How To Calculate AIME | Get Your Number Right

AIME is your wage history, wage-indexed through age 60, averaged over up to 35 top years, then turned into a monthly figure rounded down to a whole dollar.

AIME sounds like alphabet soup until you see what it does. It’s the number Social Security uses to build your retirement (and many disability and survivor) benefit math. If you can calculate AIME cleanly, you can sanity-check an estimate, spot missing earnings, and see how a higher-earning year changes your long-run monthly check.

This walkthrough sticks to the same concepts Social Security uses: wage indexing, selecting up to 35 highest years, dividing by 420 months, then rounding down. You’ll get a repeatable method, plus a worked sample, without needing a paid tool.

What AIME Means And Where It Shows Up

AIME stands for “Average Indexed Monthly Earnings.” “Indexed” means your past earnings get adjusted using the national wage index so a dollar earned decades ago is expressed in wage-level terms closer to your age-60 year. That adjustment is meant to put earlier earnings on a comparable scale with later earnings.

Once Social Security has your AIME, it runs that number through a separate formula to produce your Primary Insurance Amount (PIA), which is the base benefit at full retirement age. Bend points set the breakpoints in that PIA formula, and they change by year. The bend point page is the cleanest place to see them. SSA benefit formula bend points lists the current thresholds and percentages.

You do not need to compute PIA to compute AIME. Still, knowing that AIME feeds PIA keeps the goal clear: get the AIME number right first, then move on to benefit math if you want a full estimate.

What You Need Before You Start

You need one thing above all: your annual covered earnings history. The cleanest source is your Social Security earnings record. Use the numbers that show up as Social Security–covered wages or self-employment income, not what’s on your resume or what you remember from old W-2s.

You’ll also need your birth year, since the wage indexing step ties to the year you turn 60. Social Security’s indexing factor table is published openly. SSA indexing factors for earnings shows the multipliers used to convert each past year’s earnings into indexed earnings for your “eligibility year” set.

One more source can help if you want to double-check the wage index itself rather than relying on the pre-built factor table. SSA national average wage index series lists the wage index values used across the program.

Taking AIME From Raw Earnings To A Monthly Average

Step 1: Set Your Indexing Year

Your indexing year is the year you turn 60. Earnings up through the year you turn 60 are wage-indexed. Earnings after that point are taken at face value for this step, meaning they are not wage-indexed the same way. The SSA factor table reflects that approach in the way it lists factors tied to your eligibility year set. Indexing factor rules and tables spell out the mechanics Social Security uses.

Step 2: Build A Year-By-Year Earnings List

Make a simple list by calendar year. Put one number next to each year: your covered earnings for that year.

• If you worked for wages, use the covered wage figure from your SSA record.
• If you had self-employment income, use the covered self-employment amount from your SSA record.
• If a year is missing because you did not work or had no covered earnings, that year is a zero for the averaging step.

If you spot a year that looks wrong, fix the record first. AIME math is only as clean as the earnings list that feeds it.

Step 3: Wage-Index Earnings Through Age 60

For each year up to and including the year you turn 60, multiply that year’s earnings by the indexing factor tied to your eligibility year set. The factor table is already prepared so you do not have to compute ratios yourself. SSA indexing factor table provides those multipliers.

For years after you turn 60, keep the earnings number as-is for this step. That means your late-career years can still land in your top 35, yet they do not get the same wage-indexing multiplier.

Step 4: Select Up To 35 Highest Indexed Years

Once every year has an indexed earnings value (or a plain value for years after age 60), sort the years from highest to lowest. Take the top 35 years.

If you have fewer than 35 years with covered earnings, you still fill the 35-year set. The missing years are zeros. That can pull the average down, which is why early-career gaps show up later in the math.

Step 5: Add Them Up

Add the indexed earnings from the selected years. Keep the total as a yearly total for now. You are still in “annual earnings” territory at this point.

Step 6: Convert To A Monthly Average And Round Down

There are 35 years in the set, and 12 months in each year. Multiply 35 × 12 to get 420 months. Divide your summed indexed earnings by 420.

The result is your Average Indexed Monthly Earnings. Social Security uses rounding rules that bring AIME down to a whole dollar amount, not cents. For internal policy detail, the computation methods and rounding conventions are covered in SSA’s policy manual. SSA POMS benefit computation sections is where SSA documents the computation rules used by staff.

Common Snags That Change The Number

Years With No Covered Earnings

A year with no covered earnings is a zero in the 35-year set if you do not have 35 positive years to replace it. That’s why a person with 30 strong years and 5 zeros can end up with a lower AIME than someone with 35 steady years.

Earnings That Exceed Taxable Limits

Your earnings record typically reflects covered earnings for Social Security, which ties to the taxable wage base for each year. If you are pulling numbers from another source, check that you are not counting earnings above the covered maximum for a given year.

Self-Employment Timing And Corrections

Self-employment earnings can be corrected later than wage earnings, and late filings or amendments can shift a year’s number. If your record has gaps, the fix comes before the math.

Different Computation Paths For Some Disability Cases

Retirement benefit computations use the standard approach described here. Some disability computations use different dropout rules tied to age and disability onset. If you are working a disability estimate, use SSA policy for the right divisor months rather than copying the retirement divisor without checking.

Calculation Checklist You Can Reuse

The steps are simple, yet it’s easy to lose track when you’re staring at decades of numbers. This checklist keeps it tidy.

Step	What To Do	What You Need
1	Find the year you turn 60	Birth year and calendar year math
2	List covered earnings for each work year	Your SSA earnings record
3	Apply wage indexing through age 60	Indexing factors for your eligibility year set
4	Keep post-60 earnings as plain values	Earnings for years after age 60
5	Sort all years by indexed value	Spreadsheet or hand ranking
6	Select the top 35 years (pad with zeros if short)	Count of years with covered earnings
7	Sum the selected indexed earnings	Calculator or spreadsheet sum
8	Divide by 420 months, then round down to a whole dollar	420 divisor and rounding step

Worked Sample With Simple Numbers

This sample uses a short list to show the flow. In real life, you’ll run the same steps across all work years, then select the top 35.

Sample Earnings List

Start with your yearly covered earnings. Then apply the indexing factor for each year up to and including the year you turn 60. For years after that, keep the raw earnings figure for this step. The factors come straight from the SSA table for your eligibility year set. SSA indexing factors is built for this job.

After indexing, sort and pick the highest years. In a full retirement computation, you’d end up with 35 years in the set. Here, the sample shows the indexing step and the style of math you’ll repeat.

Turning Indexed Years Into AIME

Once you have your top-35 indexed earnings total, the monthly average is straight math:

1. Add the indexed earnings from the chosen years.
2. Divide that total by 420.
3. Round down to the next whole dollar for AIME.

If you are using a spreadsheet, keep one column for raw earnings, one column for the indexing factor, and one column for indexed earnings. That setup makes it easy to sort and take the top 35.

How AIME Connects To Your Benefit Amount

AIME is not your monthly benefit. It’s an input. Social Security turns your AIME into a Primary Insurance Amount using a three-part formula with bend points. The bend points change each year, and Social Security publishes them. SSA bend points page shows the current thresholds and the percent factors used in the PIA formula.

If you want a rough sense of direction without running the full PIA math, here’s the practical takeaway: increasing AIME usually increases PIA, yet the percent applied to higher slices of AIME is lower than the percent applied to the first slice. That’s why two people with the same AIME change can see different benefit changes depending on where their AIME sits in the formula slices.

For readers who want the policy-level backing on computations, SSA’s own manual lays out computation methods and related mechanics used in benefit work. SSA POMS computation materials is the public-facing entry point.

Sample Indexing Table And AIME Math

This sample table uses placeholder-style numbers to show how indexed earnings can differ from raw earnings. Your factors will depend on your year-60 indexing year and the SSA factor table for that eligibility year set.

Year	Covered Earnings	Indexed Earnings
1995	$22,000	$55,000
2000	$35,000	$74,000
2005	$46,000	$80,000
2010	$58,000	$83,000
2015	$72,000	$88,000
2020	$88,000	$92,000
2024	$102,000	$102,000

In this small slice, the indexed earnings are higher than the raw earnings for older years because wage indexing scales them to the year-60 wage level. In a full run, you’d index all years through age 60, keep later years as plain values for this step, sort the full list, and pick the top 35.

Ways To Check Your Work Without Guessing

Sanity Check 1: Your Top Years Should Cluster In Mid And Late Career

Most people’s top indexed years are not all late-career years. Wage indexing lifts earlier years too. You’ll often see a mix of mid-career and later years in the top 35 once indexing is applied.

Sanity Check 2: AIME Should Track Your Career Shape

If your earnings rose steadily, your AIME should rise when you replace an older low year with a newer higher year. If your AIME drops after adding a new earnings year, look for a sorting mistake or a wrong year marked as indexed vs. plain.

Sanity Check 3: Indexing Factors Should Match Your Eligibility Year Set

Indexing factors depend on the year you turn 60. If you grabbed factors from the wrong eligibility year set, your indexed earnings column can drift off. Use the factor table tied to your own situation. SSA indexing factor tables are arranged by eligibility year.

Small Tweaks That Can Raise AIME Over Time

AIME is built from your top 35 years. That fact creates a simple rule: if a new year of covered earnings is higher than one of the years currently in your top 35, it can replace that lower year and lift your average.

Some practical angles people use:

• Keep working if your current earnings beat an older low year in the 35-year set.
• Check that all covered earnings are credited, especially after job changes, name changes, or self-employment swings.
• Watch for years with low or zero covered earnings that might still be sitting in the 35-year set.

This is not a promise of a certain benefit level. It’s just the arithmetic of a top-35 average.

Recap You Can Apply In A Spreadsheet

Here’s the full flow in one clean pass:

1. Find the year you turn 60.
2. List covered earnings for each year.
3. Apply SSA indexing factors to each year up through age 60.
4. Keep years after age 60 as plain earnings for this step.
5. Sort by indexed value and pick the top 35 years.
6. Add the selected years, divide by 420, then round down to a whole dollar for AIME.

If you want to carry the calculation into a benefit estimate, use the published bend points tied to your eligibility year and run the PIA formula next. SSA bend points is the official reference for those thresholds.