The monthly amount you receive depends on your own work history, not on where you live

Illinois does not set its own disability payment amounts. Social Security calculates what you receive based on how much you earned during your working years—specifically, your average earnings over your 35 highest-earning years. Two people living on the same street in Illinois can receive very different monthly payments because their work histories are different.

The national average SSDI payment in 2024 is around $1,550 per month, but this is just an average. Some people receive $800 monthly; others receive $3,800 or more. Your actual amount depends entirely on your Social Security record, not on living costs in Illinois or any state factor.

When you explore for SSDI, Social Security calculates your Primary Insurance Amount (PIA)—the official term for your monthly benefit. This calculation happens at your local Social Security office or through their online portal, and the same formula applies whether you live in Chicago or Cairo.

Key Takeaways

  • Your SSDI payment is based on your own earnings record, not on Illinois cost of living or state programs.
  • Social Security uses your 35 highest-earning years to calculate your monthly amount, so the longer you worked and the more you earned, the higher your payment.
  • You can see an estimate of your future SSDI payment by creating a my Social Security account online before you explore.
  • If you have not worked much or worked at very low wages, your payment will be lower, but you may still be found disabled and receive something.

How Social Security calculates your specific amount

Social Security takes your earnings record and applies a formula that gives you a larger percentage of your early earnings and a smaller percentage of your later, higher earnings. This is called a bend point formula, and it is the same for everyone in the country. The formula is designed so that people who earned less during their working years get a slightly higher replacement rate than people who earned more.

For example, if you earned $20,000 per year for 35 years, your calculation will be different from someone who earned $60,000 per year for 35 years. But both calculations use the same bend points and percentages—the difference is only in the input (your actual earnings).

You do not need to understand the formula yourself. When you explore, Social Security will calculate it for you. If you want to see an estimate before you explore, you can create a free account at ssa.gov and view your Social Security Statement, which includes a projection of what you might receive.

What happens if you have not worked much or worked at low wages

If your work history is short or your earnings were low, your SSDI payment will be lower. There is no minimum payment amount—Social Security will calculate whatever your record produces. Some people receive $400 or $500 monthly; others receive $200. You are still may be able to access for SSDI if you meet the medical and work-history requirements, regardless of how small the payment is.

If you have a spouse or children under 19 (or 19 if still in high school), they may be able to receive payments based on your record, even if your own payment is small. These are called family benefits, and they do not reduce your payment—they are separate. A spouse at full retirement age can receive up to 50 percent of your PIA; a child can receive up to 75 percent of your PIA.

Supplemental Security Income (SSI) is different from SSDI in Illinois

If your SSDI payment is very low or you have not worked enough to may have access to for SSDI, you may instead be found disabled under a different program called Supplemental Security Income (SSI). SSI is a needs-based program, meaning it looks at your income and assets, not just your medical condition. SSI payments in Illinois follow a federal base amount, which in 2024 is $943 per month for an individual, but Illinois adds a small state supplement on top of that.

You cannot receive both SSDI and SSI at the same time. Social Security will determine which program you may have access to for based on your work history and financial situation. If you have worked very little, SSI may be the program that helps you.

Cost of living adjustments happen every year

Every January, Social Security increases all SSDI payments by a percentage called the Cost of Living Adjustment (COLA). This adjustment is the same for everyone receiving SSDI, regardless of state. In 2024, the COLA was 3.2 percent. In 2023, it was 8.7 percent. The percentage changes each year based on inflation.

You do not have to do anything to receive the increase—it happens automatically. Your January payment will be higher than your December payment by the COLA percentage. This means your payment amount will change slightly every year, but the change is not based on where you live.

How to see your payment estimate before you explore

The fastest way to see what you might receive is to create a my Social Security account at ssa.gov. You will need your Social Security number and an email address. Once you log in, you can view your earnings record and see a projection of your SSDI payment at your full retirement age, as well as what you would receive if you became disabled today.

This estimate is not a promise—it is based on your current earnings record and assumes you stop working now. If you continue working and earning, your estimate may go up. If there are errors in your earnings record, the estimate will be wrong until those errors are corrected.

If you do not want to create an online account, you can call Social Security at 1-800-772-1213 and ask for an estimate. You will need your Social Security number and your most recent tax return or W-2 form.

What to expect after you are approved

Once Social Security approves your SSDI claim, they will send you a letter stating your monthly payment amount and your start date. Your first payment usually arrives within two weeks of approval. Payments are deposited directly into your bank account—you cannot receive a check by mail.

If you disagree with the amount Social Security calculated, you have the right to request a reconsideration. This means Social Security will review your earnings record again to make sure the calculation was correct. You must request reconsideration within 60 days of receiving your approval letter.

Frequently Asked Questions

Can I see my payment amount before I explore?

Yes. Create a free account at ssa.gov and view your Social Security Statement, which includes a projection of your SSDI payment. You can also call 1-800-772-1213 and ask for an estimate over the phone.

Does Illinois give extra money on top of SSDI?

No. SSDI is a federal program and the payment is the same in every state. Illinois does not add money to SSDI payments. If you receive SSI instead, Illinois does add a small state supplement, but this is a different program.

What if I worked in another state before moving to Illinois?

It does not matter. Social Security counts all your earnings from all states. Your SSDI calculation includes every year you worked and paid Social Security taxes, regardless of which state you were in.

Will my payment go down if I move out of Illinois?

No. Your SSDI payment is based on your earnings record and does not change if you move to a different state or country. The amount stays the same.

What if my earnings record has mistakes on it?

You can correct errors by creating a my Social Security account and reviewing your earnings record, or by calling 1-800-772-1213. If you find a mistake, Social Security can correct it, and your payment estimate will be recalculated. You should check your record before you explore.