VA Combined Rating: How VA Math Actually Works

Method verified against 38 CFR 4.25 and the VA combined ratings table. Reviewed October 2026.

The most common question in the VA system has a four word answer that satisfies nobody: the VA does not add. A veteran with ratings of 50 and 30 is not 80 percent disabled in the VA’s eyes, and the 65 that becomes 70 on the award letter follows a formula written into federal regulation. This page walks the whole person method step by step, the rounding rule that swings real money, the bilateral factor that works in your favor, and the strategy the math quietly creates.

The Whole Person Method, Step by Step

The VA treats you as starting at 100 percent efficiency, and each rating removes a percentage of whatever efficiency remains, largest rating first.

Example: ratings of 50, 30, and 10.

• Start at 100 percent efficient. The 50 percent rating takes half: 50 remains, and you are 50 percent disabled.
• The 30 percent rating takes 30 percent of the remaining 50, which is 15. You are now 65 percent disabled, 35 remains.
• The 10 percent rating takes 10 percent of the remaining 35, about 4. Combined value: 69.
• Round to the nearest 10: 69 becomes 70. You are paid at the 70 percent rate.

Three conditions that feel like 90 pay at 70, and the pattern only sharpens from there: each new small rating applies to a shrinking remainder, which is why a veteran at 80 can add a new 10 percent condition and see the check not move at all.

The Rounding Rule: Where Single Points Swing Hundreds

Combined values ending in 5 or higher round up, 4 or lower round down: 34 pays at 30, 35 pays at 40. That single point boundary is worth real money every month, which is why an accurate rating on even a small condition matters, and why a claim that moves one condition from 10 to 20 can cascade a combined 64 into a 65 and a whole payment tier, the tiers themselves in our rates table.

The Bilateral Factor: The One Rule That Adds

When disabilities affect paired limbs, both knees, both shoulders, an arm and a leg, the VA combines those ratings first, then adds 10 percent of that combined value on top before folding in everything else. It is the only place in the system where the math bends toward the veteran, and it is applied automatically, though checking your rating decision for the words bilateral factor is a two minute audit worth doing when paired limbs are involved.

What the Math Means for Strategy

Two honest consequences follow from the formula. Climbing from 70 to 100 by stacking small ratings is nearly impossible, because each addition shrinks: the realistic paths upward are an increase in a major existing rating, a significant new condition including secondary conditions caused by service connected ones, or TDIU, which pays the 100 percent rate when service connected conditions prevent substantial work, no matter what the combined math says. And every path starts as a claim or an appeal, walked in our claims guide and appeals guide.

Frequently Asked Questions

Why is my VA rating not just my ratings added up?

Federal regulation requires the whole person method: each rating applies to your remaining capacity rather than to 100. It is designed so no one exceeds 100 percent, and the practical effect is that combined ratings always land at or below the simple sum.

What do 50 and 30 combine to?

65, paid at 70 after rounding. Add a 10 and the value reaches 69, still 70. The official combined ratings table on VA.gov runs the same math for any pair.

Why did my payment not change when I won a new 10 percent rating?

Because 10 percent of your small remaining capacity was not enough to cross a rounding boundary. The rating still matters: it is service connected now, protected, and positioned to count if it worsens.

What is the bilateral factor worth?

An extra 10 percent of the combined value of the paired limb ratings, applied before the rest of the math. For a veteran with two 20 percent knees, it is often the difference of a full payment tier.

How do I get from 70 to 100?

Realistically: an increase in a major rating, a substantial new or secondary condition, or TDIU if working is no longer possible. Stacking small ratings rarely moves the number, and the TDIU route pays the same 100 percent rate on our monthly schedule.

The Bottom Line

Largest rating first, each one against what remains, round to the nearest ten, and paired limbs get 10 percent extra before the fold. Run your own numbers, audit the decision letter for the bilateral factor, and when the math itself is the ceiling, remember that TDIU was built for exactly that case.