National Average Wage Index: Earnings, Benefit Formula, Tax Cap

The National Average Wage Index is the yearly measure of nationwide earnings that Social Security uses to keep its dollar figures in step with the economy. The most recent value, published for 2024, is $69,846.57. That single number ripples through nearly every calculation the program performs: it adjusts your past earnings when SSA computes your benefit, it moves the bend points in the benefit formula each year, and it sets the ceiling on wages subject to the payroll tax. Established by the Social Security Amendments of 1977, the index has been published continuously since 1951.¹

How the Index Is Calculated

SSA builds the index from W-2 wage data reported to the IRS. The figures include wages subject to federal income taxes plus contributions to deferred compensation plans such as 401(k)s. The agency divides total national wages by the number of workers to get a per-worker average, then compares that average to the prior year’s to measure percentage growth. The current year’s index equals last year’s index multiplied by that growth rate. For 2024, SSA multiplied the 2023 index of $66,621.80 by the ratio of 2024 to 2023 average wages, producing $69,846.57.¹

Because SSA needs complete tax filings before it can finalize the number, each year’s index is published in the fall of the following year. The 2024 figure was released in October 2025. The lag is routine and doesn’t affect accuracy.

How the Index Adjusts Your Past Earnings

Before SSA can compute your monthly benefit, it has to translate decades of past wages into current-dollar equivalents. Twenty thousand dollars earned in 1985 represented a very different standard of living than twenty thousand dollars today, so the agency rescales each year’s earnings using the wage index. The result is your Average Indexed Monthly Earnings, or AIME, and it drives the entire benefit calculation.²

For a retirement claim, the indexing year is the year you turn 60, which is two years before you first become eligible at 62.² For every earlier year of earnings, SSA divides the index value for the year you turned 60 by the index value for the year you actually earned the wages. That ratio is your indexing factor, and multiplying it by your nominal earnings gives your indexed earnings for that year.

A concrete example. Say you earned $15,000 in a year when the index was $18,000, and you turned 60 in a year when the index was $69,000. Your indexing factor is $69,000 divided by $18,000, or roughly 3.83. Multiply $15,000 by 3.83 and you get indexed earnings of about $57,500. The adjustment preserves your relative position in the economy so decades of wage growth don’t make your early career look trivial.²

Earnings from the year you turn 60 onward carry an indexing factor of 1.0, so they enter the calculation at face value.² SSA then takes your highest 35 years of indexed earnings, sums them, and divides by 420 months to produce your AIME. If you worked fewer than 35 years, zeros fill the gaps and lower your average.

Disability and survivor claims use the same logic with a different anchor year. For disability, the indexing year is the second year before the onset of disability; for survivors, it is the second year before the worker’s death, with special rules when a surviving spouse files years later.³

How the Index Moves the Benefit Formula

Once SSA has your AIME, it runs the number through a three-tier formula to produce your Primary Insurance Amount, the monthly benefit you would receive at full retirement age.⁴ For workers who turn 62 in 2026, the formula pays:

90 percent of the first $1,286 of AIME
32 percent of AIME between $1,286 and $7,749
15 percent of any AIME above $7,749

The dollar thresholds where the percentages change are called bend points.⁵ The three percentages never change, but the bend points are recalculated every year based on growth in the wage index.⁴ Without the annual adjustment, wage growth would push more of each new retiree’s AIME into the 32 and 15 percent tiers, quietly shrinking the replacement rate over time. Moving the bend points with wages keeps the benefit structure roughly consistent from one generation to the next.

Your bend points are locked in permanently by the year you turn 62, even if you wait until 67 or 70 to file. Delaying still increases your benefit through delayed retirement credits, but the underlying formula uses the bend points from your year of first eligibility.

How the Index Sets the Payroll Tax Cap

The wage index also controls the contribution and benefit base, commonly called the taxable maximum. This is the ceiling on earnings subject to the 6.2 percent Social Security payroll tax that employees and employers each pay, and the 12.4 percent that self-employed workers pay on their own. For 2026, the taxable maximum is $184,500.⁶ Wages above that amount are not taxed for Social Security and don’t count toward your future benefit.

An employee earning at or above the cap in 2026 will contribute $11,439 in Social Security taxes, with the employer matching. A self-employed person at or above the cap owes $22,878 for the Social Security portion alone before the deduction for the employer-equivalent half.⁶ The Medicare portion of FICA has no cap.

Because the ceiling rises with the wage index, higher earners pay Social Security taxes on a gradually larger slice of income each year, and the maximum possible benefit rises in step, since only earnings up to the taxable maximum count in any given year.

Other Thresholds the Index Controls

The wage index sets most of the other dollar figures in the program too. To qualify for retirement benefits at all, you need 40 credits, which usually means about ten years of work; you can earn up to four credits a year. In 2026, one credit requires $1,890 in earnings, so $7,560 during the year maxes out your four credits.⁷⁸

Substantial gainful activity thresholds, which determine whether someone qualifies as disabled, are also indexed. For 2026 the monthly SGA limits are $1,690 for non-blind individuals and $2,830 for blind individuals; earnings above these amounts generally disqualify someone from disability benefits.⁹

The retirement earnings test uses the same mechanism. If you claim before full retirement age and keep working, SSA withholds $1 in benefits for every $2 you earn above $24,480 in 2026. A higher threshold of $65,160 applies in the calendar year you reach full retirement age, with $1 withheld for every $3 over the limit, and only earnings in the months before you hit full retirement age count.¹⁰ Once you reach full retirement age the test disappears entirely, and SSA permanently raises your monthly benefit to make up for the months when payments were reduced. Both thresholds rise each year with the wage index.

What Happens When Average Wages Fall

The index has increased in all but one year of its history. The exception was 2009, when the Great Recession pulled average wages down, and that decline exposed an asymmetry: not every indexed figure has the same downside protection. The taxable maximum cannot decrease. It holds at the prior year’s level until the index recovers enough to push it higher. The bend points, however, carry no such floor. When the 2009 wage index fell, the bend points for workers turning 62 in 2011 actually dropped, from $761 and $4,586 to $749 and $4,517.¹¹ Lower bend points push more of a worker’s AIME into the lower-replacement tiers, producing a smaller benefit. The effect was modest and has only happened once, but the system does not guarantee that each year’s formula will be at least as generous as the last.

Where Wage Indexing Ends and COLA Begins

The wage index plays no role once your benefits are in payment. At that point a separate mechanism takes over: the annual cost-of-living adjustment. While the wage index tracks earnings, the COLA tracks changes in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W).¹²

The split is deliberate. Wage indexing before retirement keeps your starting benefit in line with the living standards of the current workforce, so each generation begins at a level that reflects contemporary earnings. The COLA is designed to preserve the purchasing power of your check afterward, protecting a fixed monthly payment from inflation.¹³

For 2026, the COLA is 2.8 percent, raising monthly benefits for about 71 million beneficiaries starting in January.¹⁴ Unlike the bend points, the COLA cannot be negative; if prices fall, benefits stay flat until prices rise above the previous high-water mark.

1
Social Security Administration. National Average Wage Index
2
Social Security Administration. Benefit Calculation Examples for Workers Retiring in 2026
3
Social Security Administration. 20 CFR 404.211 – Computing Your Average Indexed Monthly Earnings
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eCFR. 20 CFR 404.212 – Computing Your Primary Insurance Amount
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Social Security Administration. Benefit Formula Bend Points
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Social Security Administration. Contribution and Benefit Base
7
Social Security Administration. Quarter of Coverage
8
Social Security Administration. Social Security Credits and Benefit Eligibility
9
Social Security Administration. Substantial Gainful Activity
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Social Security Administration. Retirement Earnings Test Exempt Amounts
11
Congressional Research Service. Social Security Benefits and the Effect of Declines in Average Wages
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Social Security Administration. Distributional Effects of Price Indexing Social Security Benefits
13
Office of the Law Revision Counsel. 42 USC 415 – Computation of Primary Insurance Amount
14
Social Security Administration. Social Security Announces 2.8 Percent Benefit Increase for 2026