You’ve just been approved for Social Security Disability Insurance. You’re relieved. You’re celebrating. Then Social Security deposits a lump sum into your account that’s far larger than your monthly benefit.
That’s your back pay, also called past due benefits. And if you don’t understand how it’s calculated, you might not realize whether you’re receiving the full amount you’re actually owed.
What Is SSDI Back Pay?
Back pay is the retroactive benefits Social Security owes you from the date you became disabled, not the date you applied. This can represent thousands or even tens of thousands of dollars.
Here’s the critical distinction: your application date and your onset date are different. Your onset date is when Social Security determines your disability actually began. Back pay is calculated from that onset date, minus a five-month waiting period that Social Security always imposes.
For example, if you became disabled on January 1, 2024, but didn’t apply until June 2024, Social Security won’t pay you for January through May anyway because of the waiting period. But if you’re approved and your onset date is January 1, 2024, you’ll receive back pay from June 2024 (after the waiting period) through the month you were approved. That could be eight, ten, or twelve months of retroactive payments.
How Back Pay Is Calculated
The calculation seems straightforward but has important nuances. Social Security multiplies your monthly benefit amount by the number of months between your onset date (plus five months) and your approval date.
But here’s where many people lose money: if you’ve been working and earning income during your approval process, Social Security may reduce your back pay based on those earnings. If you earned above the SGA (Substantial Gainful Activity) limit in any month during the waiting period for your back pay, Social Security subtracts that month’s benefit.
Additionally, if you received workers’ compensation during this period, Social Security may offset your SSDI back pay. Workers’ compensation benefits can reduce your SSDI back pay, so it’s important to disclose any such benefits when applying. Other government assistance programs may have offset rules as well, so full disclosure of all benefits received is critical.
Maximum Back Pay Amount
Social Security allows up to 12 months of retroactive benefits prior to your application date, regardless of how long you’ve been disabled. This is important. Even if you were disabled for three years before applying, you’ll only receive back pay for up to 12 months before your application date.
This is another reason timing matters. The longer you wait to apply after becoming disabled, the more you’re essentially leaving on the table because Social Security won’t pay more than 12 months retroactively.
When You Receive Your Back Pay
Most applicants receive their back pay as a lump sum payment around the time of approval. Social Security deposits this all at once, which can be surprising if you weren’t expecting it.
However, if your case involved legal representation, Social Security may deduct the attorney’s fees directly from your back pay. These fees are capped at the lesser of 25 percent of your back pay or $9,200. Make sure you understand this before hiring representation.
Don't Leave Money on the Table
Many people accept their back pay without question, trusting Social Security’s calculation. But errors happen. Social Security may miscalculate your onset date, fail to account for all months owed, or improperly offset your benefits based on other income.
If you believe your back pay is incorrect, you can request a recalculation. But you need to act quickly and understand the rules governing back pay.
At McKown and Myers, we help disabled individuals and veterans maximize their SSDI back pay and ensure they receive every dollar owed to them. If you’ve been approved for SSDI and have questions about your back pay, or if you believe your calculation is incorrect, call 765-668-7531 or fill out our contact form for a free consultation. You earned these benefits. You deserve the full amount owed to you.