PIP Reliability Criteria and the Majority of Days Rule Explained

Two rules decide most PIP claims — and most applicants don't understand either one

The PIP scoring system hinges on two statutory tests that sit underneath the 12 activities and their descriptors. The reliability test determines which descriptor applies to you, and the majority-of-days rule determines whether it counts. Together they decide whether a fluctuating condition scores points or scores nothing.

If you have a condition that varies from day to day — chronic pain, ME/CFS, fibromyalgia, MS, anxiety, depression, bipolar disorder, Crohn's disease, or anything else that gives you good days and bad days — these two rules are the foundation of your entire claim.

The reliability test (Regulation 4(2A))

The DWP doesn't just ask "can you do this activity?" It asks whether you can do it reliably. That means all four of these criteria must be met:

1. Safely — without risking harm to yourself or anyone else. If you've dropped a boiling pan, fallen in the shower, burned yourself ironing, or wandered into traffic, you're not completing the activity safely.

2. To an acceptable standard — with an adequate outcome. If you can dress yourself but put clothes on inside-out, miss buttons, or wear inappropriate clothing because you can't process the choice, the standard isn't acceptable.

3. Repeatedly — as many times as you'd reasonably need to throughout the day. If you can cook one meal but are too exhausted to prepare anything else for the rest of the day, you can't do it repeatedly.

4. Within a reasonable time — no more than twice as long as someone without your condition. If it takes you 40 minutes to get dressed when most people take 10, you're outside reasonable time.

Each descriptor applies only if you can complete the activity in the way it describes safely, to an acceptable standard, repeatedly, and within a reasonable time. You do not need to fail all four reliability criteria.

The majority-of-days rule (Regulation 7)

Regulation 7 selects the descriptor most often satisfied over the required period, which covers the three months before the prescribed date and the nine months after it. A descriptor met on more than 50% of the days applies; if two or more each meet that test, the highest-scoring applies.

This is not "most days" in a vague sense — it's a strict mathematical test. More than half the days. If you have four bad days and three good days in an average week, you meet the rule. If you have three bad days and four good days, you don't.

If no descriptor applies on more than 50% of days, but two or more non-zero descriptors together apply on more than 50%, the decision maker uses the descriptor met on the greatest proportion of days. If two descriptors apply for the same proportion, the one with the higher point score is used.

Practical examples

Chronic pain (e.g. fibromyalgia): On five days out of seven, morning stiffness and pain mean you can't grip kitchen equipment safely. On two days, the pain is manageable enough to heat a ready meal. Five out of seven exceeds 50%, so the descriptor matching the difficulty applies on the majority of days.

Fluctuating mental health (e.g. anxiety and depression): On four days a week, anxiety is severe enough that you cannot leave the house or plan a journey to an unfamiliar place. On three days, you can manage familiar routes with effort. Four out of seven exceeds 50% — the limitation on Activity 11 (Planning and following journeys) applies.

ME/CFS with post-exertional malaise: You might manage to cook on Monday but spend Tuesday and Wednesday in bed recovering. The recovery days count as days when you cannot prepare food reliably — the crash is a direct consequence of attempting the activity.

How to present fluctuating conditions on the PIP2

The biggest mistake is describing only your worst day or only your average day. The PIP2 needs both:

• How many days per week you experience the limitation
• What happens on those days (specific, concrete details)
• What a better day looks like
• Whether good days trigger a crash afterwards

A 2–4 week symptom diary is the strongest supporting evidence for fluctuating conditions. Record each day: what you attempted, what went wrong, what help you needed, how you felt afterwards. This gives the decision maker (and any future tribunal) a real picture of your 50%-plus pattern.

Get structured tools for the reliability criteria

The PIP Claim Guide for England and Wales includes drafting prompts that walk you through the reliability test for each of the 12 activities, plus a symptom diary framework designed to capture the majority-of-days pattern. It's built specifically for conditions that fluctuate.

See more England and Wales guides →