Know your AIME (or want to estimate it)? Run the 2026 formula on your own numbers and see your PIA, your replacement rate, and the check at 62 and 70.
Open the Social Security PIA Calculator →Social Security computes your benefit in four steps: it indexes your earnings to national wage growth, averages your highest 35 years into average indexed monthly earnings (AIME), then applies the benefit formula - for 2026 eligibility, 90% of the first $1,286 of AIME, 32% up to $7,749, and 15% above - rounding down to the next lower ten cents to produce your primary insurance amount (PIA). The PIA is the benefit at full retirement age; claiming at 62 trims about 30%, waiting to 70 adds 24%, and COLAs (2.8% for 2026) compound from the year you turn 62 whether or not you have claimed.
- AIME = highest 35 years of wage-indexed earnings, divided by 420 months, rounded down to the dollar.
- 2026 PIA bend points: $1,286 and $7,749 (2025: $1,226 / $7,391); the 90/32/15 percentages are fixed by law.
- Your bend points lock at 62 (or at disability/death before 62) and never migrate to a later year.
- Fewer than 35 working years = zeros in the average; each extra year of work replaces a zero.
- The formula is progressive: ~90% replacement for the lowest earners, about 29% for the 2026 maximum earner (AIME $14,358, PIA $4,216.90).
- COLAs start at eligibility, not at claiming - delaying does not forfeit them.
- Spousal (up to 50%) and survivor (up to 100%) benefits are computed from the PIA, not from the reduced check.
How Is Social Security Calculated? The Four-Step Pipeline
Every Social Security retirement benefit comes out of the same four-step computation, run by the Social Security Administration when you become eligible at 62 and refined until you claim:
- Step 1 - Index your earnings. Each year of covered wages is scaled up by national wage growth so a 1995 paycheck counts at something close to today's wage levels.
- Step 2 - Average the best 35 years. The highest 35 years of indexed earnings are summed and divided by 420 months. The result, rounded down to the next lower dollar, is your AIME.
- Step 3 - Apply the bend-point formula. The AIME is split at two dollar thresholds (the bend points) and replaced at 90%, 32%, and 15% respectively. Rounded down to the next lower ten cents, that is your PIA.
- Step 4 - Adjust for claiming age and COLAs. The PIA is what you get at full retirement age. Claim earlier and the check is reduced; claim later and delayed-retirement credits raise it; COLAs compound on top from the eligibility year.
The rest of this guide takes each step in turn. To see the math on your own numbers as you read, keep the PIA Calculator open alongside.
What Is AIME - Average Indexed Monthly Earnings?
AIME is the single number that summarizes your earning career. SSA starts with your covered earnings for every year you worked - wages up to the annual taxable maximum ($184,500 in 2026) - and multiplies each year by an indexing factor: the national average wage index for the year you turn 60, divided by the index for the earnings year. Earnings in the year you turn 60 and later count at face value.
From the indexed list, SSA takes the highest 35 years, adds them up, and divides by 420 - the number of months in 35 years - then rounds down to the next lower dollar. Three practical consequences follow:
- Zeros hurt. With fewer than 35 years of earnings, the sum is still divided by 420, so every missing year enters as a zero and dilutes the average.
- Extra years help only at the margin. Past 35 years, a new year of work raises the AIME only if it out-earns (after indexing) the lowest year currently in the top 35.
- Above-cap earnings never count. Income over the taxable maximum was never taxed for Social Security and never enters the AIME.
Because indexing runs on the national average wage index through the year you turn 60, your final AIME cannot be pinned down exactly until that index is published - one reason SSA statement estimates drift slightly from year to year.
The 2026 Formula: 90% / 32% / 15% at the Bend Points
For a worker first eligible in 2026, the primary insurance amount is:
- 90% of the first $1,286 of AIME, plus
- 32% of AIME between $1,286 and $7,749, plus
- 15% of AIME above $7,749.
The sum is rounded down to the next lower multiple of ten cents. The two dollar thresholds are the bend points - so called because the formula, graphed, bends at those amounts. The percentages are written into Social Security Act §215(a)(1)(A) and never change; the bend points are recomputed each year from the national average wage index (for 2026: the 1979 base amounts of $180 and $1,085, indexed by the ratio of the 2024 AWI of $69,846.57 to the 1977 AWI of $9,779.44).
The same bend-point machinery drives the family maximum formula, which caps what a whole household can draw on one record - but that formula uses different bend points and percentages (150/272/134/175).
Worked Examples: From AIME to PIA
SSA publishes an official 2026 anchor: a worker with maximum taxable earnings every year since age 22, turning 62 in 2026, has an AIME of $14,358 and a PIA of $4,216.90. Here is that computation next to two more typical careers:
| Formula slice | AIME $1,200 | AIME $6,000 | AIME $14,358 (max) |
|---|---|---|---|
| 90% of first $1,286 | $1,080.00 | $1,157.40 | $1,157.40 |
| 32% of $1,286-$7,749 | $0 | $1,508.48 | $2,068.16 |
| 15% over $7,749 | $0 | $0 | $991.35 |
| PIA (rounded down to 10¢) | $1,080.00 | $2,665.80 | $4,216.90 |
| Replacement rate | 90.0% | 44.4% | 29.4% |
Notice the pattern: twelve times the earnings of the low earner produces roughly four times the benefit. That compression is the formula's progressive design doing its job. Run any AIME through the PIA Calculator to see your own slice-by-slice breakdown.
PIA Bend Points by Year
Bend points are published annually by SSA's Office of the Chief Actuary. Recent years:
| Year of eligibility | First bend point | Second bend point |
|---|---|---|
| 2020 | $960 | $5,785 |
| 2021 | $996 | $6,002 |
| 2022 | $1,024 | $6,172 |
| 2023 | $1,115 | $6,721 |
| 2024 | $1,174 | $7,078 |
| 2025 | $1,226 | $7,391 |
| 2026 | $1,286 | $7,749 |
Rising bend points are not a benefit cut or increase by themselves - they simply keep the brackets aligned with national wage levels, the same way the AIME indexing does on the earnings side.
Which Year's Formula Applies to You
The bend points that govern your PIA come from your year of eligibility: the year you turn 62, or the year you become disabled or die before 62. They lock in at that point. A worker who turns 62 in 2026 uses $1,286 / $7,749 forever - claiming at 67 or 70 does not migrate the computation to a later year's bend points.
This surprises people because the SSA statement shows benefit estimates growing over time. The growth comes from two other sources: additional earnings still flowing into the highest-35 average, and cost-of-living adjustments applied to the PIA from the eligibility year forward (next section) - not from newer bend points.
For a disabled worker the same principle applies at the disability onset: someone disabled in 2026 at age 45 uses the 2026 bend points, and the AIME may be averaged over fewer than 35 years under the disability computation rules.
COLAs Start at 62 - Even if You Have Not Claimed
Once you reach your eligibility year, every annual cost-of-living adjustment is applied to your PIA whether or not you have started benefits. The COLA effective for December 2026 (payable January 2027) is the first one a 2026-eligible worker receives; the 2026 COLA itself - the one that raised existing beneficiaries' checks in January 2026 - is 2.8%.
This is why "wait and it grows 8% a year" understates the case. A worker who turns 62 in 2026 and claims at 70 in 2034 gets the delayed-retirement credits and eight years of compounded COLAs on the PIA. The two effects multiply; neither is forfeited by waiting.
COLAs also protect the household benefits keyed to your record: a spousal benefit of 50% of the PIA and a survivor benefit of up to 100% both float upward with the same adjustments. See how those are built in the Spousal & Survivor Benefits Guide.
PIA vs the Check You Actually Receive
The PIA is the benefit at your full retirement age - 67 for anyone born in 1960 or later. The age you actually start benefits then moves the check around the PIA:
- Claiming at 62 (FRA 67): a 30% reduction - a $2,665.80 PIA pays about $1,866.06.
- Claiming at FRA: exactly the PIA (before COLAs and final rounding).
- Claiming at 70: delayed-retirement credits of 8% per year add 24% - the same PIA pays about $3,305.59.
The reduction runs 5/9 of 1% per month for the first 36 months before FRA and 5/12 of 1% per month beyond; the delayed credit accrues 2/3 of 1% per month after FRA up to age 70. SSA rounds the final payable amount down to a whole dollar.
Which age is best is a longevity and cash-flow decision, not a formula question - work it through with the Social Security Break-Even Calculator and the Claiming Age Guide. And if you claim before FRA while still working, the earnings test can temporarily withhold checks on top of the reduction.
Why the Formula Is Progressive
The 90/32/15 structure is deliberate social insurance design: it replaces a much larger share of pre-retirement earnings for workers who earned less. The first dollars of AIME come back at 90 cents each; dollars above the second bend point come back at 15 cents.
In replacement-rate terms, the 2026 spread runs from 90% for a worker entirely inside the first bracket down to about 29% for the maximum-earnings worker. A middle earner with a $6,000 AIME lands at roughly 44%. Higher earners always receive a larger dollar benefit - the formula never bends backward - but each additional dollar of career earnings buys less benefit than the one before.
Two planning corollaries follow. For lower earners, Social Security is proportionally the most valuable retirement asset they own, which raises the stakes of claiming-age mistakes. For higher earners, the 15% bracket means late-career earnings barely move the benefit, so decisions like working one more year should be judged mostly on their own merits, not on a hoped-for benefit bump.
How to Raise Your PIA
Only two inputs matter - the AIME and the bend-point year - and only the AIME is in your control:
- Fill the zeros first. If you have fewer than 35 earning years, each additional year replaces a zero in the average. This is the highest-leverage move in the system: ten zero years turn a $65,000-average career's estimated AIME from $5,416 into $3,869 and the PIA from $2,479.00 to $1,983.90.
- Out-earn your worst indexed year. Past 35 years, new earnings help only by displacing the lowest year in the top 35 - often a real but small gain.
- Check your earnings record. Missing or misreported wages at ssa.gov/myaccount directly shrink the AIME; correcting the record is free benefit.
- Remember what does not help: earnings above the taxable maximum, and waiting to claim (that raises the check via credits, not the PIA via bend points).
A higher PIA also lifts everything built on it: the 50% spousal benefit, the up-to-100% survivor benefit, and the family maximum ceiling for the whole household.
Where to Find Your AIME and PIA
Your Social Security Statement at ssa.gov/myaccount shows your year-by-year earnings record and personalized benefit estimates at 62, FRA, and 70. The statement presents the estimates rather than the raw AIME; the estimates embed the formula on this page plus assumptions about your future earnings.
To approximate your AIME from the statement, take the FRA estimate and run the formula backward - or simpler, use the earnings-based estimator in the PIA Calculator and compare its output to the statement's FRA figure. If the two are close, your inputs are realistic; a big gap usually means uneven earnings or missing years the flat-average shortcut cannot see.
SSA's own detailed calculators (Quick Calculator, Online Calculator, and the downloadable AnyPIA program) run the exact year-by-year computation with your real earnings record and are the final word before a claiming decision.
Put your AIME - or a career-average salary - through the exact 2026 formula and see your PIA, replacement rate, and the check at 62 and 70.
Open the Social Security PIA Calculator →Practitioner Insight (LMN Tax Inc.)
The single most productive fifteen minutes in retirement planning is pulling the client's actual earnings record at ssa.gov/myaccount and counting the zeros. People remember their careers as continuous; the record frequently says otherwise - caregiving years, overseas years, cash-economy years, a forgotten employer that never reported. Every zero inside the top 35 is a dial we can still turn, and clients are routinely shocked at how much one or two replaced zeros move the PIA.
The second habit we push: think in PIA, not in "my check." The check is the PIA filtered through a claiming age, which makes it a moving target and confuses every household conversation. The spousal benefit is 50% of the PIA. The survivor benefit tops out at 100% of what the worker was entitled to. The family maximum is a function of the PIA. Once a couple knows both PIAs, every downstream decision - who claims when, what the survivor keeps - becomes arithmetic instead of folklore.
For high earners we deliberately deflate expectations about late-career income. Above the second bend point, a dollar of AIME buys 15 cents of PIA, and a big final-year bonus might not even crack the top 35 after indexing. The benefit case for "one more year" is usually weak; the portfolio case may still be strong, but they should be argued separately.
And for anyone who spent years in non-covered government work: the old Windfall Elimination Provision haircut is gone - repealed by the Social Security Fairness Act - so statements and old rules of thumb from before the repeal understate what those clients will now receive. Re-run the numbers under the standard formula; the difference is sometimes hundreds of dollars a month.
Real-World Scenarios
When the Rules Differ
- Disability and young-death computations. Eligibility can arrive decades before 62, locking that year's bend points, and the averaging period may be shorter than 35 years under the disability rules.
- The WEP era is over. The Windfall Elimination Provision, which replaced the 90% factor for workers with non-covered government pensions, was repealed by the Social Security Fairness Act along with the Government Pension Offset; SSA has adjusted affected benefits. Pre-repeal estimates for those workers are stale.
- Special minimum PIA. A small group of long-career, very-low-wage workers is computed under the special minimum table instead of the 90/32/15 formula.
- Pre-1979 eligibility. Workers eligible before 1979 fall under older benefit-table computations, not the bend-point formula.
- Working after claiming. New earnings that crack your top 35 trigger an automatic recomputation upward; the earnings test can separately withhold checks before FRA.
- Estimator limits. The flat-average AIME shortcut in the paired calculator ignores real year-by-year indexing; treat SSA's own record-based tools as the final authority.
Frequently Asked Questions
What to Do Next
Enter your AIME - or estimate it from a career-average salary - in the Social Security PIA Calculator and check the slice-by-slice breakdown against your SSA statement.
Pull your statement at ssa.gov/myaccount, count the zero years inside your top 35, and fix any missing wages. Replacing zeros is the fastest PIA raise available.
Compare 62 vs FRA vs 70 on lifetime dollars with the Break-Even Calculator and the Claiming Age Guide; if you will work before FRA, check the Earnings Test Calculator too.
Model the benefits built on your PIA with the Spousal & Survivor Calculator and the Family Maximum Calculator, then estimate the tax bite with the Social Security Tax Calculator.
Related Tools and Guides
- SSA - Primary Insurance Amount - The 2026 PIA formula (90/32/15 at $1,286 / $7,749), the round-down-to-ten-cents rule, and the bend-point computation from the average wage index.
- SSA - Benefit Formula Bend Points - The historical PIA bend-point table (2020-2026 values shown above).
- SSA - Social Security Benefit Amounts - The AIME definition (highest 35 years, divided by total months, rounded down to the dollar), the 2026 maximum-earner example (AIME $14,358, PIA $4,216.90), and the 30% reduction at 62.
- SSA - Retirement Benefit Calculation Examples - Year-by-year indexing factors (AWI of the age-60 year over each earlier year) and the highest-35 selection with dropped years.
- Social Security Act §215 [42 U.S.C. 415] - The statutory 90/32/15 formula in §215(a)(1)(A).
- SSA - COLA Information for 2026 - The 2.8% cost-of-living adjustment and the $184,500 taxable maximum for 2026.
- SSA - Social Security Fairness Act - The repeal of the Windfall Elimination Provision and Government Pension Offset.