How VA Math Really Works — And Why Your Rating Is Probably Wrong
Here is a fact that shocks most veterans: 70% + 30% does NOT equal 100% in the VA system. It equals 79% — which rounds to 80%. The VA uses a formula called the whole person method that almost nobody explains clearly. This guide breaks it down completely, shows you the bilateral factor bonus most veterans miss, and helps you understand exactly how every percentage is calculated.
Why Veterans Get Confused by VA Math
When most people hear you have a 70% rating and a 30% rating, they naturally assume the combined rating is 100%. That makes perfect sense in normal math. But the VA does not use normal math.
The VA uses what is called the whole person method — a formula established under 38 CFR Part 4 that was designed to prevent a veteran from exceeding 100% disability. The logic is this: each disability is applied not to 100%, but to whatever percentage of the whole person remains after previous disabilities are accounted for.
The result is a system where ratings never truly add up the way you would expect — and where many veterans are receiving less compensation than they actually earned.
The Whole Person Formula — Step By Step
Step 1: Start With 100% Whole Person
The VA begins by imagining you as a 100% able-bodied person. Each disability takes a percentage away from that remaining whole person.
Step 2: Apply Your Highest Rating First
Always sort your ratings from highest to lowest. The VA always applies the largest disability first.
Step 3: Apply Each Rating to What Remains
Each additional rating is applied only to whatever percentage of the whole person remains — not to the original 100%.
Step 4: Round to the Nearest 10%
The VA rounds your final combined percentage to the nearest 10%. Numbers ending in 5 round up. Numbers ending in 4 round down.
Real Example: 70% + 30% Rating
More Real Examples of VA Math
Example: 50% + 40% + 20% Rating
Example: 30% + 20% + 10% + 10% Rating
The Bilateral Factor — The 10% Bonus Most Veterans Miss
Here is one of the most important and most overlooked parts of VA math. If you have service-connected disabilities affecting both arms, both legs, or paired skeletal muscles, the VA is required to add a 10% bonus to your bilateral ratings before plugging them into the whole person formula.
This is called the bilateral factor and it is established under 38 CFR Section 4.68. Most free VA calculators do not include it. Most veterans do not know about it. And many VSOs forget to apply it.
What Qualifies for the Bilateral Factor?
- Both knees (e.g. right knee 20% + left knee 20%)
- Both shoulders or both arms
- Both hips or both legs
- Both feet or both ankles
- Paired skeletal muscle groups on both sides
- Bilateral hearing loss
Bilateral Factor Example: Both Knees
With the correct bilateral factor: They enter as 39.6% — giving you a higher final rating and more monthly compensation. This is money you earned and the VA is required to pay it.
The Rounding Rule
After calculating your combined raw percentage, the VA rounds to the nearest 10%. Here is how it works:
| Raw Combined % | Rounds To | Monthly Pay (Single Vet) |
|---|---|---|
| 1% to 4% | 0% | $0 |
| 5% to 14% | 10% | $180.42 |
| 15% to 24% | 20% | $356.76 |
| 25% to 34% | 30% | $552.71 |
| 35% to 44% | 40% | $795.74 |
| 45% to 54% | 50% | $1,131.68 |
| 55% to 64% | 60% | $1,433.42 |
| 65% to 74% | 70% | $1,808.45 |
| 75% to 84% | 80% | $2,102.15 |
| 85% to 94% | 90% | $2,362.30 |
| 95% to 100% | 100% | $3,938.58 |
Why Your Rating Might Be Wrong Right Now
1. The Bilateral Factor Was Not Applied
If you have conditions affecting both sides of your body and the bilateral 10% bonus was not applied, you are being underpaid. This is one of the most common errors we see.
2. You Have Unrated Secondary Conditions
Secondary conditions caused by your primary service-connected conditions qualify for their own ratings. If your service-connected knee condition caused hip problems from altered gait, that hip condition may qualify as a secondary condition.
3. Your Ratings Have Not Been Updated As Conditions Worsened
A rating assigned years ago may no longer reflect the current severity of your condition. You have the right to file for an increase at any time if your condition has worsened.
4. You Have Not Filed for IU
If your service-connected disabilities prevent you from maintaining substantially gainful employment, you may qualify for Individual Unemployability — which pays you at the 100% rate even if your combined rating is lower.
Calculate Your Real VA Rating Right Now
Use our free VA Disability Calculator — the most complete one online. Enter your conditions, diagnostic codes, and get your exact combined rating with bilateral factor, SMC levels, and dependent pay instantly.
Use The Free CalculatorWhat To Do If Your Rating Is Wrong
File a Supplemental Claim
If you have new and relevant evidence, a Supplemental Claim is the fastest path to getting your rating reviewed. The VA must respond within 125 days.
Request a Higher-Level Review
If you believe the VA made a legal or factual error, you can request a Higher-Level Review — where a senior VA claims adjudicator reviews your file.
Get a Free VSO
Organizations like the DAV, VFW, American Legion, and AMVETS provide free accredited representation. A good VSO can review your rating, identify errors, and help you file the right claim at no cost to you.
The Bottom Line on VA Math
- Ratings do not add up — each is applied to the remaining whole person percentage
- Always sort highest to lowest — the order matters in the formula
- Claim the bilateral factor — if you have conditions on both sides you are owed a 10% bonus
- Watch the rounding thresholds — a raw rating of 45% rounds to 50% not 40%
- File for secondary conditions — they add real percentage points
- Consider IU — if you cannot work you may qualify for 100% pay
- Review your rating regularly — if conditions worsened file for an increase
You served this country. Every percentage point you have earned represents real monthly compensation — tax free, for life. Make sure you are getting all of it.