Special Monthly Compensation

SMC Back Pay Calculator

Did VA grant SMC or SMC-K with an effective date in the past? Enter what VA paid you before, what it awarded, and the dates on your decision letter. See the back pay owed month by month, at the rates VA paid in each year.

Rates Dec. 2013 to Nov. 2026Checked against VA and the Federal Register

Have your VA decision letter ready. You need the effective date, the date of the decision, the award VA paid you before, and the award it granted. Enter only what VA actually awarded. This estimates the money owed; it does not decide whether you qualify for SMC.

What VA paid you before

Your award before the effective date What VA paid for the months before your new award started. Choose 0% if VA paid you nothing.

SMC-K awards you already had

Your new award

Your award from the effective date From your decision letter. If the decision only added SMC-K, choose the same rating as in step 1.

SMC-K awards from the effective date

Count every SMC-K award you have from that date, old and new. VA does not add SMC-K to SMC-O / P or SMC-R, and SMC-L through N½ plus SMC-K stops at the SMC-O rate. How SMC-K adds up

Dates from your decision letter

Effective date The date your new award starts. VA pays from the first day of the next month.

Decision date The date on the letter. Back pay stops the month before, because later months are paid at the new rate.

End date (optional) Leave blank to count up to today. Use it to stop earlier, for example if your award changed again.

Dependents on your award

Enter who was on your award for the whole back pay period. VA pays for dependents at 30 percent or higher and on every SMC level. The first child is in the base rate; each added child adds a set amount.

Spouse Spouse needs aid and attendance

Children under 18

Children 18 or older in school

Dependent parents

Representative fee (optional)

An attorney or claims agent takes a share of my back pay

Back pay by rate year

Rates change every December 1 with the cost-of-living adjustment (COLA), so each row is one rate year.

Rate year	Months	Before, per month	New award, per month	Difference	Subtotal

How this calculator works

Back pay is the difference between what VA paid you and what your new award pays, for each month from your effective date until VA started paying the new rate. This calculator works that out one month at a time.

First month: VA pays from the first day of the month after the effective date (38 CFR 3.31), so the effective month itself is not owed.
Last month: VA pays each month on the first of the next. Back pay stops the month before the decision month, because later months arrive at the new rate.
Rates: each month uses the rates VA paid that month. Rates change every December 1, so a December uses the next year's table.
Dependents: added at 30 percent or higher and on every SMC level, using VA's published amounts for that year.
SMC-K: each award adds the SMC-K rate. VA does not add SMC-K to SMC-O / P or SMC-R, and SMC-L through N½ plus SMC-K cannot pass the SMC-O rate (38 CFR 3.350(a)).

Where the rates come from

Every rate from December 2013 to November 2026 comes from VA's own rate tables and was checked against the cost-of-living notices VA publishes in the Federal Register, which list the amounts in 38 U.S.C. 1114 and 1115. Where VA's tables disagree with themselves by a dollar or less, this calculator follows the amounts VA's own rules produce.

What it does not include

Effective dates before November 2013. Use the amounts in your VA letter.
Changes during the period, such as a new dependent or a second rating change. Use the end date to split the period into parts.
Amounts VA can hold back, such as a military retired pay waiver, severance or separation pay recoupment, drill pay, a reduction during a long hospital stay, or a past overpayment.

Sources

VA Special Monthly Compensation rates and Veterans disability compensation rates, with their past-rate pages
VA cost-of-living notices in the Federal Register, effective each December 1
38 CFR 3.31 (when payments start), 38 CFR 3.350 (SMC), 38 CFR 14.636 (fees)