VA BENEFITS REFERENCE
How Additional Ratings Change An Existing Combined Rating
An additional assigned evaluation changes the full combined-rating calculation. Recalculate from all individual evaluations in the relevant period, rather than adding the new percentage to the rounded total printed on an older decision.
Build A List For One Effective Period
Start with the individual evaluations in your award history. Keep one entry for each separate evaluation and note when it became effective. If different changes took effect on different dates, there may be more than one period to check.
A combined rating is the result of those entries, not another entry to include. When VA increases a condition from 20% to 30%, use the replacement 30% for the later period. Leaving both percentages in that period treats one evaluation as though it were two separate disabilities.
Recover Information Lost Through Rounding
Consider an illustrative set of 60%, 20%, and 20% evaluations, with no bilateral factor. The first pair produces 68. Combining another 20% produces 74, which finishes at 70%. That whole combined value of 74 is important even though the displayed rating is 70%.
Adding a separately assigned 10% evaluation to that full list produces 76.6, recorded as 77 and rounded to 80%. Starting incorrectly from the rounded 70% gives 73 and rounds back to 70%. This is why a tool needs the original evaluations rather than just the old combined rating.
Sources: [1].
Reorder And Recheck Paired Extremities
The combined table applies evaluations in order of severity. A newly assigned evaluation can belong near the beginning, not necessarily at the end. The calculator should sort the complete list before displaying its combination steps.
A change can also affect a qualifying bilateral group. Adding a compensable evaluation on the opposite arm or leg may create a pair, while a change in an existing extremity evaluation can alter the group's value. The favorable-result exception must be considered with the resulting set. Tag only separately assigned evaluations that actually fit the relevant extremity category.
Separate A Numerical Change From A Payment Change
A different whole combined value can still finish in the same rounded band. That does not mean the newly assigned evaluation disappeared. It means the final combination did not cross the next rounding threshold for that period.
Once the final rating is established, ordinary compensation is a separate lookup using the applicable rate year and eligible household. A rate change can involve its own effective date and payment-start rules. Checking those dates and any money already paid is necessary before treating the difference between two calculator outputs as an amount VA owes.
Continue Reading
- VA Combined Rating Calculator
- Why 90 Plus 10 Doesn't Equal 100 In VA Math
- How VA Combines Multiple Disability Ratings
Frequently Asked Questions
Should I add a new 30% to an existing combined 70%?
Use every individual evaluation behind the 70% and the new assigned evaluation. The rounded total may have lost information that changes the result.
If one condition increased, do I enter both its old and new ratings?
Not for the same period. Replace the old evaluation with the new one from its effective date, then recalculate the relevant period.
Official Sources
Last verified 2026-10-25. Source publication or legal effective dates are shown separately where available.
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