Back conditions are among the most common service-connected disabilities — and one of the few rated mostly by a tape-measure number: how far forward you can bend. Understanding that number tells you what rating to expect.
Rated by forward flexion
The VA uses the General Rating Formula for Diseases and Injuries of the Spine (38 CFR §4.71a, Diagnostic Codes 5235–5243), which covers everything from strains to degenerative disc disease to vertebral fractures. For the lower back (thoracolumbar spine), the main measurement is forward flexion — how many degrees you can bend forward — measured with a goniometer at your C&P exam. Normal thoracolumbar forward flexion is 90°, so the thresholds below describe how much of that you've lost:
| Rating | Thoracolumbar (lower back) criteria |
|---|---|
| 10% | Forward flexion greater than 60° but not more than 85°; or combined range of motion greater than 120° but not more than 235°; or muscle spasm/guarding that doesn't change gait or spinal contour. |
| 20% | Forward flexion greater than 30° but not more than 60°; or combined range of motion of 120° or less; or muscle spasm/guarding severe enough to cause an abnormal gait or spinal contour. |
| 40% | Forward flexion of 30° or less; or favorable ankylosis of the entire thoracolumbar spine. |
| 50% | Unfavorable ankylosis of the entire thoracolumbar spine. |
| 100% | Unfavorable ankylosis of the entire spine. |
(“Ankylosis” means the spine is fixed/fused in position.) Notice how compressed the scale is: the entire distance between a healthy back and one that can only bend a third of the way is the difference between 0% and 40%. That's why the exceptions below — painful motion, incapacitating episodes, and separately rated nerve damage — matter so much in real claims.
The other path: incapacitating episodes (IVDS)
If your diagnosis is intervertebral disc syndrome (IVDS — disc disease with nerve involvement), there's an alternative formula based on incapacitating episodes: periods of bed rest prescribed by a physician. VA rates you under whichever formula — range of motion or episodes — produces the higher result.
| Rating | Incapacitating episodes in the past 12 months |
|---|---|
| 10% | At least 1 week but less than 2 weeks total |
| 20% | At least 2 weeks but less than 4 weeks total |
| 40% | At least 4 weeks but less than 6 weeks total |
| 60% | At least 6 weeks total |
The catch is the word prescribed. Days you spent in bed on your own don't count — only physician-ordered bed rest documented in treatment records. But for veterans whose flexion measures decently on a good exam day while their year is punctuated by doctor-ordered downtime, this path can rate 60% — higher than any range-of-motion rating short of ankylosis.
What it pays in 2026
For a single veteran in 2026: 10% = $180.42, 20% = $356.66, 40% = $795.84, and a 60% IVDS rating = $1,435.02 per month. Back conditions often sit at 10–20% on their own — but they frequently bring secondary ratings that add up, and dependent additions begin once your combined rating reaches 30% (see the 2026 pay chart).
Sciatica is rated separately
This is the part veterans most often miss. Nerve pain radiating down the leg (radiculopathy / sciatica) is not part of the spine rating — it's rated separately under the nerve codes in 38 CFR §4.124a (e.g., the sciatic nerve, DC 8520), usually 10–20% or more per affected leg. So a single back injury can produce a back rating plus a left-leg rating plus a right-leg rating.
Because the legs are paired, bilateral lower-extremity radiculopathy also triggers the bilateral factor — an extra 10% of the combined leg value before everything else is combined.
A worked example: how one back injury becomes 40%
Say your C&P exam shows flexion of 45° (a 20% back rating) plus mild radiculopathy in each leg at 10%. Here's the VA math:
- Bilateral factor first: combine the two 10% leg ratings — 10 + (10% of 90) = 19. Add 10% of that value: 19 + 1.9 = 20.9, which rounds to a single 21 bilateral rating.
- Then combine with the back: order high to low — 21, then 20. Start at 21; the 20% takes 20% of the remaining 79, which is 15.8. That gives 21 + 15.8 = 36.8.
- Round at the end: 36.8 rounds to a 40% combined rating — $795.84 a month in 2026 instead of the $356.66 the back rating pays alone.
That's a difference of $439.18 every month, and it comes entirely from making sure the leg symptoms were claimed and examined — not from the back rating itself changing. Run your own numbers in the calculator.
The C&P exam: what actually gets measured
Spine exams are more mechanical than most, which makes preparation straightforward:
- Don't push through pain silently. The examiner should record where pain begins in the arc of motion, not just how far you can force yourself. Say “it hurts starting here” out loud.
- Repetitive-use testing matters. You'll typically be asked to repeat movements. If your motion decreases or pain increases with repetition, that additional limitation belongs in your rating.
- Describe flare-ups specifically. How often, how long, and how limited you are during one. An exam on a good day is not the whole picture, and VA must consider it.
- Mention leg symptoms. Numbness, tingling, or shooting pain into either leg should be examined and rated as radiculopathy — it won't be rated if it isn't raised.
- Bring the bed-rest record. If a physician prescribed bed rest during the past year, make sure those records are in your file for the IVDS path.
Other common secondaries
Chronic back pain often supports secondary claims for depression or anxiety (the mental-health formula covers these) and sleep problems. Those can carry higher ratings than the back itself — and if the total picture keeps you from working, TDIU can pay at the 100% rate even without a 100% combined rating.
Frequently asked questions
What is the highest VA rating for back pain?
On range of motion alone, 40% (flexion of 30° or less). Going higher on the spine formula requires ankylosis — 50% for unfavorable ankylosis of the entire thoracolumbar spine, 100% for the entire spine. The IVDS episodes path reaches 60%, and radiculopathy ratings combine on top.
Can I get a rating if my range of motion is normal?
Yes. Under §4.59, painful motion supports at least the minimum compensable rating — 10% — even with technically normal measurements. Normal thoracolumbar flexion is 90°.
Is sciatica part of my back rating?
No — radiculopathy is rated separately per affected leg under the nerve codes (e.g., sciatic nerve, DC 8520) and combined with the spine rating. Both legs affected triggers the bilateral factor.
What counts as an incapacitating episode?
Bed rest prescribed by a physician and documented in treatment records. Self-directed rest days don't count, however real they are — which is why asking your doctor to document prescribed bed rest matters.
What if my back is worse during flare-ups?
VA must consider flare-ups and the added limitation from pain, weakness, and fatigue on repetitive use — not just one snapshot measurement. Describe frequency, duration, and how much less you can bend during a flare-up.
What does a 20% back rating pay in 2026?
$356.66 per month for a veteran alone; 40% pays $795.84. Dependent additions start at a combined 30%, so ratings that combine past that line unlock extra pay for a spouse, children, or dependent parents.