How is My Social Security Benefit Calculated?
For someone approaching retirement, Social Security can be one of the most important sources of lifetime income. However, the way Social Security determines your monthly benefit is not as simple as looking at your highest salary or taking a percentage of your final years of income. Your benefit is primarily based on your earnings history, the amount of those earnings that were subject to Social Security taxes, your age when you begin receiving benefits, and certain adjustments made by the Social Security Administration. Understanding how those pieces fit together can make it easier to evaluate when to claim Social Security and how it fits into your broader retirement income plan. The figures in this post reflect Social Security rules and limits for 2026. Social Security limits, benefit amounts, and other figures can change from year to year, so this article should be reviewed periodically when using it for future retirement planning.
The foundation of your Social Security retirement benefit is your history of earnings from work. Social Security generally looks at your highest 35 years of earnings. However, it does not simply add those 35 years together. Earlier earnings are adjusted, or indexed, to account for changes in average wages over time. The goal is to put older earnings into terms that are more comparable with earnings closer to retirement. If you worked for fewer than 35 years, the missing years are generally counted as zeroes in the calculation. This is one reason working additional years can sometimes increase a future Social Security benefit, particularly if a new year of earnings replaces a year with little or no earnings. There is also an annual limit on the amount of earnings that can count toward Social Security. In 2026, that limit is $184,500. Earnings above $184,500 are not subject to the Social Security portion of payroll taxes and do not increase your Social Security benefit for that year.
Once Social Security has adjusted your historical earnings and selected your highest 35 years, it calculates something called your Average Indexed Monthly Earnings, or AIME. AIME is essentially a monthly average of your highest 35 years of indexed earnings. It is an important number because Social Security uses it to determine your Primary Insurance Amount, or PIA. The PIA represents the monthly benefit you would generally receive if you began Social Security at your full retirement age, before adjustments for claiming earlier or later. This is where the calculation becomes more complicated because Social Security does not simply replace a fixed percentage of your income.
Social Security uses what are commonly called "bend points" to calculate your PIA. The formula is designed to replace a greater percentage of earnings for lower income workers than for higher income workers. For someone first becoming eligible in 2026, the formula applies three percentages to different portions of AIME:
90 percent of the first $1,286 of AIME, 32 percent of AIME between $1,286 and $7,749, and 15 percent of AIME above $7,749. For example, suppose a hypothetical worker has an AIME of $6,000 and is first eligible for Social Security in 2026. The calculation would apply the 90 percent factor to the first $1,286 and the 32 percent factor to the remaining $4,714. The result becomes the worker's PIA (subject to the Social Security Administration's rounding and adjustment rules). The important point is that earning twice as much does not necessarily produce twice the Social Security benefit. Because the formula applies different percentages to different portions of earnings, Social Security provides a higher replacement rate for people with lower lifetime earnings.
The bend points also change over time. Someone turning 62 in a different year will have different bend points, which is one reason a Social Security calculation for someone retiring several years from now cannot simply use today's figures.
After your PIA has been calculated, your claiming age becomes the next major factor. You can generally begin retirement benefits as early as age 62. However, claiming before your full retirement age permanently reduces your monthly benefit. Waiting beyond full retirement age increases the benefit through delayed retirement credits, with those increases stopping at age 70. For people attaining age 62 in 2026, full retirement age is 67. Someone with a PIA of $3,000 would therefore generally receive $3,000 per month at full retirement age, before considering other adjustments.
If that person instead claims at 62, the benefit could be reduced by as much as 30 percent, resulting in approximately $2,100 per month. The exact reduction depends on the number of months between claiming and full retirement age. On the other hand, delaying benefits beyond full retirement age can produce a substantially larger monthly benefit. For people born in 1943 or later, delayed retirement credits increase the benefit by 8 percent for each full year of delay, up to age 70. That means a person with a $3,000 PIA could receive approximately $3,960 per month by waiting until age 70, before considering future cost of living adjustments. The decision is not simply about maximizing the monthly check. Claiming earlier provides income for more years, while delaying provides a larger monthly benefit for the remainder of your life. The right choice depends on your health, other retirement assets, income needs, taxes, marital situation, and how long you expect Social Security to be an important source of income.
What is the Maximum Social Security Benefit in 2026?
There is not one maximum Social Security benefit that applies to everyone because the amount depends on a person's earnings history and claiming age. For a worker who consistently earned at or above the taxable maximum beginning at age 22, the maximum benefit in 2026 is $2,969 per month when claiming at age 62, $4,152 at full retirement age, and $5,181 at age 70. Those numbers are useful for understanding the upper end of the program, but they are not realistic estimates for most retirees. Your own Social Security statement provides a much better starting point because it is based on your actual earnings record.
Working Longer Can Change Your Benefit
If you are still working as you approach retirement, your future earnings can affect your Social Security benefit. Social Security can replace one of the lower years in your highest 35 years with a higher earning year. This means that someone who continues working into their 60s may increase their eventual benefit, particularly if their earlier career included several years of relatively low income. For 2026, earnings above $184,500 do not increase the Social Security benefit calculation because that is the maximum amount of earnings subject to Social Security tax.
Working while receiving Social Security can also create a separate issue before full retirement age. In 2026, someone below full retirement age can have benefits withheld if earnings exceed $24,480. For someone reaching full retirement age during 2026, the higher earnings limit is $65,160 for the months before reaching full retirement age. After reaching full retirement age, there is no earnings limit. These withheld benefits are not simply lost. Social Security can adjust the benefit after full retirement age to account for months in which benefits were withheld because of excess earnings.
Cost of Living Adjustments Can Increase Your Benefit
Social Security benefits are also adjusted over time through annual cost of living adjustments, commonly called COLAs. The 2026 COLA was 2.8 percent. These increases are applied to Social Security benefits to help account for changes in consumer prices. Because COLAs are applied over time, the monthly benefit you ultimately receive can be higher than the original benefit estimate shown on an earlier statement. Future COLAs cannot be known in advance, so retirement projections should use assumptions rather than treating today's benefit amount as a fixed number.
Your Social Security Statement is the Best Place to Start
If you are within a few years of retirement, one of the most useful steps you can take is to review your earnings record through your personal Social Security account (www.ssa.gov). Your statement provides estimated benefits based on your actual earnings history and allows you to compare claiming at different ages. It can also help identify errors or missing earnings that could affect your eventual benefit.
The estimate is a starting point, not necessarily the answer to when you should claim. For many households approaching retirement, the more important question is how Social Security fits with the rest of the retirement income plan. A household with substantial investment assets may have more flexibility to delay Social Security, while someone who depends heavily on Social Security for monthly expenses may have different considerations. Taxes also matter. Social Security benefits can be taxable depending on your overall income, and the timing of Social Security can interact with IRA withdrawals, Roth conversions, Medicare premiums, and other sources of retirement income. Knowing how your Social Security benefit is calculated gives you a better understanding of where the number comes from, but it does not necessarily tell you when you should claim. For someone approaching retirement, the decision should be considered alongside investment assets, expected spending, other sources of income, taxes, Medicare costs, longevity, and the potential impact of a surviving spouse's income. We urge you to have a conversation with your Wealth Manager if you are curious and want to learn more.
IMPORTANT DISCLOSURES
This post was created with the assistance of AI tools for research and drafting. It was reviewed, edited, and fact-checked by Sean Rosencrance before publication. Please verify any critical information.
These materials are provided for general information and educational purposes based upon publicly available information from sources believed to be reliable—we cannot assure the accuracy or completeness of these materials. The information in these materials does not constitute tax or legal advice and may change at any time and without notice. Please consult with a qualified tax professional, attorney, or Wealth Manager regarding your specific situation.
Spire Wealth Management, LLC is a Federally Registered Investment Advisory Firm. Securities offered through an affiliated company, Spire Securities, LLC., a Registered Broker/Dealer and member FINRA/SIPC.
