How Is My Social Security Benefit Calculated?

Published: September 1, 2026
Last Reviewed: September 1, 2026
Author: Christian West, CFP®, RSSA®

Quick Answer

Your Social Security retirement benefit is primarily based on your highest 35 years of Social Security-covered earnings, adjusted for changes in average wages over time.

The Social Security Administration converts those earnings into your Average Indexed Monthly Earnings (AIME), applies a progressive benefit formula to determine your Primary Insurance Amount (PIA), and then adjusts that amount based on when you claim benefits.

In simple terms:

Earnings history → highest 35 years → AIME → PIA → claiming-age adjustment → monthly Social Security benefit.

Key Takeaways

• Social Security generally uses your highest 35 years of earnings.
• If you have fewer than 35 years of earnings, zero-earning years may be included in your calculation.
• Earlier earnings are generally adjusted using Social Security's wage-indexing process.
• Your highest 35 years are converted into your Average Indexed Monthly Earnings, or AIME.
• Social Security applies a progressive formula to your AIME to calculate your Primary Insurance Amount, or PIA.
• Your PIA generally represents your retirement benefit at full retirement age.
• Claiming before full retirement age permanently reduces your monthly retirement benefit.
• Delaying beyond full retirement age can increase your benefit until age 70.
• Continuing to work may increase your benefit if new earnings replace a lower year in your 35-year history.

Step 1: Social Security Looks at Your Earnings History

Your Social Security retirement benefit is not simply based on your salary during your final few years of work. Instead, Social Security generally considers your lifetime covered earnings and ultimately uses your 35 highest years of indexed earnings. Only earnings covered by Social Security count toward this calculation.

For 2026, the maximum amount of earnings subject to Social Security tax is $184,500. Earnings above that amount do not create additional Social Security-covered earnings for that year. This annual limit generally changes over time based on wage growth.

What If I Have Fewer Than 35 Years of Earnings?

This is one of the most important Social Security calculation rules to understand. Social Security generally uses a 35-year calculation even when someone has worked fewer than 35 years.

For example, if someone has only 30 years of covered earnings, the calculation may effectively include:

• 30 years of earnings
• 5 years of zeros

Those zero years can reduce the worker's average earnings and ultimately reduce the monthly retirement benefit. This is also why working an additional year can sometimes increase someone's future Social Security benefit.

A new year of earnings might replace:

• A zero year
• A low-income year
• An early-career year with relatively low indexed earnings

Even someone who already has 35 years of earnings may increase their benefit if a new year is higher than one of the existing years used in the calculation.

Step 2: Social Security Adjusts Earlier Earnings for Wage Growth

A salary earned decades ago cannot be fairly compared dollar-for-dollar with a salary earned today. To address this, Social Security generally adjusts earlier earnings using the national Average Wage Index. This process is known as wage indexing. In general, earnings through the year a worker turns 59 are indexed. Earnings beginning in the year the worker reaches age 60 are generally included at their actual nominal value.

Why does wage indexing matter?

Imagine someone earned $30,000 many years ago. That $30,000 may have represented relatively strong earnings at the time, even though it appears low compared with salaries today. Social Security's indexing process accounts for how average wages have changed during the worker's career. This means the benefit calculation is more sophisticated than simply adding together the dollar amounts shown on old W-2s.

Step 3: Social Security Selects Your Highest 35 Years

After applicable earnings are indexed, Social Security identifies the worker's 35 highest years of indexed earnings. Those earnings are added together and converted into a monthly average.

There are 420 months in 35 years:

35 years × 12 months = 420 months

The result is known as your:

Average Indexed Monthly Earnings, or AIME

For example, suppose a worker's highest 35 years of indexed earnings total:

$2,100,000

Divide that amount by 420:

$2,100,000 ÷ 420 = $5,000

The worker's simplified AIME would therefore be approximately:

$5,000 per month

*The actual Social Security calculation includes specific rounding rules, so this example is for educational purposes only.

Step 4: Social Security Applies Its Benefit Formula

Social Security does not simply pay retirees a fixed percentage of their AIME.

Instead, it applies a progressive benefit formula.

The formula uses dollar thresholds known as bend points.

For a worker who first becomes eligible for retirement benefits at age 62 in 2026, the bend points are:

• $1,286
• $7,749

The 2026 formula generally applies:

• 90% to the first $1,286 of AIME
• 32% to AIME between $1,286 and $7,749
• 15% to AIME above $7,749

These percentages are established by law. The dollar bend points change over time based on changes in average wages. Importantly, the applicable bend points are generally based on the year a worker first becomes eligible for retirement benefits usually the year they reach age 62.

A Hypothetical Social Security Benefit Calculation

Consider an individual, who turns 62 in 2026.

After Social Security indexes her earnings and selects her highest 35 years, assume her AIME is:

$5,000

Because her entire AIME falls below the second bend point, the simplified calculation would look like this.

First portion

90% of the first $1,286:

$1,286 × 90% = $1,157.40

Second portion

She has:

$5,000 − $1,286 = $3,714

remaining.

Apply the 32% factor:

$3,714 × 32% = $1,188.48

Add the two amounts

$1,157.40 + $1,188.48 = $2,345.88

After applying Social Security's applicable rounding rules, her hypothetical PIA would be approximately:

$2,345.80 per month

That becomes the starting point for determining her retirement benefit.

Why Doesn't Social Security Replace the Same Percentage of Everyone's Income?

Notice how the formula works. The first portion of AIME receives a 90% factor. The next portion receives 32%. The highest portion receives only 15%.

This makes Social Security's benefit formula progressive. Lower-wage workers generally receive a higher percentage of their pre-retirement earnings through Social Security than higher-wage workers. Higher earners may still receive larger Social Security benefits in dollar terms, but Social Security generally replaces a smaller percentage of their previous income.

That distinction can be important when determining how much retirement spending will need to come from other sources such as:

• 401(k)s
• IRAs
• Brokerage accounts
• Pensions
• Real estate income
• Other retirement assets

Step 5: Social Security Determines Your Primary Insurance Amount

The result of the AIME formula is your Primary Insurance Amount, or PIA. The PIA is one of the most important numbers in Social Security planning. It generally represents the retirement benefit payable if you begin benefits at your full retirement age, before considering certain other adjustments. For people born in 1960 or later, full retirement age is 67.

Using a simplified example:

PIA: approximately $2,345.80 per month

If they begin retirement benefits at thier full retirement age, the starting benefit would generally be based on that amount, subject to applicable cost-of-living adjustments and other Social Security rules.

Step 6: Your Claiming Age Changes the Benefit You Actually Receive

Calculating your PIA is not the end of the process. Your monthly Social Security retirement benefit also depends heavily on when you claim.

For someone born in 1960 or later:

• Full retirement age is 67
• Claiming at 62 can reduce the retirement benefit to approximately 70% of the full retirement benefit
• Waiting until 70 can increase the retirement benefit to approximately 124% of the full retirement benefit

Using a hypothetical PIA of $2,345.80:

These are simplified illustrations and do not account for every Social Security rounding convention, cost-of-living adjustment, claiming-month rule, or individual circumstance. This illustrates why two people with identical earnings histories could ultimately receive different monthly Social Security checks if they claim at different ages.

What Are Social Security Bend Points?

The term bend point can sound technical, but the concept is fairly straightforward. Think of the Social Security benefit formula as having three buckets.

For someone first becoming eligible in 2026:

Bucket 1: First $1,286 of AIME
Benefit factor: 90%

Bucket 2: AIME from $1,286 through $7,749
Benefit factor: 32%

Bucket 3: AIME above $7,749
Benefit factor: 15%

The formula “bends” each time the percentage changes. These bend points are one reason Social Security generally replaces a greater percentage of income for lower earners than for higher earners.

Does Working Longer Increase My Social Security Benefit?

It can. Suppose someone already has 35 years of covered earnings but continues working. If the new year of earnings is higher than one of the years currently being used in the 35-year calculation, the newer year may replace the lower one.

That could increase:

Indexed earnings → AIME → PIA → future Social Security benefit

For example, imagine a worker's current calculation contains one year with only $15,000 of indexed earnings.

The worker then has a later year with $100,000 of covered earnings. If that new year replaces the $15,000 year, the worker's 35-year average may increase. The effect on the actual monthly benefit will depend on the worker's earnings history and where their AIME falls within the Social Security benefit formula.

Does Working After Age 62 Still Count?

Yes, potentially. Reaching age 62 does not permanently freeze your earnings history. Later covered earnings can still affect your Social Security retirement benefit if they are high enough to replace a lower year in the 35-year calculation.

This can be particularly relevant for someone who:

• Started their career later
• Spent several years outside the workforce
• Had several low-income years
• Earns significantly more late in their career
• Continues working into their late 60s or beyond

Is My Social Security Statement an Exact Prediction?

No. Your Social Security Statement provides an estimate based on your earnings record and assumptions about future earnings. The Social Security Administration cannot know exactly what you will earn in future years.

Your eventual benefit may change because of:

• Additional earnings
• Changes in future earnings
• Your claiming age
• Cost-of-living adjustments
• Corrections to your earnings history
• Future changes in Social Security law

Your Social Security Statement is an important planning tool, but it should not be viewed as an absolute guarantee of a future payment amount.

Why You Should Review Your Social Security Earnings Record

One of the simplest Social Security planning steps is also one of the most important:

Review your earnings history.

Your online Social Security account allows you to see the earnings Social Security has recorded for you by year.

Look for:

• Missing years
• Unexpected zeros
• Earnings that appear too low
• Other discrepancies

Because your benefit calculation starts with your earnings history, incorrect information could potentially affect your future benefit. Finding an error earlier may also make it easier to locate supporting documents such as W-2s, tax returns, or pay records.

Does Earning More Always Increase Social Security by the Same Amount?

No. Remember the progressive benefit formula.

Depending on where someone's AIME falls, additional AIME may enter a portion of the formula multiplied by:

• 90%
• 32%
• 15%

That means an additional dollar of lifetime average earnings does not necessarily create the same increase in Social Security benefits for every worker. This is important when deciding whether working an additional year is likely to make a meaningful difference in a retirement plan.

What Is the Maximum Social Security Benefit in 2026?

In 2026, the maximum monthly Social Security retirement benefit for a worker retiring at full retirement age is $4,152 per month. However, simply earning $184,500 in 2026 does not qualify someone for the maximum benefit. Receiving a maximum or near-maximum benefit generally requires a long history of earnings at or near Social Security's annual taxable maximum. For 2026, the maximum amount of earnings subject to Social Security tax is $184,500. The maximum-benefit calculation is a separate topic that we will address later in this Social Security series.

Financial Planning Implications

Understanding how Social Security calculates your benefit can help with several broader retirement decisions.

1. Determine Whether Additional Work Years Could Help

Someone with fewer than 35 years of earnings may receive a meaningful benefit from replacing a zero year. Someone with 35 years of consistently strong earnings may see a smaller effect.

2. Identify Low Earnings Years

Even with more than 35 years of work history, unusually low earnings years may still be included in your calculation. Additional higher-earning years could potentially replace them.

3. Separate Retirement From Social Security

Stopping work and claiming Social Security do not have to happen at the same time.

For example, someone could:

• Retire at 64
• Use investments or other income for several years
• Delay Social Security until 67 or 70

Whether that makes sense depends on the broader financial plan.

4. Coordinate Benefits Between Spouses

Each spouse's retirement benefit begins with their individual earnings history. However, spousal and survivor-benefit rules can make the household planning decision more complex.

The question is often not simply:

“How much will each spouse receive?”

It is also:

“How should we coordinate both benefits over two lifetimes?”

5. Incorporate Social Security Into the Retirement Income Plan

Knowing your estimated Social Security income can help determine how much retirement spending will need to come from investments and other income sources. If a household wants $10,000 per month of retirement income and expects $5,000 from Social Security, the remaining income will need to come from other sources. Those sources may include investments, pensions, real estate, cash reserves, or other income.

6. Coordinate With Tax Planning

The timing of Social Security can interact with:

• Roth conversions
• Traditional IRA withdrawals
• 401(k) withdrawals
• Required minimum distributions
• Capital gains
• Pension income
• Charitable giving
• Medicare premiums

Social Security should therefore be considered as part of the broader retirement plan rather than as an isolated decision.

Common Misunderstandings About Social Security Benefits

“Social Security is based on my last five years of salary.”

Generally false. Social Security typically uses your highest 35 years of indexed earnings.

“If I already worked 35 years, working longer cannot increase my benefit.”

Not necessarily. A new high-earning year may replace a lower year currently included in the calculation.

“If I earn twice as much, I will receive twice as much Social Security.”

Generally not. Social Security's progressive PIA formula means benefits do not increase dollar-for-dollar with earnings.

“My Social Security Statement tells me exactly what I will receive.”

No. It provides an estimate based on your current earnings record and assumptions.

“My PIA is automatically the amount I will receive.”

Not necessarily. Your PIA generally represents your benefit at full retirement age. Claiming earlier may reduce the benefit, while delaying beyond FRA may increase it until age 70.

Frequently Asked Questions

Does Social Security Use My Highest 35 Years or My Last 35 Years?

Social Security generally uses your highest 35 years of indexed earnings, not simply your last 35 years.

What Happens If I Only Worked 25 Years?

If you have fewer than 35 years of earnings, zero-earning years may be included in your 35-year calculation. Those zeros can lower your Average Indexed Monthly Earnings and therefore your eventual benefit.

Can Working After Age 67 Increase My Social Security?

Potentially. If later covered earnings are high enough to replace a lower year currently included in your 35-year calculation, your Social Security benefit may increase.

Does Social Security Count Investment Income?

Investment income generally does not count toward the earnings history used to calculate your Social Security retirement benefit. The retirement-benefit calculation is generally based on covered wages and applicable self-employment earnings.

Does Earning More Than $184,500 in 2026 Increase My Social Security Benefit Further?

For 2026, only earnings up to the $184,500 Social Security taxable maximum are generally credited as Social Security-covered earnings for the year. Earnings above that amount do not increase the covered-earnings amount used for Social Security purposes for that year.

Bottom Line

Social Security may look like a simple monthly retirement check, but several calculations happen behind the scenes.

The basic process is:

1. Review your lifetime covered earnings.

2. Adjust applicable earlier earnings through wage indexing.

3. Select your highest 35 years.

4. Calculate your Average Indexed Monthly Earnings, or AIME.

5. Apply Social Security's progressive formula to determine your Primary Insurance Amount, or PIA.

6. Adjust the benefit based on when you claim.

Understanding this calculation helps explain why working another year may matter, why two people with similar current salaries can have different benefits, and why Social Security should be considered within the context of an overall retirement plan.

Your Social Security estimate is an important number.

But the bigger question is how that income fits alongside your investments, taxes, pensions, Medicare, spouse's benefits, longevity, and retirement spending needs.

About Rigden Capital Strategies

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Sources

Social Security Administration — Social Security Benefit Amounts and PIA Formula
https://www.ssa.gov/oact/cola/Benefits.html

Social Security Administration — Primary Insurance Amount
https://www.ssa.gov/oact/ProgData/retirebenefit2.html

Social Security Administration — Contribution and Benefit Base
https://www.ssa.gov/oact/COLA/cbb.html

Social Security Administration — Maximum Taxable Earnings FAQ
https://www.ssa.gov/faqs/en/questions/KA-02387.html

Social Security Administration — 2026 Cost-of-Living Adjustment Fact Sheet
https://www.ssa.gov/cola/factsheets/2026.html

Social Security Administration — Delayed Retirement for People Born in 1960 or Later
https://www.ssa.gov/benefits/retirement/planner/1960-delay.html

Social Security Administration — Annual Statistical Supplement: Computing a Retired-Worker Benefit
https://www.ssa.gov/policy/docs/statcomps/supplement/2025/apnc.html

Important Disclosure

This material is provided for general educational and informational purposes only and should not be construed as individualized investment, tax, legal, or Social Security advice or as a recommendation to take any particular action.

Examples are hypothetical and simplified for illustrative purposes. They do not represent the circumstances of any specific individual. Actual Social Security calculations include detailed earnings histories, wage indexing, rounding conventions, claiming dates, cost-of-living adjustments, and other factors that may result in different benefit amounts.

Social Security laws, formulas, benefit amounts, taxable-earnings limits, tax rules, Medicare rules, and related regulations may change. Information is believed to be accurate as of the date shown but should be verified with the Social Security Administration and appropriate tax, legal, and financial professionals before making decisions.

Rigden Capital Strategies is an SEC-registered investment adviser. Registration does not imply a certain level of skill or training. Advisory services are provided only pursuant to an appropriate advisory agreement. Past performance is not indicative of future results, and no financial-planning strategy can guarantee a particular outcome.