Their own payment-practices filing · gov.uk
Sellafield Limited pays suppliers in 28 days on average — within its stated 21–30 day terms
Their H1 2026 filing puts the average 7 days past the shortest term they state (21 days), still within their 30-day upper term.
- Their stated terms
- 21–30 days
- Paid outside agreed terms
- 8% of invoices
- Paid after 61+ days
- 3%
- Reporting period
- 1 Oct 2025 – 31 Mar 2026
- Source
- their gov.uk filing, filed 23 Apr 2026
Self-reported figures from their statutory filing. How this is compiled.
Terms vs reality · their H1 2026 filing
Paid within their stated range — 28 against 21–30 days
Where their invoices landed · share of all invoices
The pattern · last 6 of 16 reports
Holding steady around 28 days
The read · computed from their figures
Sellafield Limited's H1 2026 filing puts their average at 28 days against stated terms of 21–30 days; 8% of invoices were paid outside agreed terms and 3% took 61 days or longer. Filed 23 Apr 2026.
The pattern is steady — their reported average moves within about ±2 days period to period.
On the latest reported averages: Faster than 59% of the 115 large companies reporting in other services.
That is 16 statutory periods on record (earliest H2 2018) — a historical record, not a promise for a new invoice.
What they tell their suppliers
In their own words · from the filing
Standard payment terms
Standard payment terms Sellafield currently employs three different payment terms that can be considered as standard, as described below: Net Cash Monthly - Payment is made by the end of the month following the month in which the invoice is dated - this payment term remains in use for contracts / frameworks in place prior to 26/02/2015 – the date upon which the Public Contracts Regulations 2015 came into force. Use of this payment term is diminishing as these legacy contracts / frameworks come to an end. 30 Days from Invoice Validation - Payment is made no later than a period of 30 days from the date on which Sellafield Ltd has determined that the invoice is valid and undisputed. This payment term generally applies to contracts / frameworks placed from 26/02/2015 onwards. 21
Dispute resolution
Sellafield Limited actively seeks to resolve disputes by discussing them with the relevant supplier(s), typically involving contract management teams from both parties. Where agreement cannot be reached at a working level, the dispute will be discussed between senior representatives of the parties. Where it is not possible to reach agreement most contracts will contain a dispute resolution procedure, which details the route for mediation, arbitration and bringing a claim in the courts.
Every statutory report on record
Most recent first.
| Period | Avg days | Outside terms | 61+ days | Filed |
|---|---|---|---|---|
| H1 2026 | 28 | 8% | 3% | 23 Apr 2026 |
| H2 2025 | 31 | 3% | 4% | 27 Oct 2025 |
| H1 2025 | 30 | 4% | 3% | 29 Apr 2025 |
| H2 2024 | 29 | 3% | 2% | 28 Oct 2024 |
| H1 2024 | 29 | 4% | 2% | 22 Apr 2024 |
| H2 2023 | 27 | 3% | 2% | 19 Oct 2023 |
| H1 2023 | 29 | 3% | 3% | 24 Apr 2023 |
| H2 2022 | 26 | 4% | 2% | 28 Oct 2022 |
| H1 2022 | 25 | 4% | 1% | 22 Apr 2022 |
| H2 2021 | 17 | 3% | 1% | 21 Oct 2021 |
| H1 2021 | 16 | 3% | 1% | 29 Apr 2021 |
| H2 2020 | 15 | 6% | 3% | 15 Oct 2020 |
| H1 2020 | 29 | 5% | 2% | 29 Apr 2020 |
| H2 2019 | 30 | 5% | 2% | 22 Oct 2019 |
| H1 2019 | 31 | 6% | 2% | 16 Apr 2019 |
| H2 2018 | 31 | 8% | 2% | 24 Oct 2018 |
On the public register · Companies House
Company record
- Status
- Active
- Type
- Private Limited Company
- Incorporated
- 16 Feb 1971
- Registered office
- HINTON HOUSE BIRCHWOOD PARK AVENUE, WARRINGTON, WA3 6GR
Illustrative · working-capital arithmetic
What a 28-day cycle ties up
A worked example, not a finding. On a hypothetical £12k/month account, at a 28-day vs a 21-day payment cycle.
Late Payment Act. The Late Payment of Commercial Debts (Interest) Act 1998 lets a supplier charge statutory interest and fixed compensation on invoices paid past agreed terms. Work out what a late invoice is worth → Whether it applies depends on your contract — check with an adviser.
Quick answers · Sellafield Limited
Are they getting slower or faster?
What's their typical pay point?
Can I see what this means for my invoices?
Stay ahead
Watch Sellafield Limited (free)
Their next payment report is due ≈ 27 Oct 2026. We watch their public record and email you when something changes — a new payment report, late filings, insolvency markers, new charges.
You’ll get a confirmation email first. Unsubscribe any time. How we handle your address.
More large companies in other services
Scottish Society for the Prevention of Cruelty To Animals · Shire Pharmaceutical Contracts Limited · Score (Europe) Limited · Sky Subscribers Services Limited · Redburn (Europe) Limited · Smart DCC Limited
How UK payment reporting works
What is a Payment Practices Report?
What does "paid outside agreed terms" mean?
How often is this data updated?
Is this official government data?
How this is compiled. Built from official records only: Companies House and the gov.uk payment-practices service. The payment figures are self-reported — companies over the size threshold must file them by law and the board signs them off. No credit-agency data. The numbers are theirs; the plain-English read is ours. This is information compiled from public records under the Open Government Licence v3.0 — not a credit rating and not advice.
The 31-day comparison figure is the median across 6,104 companies with a current statutory report — every sector pooled, not an average of sector medians (how the figure is built).
Report PL-01002607 · latest period to 31 Mar 2026
Built by YORXEN LTD · registered in England & Wales · CRN 17303256 · privacy · terms.