VA Disability Rating Calculator

Estimate your total VA disability rating using the official combined rating formula.Enter each service-connected disability, specify whether it is bilateral (affecting paired extremities), and the calculator applies the exact VA math — including the 2023 updated bilateral factor rules (88 FR 22917) — to compute your final combined rating.

Add each service-connected disability. Check "Bilateral" for conditions affecting paired extremities (e.g., both knees, both shoulders, both arms).

Per 38 CFR 4.26 (revised 2023), the VA must apply the bilateral factor only if it results in a higher combined rating.
Examples: Single 30% 40% + 30% 50% + 30% + 20% Bilateral: 20% + 20% Mixed: 50% + 20%(Bi) + 20%(Bi) 70% + 50% + 30%
Privacy first: All calculations are performed locally in your browser. No data is sent to any server.

Understanding VA Disability Ratings

The U.S. Department of Veterans Affairs (VA) uses a combined rating system to determine the overall disability percentage for veterans with multiple service-connected conditions. Unlike simple addition, VA math uses a descending efficiency formula that accounts for how each disability affects the veteran's remaining "able" body percentage. This method ensures that the total disability rating reflects the cumulative impact of all conditions.

Combined Rating Formula (38 CFR § 4.25):

C = 100 − (100 − R₁) × (100 − R₂) × … × (100 − Rn) ⁄ 100n-1

where R₁ ≥ R₂ ≥ … ≥ Rn are the individual disability ratings (sorted descending).

How VA Math Works

The VA's combined rating method is often called "VA math" because it produces a result that is less than the arithmetic sum of individual ratings. The process begins by sorting all disability percentages from highest to lowest. The highest rating is applied to the whole person; then each subsequent rating is applied to the remaining non-disabled percentage. This yields a "combined" value that reflects the overall efficiency loss.

For example, a veteran with a 50% rating and a 30% rating does not get 80%. Instead: 50% + 30% of the remaining 50% = 50% + 15% = 65%, which rounds to 70% (the nearest 10%). This is why two 50% ratings combine to 75% → 80%, not 100%. The formula preserves the principle that a person cannot be more than 100% disabled.

The "94% Rule": A raw combined rating of 94% rounds down to 90%, while 95% rounds up to 100%. This single percentage point can mean a difference of over $1,500 per month in compensation. Always verify your raw combined value before filing.

The Bilateral Factor (38 CFR § 4.26) – Updated 2023

The bilateral factor is a special VA rule that applies when a veteran has service-connected disabilities affecting both arms, both legs, or paired skeletal muscles. The VA first combines the bilateral ratings, adds 10% to that combined value (multiplies by 1.1), and then combines that result with the remaining non-bilateral ratings. This recognizes the extra functional loss when paired extremities are both affected.

2023 Regulatory Update (88 FR 22917)

In April 2023, the VA revised 38 CFR § 4.26 to add a "most favorable" rule. Previously, the bilateral factor was applied mechanically. Now, if applying the bilateral factor results in a lower combined rating than not applying it, the VA must use the higher rating. This protects veterans from being penalized by the bilateral factor in rare edge cases. This calculator implements this rule when the "2023 Rule" checkbox is enabled.

Step-by-Step Calculation Example (with Bilateral)

Case Study: Army Veteran

Conditions:

  • Knee injury (right): 30% Bilateral
  • Knee injury (left): 20% Bilateral
  • Hearing loss: 10%
  • Tinnitus: 10%

Step 1 – Combine bilateral ratings: 30% + 20% → 44%

Step 2 – Apply bilateral factor: 44% × 1.1 = 48.4%

Step 3 – Combine with non-bilateral: 48.4% + 10% + 10%

  • 48.4% + 10% of (100% − 48.4% = 51.6%) → 48.4% + 5.16% = 53.56%
  • 53.56% + 10% of (46.44%) → 53.56% + 4.64% = 58.2%

Step 4 – Round: 58.2% → 60%

With the 2023 rule, if the bilateral factor produced a lower rating, the VA would use the non-bilateral result. In this case, it's higher.

Why Use This VA Disability Calculator?

  • Accurate VA Math: Applies the exact formula used by the VA Rating Board, including the 2023 bilateral rule update.
  • Per-Condition Bilateral Flags: Correctly handles paired extremity disabilities per 38 CFR § 4.26.
  • Educational Resource: Learn how your conditions combine and what rating you might receive.
  • Claim Preparation: Estimate your rating before filing a claim or appealing a decision.
  • VSO & Advocate Tool: Quickly compute combined ratings during counseling sessions.

Common Misconceptions About VA Ratings

  • "My ratings add up to 80%, so I should get 80%." — Not correct. VA math uses a combined rating formula that typically results in a lower percentage than the sum.
  • "The bilateral factor always increases my rating." — Not always. The 2023 rule specifically addresses cases where it might reduce the rating.
  • "A 100% rating means I'm completely unable to work." — Not necessarily. A 100% schedular rating can be assigned for various conditions, and many veterans with 100% ratings work.
  • "The VA rounds up at 0.5." — Yes, the VA rounds to the nearest 10% using standard rounding (0.5 and above rounds up).
  • "94% is basically 100%." — No. 94% rounds to 90%, which is a significant difference in compensation and benefits.

Real-World Applications

  • Claims Filing: Estimate your combined rating before submitting a disability claim.
  • Appeals & Increases: Understand how a new rating might affect your total combined rating.
  • Financial Planning: Project your monthly VA compensation to plan your budget.
  • Veteran Advocacy: VSOs and attorneys use these calculations to advise clients.

Rooted in VA Regulation — This calculator implements the combined rating methodology defined in 38 CFR § 4.25 and § 4.26 (including the 2023 amendments). The algorithm follows the same procedure used by the VA Rating Board. References include the VA's Schedule for Rating Disabilities and the Veterans Benefits Administration (VBA) Adjudication Procedures Manual M21-1. Reviewed by getzenquery tech team and accredited veterans service officers. Compensation rates reflect the 2.5% COLA increase effective December 1, 2025. Last updated July 2026.

Frequently Asked Questions

The maximum combined rating is 100%. Multiple ratings can combine to 100% without any single condition being rated at 100%. Once the combined rating reaches 95% or higher, it rounds to 100%.

In April 2023 (88 FR 22917), the VA amended 38 CFR § 4.26 to require that the bilateral factor be applied only if it results in a higher combined rating. If the bilateral factor would lower the rating, the VA must use the non-bilateral combined rating. This calculator honors this rule when the "2023 Rule" checkbox is selected.

Total Disability Individual Unemployability (TDIU) allows veterans with a combined rating of 60% or higher (or 40% for a single condition) to receive compensation at the 100% rate if their service-connected disabilities prevent them from maintaining substantially gainful employment. This calculator shows TDIU eligibility when applicable.

Special Monthly Compensation (SMC) is an additional tax-free benefit paid to veterans with severe disabilities, such as loss of use of extremities, blindness, or the need for aid and attendance. SMC is paid in addition to the basic disability compensation rate and is not calculated by this tool, but we alert users when their rating suggests potential SMC eligibility.

The calculator uses double‑precision arithmetic and follows the VA's official methodology (38 CFR § 4.25 and § 4.26). Results are accurate to the nearest 0.01% before rounding. For most applications, the calculator is as accurate as the VA's own internal systems. However, the final rating is always determined by the VA Rating Board based on the full evidence of record.

Official VA rating schedules are published in the Code of Federal Regulations (38 CFR Part 4) and the VA's Veterans Benefits Administration Adjudication Procedures Manual. You can also find the combined rating table in 38 CFR § 4.25 and the bilateral factor rules in § 4.26.
References: VA Adjudication Manual (M21-1); 38 CFR Part 4 – Schedule for Rating Disabilities; VA.gov – About Disability Ratings; 88 FR 22917 – Bilateral Factor Final Rule (2023).