Tool · Social Security Disability
Disability Back Pay Estimator
How Much Disability Back Pay Could You Get?
Enter when your disability began, when you applied and when regular payments start. The estimator applies SSA's 5-month SSDI waiting period and 12-month retroactive limit, then multiplies the months owed by your monthly benefit.
How Back Pay Is Counted
- SSDI waiting period. Generally, if your application for Social Security Disability Insurance (SSDI) is approved, you must wait 5 full calendar months from the date we find that your disability began before your entitlement can begin. ... However, there is no waiting period if your disability results from amyotrophic lateral sclerosis (ALS) and you are approved for SSDI benefits on or after July 23, 2020.
- SSDI retroactive limit. We can allow retroactivity up to 12 months for DIB claimants and their auxiliaries (i.e. child, young spouse). However, retroactivity cannot be before the NHs date of disability onset or 5-month waiting period.
- SSI start. The application effective date is the first day of the month following the later of the date the: application is filed; or individual becomes eligible for such benefits.
SSA estimates the average SSDI benefit for a disabled worker at $1,630 a month after the 2026 cost-of-living increase; your own amount is on your award notice.
Read the full guide to disability back pay, see 2026 benefit amounts, or estimate an SSI payment.
Frequently Asked Questions
How Far Back Does SSDI Back Pay Go?
SSDI can pay up to 12 months of benefits before the month you applied, but never for months before your disability began or during the 5-month waiting period.
Is There a Waiting Period for SSDI?
Yes. Generally you must wait 5 full calendar months from the date SSA finds your disability began. There is no waiting period if your disability results from ALS.
Does SSI Pay Back Pay?
SSI can pay for months after your application, starting with the month after you applied (or became eligible, if later). SSI doesn't pay for months before you applied.
Is This the Amount SSA Will Pay?
No. SSA sets your onset date, monthly amount and payment months. Use this to understand the math and check your notice.