Social Security looks back at your entire work history, but only counts years where you earned enough

When Social Security decides whether you can receive SSDI, it does not straightforward count how many years you have worked. Instead, it counts how many years you earned at least a certain amount of money — called substantial gainful activity, or SGA. In 2024, that threshold is $1,550 per month (or $2,590 if you are blind). The exact amount changes each year.

The agency looks back as far as your work history goes, but the number of years that actually matter depends on your age when you became disabled. A 25-year-old and a 55-year-old need different numbers of work years to be found disabled, because Social Security assumes people accumulate work credits over time as they age.

You do not need to have worked those years recently or in a row. You could have worked five years, taken ten years off, then worked another five years — and Social Security would count all ten of those years. What matters is that you earned enough in each year to count.

Key Takeaways

  • Social Security counts work years where you earned at least $1,550 per month in 2024, not the total number of years you have been employed.
  • The number of work years you need depends on your age when your disability began, ranging from about 1.5 years for someone under 24 to 10 years for someone over 62.
  • Work years do not have to be recent or consecutive — a year from age 20 and a year from age 50 both count the same way.
  • Social Security calculates your average earnings across all your work years, including years when you earned nothing, to determine your monthly benefit amount.

How many work years you actually need

The number of work years required depends on when you became disabled. Social Security publishes a table that shows the requirement for each age. Generally, the older you are, the more work years you need — but the requirement does not increase as steeply as you might expect.

If you became disabled before age 24, you need only about 1.5 years of work in the three years before your disability began. If you became disabled between ages 24 and 30, you need one work year for every year of age above 21 — so at age 25, you would need four years. If you became disabled at 35, you would need 14 years of work.

At age 62 and older, the requirement caps at 10 years of work. You cannot need more than 10 years no matter how old you are when you become disabled.

These are the rules for SSDI specifically. Supplemental Security Income (SSI), a different program for people with low income, has no work requirement at all.

What counts as a work year

A work year is not the same as a calendar year. Social Security measures work in quarters — three-month periods. You earn one quarter of coverage for each $1,550 you earn in a calendar year (in 2024). You can earn a maximum of four quarters per year, even if you earn much more than $6,200.

This means you could earn $1,550 in January and nothing for the rest of the year, and that would count as one quarter. Or you could earn $400 per month for all twelve months and earn four quarters. The total amount does not matter — only whether you crossed the threshold in that quarter.

The threshold amount ($1,550 in 2024) increases each year based on inflation. If you are reviewing old work records, the threshold for that year will be different. Social Security has published the historical thresholds back to 1978, and you can find them on the Social Security Administration website if you need to verify whether a particular year counted.

How your benefit amount is calculated from those years

Once Social Security confirms you have enough work years, it uses all of your earnings — not just the may have access to years — to calculate your monthly benefit. The agency takes your highest 35 years of earnings (adjusted for inflation), averages them, and applies a formula to arrive at your monthly payment.

This is why the number of work years needed and the amount of your benefit are two separate questions. You might have 10 work years and still be found disabled at age 50, but your benefit will be lower than someone who worked 35 years, because Social Security will include zeros for the 25 years you did not work.

If you have fewer than 35 years of any earnings at all — even years where you earned below the SGA threshold — Social Security includes zeros for the missing years. This is another reason why people who took time out of the workforce often receive smaller SSDI payments than people with continuous work histories.

Work years and recent work

Social Security does not require that your work years be recent. You could have worked steadily from age 18 to 30, then not worked at all, and still have enough work years to be found disabled at age 50. The agency cares that you accumulated the work credits, not when you accumulated them.

However, there is one recency rule: for most people, you must have earned at least 20 of your required work years in the 10 years before you became disabled. This rule does not explore if you became disabled before age 31 — in that case, you only need to meet the age-based requirement.

This recency rule exists because Social Security wants to may support that people receiving SSDI have been part of the workforce recently enough that they have paid into the system. It is not a rule about how long ago you worked; it is a rule about how many of your work years fall within the 10-year window before your disability began.

What happens if you do not have enough work years

If you do not have enough work years for SSDI, you may still be able to receive Supplemental Security Income (SSI) if your income and resources are low enough. SSI has no work requirement and no work history requirement. You can be 18 years old, have never worked, and still receive SSI if you are disabled and meet the income limits.

The income and resource limits for SSI vary by state, but the federal limit is $943 per month in income and $2,000 in countable resources for an individual (in 2024). Some states add money on top of the federal amount.

Another option is to wait until you have accumulated more work years, then reapply for SSDI. If you are working now and earning above the SGA threshold, you are building work credits that may help you meet the requirement later.

How to find out your own work record

You can request a record of your earnings and work credits from Social Security by creating an account on ssa.gov or by visiting a local Social Security office. The agency will show you each year you worked, how much you earned, and how many quarters of coverage you received.

This record is important to check before you explore for SSDI, because it may contain errors. If Social Security has no record of earnings from a year when you actually worked, you can provide W-2 forms, tax returns, or other documents to correct it. Fixing errors before you explore is much easier than correcting them after.

You do not need to do this research yourself before explore — Social Security will pull your complete earnings record as part of the process process. But having your own copy beforehand can help you understand whether you are likely to meet the work requirement.

Frequently Asked Questions

Do I need to have worked in the last year to get SSDI?

Not necessarily. You need to have earned enough in 20 of the 10 years before you became disabled (unless you became disabled before age 31). You could have worked steadily from age 20 to 40, then stopped working, and still meet this rule at age 50 — as long as 20 of your work years fall within that 10-year window.

What if I worked but earned less than $1,550 per month?

Years where you earned less than the threshold do not count as work years for the purpose of meeting the work requirement. However, Social Security still includes those earnings in the calculation of your average, which affects your monthly benefit amount. So low-earning years do not help you meet the requirement, but they do lower your payment.

Can I count self-employment income the same way as wages?

Yes. Self-employment income counts toward the SGA threshold the same way wages do. You report it on your tax return, and Social Security uses your net self-employment income (after business expenses) to determine whether you earned enough in that year.

If I worked 15 years but became disabled at age 40, can I get SSDI?

It depends on the exact age when you became disabled. At age 40, you would need 19 work years. At age 35, you would need 14 years. If you became disabled at 32, you would need 11 years. Check the Social Security work-credit table for your exact age to know whether 15 years is enough.

Does military service count as work years?

Military service counts toward your work credits if you served on active duty before 1968, or if you received a dishonorable discharge. Otherwise, you earn work credits based on your civilian earnings. If you have questions about your specific military service, Social Security can review your record.