Back Pay Calculator
Estimate Your SSDI Back Pay
Most SSDI applicants receive back pay for the months between their protected onset date and approval. Use this tool to estimate yours.
Your details
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When did your disability begin?
When did you apply for SSDI?
Estimated back pay
$1,113,290
Based on 683 months of accumulated benefits after your 5-month waiting period.
- Protected onset (after 5-month wait)
- Jun 1969
- Attorney fee (25% capped at $7,200)
- $7,200
- Your net back pay after attorney fee
- $1,106,090
Plus $1,630 every month for as long as you remain disabled.
Wondering if your condition qualifies?
See our condition guides →
This SSDI benefit estimate is based on the Social Security Administration's 2026 PIA formula applied to your stated income history. Your actual SSDI benefit is determined by the SSA using your verified earnings record, which may differ from your estimate. This is not legal or financial advice. SSA benefit calculations are complex — consult a licensed Social Security disability attorney or contact the SSA directly at ssa.gov for your official benefit estimate.
How SSDI back pay works
SSDI back pay (sometimes called "past-due benefits") is the lump sum owed to you for months between your protected onset date — your disability onset plus a five-month waiting period — and the month you're approved. Initial decisions typically take 3–6 months; appeals to an Administrative Law Judge often take 12–24 months. Combined with the waiting period, this is why back pay totals are frequently $20,000–$80,000 or more.
Attorney fees are capped — by federal law
SSDI attorney fees are paid out of back pay, capped at the lesser of 25% of past-due benefits or $7,200. You owe nothing if your case isn't approved. Represented applicants are approximately 3x more likely to be approved at the hearing level.
Frequently asked questions
Your estimated back pay is up to $1,113,290.
An SSDI attorney can help you recover this — at no upfront cost to you. Federal law caps attorney fees at 25% of back pay or $7,200, whichever is less.
Get a Free Back Pay ReviewRepresented applicants are 3x more likely to be approved. No upfront cost. Ever.