One of the most confusing parts of the VA system is the math. Veterans add up their ratings, expect one number, and get a lower one. This guide explains how combined ratings actually work, why it matters, and what each level pays in 2026.
Why 30 plus 20 does not equal 50
The VA does not add ratings together. It uses a "whole person" method (38 CFR 4.25). The idea: if you are 30 percent disabled, you are 70 percent "healthy." The next rating is applied to that remaining healthy portion, not to the whole.
Here is how it works with a 50 percent and a 30 percent rating:
- Start at 50 percent disabled, so 50 percent "healthy" remains
- Apply the 30 percent rating to that remaining 50 percent: 30 percent of 50 is 15
- Add: 50 plus 15 equals 65 percent
- Round to the nearest 10: 70 percent
So 50 and 30 combine to 70, not 80. The VA rounds the final number to the nearest 10.
Why it gets harder near the top
The higher your combined rating, the harder each additional point becomes, because each new rating is applied to an ever-smaller "healthy" remainder. Getting from 90 to 100 percent is notoriously difficult through math alone.
This is exactly why secondary conditions matter. Several smaller ratings, stacked correctly, can push you across a bracket that a single condition never would.
What each level pays in 2026
VA disability compensation is tax-free. For a single veteran with no dependents, 2026 monthly rates include:
- 10 percent: $180.42
- 70 percent: $1,808.45
- 80 percent: $2,044.89
- 100 percent: $3,938.58 ($47,262.96 per year)
These reflect the 2.8 percent cost-of-living increase effective December 1, 2025. Veterans rated 30 percent or higher receive additional compensation for dependents.
Notice the jumps. Moving from 80 to 100 percent is a large monthly difference, which is why the last stretch is worth pursuing when the evidence supports it.
TDIU: another path to the 100 percent rate
If service-connected conditions prevent you from holding steady work, you may qualify for Total Disability based on Individual Unemployability (TDIU), which pays at the 100 percent rate even if your combined schedular rating is below 100 percent.
A real-world example
A veteran had a 50 percent and a 30 percent rating and could not understand why the VA said 70, not 80. Once he understood the whole-person math, he also saw the opportunity: adding two well-supported secondary conditions moved his combined rating up a bracket, which meant a real monthly increase.