Estimate your 2026 combined VA disability rating and monthly tax-free compensation
The VA Combined Rating Calculator helps veterans estimate their combined VA disability rating using the same whole-person formula the Department of Veterans Affairs uses to determine monthly tax-free compensation. Unlike simple addition, VA math prevents any single veteran from being rated more than 100% disabled by treating each subsequent disability as a percentage of the remaining healthy portion of the whole person. For veterans with multiple service-connected disabilities, understanding how the VA combines ratings is critical to evaluating your claim and planning for potential rating increases. A veteran with a 50% rating and a 30% rating does not receive an 80% combined rating — the VA math produces a 65% combined value, which rounds to 70%. This non-intuitive system means that adding a smaller disability produces diminishing returns on the combined percentage. This calculator uses the official 2026 VA compensation rates, which reflect the 2.8% cost-of-living adjustment (COLA) effective December 1, 2025. Rates are published annually by the Department of Veterans Affairs and apply to all veterans receiving service-connected disability compensation. The bilateral factor is an important special rule under 38 CFR § 4.68: when a veteran has service-connected disabilities affecting both paired extremities — both arms or both legs — the VA applies a 10% bonus to the combined value of those paired conditions. This adjustment recognizes that bilateral disabilities impair a veteran more than the standard whole-person formula would indicate. TDIU — Total Disability based on Individual Unemployability — allows the VA to pay veterans at the 100% compensation rate even if their combined rating is below 100%, provided the veteran cannot maintain substantially gainful employment and meets the rating thresholds. This calculator checks whether your disabilities may qualify you for TDIU consideration. All compensation figures in this calculator are for informational purposes only. The actual VA determination involves medical evidence, nexus letters, C&P examination results, and regulatory interpretation. Veterans are encouraged to work with an accredited VA attorney, Veterans Service Officer (VSO), or claims agent when filing or appealing claims.
Understanding VA Combined Ratings
What Is the VA Combined Rating?
The VA combined rating is the official disability percentage assigned to a veteran who has two or more service-connected conditions. Rather than adding individual ratings together — which could theoretically exceed 100% — the VA uses the whole-person theory, treating the human body as representing 100% capacity. The highest-rated disability consumes the largest portion of that capacity, then each subsequent disability takes a percentage of what remains. The result is a combined value that approaches but never exceeds 100%, reflecting the total impact of all service-connected conditions on the veteran's overall health and earning capacity. This combined percentage is then rounded to the nearest 10% to determine the official rating tier, which in turn determines the monthly tax-free compensation amount.
How Is the Combined Rating Calculated?
The VA uses an iterative multiplication formula: start with 100% representing a fully healthy person. Take the highest disability rating and subtract it from 100 to find the remaining whole-person percentage. Then apply each subsequent disability (sorted highest to lowest) as a percentage of the remaining whole-person value, subtracting that contribution each time. The formula is equivalent to: Combined = 100 − [(1 − r1) × (1 − r2) × ... × (1 − rn)] × 100, where each r is the individual rating expressed as a decimal. After computing the unrounded combined value, the bilateral factor is applied if applicable (10% of the combined value for each bilateral pair), and then the result is rounded to the nearest 10% using the standard rounding rule: 1–4 round down, 5–9 round up.
Why Does the Combined Rating Matter?
The combined rating determines the monthly tax-free VA disability compensation a veteran receives — amounts that range from $180.42/month at 10% to $3,938.58/month at 100% for a veteran with no dependents, based on 2026 COLA-adjusted rates. Higher ratings also unlock dependent compensation for spouses, children, and parents. Reaching specific thresholds opens additional benefits: 30% activates dependent compensation, 60% (single disability) or 70% combined (with one disability at 40%) may qualify a veteran for TDIU, and 100% rating opens eligibility for Special Monthly Compensation (SMC), special home adaptation grants, and property tax exemptions in many states.
Limitations of This Calculator
This calculator provides estimates only and is not affiliated with or endorsed by the Department of Veterans Affairs. The bilateral factor implementation uses a simplified approach; the precise regulatory method per 38 CFR § 4.68 involves combining bilateral conditions as a separate group before merging with other disabilities. Compensation rates reflect the officially published 2026 figures but may not capture all edge cases, including Protected Disability Ratings, SMC rates, rates for veterans with very large numbers of dependents, or Dependency and Indemnity Compensation (DIC). The TDIU check is a preliminary eligibility indicator only — actual TDIU determinations require a VA rating decision. Always consult a VSO or accredited VA attorney for claim-specific guidance.
Formulas
How to Use the VA Combined Rating Calculator
Add Your Service-Connected Disabilities
Click 'Add Another Disability' to enter each service-connected condition. Select the condition name from the dropdown, choose its VA rating (10%–100% in 10% increments), and identify the body part if it affects an arm or leg.
Enter Your Dependents
Select your marital status and enter the number of dependent children under 18, school-age children (18–23), and dependent parents. If you are married and your spouse requires Aid and Attendance, toggle that option. Dependent compensation only applies at ratings of 30% or higher.
Indicate Your Work Capacity
Answer whether you can maintain gainful employment. This determines whether you may qualify for TDIU (Total Disability Individual Unemployability), which pays at the 100% rate if you have a single disability rated 60%+ or a combined rating of 70%+ with one disability at 40%+.
Review Your Results
The calculator shows your unrounded combined rating, the final rounded rating, your estimated 2026 monthly (and annual) tax-free compensation, any bilateral factor applied, a TDIU eligibility alert, and a step-by-step VA math breakdown table. Export to CSV or print for your records.
Frequently Asked Questions
Why doesn't the VA just add up all my disability ratings?
The VA uses the 'whole-person theory' to prevent any veteran from being rated over 100% disabled. Each disability is applied to the remaining healthy portion of the person after accounting for prior conditions. So a 50% disability and a 30% disability produce a 65% combined rating, not 80%. The highest-rated condition has the biggest impact; subsequent conditions yield diminishing returns on the combined total. This system reflects the VA's interpretation that a person cannot be more than 100% disabled.
What is the bilateral factor and how does it affect my rating?
The bilateral factor is an adjustment under 38 CFR § 4.68 that applies when a veteran has service-connected disabilities affecting both paired extremities — either both arms or both legs. Because bilateral disabilities impair function more than conditions on a single side, the VA adds a 10% bonus to the combined value of those paired conditions before rounding to the final rating. If you have both left-arm and right-arm conditions, or both left-leg and right-leg conditions, this factor applies automatically. Both bilateral pairs can apply simultaneously, adding up to a 20% combined bonus in those cases.
How does TDIU work and who qualifies?
TDIU (Total Disability based on Individual Unemployability) allows the VA to pay veterans at the 100% disability rate even if their combined rating is below 100%. To qualify, a veteran must be unable to maintain substantially gainful employment due to their service-connected conditions AND meet one of two rating thresholds: a single disability rated at 60% or higher, or a combined rating of 70% or more with at least one disability rated 40% or higher. The 2026 TDIU monthly rate equals the 100% compensation rate — $3,938.58 for a veteran with no dependents. TDIU must be formally applied for through the VA.
Why does my combined rating round to a lower number?
The VA rounds the combined disability value to the nearest 10%. If the last digit of the unrounded percentage is 1 through 4, the VA rounds down to the lower tens value. If it is 5 through 9, the VA rounds up. For example, a 63.4% combined value rounds down to 60%, while a 63.5% value rounds up to 70%. This rounding rule means small increases in the raw combined value can jump the final rating by a full tier — or keep it stuck at the same tier. The rounding visualization in this calculator shows exactly where your raw value falls relative to the threshold.
Are the compensation rates in this calculator current for 2026?
Yes. This calculator uses the official 2026 VA disability compensation rates, which reflect the 2.8% cost-of-living adjustment (COLA) effective December 1, 2025. These rates apply to all veterans receiving service-connected disability compensation starting December 2025. The VA adjusts compensation rates annually based on the Social Security Administration COLA percentage. The 2026 rate for a veteran at 100% with no dependents is $3,938.58 per month, up from $3,831.30 in 2025.
What is Special Monthly Compensation (SMC) and does this calculator include it?
Special Monthly Compensation (SMC) is additional tax-free monthly compensation available to veterans with specific severe disabilities beyond a 100% combined rating — such as loss of use of a limb, loss of sight, loss of hearing, need for regular aid and attendance, or being housebound. SMC is awarded at lettered tiers (SMC-K through SMC-T) and can significantly increase monthly pay above the standard 100% rate. This calculator includes an informational note when you reach a 100% rating to alert you to SMC eligibility, but it does not calculate SMC amounts directly. Contact your VSO or the VA for a full SMC evaluation.