Many conditions, mental health problems, chronic pain, fatigue, arthritis, MS, epilepsy, change from day to day. PIP has a specific rule for this. It does not score you on your best day or your worst day, but on how you are over time: if a difficulty affects you on more than half of your days, it is treated as applying. This is often called the '50% rule'.
Key points
✓PIP scores how you are over time, not a single good or bad day.
✓A descriptor applies if it would be met on more than 50% of your days (regulation 7).
✓The period looked at is about 12 months: the 3 months up to the date that counts for your claim and the 9 months after it (regulation 7).
✓If no single descriptor hits 50% but two or more together do, the one affecting the most days applies.
✓Keep a diary of bad days and state, for each activity, how many days a week the difficulty applies.
The 50% rule, in plain terms
Regulation 7 of the PIP Regulations 2013 says that where a description of a difficulty (a “descriptor”) is met on more than 50% of the days in the period being looked at, that descriptor applies. A day “counts” if it is likely that, had you been assessed on that day, you would have met the descriptor. So you are not asked to prove what happened on one particular date, you are asked what is likely to be true across your days.
This works alongside the reliability test: a day is a “bad day” for an activity if you could not do it safely, to an acceptable standard, repeatedly and in a reasonable time on that day.
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The “more than 50% of days” test is not measured over a single week. Regulation 7 counts the days of the required period, which looks across roughly a year:
✓Yes: The 3 months ending with the date that counts for your claim, usually the date you claimed (the past part), and
✓Yes: The 9 months after that date (the future part)
Added together that is about 12 months. The question is therefore: across that year, are you likely to have this difficulty on more than half your days? That is why a fair, typical picture of your year matters far more than how you happen to feel on the day of the assessment.
When your difficulty changes in degree, not just on or off
Conditions do not just switch between “fine” and “can't do it”. Regulation 7 deals with the in-between:
✓Yes: If two or more descriptors in the same activity are each met on over 50% of days, you get the one that scores the most points
✓Yes: If no single descriptor reaches 50% on its own, but two or more (that score points) together apply on over 50% of days, you get the descriptor that applies on the most days
✓Yes: If they apply on an equal number of days, you get the higher-scoring one
In practice this means a claim where, say, you need help preparing food on some days and supervision on others should still score, as long as a points-scoring difficulty applies on more than half your days overall. Spell out the mix; do not let it be rounded down to your best version.
How to put the 50% rule to work
The DWP cannot count your bad days if you do not describe them. For every activity that varies:
✓Yes: Say how many days a week (or month) the difficulty applies, for example 'most weeks, on 4 or 5 out of every 7, I cannot...'
✓Yes: Describe a typical bad day and what you cannot do reliably on it
✓Yes: Explain the after-effects: the law looks at whether you can do an activity safely during and after it, so say if doing something leaves you unable to manage the next day
✓Yes: Keep a short diary noting the date, what you couldn't do, and how long the episode lasted
Avoid answers like “it depends” or “some days are better than others” on their own. They are true, but they give the assessor nothing to count. Always attach a proportion: “more days than not”, “about 4 in every 7”, “most of the month”.
Good days, bad days and the assessment
A common trap is the assessor noting how you present on the day. If you happen to attend on a better day, or you push through because it is important, that single snapshot is not supposed to decide your claim, the 50% rule looks at your year, not one appointment. If a report scored you on a single good day and ignored your typical pattern, that is a ground of challenge.
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Frequently asked questions
What is the PIP 50% rule?
It is the rule in regulation 7 of the PIP Regulations 2013 that a difficulty (descriptor) is treated as applying to you if it would be met on more than 50% of your days. So a problem that affects you on more days than not counts, even if you have some good days.
Over what period is the 50% rule measured?
Across about 12 months. Under regulation 7 the test looks at the 3 months ending with the date that counts for your claim (usually the date you claimed) and the 9 months after it. The question is whether, over that period, the difficulty is likely to affect you on more than half your days.
My condition varies, which descriptor do I get?
If one descriptor is met on over half your days, you get that one. If two or more are each met on over half your days, you get the highest-scoring. If none reaches 50% alone but two or more points-scoring descriptors together apply on over 50% of days, you get the one that applies on the most days (or, if equal, the higher-scoring one).
What if I have a good day at my assessment?
The 50% rule means your claim should be judged on your typical year, not a single appointment. Explain that you have good and bad days, give the proportion (for example 'most days I cannot...'), and describe the after-effects. If a report scored you only on how you seemed on the day, that is a ground for a Mandatory Reconsideration.
How do I prove how many bad days I have?
Keep a simple diary noting the date, what you could not do, and how long it lasted. On the form and at the assessment, attach a frequency to every varying activity, for example 'on 4 or 5 out of every 7 I cannot prepare a meal safely'. A statement from someone who helps you, and medical evidence showing your pattern, both support this.
Know Your Rights UK. "PIP and Fluctuating Conditions: The 50% Rule." Know Your Rights UK, https://www.knowyourrightsuk.com/benefits/pip/fluctuating-conditions