How Social Security Benefits Are Calculated
Social Security retirement benefits are based on your 35 highest-earning years. The SSA adjusts past earnings for wage inflation, then calculates your Average Indexed Monthly Earnings (AIME). A progressive formula with "bend points" converts AIME into your Primary Insurance Amount (PIA) — the benefit you receive at full retirement age. Claiming early (as early as age 62) permanently reduces your benefit, while delaying past FRA (up to age 70) earns delayed retirement credits of 8% per year.
2026 Benefit Amounts
| Claiming Age | Max Monthly Benefit | Notes |
|---|---|---|
| Age 62 (early) | $2,831 | Permanently reduced by ~30% |
| Age 67 (FRA) | $4,018 | Full primary insurance amount |
| Age 70 (delayed) | $5,108 | 124% of PIA (8%/yr delayed credits) |
| Average retiree | ~$1,976 | Typical retired worker benefit |
2026 COLA Adjustment
The 2026 cost-of-living adjustment (COLA) is 2.5%, applied to all Social Security and SSI benefits beginning in January 2026. COLA is calculated based on the Consumer Price Index for Urban Wage Earners (CPI-W) from the third quarter of the prior year. This adjustment helps benefits keep pace with inflation, though critics note that CPI-W may not fully reflect the spending patterns of retirees.
Earnings Test Thresholds
If you collect Social Security before reaching full retirement age and continue working, an earnings test may temporarily reduce your benefits:
| Situation | Earnings Limit | Withholding |
|---|---|---|
| Under FRA (entire year) | $23,400/year | $1 withheld per $2 above limit |
| Year you reach FRA | $62,160/year | $1 withheld per $3 above limit |
| Month you reach FRA and after | No limit | No withholding |
Benefits withheld by the earnings test are not lost permanently. Once you reach FRA, the SSA recalculates your benefit upward to account for months benefits were withheld.
Taxation of Social Security Benefits
Your Social Security benefits may be partially taxable depending on your "combined income" (adjusted gross income + nontaxable interest + half of your SS benefits):
| Filing Status | Combined Income | % of Benefits Taxable |
|---|---|---|
| Single | Below $25,000 | 0% |
| Single | $25,000 – $34,000 | Up to 50% |
| Single | Above $34,000 | Up to 85% |
| Married Filing Jointly | Below $32,000 | 0% |
| Married Filing Jointly | $32,000 – $44,000 | Up to 50% |
| Married Filing Jointly | Above $44,000 | Up to 85% |
Note: These thresholds have not been adjusted for inflation since 1993, meaning more retirees pay tax on benefits each year.
Maximum Taxable Earnings (SS Wage Base)
In 2026, the maximum earnings subject to the Social Security payroll tax (6.2% employee / 6.2% employer) is $176,100. Earnings above this amount are not subject to the Social Security portion of FICA, though the 1.45% Medicare tax has no wage cap.
Full Retirement Age by Birth Year
| Birth Year | Full Retirement Age |
|---|---|
| 1943 – 1954 | 66 |
| 1955 | 66 and 2 months |
| 1956 | 66 and 4 months |
| 1957 | 66 and 6 months |
| 1958 | 66 and 8 months |
| 1959 | 66 and 10 months |
| 1960 and later | 67 |
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What is the 2026 Social Security COLA increase?
The 2026 Social Security cost-of-living adjustment (COLA) is 2.5%. This increase is applied automatically to all Social Security and SSI benefits starting in January 2026, and is based on the CPI-W index from Q3 2025.
What is the maximum Social Security benefit in 2026?
The maximum monthly benefit depends on when you claim. At age 62 (earliest): $2,831/month. At full retirement age (67): $4,018/month. At age 70 (maximum delayed credits): $5,108/month. These maximums require 35+ years of earnings at or above the taxable maximum.
How much can I earn while receiving Social Security in 2026?
If you are under full retirement age for the entire year, $1 in benefits is withheld for every $2 earned above $23,400. In the year you reach FRA, $1 is withheld for every $3 earned above $62,160. Once you reach FRA, there is no earnings limit and withheld benefits are recalculated into a higher monthly amount.
Are Social Security benefits taxable in 2026?
Up to 85% of your Social Security benefits may be subject to federal income tax, depending on your combined income (AGI + nontaxable interest + half of SS benefits). For single filers, taxation begins at $25,000 combined income. For married filing jointly, it begins at $32,000. These thresholds are not inflation-indexed.