Combined VA Rating Calculator: How Multiple Conditions Stack

Got a 50% for PTSD and 30% for your back? You might think that adds up to 80% — but the VA sees it differently.

Let’s unpack how combined ratings really work.

🧠 The Math (Quick Version)

VA math starts with your highest condition and calculates every next rating as a percentage of what’s left.

Example:

• Start at 100%
• PTSD: 50% → now you’re 50% “whole”
• Back: 30% of 50% = 15%
• Total = 65% → rounds to 70%

📉 Why It Can Feel Discouraging

This system:

• Makes it harder to reach 100%
• Creates the “90% trap” many vets get stuck in
• Leads to surprise ratings that seem “lower than expected”

But once you understand it, you can ensure your medical documentation accurately reflects your clinical history.

🧩 Documentation Tip

If your clinical findings are not fully reflected in your combined rating:

• Consider clinical links for secondary conditions based on medical judgment
• Ensure your medical evaluations document functional limitations in detail
• Obtain independent medical evaluations to capture the full scope of your symptoms

➕ Want to see your rating combo play out?

Use our VA calculator here

*This article was reviewed and updated for compliance on February 17, 2026.

*This article was reviewed and updated for compliance on February 17, 2026.