Your SSDI payment is based on your lifetime earnings record, not on how disabled you are or how much you need

The Social Security Administration calculates your Primary Insurance Amount (PIA) using a formula that looks at your highest 35 years of earnings. The agency does not consider your medical condition, your current expenses, or whether you have dependents. Two people with identical disabilities can receive very different payments depending on how much they earned before they stopped working.

The calculation happens in three steps: Social Security finds your average monthly earnings over your highest-earning 35 years, applies a bend-point formula to that average, and then rounds down to the nearest dollar. You can see your own earnings record and a rough estimate of your payment by creating a my Social Security account online at ssa.gov.

Your actual payment may be higher or lower than the estimate because Social Security does not finalize the amount until your claim is approved. If you worked for a government employer that did not pay into Social Security, a separate rule called the Government Pension Offset may reduce your payment.

Key Takeaways

  • Your SSDI payment depends on how much you earned, calculated from your 35 highest-earning years, not on how disabled you are.
  • You can view your earnings record and see a payment estimate by logging into my Social Security at ssa.gov using your Social Security number.
  • The bend-point formula replaces a higher percentage of lower earnings and a lower percentage of higher earnings, so lower-wage workers receive a larger percentage of their average earnings back.
  • If you worked for a government employer that did not pay Social Security taxes, the Government Pension Offset may reduce your SSDI payment by up to two-thirds of your government pension.
  • Your payment amount does not change based on your living situation, medical expenses, or family size, though your family members may receive their own payments based on your record.

How Social Security calculates your average monthly earnings

Social Security pulls your earnings record from the taxes you and your employers paid into the system. The agency counts your 35 highest-earning years and divides the total by 420 months (35 years × 12 months). This number is called your Average Indexed Monthly Earnings (AIME).

If you have fewer than 35 years of earnings, Social Security counts the missing years as zero. This is why people who took time out of the workforce for caregiving, unemployment, or other reasons often receive lower payments than they would if they had worked continuously.

The agency indexes your earnings to account for wage growth over time. Earnings from earlier years are adjusted upward to reflect what those wages would be worth in the year you turn 60 (or the year you become disabled, if that is earlier). This means your 1990 earnings are not compared directly to your 2020 earnings — they are adjusted so the comparison is fair.

The bend-point formula that determines your payment rate

Once Social Security knows your AIME, it applies a bend-point formula that replaces a higher percentage of lower earnings and a lower percentage of higher earnings. The formula has two bend points, and the percentages change each year based on national wage growth.

For 2024, the formula works roughly like this: Social Security replaces 90 percent of the first $1,174 of your AIME, then 32 percent of earnings between $1,174 and $7,078, then 15 percent of anything above $7,078. These dollar amounts (called bend points) increase each January. The result is that a worker who earned $20,000 a year receives a much larger percentage of their pre-disability income than a worker who earned $100,000 a year.

The bend-point formula is why SSDI is sometimes described as "progressive" — it provides a higher replacement rate for lower-wage workers. However, the absolute dollar amount is still higher for higher-wage workers in most cases.

What happens if you worked for a government employer

If you worked for a federal, state, or local government employer that did not withhold Social Security taxes, you may be subject to the Government Pension Offset (GPO). This rule reduces your SSDI payment by two-thirds of the government pension you receive.

For example, if you receive a $900 monthly government pension, two-thirds of that ($600) is subtracted from your SSDI payment. In some cases, the GPO can reduce your payment to zero. The GPO applies only to pensions from work where you did not pay Social Security taxes — a pension from a job where you did pay Social Security taxes does not trigger the offset.

You can find out whether your government employer withheld Social Security taxes by reviewing your Social Security earnings statement or by calling Social Security at 1-800-772-1213. If you are unsure, ask your government employer's human resources or pension office directly.

How to find your earnings record and payment estimate

The fastest way to see what Social Security has on file for you is to create or log into your my Social Security account at ssa.gov. You will need your Social Security number, email address, and a way to verify your identity (usually a driver's license or state ID number).

Once you are logged in, click "Benefit Estimates" to see a rough estimate of what you would receive at different ages. The estimate is based on your current earnings record and assumes you continue working at your recent earnings level. The estimate updates once a year, usually in September or October.

If you see errors in your earnings record — missing years, wrong amounts, or earnings credited to the wrong year — you can file a correction request through your my Social Security account or by calling 1-800-772-1213. Corrections must usually be requested within three years, three months, and 15 days of the year the earnings were reported, though exceptions exist for certain situations.

Why your estimate may not match your actual payment

The estimate you see in my Social Security is based on your current record and does not account for several things that can change your actual payment. If you have a break in your work history that you did not know about, or if you worked under a different name or Social Security number at some point, your record may be incomplete.

Social Security also does not finalize your payment amount until your claim is approved. During the approval process, the agency may discover earnings you did not report, or it may find that you are subject to the Government Pension Offset or another rule that reduces your payment. The agency will send you a notice explaining your actual payment amount once the claim is decided.

If you disagree with the payment amount you receive, you can request that Social Security recalculate your benefit or review your earnings record. You have 60 days from the date on the notice to file an appeal, though you can request reconsideration at any time.

How family members' payments are calculated

If you are approved for SSDI, your spouse, ex-spouse, and children under 19 (or up to 22 if in high school) may receive their own payments based on your earnings record. These payments do not reduce your own payment, but they do count toward the family maximum.

The family maximum is usually 150 to 180 percent of your Primary Insurance Amount. If the total of all family members' payments would exceed this maximum, Social Security reduces each family member's payment proportionally so the total does not go over. For example, if your PIA is $1,500 and the family maximum is $3,750, and your spouse and two children would each receive $1,000, Social Security would reduce each payment so the total equals $3,750.

Your family members must meet their own requirements to receive payments — a spouse must be at least 62 years old (or any age if caring for a child under 16), and children must be unmarried and under the age limit. Social Security calculates each family member's payment separately based on their relationship to you and their age.

Frequently Asked Questions

Can I see exactly how much I will receive before I explore?

You can see an estimate through my Social Security, but the exact amount is not final until Social Security approves your claim. The estimate assumes you continue working at your recent earnings level and does not account for the Government Pension Offset or other rules that might explore to you. Once your claim is approved, Social Security will send you a notice with your actual payment amount.

Does my SSDI payment increase if I have dependents or high expenses?

No. Your SSDI payment is based only on your earnings record. However, your spouse, ex-spouse, and children may receive their own separate payments based on your record. Your living situation, medical costs, and family size do not affect your payment amount.

What if I worked part-time or had years with no income?

Social Security counts your 35 highest-earning years. If you worked part-time or had years with no income, those years count as zero in the calculation. This lowers your average and reduces your payment. Years spent in school, raising children, or unemployed all count as zero unless you had some earnings that year.

Will my payment change after I start receiving SSDI?

Your payment increases each January by a cost-of-living adjustment (COLA) if there is one. The COLA is based on inflation and is the same percentage for all beneficiaries. Your payment does not change based on your medical condition, your work history after you start receiving SSDI, or changes in your living situation.

How do I know if the Government Pension Offset applies to me?

The GPO applies only if you receive a pension from government work where you did not pay Social Security taxes. Check your Social Security earnings statement or call 1-800-772-1213 to confirm whether your government employer withheld Social Security taxes. If you are unsure, contact your government employer's pension office directly.