Social Security Explained: How Benefits, Credits, and Claiming Work

By Linda Marsh | Reviewed byDaniel Brookfield, CFP®

Published March 7, 2026 · Last reviewed March 7, 2026

Key takeaways

Social Security is the federal benefit based on your 35 highest-earning years; you need 40 credits, about 10 years of work, to qualify at all.
Full retirement age is 67 for anyone born in 1960 or later; you can claim as early as 62 (reduced) or as late as 70 (increased).
Waiting past full retirement age grows your benefit by about 8% a year up to 70, while claiming early permanently shrinks it.
In 2026 the average retired-worker benefit is about $2,071 a month and the maximum at full retirement age is about $4,152 a month.
Benefits rose 2.8% in the 2026 cost-of-living adjustment; check your earnings record and estimate for free at SSA.gov.

Social Security is the federal benefit that pays you a monthly income in retirement, based on your lifetime earnings record. It is the foundation of most American retirements and one of the three pillars of retirement income. The amount you get depends on how much you earned over your career, how long you worked, and the age at which you choose to claim.

For years I thought of Social Security as a vague promise I could not picture. Once I understood the few rules that drive it, the 35-year average, the 40 credits, and the claiming choice, it stopped feeling like a mystery. Here is how it actually works.

Your benefit is based on your 35 highest-earning years, adjusted for wage growth across your career. The Social Security Administration takes those 35 years, averages them, and runs the result through a formula to produce your monthly amount.

The important detail is the number 35. If you worked fewer than 35 years, the missing years count as zeros and pull your average down. That is why working an extra year or two late in your career can raise your benefit: a higher-earning year can replace a low or zero year in the calculation. The formula is also progressive, meaning it replaces a larger share of income for lower earners than for higher ones.

How many credits you need to qualify

You need 40 credits, which is about 10 years of work, to qualify for Social Security retirement benefits. You earn up to four credits a year based on your earnings, and most people who work full time reach the four-credit maximum without trouble.

Once you have your 40 credits you are eligible for life; you do not earn extra credits beyond that. But continuing to work still matters, because additional higher-earning years can improve your 35-year average and lift the benefit. If you are short of 40 credits, a few more years of work can be the difference between qualifying and not.

Full retirement age and when you can claim

Full retirement age is 67 for anyone born in 1960 or later, and you can claim anywhere from 62 to 70. Full retirement age is when you receive 100% of your calculated benefit. The claiming window gives you a wide, and permanent, choice:

Claim at 62: the earliest you can start, but your monthly check is permanently reduced.
Claim at full retirement age (67): you get your full benefit.
Wait until 70: your benefit grows by about 8% a year for each year you delay past full retirement age, thanks to delayed retirement credits. After 70, it stops growing, so there is no reason to wait longer.

This is one of the biggest financial decisions in retirement, and it interacts with your health, your savings, and whether you are still working. We weigh it carefully in when to claim Social Security, and put it alongside other ages in when can I retire.

In 2026 the average retired-worker benefit is about $2,071 a month, and the maximum at full retirement age is about $4,152 a month. Most people land well below the maximum, because it requires having earned at or above the taxable maximum for many years.

Benefits also keep pace with prices through an annual cost-of-living adjustment (COLA), which was 2.8% for 2026. That inflation protection is one of Social Security’s most valuable features and is hard to replicate with private savings, as we discuss in inflation and retirement. One caution: depending on your total income, up to 85% of your benefit can be taxable, which we cover in taxes in retirement.

Working while claiming, and spousal benefits

If you claim before full retirement age and keep working, an earnings test can temporarily reduce your benefit. In 2026, $1 is withheld for every $2 you earn above $24,480 before full retirement age. The withheld money is not lost; your benefit is recalculated upward once you reach full retirement age. After full retirement age there is no earnings test at all. We cover this in working in retirement.

Social Security also pays spousal and survivor benefits, so a lower-earning or non-working spouse, a widow or widower, and even some divorced spouses may be entitled to a benefit based on someone else’s record. These rules are worth understanding before you claim, and we explain them in Social Security spousal and survivor benefits.

The single most useful step is to create a free my Social Security account at SSA.gov and read your statement. It shows your year-by-year earnings record and a personalized estimate of your benefit at ages 62, 67, and 70.

This matters because the whole calculation depends on your earnings being reported correctly, and errors do happen. I found checking mine genuinely reassuring; it turned a vague promise into a real number I could plan around. We walk through reading it in your Social Security statement.

This is general information, not personalized advice. The official, free resource is SSA.gov, and for how Social Security fits with your savings and a fiduciary advisor’s help, see the retirement planning pillar.

References

Retirement benefits, Social Security Administration.
my Social Security account, Social Security Administration.
Social Security Administration, SSA.
Saving and investing for retirement, Investor.gov (SEC).

Frequently asked questions

How is my Social Security benefit calculated?

Social Security averages your 35 highest-earning years, adjusted for wage growth, to produce a figure your monthly benefit is based on. If you worked fewer than 35 years, the missing years count as zeros and drag the average down. That is why an extra year or two of higher earnings late in your career can nudge the benefit up: it can replace a low or zero year in the calculation. You can see your own earnings record and a personalized estimate at SSA.gov.

How many years do I need to work to get Social Security?

You need 40 credits to qualify for retirement benefits, which is about 10 years of work. You earn up to four credits a year based on your earnings, so most people who work full time hit the four-credit maximum easily. Once you have 40 credits you are eligible; you do not earn extra credits beyond that, but continuing to work can still raise your benefit by improving your 35-year earnings average.

What is full retirement age for Social Security?

Full retirement age is 67 for anyone born in 1960 or later. That is the age at which you receive 100% of your calculated benefit. You can claim as early as 62, but your monthly amount is permanently reduced. You can also wait past 67, and your benefit grows by about 8% a year until it stops increasing at age 70. Full retirement age is not the same as 65, which is when Medicare begins.

How much is the average Social Security check?

In 2026 the average benefit for retired workers is about $2,071 a month. The maximum benefit for someone claiming at full retirement age is about $4,152 a month, but very few people reach it because it requires having earned at or above the taxable maximum for many years. Your own figure depends on your lifetime earnings and the age you claim. Benefits also rose 2.8% in the 2026 cost-of-living adjustment.

How do I check my Social Security statement?

Create a free my Social Security account at SSA.gov. Your statement shows your year-by-year earnings record and a personalized estimate of your benefit at different claiming ages. It is worth checking, because the calculation relies on your earnings being reported correctly, and mistakes do happen. Reviewing it is the single most useful first step in planning, and we walk through it in detail in our guide to your Social Security statement.

Written by Linda Marsh. Reviewed byDaniel Brookfield, CFP®.

Our guides are written from personal experience and reviewed by a qualified financial professional for accuracy. Read our editorial policy.