What determines how much you receive each month

Social Security calculates your SSDI payment based on your Primary Insurance Amount (PIA), which comes from your lifetime earnings record. The higher your average earnings during your working years, the higher your monthly payment. Social Security does not look at your current financial need, your age when you became disabled, or how severe your condition is—only what you earned before you stopped working.

Your PIA is calculated using a formula that applies to your earnings history from age 21 onward. Social Security drops out your lowest-earning years (usually five years) and averages the remaining 35 years of earnings. That average is then run through a bend-point formula that weights earlier earnings more heavily than later ones. The result is your PIA, which becomes your monthly SSDI payment once you are approved.

If you worked for only a few years or had very low earnings, your payment will be lower than someone with a longer, higher-earning work history. If you have not worked much at all, you may not have enough work credits to be found insured for SSDI in the first place.

Key Takeaways

  • Your monthly payment amount depends entirely on what you earned during your working years, not on how disabled you are or how much money you need.
  • Social Security averages your highest 35 years of earnings and applies a formula to calculate your Primary Insurance Amount, which is your monthly benefit.
  • You can see your own earnings record and an estimate of your future SSDI payment by creating a my Social Security account at ssa.gov.
  • If you worked for only a few years or had very low earnings, your SSDI payment will be lower, but you may still be insured if you have enough work credits.
  • Family members may also receive payments based on your record if you are approved for SSDI, which does not reduce your own payment.

How your earnings history is converted to a monthly amount

Social Security uses a three-step process to turn your lifetime earnings into a monthly payment. First, it indexes your earnings—adjusting older years' wages to account for inflation and wage growth—so that earnings from 1985 are not compared directly to earnings from 2020. Second, it selects your highest 35 years of indexed earnings and calculates your average monthly earnings. Third, it applies the bend-point formula, which is a set of dollar thresholds that determine what percentage of your average earnings you receive.

The bend-point formula is progressive, meaning it replaces a higher percentage of lower earnings than higher earnings. For example, in 2024, the formula might replace 90 percent of your first $1,174 in average monthly earnings, 32 percent of earnings between $1,174 and $7,078, and 15 percent of earnings above $7,078. These dollar amounts change each year. The result is your PIA—the amount you receive each month before any reductions.

You do not need to do this math yourself. Social Security maintains your earnings record and calculates your PIA automatically once you are approved. You can see your own record and an estimate of your future payment by creating a my Social Security account at ssa.gov and viewing your Social Security Statement.

Reductions that lower your monthly payment

Even after Social Security calculates your PIA, your actual monthly payment may be lower because of reductions. The most common reduction is the Government Pension Offset (GPO), which applies if you receive a pension from work where you did not pay Social Security taxes—typically government employment. The GPO reduces your SSDI payment by two-thirds of the pension amount, and in some cases can eliminate your payment entirely.

Another reduction is the Windfall Elimination Provision (WEP), which also applies to people with pensions from non-covered work. The WEP changes the bend-point formula used to calculate your PIA, usually resulting in a lower payment. Not everyone with a government pension is subject to WEP or GPO, and the rules are complex—if you have a pension from government work, contact Social Security directly to find out whether either reduction applies to you.

If you are under your full retirement age and earn income from work, your payment may also be reduced by the Earnings Test. For every two dollars you earn above a certain threshold (which changes yearly), Social Security withholds one dollar from your SSDI payment. Once you reach full retirement age, the Earnings Test no longer applies, and you can earn any amount without a reduction.

How family members' payments are calculated

If you are approved for SSDI, your spouse, ex-spouse, and unmarried children under 19 (or up to 22 if in high school full-time) may also receive payments based on your record. These are called auxiliary benefits. Each family member's payment is calculated as a percentage of your PIA—typically 50 percent for a spouse and 75 percent for each child—but the total paid to your entire family cannot exceed a family maximum, which is usually 150 to 180 percent of your PIA.

If your family maximum is reached, payments are divided proportionally among all family members. For example, if your PIA is $1,500 and your family maximum is $2,250, and you have a spouse and two children all receiving benefits, the $2,250 is split among the four of you rather than each person receiving their full percentage. Your own payment is never reduced because family members are on your record—the family maximum applies only to auxiliary beneficiaries.

Family members must meet their own requirements to receive benefits. A spouse must be at least 62 years old (or any age if caring for your child under 16), an ex-spouse must have been married to you for at least 10 years, and children must be unmarried and meet the age or school-attendance rules. Social Security will contact family members and explain their own payment amounts once you are approved.

Using your Social Security Statement to estimate your payment

The fastest way to see what your SSDI payment might be is through your my Social Security account. You can create one at ssa.gov using your email, username, and password. Once logged in, you can view your earnings record, check for any errors, and see an estimate of your future SSDI payment based on your current earnings history.

The estimate assumes you become disabled at your current age and have no further earnings. If you continue working, your payment may increase because Social Security will include those new earnings in your record. The estimate also assumes you have enough work credits to be insured for SSDI—if you do not, the estimate will not appear, and you will need to contact Social Security to find out how many credits you need.

If you do not have a my Social Security account, you can request a paper Social Security Statement by calling 1-800-772-1213 or visiting your local Social Security office. The statement shows your earnings history and an estimate of your future benefits. Keep in mind that estimates are based on current law and your current earnings record; they may change if you work more years or if Congress changes the benefit formula.

What happens to your payment if you work while receiving SSDI

If you are under full retirement age and earn income from work, the Earnings Test reduces your SSDI payment. In 2024, if you earn more than $23,400 per year, Social Security withholds $1 from your benefit for every $2 you earn above that threshold. The threshold is higher in the year you reach full retirement age. Once you reach full retirement age, you can earn any amount with no reduction to your payment.

SSDI also includes work incentives designed to help you test your ability to work without when ready losing your benefits. The most important is the Trial Work Period, which allows you to work and earn any amount for nine months (not necessarily consecutive) without any reduction to your SSDI payment. After the Trial Work Period ends, the Earnings Test applies for the next 36 months. If your earnings stay below the substantial gainful activity level (roughly $1,550 per month in 2024), you can continue receiving your full SSDI payment.

Other work incentives include the Plan to Achieve Self-Support (PASS), which lets you set aside income and resources for a work goal without affecting your benefits, and Impairment Related Work Expenses (IRWE), which deducts disability-related costs from your earnings when calculating whether you have exceeded the earnings threshold. These programs are complex, and Social Security's Work Incentives Planning and information (WIPA) projects offer free counseling to help you understand your options.

How cost-of-living adjustments affect your payment over time

Each year, Social Security adjusts SSDI payments by a Cost-of-Living Adjustment (COLA) to account for inflation. The COLA is based on the Consumer Price Index and is announced in October for the following year. In recent years, COLAs have ranged from 0 percent (in years with no inflation) to 8.7 percent (in 2023). Your payment increases by the same percentage as everyone else's, regardless of how much you earn or how long you have been receiving benefits.

The COLA applies automatically—you do not need to do anything to receive it. Your new payment amount takes effect in January of each year. If you are also receiving Medicare, your Part B premium may increase with the COLA, which can offset some of the benefit increase. Social Security mails a notice in December showing your new payment amount and any changes to your Medicare premiums.

Frequently Asked Questions

Can I see what my SSDI payment will be before I explore?

Yes. Create a my Social Security account at ssa.gov to view your earnings record and see an estimate of your future SSDI payment. The estimate assumes you become disabled at your current age and have no further earnings. If you do not have an account, call 1-800-772-1213 to request a paper Social Security Statement.

Why is my SSDI payment lower than I expected?

Your payment is based on your average earnings during your working years, not on your current need or how disabled you are. If you worked for only a few years, had low earnings, or had years with no earnings, your average will be lower and your payment will be smaller. You can review your earnings record in your my Social Security account to check for errors.

Will my family members' payments reduce my own payment?

No. Your payment is never reduced because your spouse, children, or other family members receive benefits based on your record. Each family member receives their own percentage of your PIA, but the total paid to the entire family cannot exceed the family maximum, which is usually 150 to 180 percent of your PIA.

What is the difference between my PIA and my actual monthly payment?

Your PIA is the amount Social Security calculates based on your earnings record. Your actual monthly payment may be lower if reductions explore—such as the Government Pension Offset if you have a government pension, or the Earnings Test if you work and are under full retirement age. Once you reach full retirement age, the Earnings Test no longer applies.

Does my SSDI payment increase if I continue working?

Yes, but only if your new earnings are higher than some of your earlier years. Social Security uses your highest 35 years of earnings to calculate your PIA, so if you work and earn more than you did in earlier years, those new earnings may replace lower years in the calculation and increase your payment. However, if you are under full retirement age, the Earnings Test may reduce your payment while you work.