The Department of Veterans Affairs rates disabilities in 10 percent increments from 0 to 100, but a veteran with three conditions rated 60 percent, 30 percent, and 20 percent does not receive a 110 percent rating. Under 38 CFR § 4.25, the VA "Combined Ratings Table" treats each new disability as reducing a veteran's remaining efficiency, not their full 100 percent. That single rule confuses more veterans than almost any other part of the ratings process, and it directly determines the size of every monthly compensation check. This guide breaks down exactly how VA math works, how to build evidence that supports the strongest combined outcome, and what to check once a rating decision arrives.
Key Takeaways
- Understand that VA combines multiple ratings using 38 CFR § 4.25, not simple addition.
- Arrange conditions from most to least severe before running any combined-rating calculation.
- Gather a current, dated rating decision or medical evidence for every condition being combined.
- Apply the bilateral factor under 38 CFR § 4.26 when paired limbs are both service-connected.
- Verify the math on every rating decision letter before accepting the stated percentage.
- Pursue a supplemental claim or Higher-Level Review if the combined rating does not match the table.
Table of Contents
- Who This Affects: Eligibility for a Combined VA Rating
- Building the Evidence Case for Every Condition
- Claim Strategy: Sequencing Conditions and the Bilateral Factor
- Step-by-Step: Calculating Your Combined VA Rating
- After the Rating Decision: Verifying VA Math, TDIU, and Appeals
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Who This Affects: Eligibility for a Combined VA Rating
Any veteran with more than one service-connected disability is subject to combined-rating math. This includes veterans filing a first claim with multiple conditions at once, veterans adding a new condition to an existing rating, and veterans pursuing secondary conditions caused by an already-rated disability. Because the VA rates disabilities in 10 percent increments from 10 percent up to 100 percent, and because most veterans accumulate conditions over a career and afterward, combined-rating rules apply to the large majority of veterans who carry more than a single rated disability.
The rule exists because disability, in the VA's framework, is measured as a loss of overall efficiency rather than a stack of independent injuries. A veteran who is 60 percent disabled by one condition is treated as retaining 40 percent of "whole person" efficiency. A second disability is then applied against that remaining 40 percent, not against the original 100 percent. This is why combined ratings almost always land lower than simple addition would suggest, and why understanding eligibility for this math matters before a veteran estimates future compensation.
When Combined-Rating Math Does Not Apply
Combined-rating math is not used when a veteran has only one service-connected condition, since there is nothing to combine. It also does not directly apply to special monthly compensation add-ons, which are calculated separately and added after the combined schedular rating is finalized. Veterans evaluating whether Total Disability based on Individual Unemployability (TDIU) might apply should still calculate their combined schedular rating first, since TDIU has its own separate eligibility threshold built on top of that number.
Building the Evidence Case for Every Condition
Combined-rating math only works in a veteran's favor if each underlying condition is rated as accurately as possible first. A combined percentage is only as strong as the individual ratings feeding into it, so evidence-gathering has to happen at the condition level before the table math ever comes into play. Missing evidence on any single condition can lower that condition's rating, which lowers the combined result even if every other condition is fully documented.
Service Treatment Records and Private Medical Evidence
Every condition being combined needs its own supporting record: service treatment records showing an in-service event, injury, or diagnosis; private or VA treatment records showing a current diagnosis; and, where available, a nexus letter connecting the current condition back to service. Veterans with secondary conditions need medical evidence specifically linking the secondary condition to the already-rated primary disability, since the VA will not assume that link on its own.
Lay Statements and PACT Act Presumptive Conditions
Buddy statements from fellow service members, spouses, or family members can support conditions where medical records are thin, particularly for conditions that manifested gradually. Veterans with toxic exposure history should also check whether any of their conditions qualify as presumptive under the PACT Act of 2022, since presumptive conditions do not require the same level of nexus evidence and can strengthen the individual rating that feeds into the combined calculation.
Claim Strategy: Sequencing Conditions and the Bilateral Factor
Because the Combined Ratings Table in 38 CFR § 4.25 is order-independent in its final result but read in a specific sequence, veterans and their representatives arrange disabilities from the highest individual rating down to the lowest before applying the table. This does not change the final combined number, but it is the method the VA itself uses, and understanding it helps a veteran sanity-check a rating decision letter rather than simply trusting the printed percentage.
One factor that can meaningfully change the outcome is the bilateral factor under 38 CFR § 4.26. When a veteran has service-connected disabilities affecting both arms, both legs, or one arm and one leg, the VA adds a 10 percent bonus to the combined value of those paired conditions before combining them with any remaining disabilities. Veterans with bilateral joint conditions, such as both knees or both shoulders, should confirm this factor was applied, since it is easy for it to be missed in a manual rating calculation.
Sequencing Strategy for New Claims
When filing for multiple new conditions at once, there is no strategic advantage to filing them in a particular order on the application itself, since the combined math is applied after all ratings are assigned regardless of application order. The real strategic decision is which conditions to file with strong evidence first and which secondary conditions to develop with more time, since a stronger individual rating on any condition improves the combined result more than resequencing ever could.
Step-by-Step: Calculating Your Combined VA Rating
The official VA Combined Ratings Table example makes the process concrete. For three disabilities rated 60 percent, 40 percent, and 20 percent, the VA first combines the 60 percent and 40 percent ratings, which the published table sets at 76 percent, not 100 percent. That 76 percent is then combined with the remaining 20 percent condition, and the running total is rounded only at the very end, to the nearest 10 percent.
The Five Steps
1. List every service-connected disability and its individual percentage rating. 2. Arrange the list from the highest rated condition to the lowest. 3. Apply the bilateral factor first if any paired-extremity conditions are present. 4. Combine the two highest ratings using the formula: Combined = 100% minus [(100% minus Rating 1) multiplied by (100% minus Rating 2)]. 5. Continue combining the running total with each remaining condition in order, then round the final figure to the nearest 10 percent.
Using the VA.gov Combined Rating Tool
Veterans do not have to run this formula by hand. VA.gov and the VA's own rating specialists use the published Combined Ratings Table to look up each combination directly, and several accredited veteran service organizations offer combined-rating calculators built on the same 38 CFR § 4.25 table. Running the numbers independently before a rating decision arrives gives a veteran a benchmark to compare against what the VA ultimately issues.
After the Rating Decision: Verifying VA Math, TDIU, and Appeals
Once a rating decision letter arrives, the individual percentage for each condition and the final combined percentage should both be checked against the Combined Ratings Table. The 2026 VA compensation rate table, updated with a 2.8 percent cost-of-living adjustment effective December 1, 2025, pays a veteran with no dependents anywhere from $180.42 per month at a 10 percent combined rating up to $3,938.58 per month at a 100 percent combined rating, so an error in the combined math has a direct and lasting effect on monthly income.
TDIU When the Combined Rating Falls Short of 100 Percent
Veterans whose service-connected conditions prevent them from maintaining substantially gainful employment may qualify for Total Disability based on Individual Unemployability, which pays at the 100 percent rate even when the combined schedular rating is lower. TDIU has its own eligibility rules, generally requiring one condition rated at least 60 percent or a combined rating of at least 70 percent with one condition at 40 percent or more, and it is evaluated separately from the standard combined-rating table.
Filing a Supplemental Claim or Higher-Level Review
If the math on a decision letter does not match the published Combined Ratings Table, or if new evidence would change an individual condition's rating and therefore the combined result, a veteran can file a Higher-Level Review to have the existing evidence reconsidered, or a Supplemental Claim to submit new and relevant evidence. Both routes are formal appeal options and should be filed within the timeframes noted on the decision letter to help preserve the original effective date.
Combined-rating math is one of the most misunderstood parts of the VA disability system, and a small error compounds across every future cost-of-living adjustment. The Free VA Claim Readiness Test at avoyvet.com walks veterans through their current conditions and evidence gaps in a few minutes, at no cost, and points to the specific educational resources that apply to their situation. Veterans preparing to file a new claim or add a condition to an existing rating can use the test as a starting checkpoint before submitting anything to the VA.
Frequently Asked Questions
Why doesn't the VA just add my disability percentages together?
The VA treats disability as a measure of remaining whole-person efficiency rather than a simple stack of separate injuries. A veteran rated 60 percent disabled by one condition is considered to retain 40 percent of their overall efficiency. A second disability is then measured against that remaining 40 percent, not against the original 100 percent baseline. This approach is written into 38 CFR § 4.25 and is why two conditions of 60 percent and 30 percent combine to less than 90 percent. The logic prevents ratings from mathematically exceeding 100 percent no matter how many conditions a veteran accumulates over time.
What is the bilateral factor and when does it apply?
The bilateral factor, found in 38 CFR § 4.26, adds a 10 percent bonus when a veteran has service-connected disabilities affecting paired body parts, such as both knees, both shoulders, or one arm and one leg. The VA combines the two paired-limb ratings first, then adds 10 percent of that combined value before folding the result into the rest of the veteran's combined rating. Veterans with bilateral joint or limb conditions should confirm this factor appears in their rating decision, since it is a common point where a manual calculation can be missed.
Does the order I list my conditions on my claim change my final rating?
No. The final combined rating is the same regardless of the order conditions are listed on VA Form 21-526EZ. The Combined Ratings Table itself is applied by arranging ratings from highest to lowest for calculation purposes, but this is a mathematical convention, not a strategic choice a veteran makes on the application. What does change the outcome is the strength of the evidence supporting each individual condition, since a higher individual rating on any condition improves the combined total more than any filing order would.
How does TDIU relate to my combined rating?
Total Disability based on Individual Unemployability (TDIU) pays compensation at the 100 percent rate for veterans who cannot maintain substantially gainful employment because of service-connected conditions, even when their combined schedular rating is below 100 percent. TDIU generally requires one condition rated at least 60 percent, or a combined rating of at least 70 percent with at least one condition rated 40 percent or higher. TDIU is evaluated as a separate benefit determination on top of the standard combined-rating calculation, not as a replacement for it.
What should I do if my rating decision doesn't match the Combined Ratings Table?
Veterans can compare their listed individual ratings against the published Combined Ratings Table in 38 CFR § 4.25 to check the VA's math. If the final combined percentage does not match what the table produces for those same individual ratings, a veteran can file a Higher-Level Review to request a fresh look at the existing evidence and decision, or a Supplemental Claim if new and relevant evidence is available. Filing promptly after the decision date helps preserve the original effective date tied to the claim.
Can my combined rating ever reach exactly 100 percent?
Yes, though it takes either one condition independently rated at 100 percent, or enough combined conditions that the running combined total rounds up to 100 percent. Because the formula in 38 CFR § 4.25 approaches 100 percent without simple addition, veterans with several lower-percentage conditions may find their combined total lands well below 100 percent even with four or five rated disabilities. This is also why TDIU exists, giving veterans who function at 100 percent disabled in practice, but whose schedular math falls short, a separate path to the same compensation rate.
Where can I verify the current VA compensation rates for my combined rating?
The VA publishes current compensation rate tables directly on VA.gov, broken out by combined percentage and number of dependents. Rates are adjusted periodically with cost-of-living increases, most recently a 2.8 percent adjustment effective December 1, 2025. Because rates and dependent add-ons change, veterans should confirm the exact current-year monthly amount for their combined percentage and dependent status directly on VA.gov rather than relying on a prior year's chart.
Educational information only — not legal, medical, or claim representation, and not affiliated with the U.S. Department of Veterans Affairs. For help filing or appealing, contact a VA-accredited VSO (often free), claims agent, or attorney. For current rates, forms, and deadlines, see VA.gov.
