VA Disability Ratings Explained: What Every Veteran Should Know About Combined Ratings

Navigating the VA disability ratings system can feel overwhelming, but understanding how your ratings work is crucial for getting the benefits you've earned. Augustus Miles helps veterans understand this complex system every day. Proper knowledge of combined ratings can mean the difference between fair compensation and leaving money on the table — and our VA-accredited attorneys have seen this play out in real claims.

VA disability ratings determine your monthly tax-free compensation, and the system uses a unique mathematical formula that often surprises veterans. Whether you're filing your first claim or appealing an existing rating, knowing how combined ratings work empowers you to advocate for the benefits you deserve.

Understanding VA Disability Ratings: The Foundation

The VA rates disabilities on a scale from 0% to 100%, but these aren't simple percentages. Each rating represents the degree to which your service-connected condition affects your ability to work and function in daily life. According to 38 CFR 4.1, the VA uses this rating system to provide fair compensation based on the average impairment in earning capacity.

Here's what each rating level generally means:

0% Rating: The condition is service-connected but doesn't significantly impact your daily functioning
10-20% Ratings: Mild symptoms that occasionally interfere with work or daily activities
30-50% Ratings: Moderate symptoms that regularly affect your ability to function
60-90% Ratings: Severe symptoms that substantially limit your capacity for work and daily life

Note that not every condition uses every 10% step. Mental health conditions under 38 CFR § 4.130, for example, are rated only at 0%, 10%, 30%, 50%, 70%, or 100% — there is no 20%, 40%, 60%, 80%, or 90% for PTSD, depression, or anxiety.

100% Rating: Total disability as measured by the VA's rating schedule, reflecting the most severe level of impairment in earning capacity

Your monthly compensation increases with higher ratings, and all VA disability benefits are completely tax-free. This means a 100% rating provides significant financial security without any tax burden.

How Combined VA Disability Ratings Actually Work

Many veterans assume that multiple disability ratings simply add together — if you have a 30% rating and a 20% rating, you might expect a 50% combined rating. However, the VA uses a different approach called the "whole person theory."

Under 38 CFR 4.25, the VA considers you as a "whole person" and calculates how each additional disability affects the remaining efficiency you have left. This means your ratings don't add up linearly.

The VA's Combined Ratings Formula

The VA combines ratings using this process:

Start with your highest rating — this becomes your base
Calculate the remaining efficiency — subtract your base rating from 100%
Apply the next highest rating to the remaining efficiency
Round to the nearest 10% for your final combined rating

For example, if you have ratings of 50%, 30%, and 20%:

Start with 50% (your base rating)
Remaining efficiency: 100% - 50% = 50%
Apply 30% to the remaining 50%: 30% × 50% = 15%
New combined rating: 50% + 15% = 65%
Apply 20% to remaining efficiency (35%): 20% × 35% = 7%
Final combined rating: 65% + 7% = 72%
Rounded to the nearest 10% — because 72% ends in 2 (less than 5), it rounds down to 70% combined rating. (Note: under § 4.25, values ending in exactly 5 — such as 75% — round up to the next 10%, so 75% would become 80%.)

Why the VA Uses This System Instead of Simple Addition

The combined ratings system reflects a medical reality: disabilities don't affect you in isolation. If you're already 50% disabled, an additional condition can't make you 50% more disabled on top of that — it affects the remaining 50% of your capacity.

This system, while sometimes frustrating for veterans, is designed to provide fair compensation based on your total level of impairment. At Augustus Miles, our VA-accredited attorneys help veterans understand how this system applies to their specific situations and spot conditions or rating gaps that may be holding the overall rating below where it should be.

Common Combined Rating Scenarios Veterans Face

Multiple Physical Conditions

Veterans often develop multiple musculoskeletal conditions. For instance, you might have:

Lower back condition: 40%
Right knee condition: 20%
Left shoulder condition: 10%

Using the combined ratings formula:

Base: 40%
Remaining efficiency: 60%
Apply 20%: 20% × 60% = 12%
New total: 40% + 12% = 52%
Remaining efficiency: 48%
Apply 10%: 10% × 48% = 4.8%
Final: 52% + 4.8% = 56.8%
Rounded result: 60% combined rating

Mental Health and Physical Conditions Combined

Many veterans have both physical injuries and mental health conditions like PTSD. The VA combines these using the same formula, regardless of whether conditions are physical or mental.

If you have:

PTSD: 70%
Tinnitus: 10%
Knee injury: 20%

The calculation would be:

Base: 70%
Apply 20% to remaining 30%: 6%
New total: 76%
Apply 10% to remaining 24%: 2.4%
Final combined rating: 78.4%, rounded to 80%

The Importance of Individual Unemployability (IU)

Sometimes your combined rating doesn't reflect your true inability to work. Individual Unemployability (IU) allows veterans to receive compensation at the 100% rate even with a combined rating below 100% if they can't maintain substantial gainful employment due to service-connected conditions. Two additional points veterans often miss:

SMC-S (Housebound) eligibility: SMC-S (Housebound) eligibility: Veterans at 100% — whether through a single schedular rating or TDIU based on a single condition — may qualify for Special Monthly Compensation at the housebound rate (SMC-S) under 38 CFR § 3.350(i) if they also have additional service-connected conditions independently rated at 60% or higher involving different anatomical segments or bodily systems. SMC-S replaces the standard 100% rate with a higher monthly payment rather than adding on top of it — the difference is meaningful but not a separate stacked amount.
The single-disability rule: A combined 100% rating built from multiple smaller ratings does NOT satisfy the single-disability requirement for SMC-S — the 100% must rest on one condition standing alone.

To qualify for schedular IU under 38 CFR § 4.16(a), you generally need:

One condition rated at 60% or higher, OR
Multiple conditions with one at 40% or higher and a combined rating of 70% or higher

Under § 4.16(a), the VA treats several combinations as one disability for threshold purposes — including disabilities of one or both upper or lower extremities (including the bilateral factor), disabilities from common etiology or a single accident, disabilities affecting a single body system (such as orthopedic, respiratory, cardiovascular-renal, or neuropsychiatric), multiple injuries incurred in action, and multiple disabilities incurred as a prisoner of war. This grouping rule can help borderline cases meet the threshold even when no individual rating reaches the 60% or 40% anchor.

Even if you don't meet these thresholds, the VA can refer your case for extraschedular TDIU under § 4.16(b) when the evidence shows you still can't work due to service-connected conditions.

IU can be the difference between struggling financially and having the security you need. A lot of veterans don't know this benefit exists. At Augustus Miles, we look at every angle of your claim — including IU — to make sure nothing that should be on the table gets missed.

How to Maximize Your Combined Rating

File Claims for All Service-Connected Conditions

Many veterans leave benefits on the table by not filing for all their service-connected conditions. Even a 10% rating for tinnitus or a skin condition can push your combined rating to the next 10% threshold, significantly increasing your monthly compensation.

Understand Secondary Conditions

Secondary conditions, established under 38 CFR § 3.310, are disabilities caused or aggravated by your already service-connected conditions. For example:

Back injury leading to hip problems
PTSD causing sleep disorders
Knee injury causing gait changes that affect your other leg

Secondary conditions count toward your combined rating and can substantially increase your total compensation. Augustus Miles regularly identifies secondary conditions that veterans haven't yet claimed — these are often among the most impactful additions to a combined rating.

Keep Detailed Medical Records

The VA bases ratings on medical evidence. Consistent treatment, detailed symptom documentation, and regular medical evaluations strengthen your claims and support higher ratings.

Consider Increases for Worsening Conditions

If your service-connected conditions have worsened since your initial rating, you can file for an increase. Many veterans accept their initial ratings without realizing they can seek increases as their conditions progress.

Common Mistakes That Hurt Combined Ratings

Not Filing for Obviously Connected Conditions

Some veterans think minor conditions aren't worth claiming, but these "minor" ratings can push you to the next 10% threshold. A 10% increase in combined rating can mean hundreds more dollars monthly — completely tax-free.

Accepting Low Initial Ratings Without Appeal

The VA sometimes assigns lower ratings than the evidence supports. If your rating doesn't match the severity of your symptoms, you have the right to appeal. The appeals process can be complex, but it's often worth pursuing fair compensation.

Not Understanding Bilateral Factor

If you have conditions affecting paired extremities — like degenerative joint disease in both knees, or even different conditions in each leg such as a knee injury on one side and an ankle condition on the other — the VA applies a bilateral factor under 38 CFR § 4.26 that can increase your combined rating. Many veterans miss this additional benefit.

When to Seek Help with VA Disability Ratings

The VA disability system is complex, and small mistakes can cost you thousands of dollars in benefits over time. Consider getting help if:

Your combined rating seems lower than expected
You have conditions you haven't claimed
Your symptoms have worsened since your last rating
You're struggling to work due to service-connected conditions
You've been denied benefits you believe you deserve

At Augustus Miles, our VA-accredited attorneys work with veterans every day to navigate these complexities, backed by a support team — including veterans who've been through this process themselves — who understand exactly what you're going through.

The Financial Impact of Combined Ratings

Understanding combined ratings isn't just academic — it directly affects your financial security. The difference between a 60% and 70% combined rating can mean hundreds of dollars more per month, completely tax-free. Over a lifetime, proper ratings can mean tens of thousands of additional dollars in compensation.

For veterans with families, higher ratings also mean additional compensation for dependents. A 30% or higher combined rating makes you eligible for additional payments for your spouse, children, and dependent parents — meaning parents who are actually dependent on you for financial support, as defined under 38 CFR § 3.250. These additional payments can provide crucial financial support for your family.

Your Next Steps

Remember that VA disability compensation is tax-free income you've earned through your military service. These aren't handouts — they're compensation for sacrifices you made serving our country. You deserve fair ratings that reflect the true impact of your service-connected conditions.

And before you file, consider submitting an Intent to File (ITF) under 38 CFR § 3.155(b) — it can preserve your effective date up to one year before your formal claim, which may mean months of additional back pay. If you're still on active duty, the Benefits Delivery at Discharge (BDD) program lets you file 180–90 days before separation so your claim can be processed before you leave service. Augustus Miles routinely helps veterans lock in ITF dates before a full claim is ready. But the ITF only holds that date if you follow up with a complete claim within one year per § 3.155(b); if you don't, the ITF lapses and no effective date is protected.

Get the Help You Deserve

Our VA-accredited attorneys handle VA disability claims every day. We help veterans navigate the combined ratings system, backed by a support team who've been through this process themselves. There's no upfront cost — we work on a contingency basis, capped by federal rule, so fees only apply to past-due benefits if we win additional compensation for you.

Many of our team members are former clients themselves — veterans who went through the same process and came out the other side with the ratings they deserved. We know how frustrating the VA system can be, and we're here to help you work through it. Reach out when you're ready.

Frequently Asked Questions

Does my 0% service-connected rating actually do anything for me?

It doesn't come with monthly compensation, but a 0% rating still matters. Under 38 CFR § 4.31, it's a full grant of service connection — not a denial. That means if the condition worsens, you can file for an increase without re-proving the link to your service. It also opens the door to VA healthcare for that condition and — importantly — can serve as the basis for secondary-condition claims under 38 CFR § 3.310. For example, if a 0%-rated knee condition causes a hip problem over time, that hip condition may be service-connected through the existing 0% rating.

How does the rounding work — does the VA always round up?

Not always. The VA rounds your final combined value to the nearest 10%. Under 38 CFR § 4.25, when the combined value ends in a 5 (the ones digit), the VA rounds up — so 75% becomes 80%, but 74% rounds down to 70%. That's why even a small 10% rating for something like tinnitus can be the difference between rounding up or down — and that one threshold jump can mean a significant bump in monthly compensation.

Can I use the VA's combined ratings table instead of doing the math myself?

Yes. The VA publishes a combined ratings table under 38 CFR 4.25 that lets you look up two ratings at a time and find the combined result. You just work through your ratings from highest to lowest, combining two at a time, until you've included all of them. It saves you from doing the multiplication manually.

What's the bilateral factor and how much does it actually add?

The bilateral factor applies when you have disabilities affecting paired extremities — such as conditions in both knees, both ankles, or both shoulders. The conditions don't have to be the same diagnosis; what matters is that they affect paired limbs. One important requirement: both sides must be rated at a compensable percentage (10% or higher on each side) under § 4.26. If one side is rated 0%, the bilateral factor doesn't apply — that's a common reason veterans miss out on this boost. Note that bilateral hearing loss is rated differently — it's evaluated as a single condition under DC 6100 and the bilateral factor doesn't apply.

Does the order I list my conditions on my claim affect my combined rating?

No. The VA always starts with your highest-rated condition and works down regardless of the order you filed them. The math produces the same result no matter how you arrange the ratings, so you don't need to worry about filing strategy based on order — just make sure every service-connected condition is actually on the claim.