VA Disability Rating Calculator
with Diagnostic Codes, Bilateral Factor & SMC

The VA uses the "whole person" method — not simple addition. Each rating is applied to your remaining able-bodied percentage. For example: a 70% rating leaves 30% remaining. A second 30% rating is applied to that 30%, adding 9% more disability. Combined: 79%, rounded to 80%. That's why 70% + 30% ≠ 100%.

Per 38 CFR §4.68, when a veteran has service-connected disabilities affecting both arms, both legs, or paired skeletal muscles, the VA adds a 10% bonus to the combined value of those bilateral ratings before plugging them into the whole-person formula. Example: Left knee 20% + Right knee 20% = combined 36%, then ×1.10 = 39.6% bilateral group, which then combines with other ratings.

A 0% rating means the VA officially recognized your condition as service-connected, but it's not currently severe enough for compensation. It IS worth having — it establishes service connection permanently, making future rating increases much easier. When your condition worsens, you file for an increase (not a new claim). Veterans with 0% ratings win increases far more often than those without any established connection.

IU (also called TDIU — Total Disability Individual Unemployability) pays you at the 100% rate even if your combined rating is lower. To qualify, your service-connected disabilities must prevent substantially gainful employment AND you need: a single disability rated at 60%+ OR a combined rating of 70%+ with at least one disability rated at 40%+. File VA Form 21-8940 through an accredited VSO.

SMC is additional tax-free monthly compensation for veterans with severe disabilities beyond the standard rating schedule. It ranges from SMC-K (+$130.94/mo for loss of creative organ or specific anatomical losses) all the way to SMC-R2/T (~$10,257/mo for veterans requiring the highest level of daily care). Many veterans who qualify for SMC don't know it — always consult an accredited VSO to review your eligibility.

VA Diagnostic Codes (DC) are 4-digit numbers from 38 CFR Part 4 that correspond to specific medical conditions. Each code has a rating schedule defining what symptoms correspond to 0%, 10%, 20% etc. Knowing your DC lets you understand exactly what evidence and symptoms are needed to achieve a higher rating — and helps you prepare for Compensation & Pension (C&P) exams more effectively.

Permanent & Total (P&T) designation at 100% unlocks: completely free VA healthcare and prescriptions, CHAMPVA healthcare coverage for your spouse and dependents, DEA or Fry Scholarship free college for children, property tax exemptions in most states (some fully exempt), no future re-examination (rating is permanent), commissary and exchange access, and Chapter 35 vocational rehabilitation for dependents.