When you claim Social Security is one of the most valuable, and most misunderstood, choices you’ll make in retirement. Most Americans eventually collect, and for many households, the program is the single largest source of guaranteed income. Yet a sizable share of retirees still file too early and lock in smaller checks for life when waiting would have produced far more income over time
How age changes your check
Social Security is designed around a “full retirement age” (FRA) generally 67 if you were born in 1960 or later. Claiming earlier than FRA permanently reduces your monthly benefit; claiming later increases it. The reduction follows a precise formula: 5/9 of 1% for each of the first 36 months you file before FRA, then 5/12 of 1% for up to another 24 months. For today’s 67 FRA, filing at 62 trims your benefit by about 30% for life. On the flip side, each month you delay after FRA earns delayed retirement credits that raise your payment, up to age 70, worth roughly 8% per year, about a 24% boost if you wait from 67 to 70 (SSA).
Real-world dollar figures make the gap tangible. In 2025, the maximum initial benefit for someone with a lifetime of payrolls at or above Social Security’s taxable wage base is $2,831 if claimed at 62, $4,018 at FRA, and $5,108 at 70 (SSA FAQ). That top-to-bottom spread illustrates how powerful timing is even though most people receive less than the maximum because their earnings histories weren’t at the cap
What the averages tell us at 62 versus 70
Averages by age confirm the same story. Among retired workers actually receiving benefits, the average monthly check at age 62 was $1,341.61 as of December 2024, while the average at age 70 was $2,148.12 roughly a 60% difference (SSA table of retired-worker beneficiaries by age). The overall retired-worker average across all ages was about $2,008 by August 2025, reflecting 2025’s 2.5% COLA
Those age-62 and age-70 averages include people with very different work histories, so they’re not a pure “early vs. late” experiment. But they do show what actually lands in bank accounts at those ages and why waiting, for many, results in materially larger deposits.
What the research says about the “best” age
Two threads of research point to the same conclusion: on paper, delaying to 70 often produces the highest lifetime value for the typical household. United Income’s landmark analysis found that only about 4% of retirees claim at the financially optimal time; about 57% would have been better off waiting until 70. Collectively, suboptimal timing leaves trillions on the table for current and future retirees
Academic work lines up. Shoven and Slavov (National Bureau of Economic Research) show that for reasonable real interest-rate assumptions, the primary earner in a married household should delay to 70 to maximize the present value of benefits, an insight that also strengthens survivor protection for the spouse who outlives the other
More recently, Altig et al. (NBER Working Paper 30675) quantified the dollar stakes using household-level data: across all households, the median increase in lifetime Social Security income from optimizing claiming decisions was about $158,000. For households ages 45–62, the median potential gain in lifetime benefits was about $226,000; even among ages 63–69, where timing options are narrower, the median gain was still more than $117,000.
Why does 70 so often win? Because Social Security’s delayed retirement credits are effectively risk-free, inflation-adjusted increases in a guaranteed lifetime income stream. In today’s interest-rate and longevity environment, the “implicit return” for the household particularly when you consider survivor benefits is hard to match elsewhere with the same certainty.
But averages and models aren’t your life
There are valid reasons to file before 70. Health and life expectancy matter: if your expected longevity is materially shorter than average, breakeven math shifts earlier. So do cash-flow needs in your 60s, job availability, and the state of your portfolio. Research also cautions against treating the 8% annual credit as a simple “investment return”, it’s an insurance decision too, trading a smaller near-term benefit for a larger, inflation-protected lifetime benefit
Married couples have extra levers. The higher earner’s claiming age sets the floor for a surviving spouse, because survivor benefits are generally based on the deceased worker’s benefit including any delayed retirement credits. In plain English: if the higher earner waits, the surviving spouse may inherit a larger check later.
Why so many still claim early
Behavior and misconceptions dominate here. Many people worry Social Security will “run out,” or they simply need the cash flow at 62. But the data show a persistent mismatch between what’s optimal and what people do. United Income found fewer than one in twenty retirees claimed at the best time for their finances; a majority would have been better off at 70. Other snapshots suggest the fraction waiting until 70 is still small, even though the average claiming age has crept up in recent years
So what age gets you the biggest check?
If you’re strictly asking about the monthly amount, age 70 is the answer. For workers with FRA 67, each year of delay from 67 to 70 adds about 8%, and credits stop accruing after 70, that’s when your check is maximized
If you’re asking about the likely lifetime total for a typical household, much of the empirical and academic literature points to 70 as well, especially for the higher earner in a couple. United Income estimates suggest substantial lifetime gains from optimizing timing, and NBER studies find the gains from delay have grown in the modern economy; in one large analysis, the median household stood to raise lifetime Social Security income on the order of $158,000 by optimizing, with median gains of roughly $226,000 for those aged 45–62
None of this means everyone should wait. If you have poor health, need income now, or have other strategic reasons (for example, carefully managing taxes and Medicare premiums in the years before RMDs), earlier filing can be sensible. But the default starting point, the age to beat, is 70 for the primary earner, because the odds favor higher lifetime value and better survivor protection in common scenarios
Putting the data to work in your plan
Translate the numbers to your situation. Start with your own estimate: log in to my Social Security and view your personalized benefit at 62, FRA, and 70. Run a quick “what-if” with both spouses, noting how the survivor benefit changes if the higher earner delays. Then sanity-check the averages: remember that a typical 62-year-old’s check was about $1,342 at the end of 2024, versus roughly $2,148 at age 70 and the 2025 average across all retired workers sits near $2,008
Next, layer in health, work prospects, and taxes. If delaying means spending down savings, the relevant comparison isn’t just “8% vs. investment return”, it’s the value of securing a larger, inflation-adjusted, guaranteed payment for life. That insurance value is why so many studies, using different models and datasets, keep arriving at the same place: for most households, waiting, especially having the higher earner wait, is the strongest move
Bottom line
Age 70 generally produces the biggest monthly check and, for many, the largest lifetime payout. The data are clear on the direction and size of the timing effect, a roughly 30% haircut at 62 versus FRA, and roughly a 24% bonus by delaying to 70, and current averages by age underscore how much more retirees receive when they wait
Still, “optimal” on paper isn’t universal. Health, longevity, cash-flow needs, employment, and taxes can tilt the decision earlier. The practical approach is to begin with 70 as your default target, pressure-test it against your real-world constraints, and, ideally, run the numbers with a fee-only planner who can coordinate Social Security with the rest of your retirement plan before you file. If you do, you’re far more likely to land on the claiming age that maximizes your lifetime income, not just the size of next month’s check.
