Are these calculators accurate?

All formulas follow VA.gov rate tables and 38 CFR § 4.25. Results are estimates — always verify final amounts at VA.gov or with your VSO.

How does VA combined rating math work?

The VA uses a ‘whole person’ method — not simple addition. Each rating is applied to your remaining able-bodied percentage. A 50% and 30% rating combines to 65%, not 80%.

Back pay is the lump sum owed from your effective date (when you filed) to your decision date. The average is $8,000–$50,000+ depending on rating and wait time.

Can VA disability income count toward a mortgage?

Yes. Lenders can gross up non-taxable VA disability income by 25% for DTI purposes, which significantly increases your qualifying amount.

How often are these rates updated?

VA disability rates change every December 1 with the annual COLA adjustment. All calculators on this site are updated the same day.

What do people get wrong about Special Monthly Compensation (SMC) Basics? Treating every SMC level as an add-on. Most levels replace standard disability pay; SMC-K is the common add-on exception.

Treating every SMC level as an add-on. Most levels replace standard disability pay; SMC-K is the common add-on exception.

What do people get wrong about Special Monthly Compensation (SMC) Basics? Assuming the calculator can prove entitlement. SMC level decisions still require VA medical evidence review.

Assuming the calculator can prove entitlement. SMC level decisions still require VA medical evidence review.

What do people get wrong about Special Monthly Compensation (SMC) Basics? Stacking SMC-K on levels where the calculator notes it does not stack.

Stacking SMC-K on levels where the calculator notes it does not stack.

Special Monthly Compensation (SMC) Basics

The SMC calculator organizes the estimate around letter levels from K through T. Most levels replace standard disability pay with a higher amount, while SMC-K is added on top of existing compensation.

Example

Worked example

Example: a veteran has one SMC-K qualifying condition. The SMC calculator uses the 2026 SMC-K rate of $139.87/month.

Because SMC-K is added on top of regular disability compensation, one SMC-K award adds $139.87/month to the veteran's existing VA disability pay estimate.

Common mistakes

What people get wrong

Treating every SMC level as an add-on. Most levels replace standard disability pay; SMC-K is the common add-on exception.
Assuming the calculator can prove entitlement. SMC level decisions still require VA medical evidence review.
Stacking SMC-K on levels where the calculator notes it does not stack.

Run the numbers

Use the matching calculator to test your own dates, ratings, dependents, income, or benefit category with the same methodology described here.

Try the SMC Calculator