SSDI Back Pay Calculator
This Calculator was created by
to assist our members in estimating their SSDI back pay*.
If you are also eligible for SSI during the 5-month SSDI waiting period,
use our Concurrent SSDI/SSI Back Pay Calculator.
To use this calculator follow the steps below:    
1. Enter the date of your application:          
    Ex: 1/1/09            
2. Enter the date Social Security has listed as your onset date which is the date they ruled your disability started:          
  Ex: 1/1/09            
3. Enter your monthly SSDI benefit amount:**          
  Ex: 950 or 950.00 (Do not use $ symbol)    
4. If you have dependents under 18 years of age (or 19 and full-time student), check the box by clicking in it.   Yes          
5. If an attorney has represented you at an ALJ hearing, check this box.   Yes          
6. Use Buttons at bottom to Recalculate, Clear Form & Print        
Back Pay Results    
  First Full month after Application              
  First Full month after Established Onset              
  Number of Retroactive Months              
  Five-Month Waiting Period Begins   (Can be no more than 17 months)    
  Benefits Begin   (Can be no more than 12 months)    
  Today's Date              
  Backpay calculated to ***          
  Months Backpay              
  Beneficiary Back Pay          
  Auxiliary (Dependent) Back Pay          
  Less Attorney Fees          
  Total Estimated Back Pay          
  For Period to          
* This program is not designed for SSI Backpay and is only an estimate. It does not figure in any repayments, offsets or other issues that may affect the back pay amounts.


** If you do not know your SSDI monthly benefit amount you can use Social Security's back pay calculators located here: .    
*** This program will show estimated back pay through the end of last month.    
  Please contact us with any questions or concerns at or