

In practical terms, for someone with a FRA of 67:

Claiming at 62: benefit reduced by 30 percent. Claiming at 63: benefit reduced by 25 percent. Claiming at 64: benefit reduced by 20 percent. Claiming at 65: benefit reduced by 13.3 percent. Claiming at 66: benefit reduced by 6.7 percent. Claiming at 67 (FRA): full benefit — no reduction.

These reductions are permanent. They do not go away when you reach full retirement age. If you claim at 62 and accept a 30 percent reduction, that reduction applies to every check you receive for the rest of your life. It also applies to your cost-of-living adjustments (COLAs), which are calculated on the reduced base.

The math is stark: a worker entitled to $2,000/month at FRA would receive only $1,400/month by claiming at 62 — a difference of $600 per month, $7,200 per year, for life.

What Happens If You Delay Past FRA

If early claiming reduces your benefit, delayed claiming increases it — and the increase is generous. For every month you delay claiming Social Security beyond your full retirement age, your benefit grows by 2/3 of 1 percent. That’s 8 percent per year.

Delaying from 67 to 70 increases your benefit by 24 percent. A $2,000/month benefit at FRA becomes $2,480/month at 70 — permanently. With COLAs applied on the higher base, the gap between FRA claiming and age-70 claiming widens every year for the rest of your life.

The delayed retirement credit stops at age 70. There is no financial benefit to delaying past 70. If you haven’t claimed by your 70th birthday, do so immediately.

When Early Claiming Makes Sense

Despite the mathematical advantage of waiting, claiming early is not always wrong. Several situations legitimately favor early claiming:

Health concerns. If you have a shortened life expectancy due to serious illness or family history, claiming early captures more total benefits. The “break-even” age — where total benefits from delayed claiming exceed total benefits from early claiming — is typically around 80-82. If you don’t expect to reach that age, claiming earlier maximizes your total lifetime benefits.

Immediate financial need. If you cannot meet basic living expenses without Social Security and have no other income source, claiming early is not a choice — it’s a necessity. Financial survival takes priority over optimization.

Spouse with higher earnings. In married couples where one spouse has significantly higher lifetime earnings, the lower-earning spouse may claim early while the higher earner delays to 70. This provides household income while maximizing the larger benefit (which also becomes the survivor benefit after one spouse dies).

Portfolio preservation. Some early retirees claim Social Security to avoid drawing down investment portfolios during market downturns. This is a legitimate strategy if it prevents selling assets at depressed prices, though the math must be run carefully.

When Delaying Makes Sense

Good health and longevity. If you’re healthy, have longevity in your family, and expect to live past 82, delaying to 70 almost certainly maximizes your lifetime benefits.

You’re still working. If you claim Social Security before FRA while still earning substantial income, the earnings test reduces your benefits. In 2026, if you’re under FRA and earn more than the exempt amount (approximately $22,320), Social Security withholds $1 for every $2 earned above that threshold. If you’re working and earning a good salary, claiming early makes little sense.

Survivor benefit maximization. The survivor benefit that your spouse receives after your death is based on your benefit amount. Delaying to 70 maximizes not only your lifetime benefit but also the survivor benefit your spouse will depend on — potentially for decades after your death.

Tax efficiency. Some retirees delay Social Security while performing Roth IRA conversions during the low-income years between retirement and claiming. This strategy takes advantage of lower brackets during the conversion years and higher tax-free income once Social Security begins.

The Spousal Benefit

Spousal benefits add complexity to the full retirement age calculation. A spouse can receive up to 50 percent of the higher-earning partner’s PIA, but only if claiming at their own full retirement age. Claiming spousal benefits early triggers the same permanent reduction formula described above.

The optimal claiming strategy for married couples often involves both spouses’ ages, relative earnings, health status, and survivor benefit considerations. In many cases, the mathematically optimal strategy has the higher earner delay to 70 while the lower earner claims at FRA or earlier.

The Break-Even Calculation

The break-even age is when total cumulative benefits from delayed claiming first exceed total cumulative benefits from early claiming. Before the break-even age, the early claimer has received more total money. After break-even, the delayed claimer pulls ahead — and the gap widens every year thereafter.

For most people, the break-even between claiming at 62 versus 67 falls around age 78-80. The break-even between 67 and 70 falls around 80-82. If you live past these ages — and current life expectancy data suggests most healthy 62-year-olds will — delaying is the better mathematical bet.

But math is not the only consideration. Cash flow needs, health, employment status, tax planning, and personal preferences all legitimately factor into the decision.

What Full Retirement Age Means for Planning

Your full retirement age is not a recommendation to retire at that age. It is a reference point for benefit calculations. You can retire at 55 and claim Social Security at 70. You can work until 72 and claim at 62. The retirement decision and the claiming decision are separate, and decoupling them gives you the most flexibility to optimize both.

The best approach is to build a retirement plan that considers Social Security as one component — alongside investment income, pensions, savings, and part-time work — rather than the foundation. The more financial flexibility you have, the more you can afford to delay claiming, which in turn increases the guaranteed income floor that Social Security provides for the rest of your life.

Full retirement age is 67 for most working Americans today. But the right age to claim is the one that fits your health, your finances, and your plan — not a number Congress chose four decades ago.