VA Disability Combined Rating Calculator
Stop guessing your VA combined rating.
Enter each service-connected condition to see the official VA whole-person formula applied step by step, with the bilateral factor calculated automatically.
Data current as of January 1, 2026 • Official VA rates effective December 1, 2025 (2.8% COLA)
Enter each condition
See the VA math
Estimate your compensation
Your Disability Ratings
Add a disability
Dependents (affects compensation at 30%+)
Spouse
Children under 18
Children 18–23 in school
Attending an approved school program
Dependent parents
Add at least one disability rating above to see your combined rating.
This calculator estimates:
- Combined VA disability rating using the whole-person formula
- Bilateral factor impact on paired body parts
- 2026 monthly compensation based on rating and dependents
This calculator does not estimate:
- Whether VA will grant service connection for a condition
- The rating VA will assign for a specific medical condition
- Effective dates or back pay amounts
- Special Monthly Compensation (SMC)
- TDIU approval
- VA healthcare priority group or state-level benefits
A small difference near a rounding threshold can move you from 60% to 70%, or from 90% to 100% — this calculator shows the math before you file, appeal, or plan around your expected rating. Always verify estimates with your VA decision letter, C&P exam results, or an accredited VSO.
How Does the VA Rate a Veteran with Back and Bilateral Knee Conditions?
Scenario: Three service-connected conditions — 50% lumbar spine (back), 30% left knee, 20% right knee. The knees trigger the bilateral factor under 38 CFR § 4.26 because both sides of the same joint are rated.
What this means: Without the bilateral factor, these three conditions combine to 72% (100 − (0.50 × 0.70 × 0.80) = 72%), which also rounds to 70% — so in this particular case the rounded result is the same either way. But the bilateral factor matters enormously in cases near a rounding threshold: a combined value of 63% without the factor becomes 67% with it, changing the rounded rating from 60% to 70% and adding hundreds of dollars per month. VA rules require the bilateral adjustment whenever both sides of a paired joint carry compensable ratings. At 70%, this veteran receives $1,808.45/month in tax-free VA disability compensation, and may qualify for additional dependent-based increases if they have a spouse or children.
Does this result look off? Report a calculator issue →
How VA math works
The VA uses a “whole person” theory: you start at 100% healthy, and each disability reduces your remaining capacity. A 50% disability leaves you at 50% healthy. A subsequent 30% disability then reduces that remaining 50% — not the original 100%.
This is why 50% + 30% does not equal 80%. After applying 50%, you have 50% remaining. Applying 30% to that 50% leaves 35% (50 × 0.70 = 35). Combined value: 100 − 35 = 65%, which rounds to 70%.
The VA's position is that you cannot be more than 100% disabled — so each additional condition has diminishing impact the higher your existing combined rating. The final combined value is rounded once to the nearest 10%.
The bilateral factor explained
Under 38 CFR § 4.26, if you have compensable disabilities affecting both sides of a paired body part — both knees, both arms, both legs, both eyes — you receive a 10% bonus on the combined value of those bilateral disabilities.
Example: Left knee 20% + Right knee 10%. Using VA math, these combine to 28%. The bilateral factor adds 10% of 28 (= 2.8), giving 30.8%. That 30.8 is then combined with your other disabilities as if it were a single rating.
The bilateral factor only applies when both sides have a compensable (greater than 0%) rating. A 0% rating on one side does not trigger it. If both sides are affected, review whether each side is separately documented and claimed. An accredited VSO can help confirm how to file bilateral conditions.
Note: Eye ratings can involve separate VA rating rules beyond the standard bilateral factor. If your claim involves paired eye conditions, verify the calculation with an accredited representative.
Key rating thresholds
Service-connected with no monthly compensation. Establishes the condition for VA purposes but does not increase the combined percentage unless later increased.
Flat compensation rate — no dependent additions at these levels
Dependent compensation kicks in (spouse, children, parents)
At 50% or higher, veterans are usually placed in Priority Group 1 for VA healthcare, with reduced or eliminated copays for many types of care. Exact healthcare eligibility, copays, and covered services depend on care type, priority group, and current VA rules.
May qualify for TDIU (see below) if unable to work
Maximum schedular rating — highest compensation tier, P&T status if permanent
Note: Comprehensive VA dental care has separate eligibility rules and is not automatic at 50%.
Common VA math mistakes
✗ Adding ratings together
Ratings are never added. Each is applied to the remaining healthy percentage.
✗ Rounding between steps
Round only once — at the very end, after all ratings have been applied.
✗ Forgetting the bilateral factor
If you have rated disabilities on both sides of a paired body part, the bilateral factor can push you to the next threshold.
✗ Filing only one side of a bilateral condition
If symptoms affect both sides of a paired body part, make sure both sides are documented in your records. Review the filing approach with an accredited VSO or attorney before submitting.
TDIU — Total Disability Based on Individual Unemployability
TDIU allows veterans to receive compensation at the 100% rate even if their combined schedular rating is below 100%, if the disabilities prevent them from maintaining substantially gainful employment.
General eligibility: Combined rating of at least 70% with one disability rated at least 40%, OR a single disability rated at least 60%. The VA may also grant TDIU on an extraschedular basis in exceptional cases.
TDIU requires a separate VA Form 21-8940 (Veteran's Application for Increased Compensation Based on Unemployability). Work with an accredited VSO to file.
Marginal employment and protected work environments can be nuanced — review TDIU questions with an accredited VSO or attorney.
Special Monthly Compensation (SMC)
SMC provides additional compensation above the 100% rate for veterans with specific severe disabilities: loss of use of limbs, blindness, need for regular aid and attendance, housebound status, and others.
SMC calculations are complex and depend heavily on your specific conditions and combination of ratings. This calculator does not compute SMC — if you believe you may qualify, contact an accredited VSO or the VA directly.
Disclaimer
This calculator provides estimates based on the official VA combined rating formula (38 CFR § 4.25–4.26) and 2026 VA compensation rates (effective December 1, 2025, 2.8% COLA). Actual ratings are determined by the VA based on medical evidence, C&P exam findings, and adjudicator review. This tool is not affiliated with the Department of Veterans Affairs or the Department of Defense. Verify all figures with your regional VA office or an accredited VSO or attorney.
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