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Their own payment-practices filing · gov.uk

National Grid Interconnectors Limited pays suppliers in 29 days on average — inside its 60-day stated terms

CRN 03385525 · Electricity & gas · 16 statutory reports on record · period to 31 Mar 2026

29daysavg time to pay · H1 2026

Their H1 2026 filing puts the average 31 days inside their stated 60-day term.

Faster than mostvs a 31-day median across 6,104 recent filers
Their stated terms
60 days
Paid outside agreed terms
0% of invoices
Paid after 61+ days
2%
Reporting period
1 Oct 2025 – 31 Mar 2026
Source
their gov.uk filing, filed 30 Apr 2026

Self-reported figures from their statutory filing. How this is compiled.

Terms vs reality · their H1 2026 filing

Paid 31 days inside the 60-day term they state

The pattern · last 6 of 16 reports

Holding steady around 29 days

The read · computed from their figures

National Grid Interconnectors Limited's H1 2026 filing puts their average at 29 days against stated terms of 60 days; 0% of invoices were paid outside agreed terms and 2% took 61 days or longer. Filed 30 Apr 2026.

The pattern is steady — their reported average moves within about ±3 days period to period.

On the latest reported averages: Slower than 59% of the 158 large companies reporting in electricity & gas.

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

Payment code: Prompt Payment Code Offers e-invoicing

In their own words · from the filing

Standard payment terms

42 days from invoice date

Dispute resolution

All disputes raised will be handled by a combination of the dedicated Purchase to Pay team, the Procurement team and the business unit working with the supplier

Every statutory report on record

Most recent first.

PeriodAvg daysOutside terms61+ daysFiled
H1 2026290%2%30 Apr 2026
H2 2025291%2%11 Nov 2025
H1 20253214%3%29 Apr 2025
H2 20242710%2%31 Oct 2024
H1 20242813%3%2 May 2024
H2 20233115%5%31 Oct 2023
H1 20232615%2%28 Apr 2023
H2 20222720%2%28 Oct 2022
H1 20222820%4%30 Apr 2022
H2 20213326%10%31 Oct 2021
H1 20214211%6%29 Apr 2021
H2 20203534%5%29 Oct 2020
H1 20205318%7%30 Apr 2020
H2 20193415%3%30 Oct 2019
H1 20194519%11%30 Apr 2019
H2 20184921%14%30 Oct 2018

On the public register · Companies House

Company record

Status
Active
Type
Private Limited Company
Incorporated
12 Jun 1997
Registered office
1-3 STRAND, WC2N 5EH
0 outstanding charges on the register Accounts due 31 Dec 2027

Open the full record at Companies House.

Quick answers · National Grid Interconnectors Limited

Are they getting slower or faster?
Their reported average is steady — within about ±3 days period to period, around 29 days.
What's their typical pay point?
Their latest reports average around day 29, moving within about ±3 days. Treat that as a historical reference point, not a promise for a new invoice.
Can I see what this means for my invoices?
Run the live check — it re-reads their record and their live Companies House file, on the amount you invoice.
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How UK payment reporting works

What is a Payment Practices Report?
UK companies and LLPs above a size threshold — broadly, two of: turnover over £54m, balance sheet over £27m, or more than 250 employees — must report twice a year, under the Reporting on Payment Practices and Performance Regulations 2017, how quickly they actually pay suppliers: the average time to pay, the share of invoices paid in 30 days or fewer, 31 to 60 days and 61 days or longer, and their standard payment terms. Those thresholds apply to financial years beginning on or after 6 April 2025; for earlier financial years they were £36m and £18m, with the same 250-employee test.
What does "paid outside agreed terms" mean?
The share of invoices paid later than the terms in the supplier contract. If terms are 30 days and an invoice is paid on day 45, it counts as paid outside terms, regardless of the headline average.
How often is this data updated?
Each report covers a six-month period and must be filed within 30 days of that period ending, so a company's record refreshes roughly twice a year. PaidLate re-reads the register as new reports are filed.
Is this official government data?
The underlying payment figures come from the company's own statutory filings on the gov.uk payment-practices service; company-status data comes from Companies House. PaidLate calculates trends, comparisons and summaries from those records. It does not use surveys or credit-agency scores.

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-03385525 · latest period to 31 Mar 2026

Verify the original Companies House file

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