VA Combined Rating Calculator: How VA Math Really Works
VA math combines multiple disability ratings using the “whole person” method, where each new rating applies only to your remaining healthy percentage. A 50% rating and a 30% rating combine to 65%, which rounds to 70% — not 80%. The VA Combined Ratings Table in 38 CFR § 4.25 automates this calculation.
Quick Facts
| Item | Details |
|---|---|
| Benefit | Calculates your combined VA disability rating and estimated monthly compensation |
| Eligibility | Veterans, active duty, Guard, Reserve with one or more service-connected disabilities |
| Application | Use free online calculators or VA’s Combined Ratings Table; no VA application required |
| Processing Time | Instant estimate; official rating determined by VA Regional Office |
| Official Agency | U.S. Department of Veterans Affairs (VA) |
| Required Forms | VA Form 21-526EZ to claim disability compensation |
| Updated For | 2026 compensation rates (effective December 1, 2025, with 2.8% COLA) |
What Is VA Math and Why Does It Exist?
VA math is the term Veterans use to describe the combined ratings method in 38 CFR § 4.25 that determines your overall disability rating when you have more than one service-connected condition. The VA does not simply add individual percentages together. It uses a “whole person” approach — each new disability rating is applied only to the percentage of your body that is still considered healthy.
The VA looks at a disability rating as the percentage of your working capacity that you can no longer use due to a service-connected condition. If you joined the military with no preexisting conditions, you would have 100% working capacity. Each service-connected disability chips away at that efficiency.
Why this matters: Your combined rating determines how much monthly VA disability compensation you receive. A combined rating that rounds up to the next 10% tier can mean hundreds of additional dollars per month. Understanding how the math works helps you verify your rating and spot potential errors.
What you should do next: Enter your individual disability ratings into a VA combined rating calculator before you file or appeal a claim, so you know what combined rating to expect.
How VA Math Really Works: Step-by-Step
VA math works by applying each disability percentage to what remains of your healthy body, starting with your highest rating and working down. Here is the exact method:
Start at 100% efficiency. The VA considers you fully healthy before any ratings are applied.
Apply your highest rating first. If your highest rating is 50%, subtract that from 100%, leaving 50% efficiency.
Apply the next rating to the remaining efficiency. A 30% rating applied to 50% efficiency removes 15 percentage points (30% of 50).
Add that value to your disability. Your disability becomes 50% + 15% = 65%.
Continue with remaining ratings. Apply each subsequent rating to what is left of your efficiency.
Round to the nearest 10%. The VA rounds the final combined value to the nearest 10%. A 65% combined value rounds to 70%.
Example: Three Disabilities
| Step | Rating | Math | Remaining Efficiency | Combined Disability |
|---|---|---|---|---|
| Start | — | — | 100% | 0% |
| 1 | 50% | 100 × 50% | 50% | 50% |
| 2 | 30% | 50 × 30% = 15% | 35% | 65% |
| 3 | 10% | 35 × 10% = 3.5% | 31.5% | 68.5% |
| Final | — | Round to nearest 10% | — | 70% |
Common mistake: Many Veterans assume 50% + 30% + 10% equals 90%. Using VA math, it combines to 68.5%, which rounds to 70%. That is a difference of 20 percentage points and hundreds of dollars per month.
VA Combined Ratings Table (38 CFR § 4.25)
Veterans May Qualify for Extra Benefits
Check available financial assistance, healthcare programs and other opportunities that may apply to you.
Check EligibilityThe VA Combined Ratings Table is the official chart in 38 CFR § 4.25 that shows the combined value of any two disability ratings without requiring manual calculation. To use the table, you first arrange your disabilities in order of severity, beginning with the highest rating. You then intersect the highest rating (left column) with the next highest rating (top row) to find their combined value. That result becomes your new starting point, and you repeat the process for each remaining rating.
Sample Combined Ratings Table (Partial)
| Rating | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 10% | 19 | 27 | 35 | 43 | 51 | 60 | 68 | 76 | 84 |
| 20% | 28 | 36 | 44 | 52 | 60 | 68 | 76 | 84 | 92 |
| 30% | 37 | 45 | 53 | 61 | 68 | 76 | 84 | 92 | 96 |
| 40% | 46 | 54 | 62 | 70 | 76 | 84 | 92 | 96 | 98 |
| 50% | 55 | 63 | 71 | 77 | 84 | 92 | 96 | 98 | 99 |
Source: 38 CFR § 4.25 Combined Ratings Table
How to read it: If you have a 50% rating and a 30% rating, find 50 in the left column and 30 in the top row. The intersection is 65. That means the combined value is 65%, which rounds to 70%.
What you should do next: Download the full Combined Ratings Table from the eCFR website or use a free online calculator that applies 38 CFR § 4.25 automatically.
What Is the Bilateral Factor and How Does It Work?
The bilateral factor is an additional 10% added to the combined value of disabilities affecting both arms, both legs, or paired skeletal muscles. It is defined in 38 CFR § 4.26. The bilateral factor is not a flat 10 percentage points added to your final rating — it is 10% of the combined value of the paired-extremity ratings, added before further combination.
How to Apply the Bilateral Factor
Identify bilateral disabilities. You must have compensable ratings on both sides of a paired body part (both arms, both legs, or one arm and one leg).
Combine the bilateral ratings first. Use the Combined Ratings Table to combine the left and right ratings.
Calculate 10% of that combined value. Multiply the bilateral combined value by 0.10.
Add — do not combine — that amount. Add the 10% value directly to the bilateral combined value.
Then combine with your other disabilities. Use the result as your starting point for remaining ratings.
Bilateral Factor Example
| Step | Disability | Rating | Calculation | Result |
|---|---|---|---|---|
| 1 | Right knee | 20% | — | 20% |
| 2 | Left knee | 10% | Combine 20% + 10% | 28% |
| 3 | Bilateral factor | — | 28% × 10% | 2.8% |
| 4 | Adjusted bilateral value | — | 28% + 2.8% | 30.8% |
| 5 | Other disabilities | — | Combine with remaining ratings | — |
Why the bilateral factor matters: In 2026, the difference between a 40% rating ($795.84/month) and a 50% rating ($1,132.90/month) for a Veteran alone is $337.06 per month — $4,044.72 per year. The bilateral factor can be the difference between those tiers.
Who qualifies: You must have service-connected disabilities affecting paired body parts. A right arm and left leg would not qualify because they are not paired. You do not need identical conditions on both sides — different conditions affecting paired extremities still qualify.
VA Disability Compensation Rates 2026
VA disability compensation is a tax-free monthly payment for Veterans with service-connected conditions. The 2026 rates took effect December 1, 2025, with a 2.8% cost-of-living adjustment (COLA).
| Combined Rating | Veteran Alone (Monthly) | Veteran + Spouse (Monthly) | Veteran + Spouse + 1 Child (Monthly) |
|---|---|---|---|
| 10% | $180.42 | $180.42 | $180.42 |
| 20% | $356.66 | $356.66 | $356.66 |
| 30% | $552.47 | $617.47 | $666.47 |
| 40% | $795.84 | $882.84 | $947.84 |
| 50% | $1,132.90 | $1,241.90 | $1,317.90 |
| 60% | $1,645.75 | $1,745.75 | $1,832.75 |
| 70% | $2,097.71 | $2,227.71 | $2,326.71 |
| 80% | $2,382.43 | $2,542.43 | $2,653.43 |
| 90% | $2,678.41 | $2,868.41 | $2,992.41 |
| 100% | $3,291.06 | $3,521.06 | $3,659.06 |
Source: VA.gov 2026 compensation rates, effective December 1, 2025
Important: Dependents (spouse, children under 18, dependent parents) only add compensation at the 30% rating level and above. Below 30%, the rate is the same regardless of dependents.
How to Use a VA Combined Rating Calculator
A VA combined rating calculator is a free online tool that applies the 38 CFR § 4.25 whole-person method and the 38 CFR § 4.26 bilateral factor automatically. You enter your individual disability ratings, identify any bilateral conditions, and add dependent information. The calculator returns your estimated combined rating and monthly compensation.
Step-by-Step Instructions
Enter each disability rating. Select the percentage (10%–100%) for every service-connected condition.
Identify bilateral conditions. If you have ratings for both arms or both legs, designate which side each rating applies to so the calculator applies the bilateral factor.
Enter dependents. Add your spouse, dependent children, and dependent parents if applicable.
Select marital status. Current spouse only — former or deceased spouses do not count.
Review your results. The calculator displays your combined rating, estimated monthly payment, and sometimes your actual (unrounded) combined value.
Common mistake: Using a calculator that does not apply the bilateral factor. If you have paired-extremity ratings, confirm the tool accounts for 38 CFR § 4.26. A correct calculator will show a higher combined rating than one that ignores the bilateral factor.
What you should do next: Compare your calculator result against the VA’s official Combined Ratings Table. If the results differ, review your bilateral conditions and rounding.
PACT Act and Combined Ratings
The PACT Act (Promise to Address Comprehensive Toxics Act of 2022) expanded VA disability benefits for Veterans exposed to burn pits, Agent Orange, and other toxic substances. It added more than 20 presumptive conditions, meaning Veterans no longer need to prove direct service connection for those conditions.
How the PACT Act affects your combined rating: Each new presumptive condition you are granted adds an individual rating that is combined using VA math. Filing one comprehensive claim for all qualifying conditions can yield a higher combined rating than filing separate individual claims.
What you should do next: If you served in a location covered by the PACT Act and have a qualifying condition, file a claim using VA Form 21-526EZ. Even a 10% rating for one PACT Act condition can move your combined rating into a higher tier when paired with existing ratings.
Latest rule change alert: In February 2026, the VA implemented an interim final rule that changes how disability ratings are determined — measuring how a disability presents during a specific appointment rather than measuring the disability itself. This means Veterans actively treating their conditions could receive lower ratings if symptoms appear improved during that snapshot. Senator Tammy Duckworth has demanded the VA rescind this rule, calling it a disincentive for Veterans to seek treatment. Monitor this development closely if you have a pending claim or rating review.
Common Mistakes That Reduce Your Combined Rating
Avoiding these errors can protect your rating and compensation:
Assuming ratings add normally. 50% + 50% equals 75% in VA math, not 100%. Always use the Combined Ratings Table or a calculator.
Forgetting the bilateral factor. If you have conditions affecting both arms or both legs, you may be missing an additional 10% of the combined value.
Failing to claim all qualifying conditions. Each additional service-connected condition adds value, even if it seems minor. A 10% rating can push a 65% combined value to 68.5% and round up to 70%.
Not reporting dependent changes. Marriage, new children, or a child turning 18 (if not in school) affects your compensation at 30% and above.
Rounding down manually. The VA rounds to the nearest 10%. A 64% combined value rounds to 60%, but a 65% rounds to 70%. Always verify the exact combined value before rounding.
Ignoring the PACT Act. New presumptive conditions may qualify you for ratings you have not claimed.
Using a calculator that ignores the bilateral factor. Verify that any online tool applies 38 CFR § 4.26.
Appeals Process for Combined Rating Decisions
If you disagree with your combined rating, you have three decision review options under the Appeals Modernization Act (AMA). For most VA benefits, you have one year from the date on your decision notice to request a review and preserve your earliest possible effective date.
| Review Option | VA Form | Best When | New Evidence? | Processing Goal |
|---|---|---|---|---|
| Supplemental Claim | VA Form 20-0995 | You have new and relevant evidence | Yes, required | 125 days average |
| Higher-Level Review | VA Form 20-0996 | VA made an error of fact or law on the existing record | No | 125 days average |
| Board Appeal | VA Form 10182 | You want a Veterans Law Judge to decide | Depends on docket | 365–730 days |
Key rules:
You can only pursue one review lane at a time for the same issue.
If a Higher-Level Review goes against you, you can file a Supplemental Claim or a Board Appeal.
Two Higher-Level Reviews in a row on the same issue are not allowed.
Two Board Appeals in a row on the same claim are not allowed.
What you should do next: If your combined rating seems lower than your own calculation, request a Higher-Level Review with VA Form 20-0996. If you have new medical evidence, file a Supplemental Claim with VA Form 20-0995 instead.
How to Apply for VA Disability Compensation
VA Form 21-526EZ is the Application for Disability Compensation and Related Compensation Benefits. Use this form when you want to apply for VA disability compensation and related benefits. You can apply online at va.gov instead of filling out a paper form. The form revision date is January 2026.
Required Documents
DD-214 (Certificate of Release or Discharge from Active Duty)
Military medical records
Private medical records and hospital reports
VA medical records
Lay statements from family, friends, or fellow service members
Nexus letter from a medical provider linking your condition to service
Processing time: The VA is currently streamlining VA Form 21-526EZ to reduce its length and complexity by the end of Calendar Year 2026. Simplified application forms are projected to be available by December 2026.
What you should do next: Apply online at va.gov/disability/file-disability-claim-form-21-526ez. The online tool walks you through each section and allows you to upload supporting documents electronically.
Common Questions
How does VA math work for three or more disabilities?
VA math applies each rating to your remaining healthy percentage, starting with your highest rating and working down. After combining all ratings, the VA rounds the final value to the nearest 10%. A 50%, 30%, and 10% combination equals 68.5%, which rounds to 70%.
Does the bilateral factor add 10% to my final rating?
No. The bilateral factor adds 10% of the combined value of your paired-extremity ratings — not 10 percentage points. If both knees combine to 28%, the bilateral factor adds 2.8%, bringing the bilateral value to 30.8% before other conditions are combined.
What is the highest combined rating I can get without a 100% schedular rating?
The highest combined rating below 100% is 90%. Because of rounding rules, it is mathematically possible to have multiple severe ratings that never reach 100% schedular. Veterans who cannot work due to service-connected conditions may qualify for Total Disability Individual Unemployability (TDIU), which pays at the 100% rate.
Can I have a 100% combined rating without any single 100% rating?
Yes. Multiple ratings can combine to 95% or higher, which rounds to 100%. For example, a 70%, 60%, and 50% combination rounds to 100%.
How often are VA compensation rates updated?
VA disability compensation rates are updated annually with a cost-of-living adjustment (COLA). The 2026 rates took effect December 1, 2025, with a 2.8% COLA.
Does the VA use the same math for TDIU?
TDIU (also called Individual Unemployability) pays at the 100% rate even if your combined rating is below 100%. To qualify, you generally need one disability rated at 60% or a combined rating of 70% with at least one disability at 40%, and you must be unable to maintain substantially gainful employment.
What happens if I disagree with my combined rating?
You can request a Higher-Level Review (VA Form 20-0996) if you believe the VA made an error, or file a Supplemental Claim (VA Form 20-0995) with new evidence. You have one year from the decision date to preserve your effective date.
Does the PACT Act change how combined ratings are calculated?
No. The PACT Act adds new presumptive conditions but does not change the VA math formula. Each new condition is rated individually and combined using 38 CFR § 4.25.
Can I use a VA combined rating calculator for a pending claim?
Yes. A calculator gives you an estimate of what your combined rating could be if your claimed conditions are granted. This helps you set expectations, but only the VA can issue an official rating.
What is the difference between a combined rating and a schedular rating?
A schedular rating is based solely on the VA Schedule for Rating Disabilities (VASRD) criteria. A combined rating is the result of applying VA math to multiple schedular ratings. TDIU is an extraschedular rating that pays at 100% based on unemployability, not a combined rating.
Key Takeaways
VA math combines disability ratings using the whole-person method in 38 CFR § 4.25 — ratings do not add normally.
A 50% and 30% rating combine to 65%, which rounds to 70% — not 80%.
The bilateral factor (38 CFR § 4.26) adds 10% of the combined value of paired-extremity ratings, not a flat 10 percentage points.
2026 compensation rates range from $180.42/month (10%) to $3,291.06/month (100% veteran alone), with a 2.8% COLA.
Dependents add compensation only at the 30% rating level and above.
The PACT Act added presumptive conditions that can increase your combined rating when claimed.
A February 2026 interim final rule changes how disability ratings are measured during exams — monitor this development.
Three appeal options exist: Supplemental Claim (new evidence), Higher-Level Review (no new evidence), and Board Appeal (Veterans Law Judge).
Use VA Form 21-526EZ to apply for disability compensation; simplified forms are projected by December 2026.
Always verify that any calculator applies the bilateral factor if you have paired-extremity conditions.
Official Resources
VA Disability Compensation — Official VA disability benefits hub.
VA Combined Ratings Table (38 CFR § 4.25) — Official combined ratings table.
Bilateral Factor (38 CFR § 4.26) — Official bilateral factor regulation.
VA Form 21-526EZ — Application for Disability Compensation.
Choosing a Decision Review Option — VA appeals guidance.
VA Disability Compensation Rates — Current payment tables.
PACT Act Information — VA PACT Act hub.
View Your Disability Ratings — Access your official ratings on VA.gov.
VA.gov — Official VA website.
Ask VA — Online inquiry portal.
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