SSDI Benefit Calculator: Estimate Your Social Security Disability Payment

Understanding SSDI and SSI Disability Benefits in 2026

Navigating the Social Security disability system is one of the most challenging processes any American can face. With frequent initial denials and an appeal process that can take years, understanding your potential benefits before you apply is essential.

How SSDI Benefits Are Calculated

SSDI benefits are calculated using your Average Indexed Monthly Earnings (AIME) — your lifetime earnings adjusted for wage inflation — and the SSA's Primary Insurance Amount (PIA) formula. The 2026 bend points are $1,286 and $7,749. The formula gives you 90% of AIME up to the first bend point, 32% between the two bend points, and 15% above the second bend point. This progressive formula means lower earners replace a higher percentage of their pre-disability income.

The 5-Step SSA Disability Evaluation

The SSA uses a sequential five-step process to determine if you qualify. First, are you working above Substantial Gainful Activity ($1,690/month in 2026)? Second, is your condition severe? Third, does it meet or equal a Blue Book listing? Fourth, can you do your past work? Fifth, can you do any other work? A claim is approved when the evidence shows you cannot do your past work or any other work, which is why many applicants seek help from a disability attorney or accredited representative.

Why Most Claims Are Denied — And What To Do

Many initial applications are denied, often for technical reasons rather than medical ones: missing paperwork, incomplete medical records, or insufficient documentation of how your condition limits your daily activities. If you have been denied, do not give up. The usual deadline to appeal is 60 days, and our guides on why claims are denied and the appeals process explain your next steps.

SSDI Retroactive Payments (Back Pay) Calculator

SSDI back pay is generally your monthly benefit multiplied by the number of months you were entitled but not yet paid. Entitlement starts after a five-month waiting period that follows your established onset date, and benefits can reach back up to 12 months before the month you applied. The back pay figure in our calculator is only a rough illustration; the SSA works out the actual amount from your onset date, application date and award date. Read our guide to SSDI back pay and retroactive benefits.

SSDI Work Credits Calculator

Our calculator estimates a monthly benefit and does not count credits, but the basic rules are simple. You can earn up to four work credits a year based on your covered earnings, and most adults need 40 credits, with 20 of them earned in the 10 years before becoming disabled. Younger workers generally need fewer. The Social Security statement in your my Social Security account shows the credits on your record. See how age changes the credits you need.

SSI Child Disability Income Limits

There is no single income cutoff. For a child under 18 who lives with a parent, the SSA counts part of the parents' income and resources, called deeming, after allowing for the parents and other children in the household. The child's countable resources are generally limited to $2,000, and the federal payment is capped at the same $994 monthly rate that applies to an adult individual, reduced by any countable income. Check with the SSA for your household. Read how SSI for children is decided.