The Short Answer
Your PIP award letter states the arrears, the period they cover and the rate for each component, in a section that usually follows the award decision. The two figures worth checking first are the date the award starts and the rate applied to each part of the backdated period. A start date recorded as the decision date rather than the claim date is the most common cause of a short payment, and it is corrected by a request rather than an appeal.
What the Award Letter Contains
Five things, in a broadly fixed order. The letter is written to explain a decision rather than to present a payment, which is why the back payment figure sits in the middle rather than at the top.
| Section | What it tells you |
|---|---|
| The decision | Which components you are awarded and at which rate |
| The award period | The date the award starts and the date it ends or is reviewed |
| The points | The descriptors chosen for each activity, and the score |
| The arrears | The period covered, the rate applied and the total owed |
| Ongoing payments | The date of your first regular payment and the weekday thereafter |
Last checked: 7 August 2026
GOV.UK describes the decision letter as telling you "the date of your first payment", "what day of the week you'll usually be paid", "how long you'll get PIP for" and "when and if your claim will be reviewed". The lump-sum figure sits alongside those, and the whole of pip back payment is derived from the dates in this letter.
Reading the Arrears Section
It states a period, a rate and a total, and the total is the product of the first two. At the 2026/27 enhanced daily living rate of £114.60 a week, a 30-week backdated period is £3,438. Where the backdated period crosses an April, the section normally splits into segments, each at the rate in force at the time. A three-year window can therefore show three or four lines rather than one.
Two labels cause confusion. The back payment is often described as a "one-off payment" or a "payment of arrears" rather than as back pay, which is the term claimants use rather than the term the letter uses. And the total shown is the gross figure owed; where an existing award was already in payment for part of the period, the letter shows the difference rather than the full rate.
The Two Dates That Decide the Amount
The date the award starts, and the date the arrears run from. The DWP recorded a median end-to-end clearance time of 20 weeks for new claims at January 2026, so a correctly dated letter normally shows roughly that many weeks of back payment. They are normally the same date, and both should be the date of your claim, or the date the entitlement arose where the award follows a review, a reconsideration or a tribunal.
A letter showing an award start date equal to the decision date is worth querying immediately. That single field converts months of back pay into none, and it is a correction rather than a dispute about the award itself.
When the Figures Do Not Match Your Bank
Compare each transfer separately, because the arrears and the first regular payment are separate. GOV.UK states that the decision letter gives "the date of your first payment" and "what day of the week you'll usually be paid", and the back payment sits outside that cycle. It normally arrives first, sometimes before the letter itself, and the first 4-weekly payment follows on the date the letter sets.
A single deposit that matches neither figure is usually the two combined, or the lump sum net of an existing award already paid for part of the period. The PIP enquiry line on 0800 121 4433 (Monday to Friday, 9am to 5pm) can confirm what was issued, when and to which account.
Last checked: 7 August 2026
If the Award Itself Is Wrong
The letter starts a one-month clock, and the clock covers the award, not just the arithmetic. A late mandatory reconsideration can be accepted up to 13 months where reasons are given, but acceptance is not automatic. Where the components or rates are wrong rather than the dates, the route is a mandatory reconsideration, requested within one month of the date on the letter.
The points section is the part to read before deciding. It names the descriptor chosen for each activity, which shows exactly where the decision differs from your account. What each part of that section means is set out on the Your PIP Decision Letter page, which covers refusals and partial awards as well as back pay.
Keep the letter. It is the document every later stage refers back to, and a replacement takes a phone call and several days.
Work Out Your Number
Checking the letter against an independent figure takes a minute and settles most queries. Put the claim date, the decision date and the award into the back pay calculator, and compare the result with the figure in the letter.