VA Claim Percentage Calculator
VA disability ratings don’t add up the way most veterans expect. A 50% rating plus a 30% rating doesn’t equal 80% — the VA uses a special combined ratings formula that applies each new rating to your remaining “efficiency.” The VA Claim Percentage Calculator runs that formula for up to three disability ratings, showing your exact combined percentage, the rounded final rating the VA actually pays, and your remaining efficiency.
Enter up to three disability ratings as percentages. The calculator sorts them from highest to lowest (as the VA does), then applies each rating to the efficiency left by the previous ones. The result is the combined rating before rounding, plus the final rating rounded to the nearest 10% — the number that determines your monthly compensation.
Veterans filing new claims, those appealing decisions, and advocates helping others understand their ratings will find this indispensable. Worked examples show a 50+30 combination and a three-rating case computed step by step.
What Is the VA Combined Ratings Formula?
The VA rates each disability separately, then combines them with the formula: combined = 1 – (1 – a) × (1 – b) × (1 – c)…, where a, b, c are the ratings as decimals. Conceptually, you start at 100% “efficiency” (a fully healthy person). The highest rating takes its bite first: a 50% rating leaves 50% efficiency. The next rating applies to what’s left: 30% of the remaining 50% is 15%, so the combined rating becomes 65%, not 80%.
This diminishing-returns math surprises almost everyone. A 50% + 30% + 20% combination yields 72% combined (rounded to 70%), not 100%. The formula ensures the total can never exceed 100% and reflects the VA’s view that each additional disability affects a person already impaired. A simple illustration: ten 10% ratings combine to just 65%, showing how the formula compresses multiple small ratings.
Why the Combined Rating Matters
Your final combined rating — rounded to the nearest 10% — is the single number that sets your monthly tax-free compensation. The difference between 70% and 80% is hundreds of dollars per month, so understanding exactly how your ratings combine is financially crucial. A veteran at 73% combined rounds to 70%; pushing to 75% would round to 80% — a life-changing threshold.
The combined rating also unlocks benefit tiers. A 100% rating (or TDIU) opens additional benefits like dental care and commissary access. Some states tie property tax exemptions to specific rating levels. Knowing your precise combined percentage helps you decide whether filing for an increase or a secondary condition is worth the effort.
How to Use the VA Claim Percentage Calculator
Step 1: Gather your individual disability ratings from your VA decision letter (each is a multiple of 10 between 0 and 100). Step 2: Enter Disability Rating 1 in the first field. Step 3: Enter Disability Rating 2 in the second field (leave blank if you have only one rating). Step 4: Enter Disability Rating 3 in the third field (optional). Step 5: Click Calculate to see the exact combined rating, the rounded final rating, and your remaining efficiency. Step 6: Click Reset to try different combinations.
Worked Example 1: 50% and 30% Ratings
For ratings of 50% and 30%:
Step 1: Sort highest first: 50, 30. Step 2: Start with 100% efficiency. Apply 50%: 100 × (1 – 0.50) = 50% efficiency remaining. Step 3: Apply 30% to the remainder: 50 × (1 – 0.30) = 50 × 0.70 = 35% efficiency remaining. Step 4: Combined = 100 – 35 = 65%. Step 5: Round to nearest 10%: 65 rounds to 70% (VA rounds 65 up). The veteran is paid at the 70% rate, not 80%.
Worked Example 2: 50%, 30%, and 20% Ratings
For ratings of 50%, 30%, and 20%:
Step 1: Efficiency after 50%: 100 × 0.50 = 50%. Step 2: After 30%: 50 × 0.70 = 35%. Step 3: After 20%: 35 × 0.80 = 28% efficiency remaining. Step 4: Combined = 100 – 28 = 72%. Step 5: Rounded final: 70%. Note that adding the 20% rating only moved the combined from 65% to 72% — seven points, not twenty — demonstrating the formula’s compression.
Understanding the Rounding Rules
The VA rounds the exact combined rating to the nearest 10%, with 5s rounding up. So 64% becomes 60%, 65% becomes 70%, 74% becomes 70%, and 75% becomes 80%. These rounding boundaries create critical thresholds: a veteran at 74% and one at 75% are one point apart but paid at different rates.
This makes the exact combined percentage (which the calculator shows to one decimal) strategically important. If you’re at 73.8%, a modest increase in any single rating — or a new 10% rating for a secondary condition — could push you over 75% into the next pay tier. Veterans appealing decisions should always compute the exact combined figure, not just the rounded one, to see how close they are to the next threshold.
Key Factors That Change Your Combined Rating
Rating order doesn’t matter mathematically — the formula is commutative — but the VA lists them highest-first by convention. Bilateral factor: if you have disabilities on both sides of the body (e.g., both knees), the VA adds a bilateral factor before combining with other ratings, slightly increasing the total. This calculator covers the standard combination; bilateral cases need the specialized bilateral calculator.
New claims and increases recalculate the entire combination — a higher rating on one condition ripples through the math. Zero-percent (noncompensable) ratings don’t change the combined percentage but establish service connection, allowing future increases. Finally, TDIU (Total Disability based on Individual Unemployability) can pay at the 100% rate even when the combined rating is lower, if the disabilities prevent substantially gainful employment.
The efficiency concept deserves emphasis: the “remaining efficiency” the calculator reports is the VA’s model of your residual work capacity. A veteran at 72% combined has 28% efficiency remaining. While it’s an abstraction, it explains why the math works the way it does — each rating is a tax on what’s left, not on the original whole.
Pyramiding rules also affect claims: the VA won’t rate the same symptom under two diagnoses. If two claimed conditions produce overlapping symptoms, the VA combines them into a single rating before applying the combined-ratings formula. Understanding this prevents the disappointment of expecting two ratings where the VA will grant one.
Tips for Maximizing Your VA Rating
- Always compute the exact combined percentage — rounding thresholds are where money is won or lost.
- Claim all secondary conditions; even a 10% rating can push you over a rounding boundary.
- Understand the bilateral factor if you have paired disabilities — it adds real percentage points.
- Don’t assume ratings add; 50+30=65 combined, not 80.
- Check for pyramiding before filing — overlapping symptoms get one rating, not two.
- Keep medical evidence current; stale records sink increase claims.
- Consider TDIU if your combined rating is 70%+ but you can’t work.
- Appeal within deadlines — a successful appeal backdates benefits to the original claim.
- Use the remaining-efficiency figure to sanity-check the VA’s math on your decision letter.
Frequently Asked Questions
1. Why don’t VA ratings just add up?
Because the VA models disability as a tax on remaining efficiency, not on the whole person. Each rating applies to what’s left after previous ratings. This prevents totals over 100% and reflects that a second disability affects an already-impaired person.
2. How does the VA round combined ratings?
To the nearest 10%, with 5s rounding up: 64→60, 65→70, 74→70, 75→80. The rounded figure is your official rating for pay purposes.
3. What is the bilateral factor?
When you have disabilities on both sides of the body, the VA adds half the combined value of the bilateral conditions as extra compensation before combining with other ratings. It typically adds a few percentage points.
4. Can my combined rating exceed 100%?
No — the formula asymptotically approaches but never reaches 100% from below (mathematically it can’t exceed it). The maximum schedular rating is 100%.
5. What is TDIU?
Total Disability based on Individual Unemployability pays at the 100% rate when service-connected disabilities prevent substantially gainful employment, even if the combined rating is below 100% (generally 70%+ with one condition at 40%+).
6. Do 0% ratings matter?
Yes — a 0% (noncompensable) rating establishes service connection without changing the combined percentage. It preserves your right to seek an increase later if the condition worsens.
7. How do I know if I’m close to the next pay tier?
Compute your exact combined percentage. If you’re at 73-74%, you’re 1-2 points from rounding up to 80%. A new 10% secondary rating might get you there.
8. What is pyramiding?
The VA rule against rating the same manifestation under multiple diagnoses. If two conditions cause the same symptom, you get one rating for it, not two.
9. Can I have more than three ratings?
Absolutely — many veterans have five or more. The calculator handles three for simplicity; the formula extends identically. Sort all ratings highest-first and apply each to the running efficiency.
10. Does the order of ratings change the result?
No — multiplication is commutative, so the order doesn’t affect the combined percentage. The VA lists them highest-first by convention.
11. What if the VA’s math differs from mine?
Check for the bilateral factor, verify each individual rating, and confirm no pyramiding adjustments. If the discrepancy persists, the decision letter should show the VA’s step-by-step computation.
12. How often can I file for an increase?
Anytime, but you need evidence the condition worsened. Filing without new evidence wastes time. Annual checkups documenting decline build the record.
13. Do Social Security and VA ratings interact?
They’re independent systems. SSDI approval doesn’t change your VA rating, though the medical evidence may support a VA increase claim.
14. What is a CUE claim?
Clear and Unmistakable Error — a request to revise a final decision that contained a undebatable error. It’s hard to win but backdates benefits if successful.
15. Should I get a VSO or lawyer?
VSOs (Veterans Service Organizations) provide free claims help and are excellent for initial filings. Accredited attorneys or agents (who charge a contingency on back pay) can help with complex appeals.
CONCLUSION
The VA Claim Percentage Calculator demystifies the combined ratings formula: sort your ratings, apply each to the remaining efficiency, subtract from 100%, and round to the nearest 10%. The worked examples prove the method — 50+30 gives 65% combined (70% paid), and adding a 20% rating moves it to 72% (still 70% paid).
The single most important takeaway: always know your exact combined percentage, not just the rounded rating. The distance to the next 5-point rounding threshold is the most financially significant number in your VA claim — and now you can compute it yourself.