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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Social Security does not simply average every dollar you have earned. For a typical retired-worker benefit, the Social Security Administration (SSA) takes covered earnings in your record, adjusts older wages using national average wage growth, uses your highest 35 years to calculate average indexed monthly earnings (AIME), applies a progressive primary insurance amount (PIA) formula, and then adjusts that amount for the age at which you claim. Cost-of-living adjustments (COLAs), rounding, and other rules affect the amount ultimately payable.
The calculation in five stages
Your work history is the input to a sequence of calculations rather than a direct lifetime average:
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- Covered earnings: SSA starts with the wages and self-employment income posted to your earnings record.
- Wage indexing: Earlier earnings are adjusted to reflect changes in national wage levels.
- AIME: SSA selects the highest 35 years of indexed earnings, converts them to months, and averages them.
- PIA: A progressive formula applies three percentages to portions of your AIME. The thresholds (bend points) depend on the year you first become eligible.
- Payable benefit: Your PIA is adjusted for your claiming age and then affected by COLAs and applicable rounding rules.
The result is individualized. A reliable estimate requires your complete earnings record, date of birth, eligibility year, intended claiming age, and any assumptions about future work.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsStep 1: Start with the earnings record SSA has for you
SSA can calculate only from earnings credited to your record. Review the year-by-year history in your my Social Security account before relying on an estimate. Look for missing years, wages that appear too low, and self-employment income that is absent or misreported. The official calculation materials explain the method, but correction procedures depend on your circumstances; use SSA’s account and contact options for instructions specific to your record.
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Only earnings covered by Social Security count. A paycheck amount that was not subject to Social Security taxes does not enter this retirement formula, and the record is not a list of the benefit you will receive. It is the underlying data from which SSA derives AIME and PIA.
Step 2: SSA wage-indexes earlier earnings
A dollar earned decades ago is not compared with a current dollar at its original face value. SSA uses a national average wage indexing series so that earlier wages are evaluated in relation to the wage level near the time a worker becomes eligible. SSA describes the process this way: “When we compute a person’s benefit, we use the national average wage indexing series to index that person’s earnings.” See the Indexing Factors for Earnings table for the published factors.
Which year controls the indexing?
For a retirement computation, the indexing year is two years before the year you first become eligible. For most retirement workers, eligibility begins when they reach age 62, so the relevant indexing year is generally the calendar year two years before that age-62 year. Earnings before the indexing year are multiplied by the applicable factors. Earnings in the indexing year and later are used at face value for this calculation rather than being increased by an indexing factor.
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This is wage indexing, not a simple consumer-price inflation adjustment. The purpose is to compare your past earnings with national wage levels, because payroll taxes and covered wages have changed over time. The factor is tied to your eligibility year; a person reaching eligibility in a different year can have a different set of indexed amounts even with the same nominal work history.
Step 3: The highest 35 years produce AIME
For the usual retired-worker calculation, SSA ranks your indexed annual earnings and uses the highest 35 years. It adds those years, converts the total to a monthly figure by dividing by 420 months (35 years × 12), and rounds the result down to a whole dollar. That monthly figure is your average indexed monthly earnings, or AIME. SSA’s Annual Statistical Supplement, Appendix C describes the worksheet and divisor.
What fewer than 35 earnings years means
If you have fewer than 35 years with covered earnings, SSA still averages over 35 years. The missing years contribute zeroes, which lowers AIME. A person with 25 years of earnings therefore does not have those 25 years averaged over 25; ten zero-earning years remain in the 420-month denominator. Additional covered work can replace a zero year, or replace a lower indexed year, if the new year ranks among the highest 35.
Why the highest years may not be your latest years
Indexing can make an earlier year more valuable than its original paycheck suggests, while a low-earning or part-time year may remain below other years. SSA selects by indexed value, not simply by the largest nominal wage shown on an old tax form. Once 35 years are filled, another year helps only if its indexed earnings exceed one of the 35 years already selected.
Step 4: SSA applies the progressive PIA formula
AIME is not your monthly check. SSA applies three percentages to successive portions of AIME. The percentages are 90%, 32%, and 15%. The first percentage applies to the lowest slice of AIME, the second to the slice between the first and second bend points, and the third to the amount above the second bend point. Because the rates decline as AIME rises, the formula is progressive: it does not pay 90% of all your earnings or 90% of all AIME.
2026 bend points and rates
For a worker first eligible in 2026, SSA lists these thresholds in its Primary Insurance Amount formula:
| AIME portion | Rate | 2026 threshold |
|---|---|---|
| First portion | 90% | First $1,286 of AIME |
| Second portion | 32% | More than $1,286 through $7,749 |
| Third portion | 15% | Above $7,749 |
The $1,286 and $7,749 figures are 2026 bend points, not permanent thresholds for every retiree and not limits on lifetime earnings. Someone who first becomes eligible in another year generally uses that year’s bend points and formula parameters. SSA’s 2026 retirement-benefit examples show how eligibility year and indexed earnings interact.
Illustrative formula arithmetic
Suppose, purely as an illustration, that a worker’s AIME is $5,000 and the worker is subject to the 2026 bend points. The PIA formula would be:
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- 90% of the first $1,286 = $1,157.40.
- 32% of the remaining $3,714 (the amount from $1,286 to $5,000) = $1,188.48.
- There is no third-tier amount because AIME is below $7,749.
The unrounded total in this illustration is $2,345.88. SSA’s formula-stage rule rounds the result down to the next lower dime, producing $2,345.80 at that stage. This is not a forecast for any individual; a different earnings record, eligibility year, claiming age, or later adjustment changes the outcome.
Step 5: PIA becomes a benefit only after claiming-age adjustments
SSA defines the PIA as “the benefit (before rounding down to next lower whole dollar) a person would receive if he/she elects to begin receiving retirement benefits at his/her normal retirement age.” In practical terms, PIA is the base amount associated with full retirement age; it is not automatically the check you receive when you file.
Claiming before full retirement age
Starting retirement benefits before your full retirement age reduces the monthly amount. The reduction is tied to how many months early you claim and to the applicable full-retirement-age rules. The PIA calculation from your earnings does not change merely because you decide to claim early; the age adjustment is applied afterward.
Claiming at full retirement age
Claiming at full retirement age generally produces the benefit amount based on your PIA, subject to the rounding and adjustment rules that apply to your record. Full retirement age itself depends on birth year, so do not substitute another person’s age threshold when comparing estimates.
Delaying beyond full retirement age
Waiting after full retirement age can increase the monthly retirement benefit through delayed-claiming adjustments, subject to the rules for your birth year and the age at which you start. The increase is separate from the wage-indexing and PIA steps. SSA’s explanation of the relationship among PIA, claiming age, and COLAs appears in Application of COLA to a Retirement Benefit.
COLAs and rounding after the initial calculation
After the initial PIA and claiming-age adjustment, annual COLAs can raise the benefit. COLAs are applied under SSA’s rules to the applicable benefit amount; they are not a re-indexing of your lifetime earnings and do not change which 35 years were selected. Rounding at the formula and payment stages can also make the displayed or payable amount differ slightly from a calculation that retains every decimal place.
How to compare estimates without mixing unlike numbers
Two estimates can differ even when they appear to use the same salary history. Check these comparison points:
- Earnings record: Are the same years and covered earnings included?
- Number of years: Does one estimate include fewer than 35 years, leaving zero years in the average?
- Indexing year: Are past wages indexed for the same first-eligibility year?
- Bend points: Is the estimate using the correct year’s PIA thresholds rather than the 2026 values by default?
- Claiming age: Are both figures for the same age relative to full retirement age?
- Future assumptions: Does one estimate assume continued earnings, future COLAs, or a different retirement date?
- Offsets and special rules: Does either estimate account for an individual adjustment that is not part of the basic retired-worker formula?
An estimate that includes projected future earnings is not the same as an award calculation based only on earnings already posted. Read the assumptions in SSA’s current estimator and compare the result with your official earnings record before making a filing decision.
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Calling AIME the benefit
AIME is a monthly average of indexed earnings after the 35-year selection and 420-month division. It is the input to the PIA formula, not the amount deposited each month.
Using every year equally
The usual retired-worker method does not average every year of work equally. It selects the highest 35 indexed years. Years outside that group have no effect unless a new year displaces one of the selected years.
Treating bend points as earnings caps
Bend points divide AIME into formula portions. They do not cap your lifetime wages or stop additional earnings from being recorded. Earnings above the second bend point are still represented in AIME, but that portion receives the 15% factor under the 2026 formula.
Applying 2026 numbers to everyone
The 2026 bend points apply to workers first eligible in 2026. A person who reached age 62 earlier generally has a different eligibility-year formula. Always match the bend points to the applicable year.
Assuming early filing changes the earnings calculation
Early filing changes the benefit through a claiming-age reduction; it does not turn the highest-35-year method into a different lifetime average. Keep the earnings calculation and the age adjustment as separate steps when evaluating a filing date.
A practical checklist before you rely on an estimate
- Open your SSA earnings record and verify every listed year and amount.
- Identify how many years contain covered earnings and whether zero years remain in the 35-year period.
- Determine the first-eligibility year that controls your indexing factors and bend points.
- Review how earlier wages are wage-indexed and remember that earnings in and after the indexing year are used at face value for this calculation.
- Confirm that the estimate divides the selected earnings by 420 months and rounds as SSA specifies.
- Separate the AIME, PIA, and final payable-benefit figures; they are different stages.
- Compare claiming ages using the same assumptions about future work and COLAs.
- Use SSA’s official estimator for a personalized figure rather than treating an illustrative formula calculation as a prediction.
Bottom line
Your Social Security retirement benefit grows out of a documented sequence: covered earnings, wage indexing, the highest 35 years, AIME, the year-specific progressive PIA formula, and a final adjustment for when you claim. Checking the earnings record and matching the indexing year, bend points, and claiming age to your circumstances are the essential steps to understanding any estimate.
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