Social Security Benefits Explained 2026

Social Security replaces only about 40% of pre-retirement earnings for the average worker, yet it's the single largest income source for a huge share of American retirees, and the age you claim it permanently changes how much you get for the rest of your life. This guide covers how benefits are actually calculated, what claiming at 62 versus 67 versus 70 really costs or gains you, the full 2026 numbers (COLA, taxable wage base, earnings test), and how benefits get taxed.

Full Retirement Age (FRA): 67 for Almost Everyone Now

Full retirement age has been rising gradually since a 1983 law began phasing it up from 65, and it's now fully phased in at 67 for anyone born in 1960 or later, essentially everyone claiming benefits for the first time in the years ahead.

How Your Benefit Is Actually Calculated: AIME and PIA

The Social Security Administration doesn't just average your salary. It runs your earnings history through a specific formula:

1. Calculate your AIME (Average Indexed Monthly Earnings). The SSA takes your 35 highest-earning years, adjusts each year's earnings for wage inflation, adds them up, and divides by 420 months (35 years). If you worked fewer than 35 years, the missing years count as zero, which drags the average down significantly.
2. Apply the PIA formula using 2026 bend points. Your AIME is run through a three-bracket formula: 90% of the first $1,286, plus 32% of the amount between $1,286 and $7,749, plus 15% of anything above $7,749. This produces your Primary Insurance Amount (PIA), the benefit you'd receive if you claimed exactly at full retirement age.

Worked example: a worker with an AIME of $6,000/month. Since this falls below the second bend point of $7,749, only the first two brackets apply: 90% of $1,286 ($1,157.40) plus 32% of the remaining $4,714 ($1,508.48), for a PIA of $2,665.88, rounded down to the nearest dime by SSA convention. This is what this worker would receive per month if they claimed exactly at full retirement age.

Notice the formula's design: someone with a lower AIME gets a much higher percentage of their earnings replaced (90% on the first slice) than someone with a high AIME (only 15% on earnings above $7,749). This progressive structure means Social Security replaces a larger share of income for lower earners than for higher earners, by design.

Claiming Age: The Decision That Locks In for Life

Once you file, your base benefit (aside from annual COLA increases) is locked in permanently. There is no do-over.

*These maximums assume the worker earned at or above the Social Security taxable maximum every single year starting at age 22, an unusually high bar very few people actually clear. The average retired worker received $2,071/month in January 2026, far below any of these ceilings; use these figures to understand the shape of the claiming-age effect, not as a personal estimate.

No delayed retirement credits are earned past age 70, so there's no benefit to waiting beyond that birthday. The reduction for claiming early phases in gradually rather than jumping straight to the maximum cut: the first 36 months early cost 5/9 of 1% per month, and any additional months beyond that cost 5/12 of 1% per month, which is how the extra two years for someone with FRA 67 (60 months early at age 62) compound to the full reduction seen above.

2026 Key Numbers at a Glance

The earnings test only applies if you're still working and claiming benefits before full retirement age; it disappears entirely once you reach FRA, and withheld amounts aren't lost forever, they're credited back into your benefit calculation once you hit full retirement age.

How Social Security Benefits Get Taxed

Up to 85% of your Social Security benefit can be subject to federal income tax, depending on your combined income (adjusted gross income, plus nontaxable interest, plus half of your Social Security benefit for the year).

These thresholds have never been adjusted for inflation since they were set by Congress in 1993. As wages and COLA increases push nominal incomes higher every year, a growing share of retirees get pulled into paying tax on benefits that would have been entirely tax-free decades ago, purely because the thresholds themselves haven't moved.

Spousal and Survivor Benefits: The Basics

A spouse who never worked, or who earned much less than their partner, can claim a spousal benefit worth up to 50% of the higher earner's PIA (claimed at the spouse's own full retirement age; claiming early reduces this too). A surviving spouse can claim a survivor benefit worth up to 100% of the deceased spouse's benefit, including any delayed retirement credits the deceased had earned, which is one reason a higher earner delaying their own claim to 70 can meaningfully protect a surviving spouse's future income, not just their own.

Common Mistakes People Make

• Assuming a flat "70% cut" applies at 62 for everyone. The exact reduction depends on your specific full retirement age and how many months early you claim; it's roughly 71.5% of PIA for anyone with FRA 67, not a flat 70%.
• Not accounting for the earnings test if still working. Claiming early while continuing to work above the earnings limit doesn't forfeit that money forever, but it does create a cash-flow gap until the credit is applied at FRA, which catches people off guard.
• Forgetting fewer than 35 working years drags down the average. Since AIME divides by 420 months regardless of how many years you actually worked, missing years count as zero and can meaningfully lower your benefit versus working a full 35-year career.
• Ignoring survivor benefit implications when deciding when to claim. A higher earner's decision to delay to 70 doesn't just affect their own check, it sets the floor for what a surviving spouse could eventually receive.
• Not checking your actual earnings record for errors. A missing or misreported year of earnings lowers your AIME permanently; verify your record at SSA.gov/myaccount periodically, well before you plan to claim.

Get a personalized estimate of your own retirement income with the Retirement Calculator, and confirm your official projected benefit at ages 62, 67, and 70 at SSA.gov/myaccount.

Frequently Asked Questions