The Key Number That Determines Your Social Security Check

How much you’ll receive in retirement largely depends on one crucial number. If you’re counting on Social Security to help cover living expenses, understanding this figure can dramatically change your planning and expectations.

Millions of retirees rely on Social Security as a major source of income, while others use it as a supplemental boost to savings. Either way, knowing how benefits are calculated is essential to maximize your monthly payment.

Adults reviewing financial paperwork

The most important factor: Average Indexed Monthly Earnings (AIME)

Your Average Indexed Monthly Earnings, or AIME, is the single most important number in determining your Social Security benefit.

Here’s how the Social Security Administration calculates your AIME:

Index your earnings for wage growth – Your wages over your career are adjusted to reflect overall wage growth in the economy, giving a more accurate picture of lifetime income.
Average your 35 highest-earning years – Social Security adds up your indexed earnings for the 35 years when you earned the most. If you worked fewer than 35 years, the missing years count as $0. The total is divided by the number of months in those years.
Apply the wage base limit – Only income up to the Social Security wage base limit counts toward your benefit. For 2026, that limit is $184,500. Earnings above that threshold do not increase your benefits.

This calculation produces your AIME, which serves as the foundation for your retirement benefit.

Quick Read

Social Security’s Biggest 2026 Rule Change Just Handed 3 Million Retirees Thousands in Back Pay

* About 3 million public-sector workers, including teachers, firefighters, and police officers, are now receiving higher Social Security benefits following the repeal of two long-standing provisions, the Windfall Elimination Provision (WEP) and Government Pension Offset (GPO). Eligible retirees are receiving both retroactive payments dating back to January 2024 and permanent increases in their monthly checks.

*Social Security’s combined OASI trust fund is now projected to face a potential shortfall by 2034, which could trigger automatic benefit reductions of around 19% if no congressional action is taken. This moves the timeline for addressing funding challenges closer, giving lawmakers roughly eight years to make adjustments instead of three decades.

*For those planning retirement, it’s important to consider overall income, not just investments. Resources like The Definitive Guide to Retirement Income can help retirees understand Social Security, pensions, and other income sources, providing guidance for long-term financial planning.Read more here:

How AIME translates into your Social Security check

Once your AIME is calculated, Social Security applies bend points to determine the percentage of your income used to compute benefits. Bend points are based on the year you turn 62 (or earlier if you become disabled).

For example, someone turning 62 in 2026 would see the following structure:

AIME	Percentage of AIME Paid
$0 – $1,286	90%
$1,287 – $7,749	32%
$7,750+	15%

If your AIME is $5,000, your monthly benefit at full retirement age would be calculated as:

90% of the first $1,286, plus
32% of the amount between $1,286 and $5,000.

Claiming before or after full retirement age can decrease or increase this amount, but your AIME remains the central driver of your monthly payment.

Why high earners see bigger checks

The higher your lifetime earnings—up to the wage base limit—the higher your AIME and, therefore, your Social Security benefit. People who consistently earn near the wage base throughout their careers maximize their potential monthly income.

The $23,760 Social Security bonus most retirees miss

Many Americans are behind on retirement savings, but there are strategies to unlock extra Social Security income. Some little-known methods, often called “Social Security secrets,” can increase your benefits by thousands of dollars per year. One simple approach could add as much as $23,760 annually to your retirement income, giving you a much more secure and comfortable retirement.

Understanding your AIME and maximizing your Social Security strategy now could be the difference between struggling and retiring confidently.