How to write effective evidence for a work capability assessment (WCA)

A guide for doctors, medical staff, social workers, and other professionals. It explains how to write effective evidence for ESA or Universal Credit’s health element so that your patient gets the right support.

This information applies in England, Wales, Scotland, and Northern Ireland.

Last updated: May 2026

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Key requirements

Entitlement to ESA or Universal Credit on the basis of being unable to work is decided by the difficulties experienced and help needed with very specific tasks - not a diagnosis. This includes help they need but do not get, or help they give themselves - like taking a rest, or using an appliance.
The legal test is can they do a task
●    safely (without it causing pain, breathlessness or discomfort)
●    to an acceptable standard, and
●    in a reasonable time.
Entitlement is based on whether they have these difficulties more than 50% of the time.
The best evidence explains which specific work capability assessment descriptors the claimant meets (listed and explained below).

Why take the time to provide effective evidence?

Evidence from medical staff and other professionals helps the DWP or the tribunal to come to the right decision.
Making sure your patient/client has effective evidence helps them to avoid the cycle of poverty associated with not getting the correct amount of benefit.
Providing useful and detailed evidence reduces the likelihood of repeated requests, saving you time in the long run.

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How to write effective evidence for a work capability assessment (WCA)

Key requirements

Why take the time to provide effective evidence?

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