Debt information

Thames Water is part of a group of companies. View our simplified corporate structure.

Thames Water Utilities Limited (TWUL) Group includes:

  • Thames Water Utilities Limited (operating company)
  • Thames Water Utilities Finance PLC (financing company)
  • Thames Water Super Senior Issuer PLC (financing company)

Our borrowings are financed with a broad portfolio of debt, diversified by source and maturity. Our objective is to maintain enough cash and undrawn facilities to fund ongoing obligations for at least the next 15 months.

Interest rate risk is managed through derivatives. The majority of our debt is on a post-swap basis, either in fixed rates or index-linked. We swap all our non-sterling debt to sterling through cross-currency interest rate swaps.

We spread the maturity profile of our debt. This includes issuing long-dated debt to fund long-term assets of our regulated business. Some of our debt is issued in green or sustainable format to fund capital projects. These deliver environmental benefits, under our Sustainable Financing Framework.

Bond prospectuses and final terms

Financial statements

Investor reports

Sustainable financing

Other group companies debt information

TWUL credit ratings

This table shows the credit ratings for Thames Water Utilities Limited (TWUL) Group.

Agency

Class A

Class B

Outlook

S&PCCCCCnegative
Moody'sCaCstable


Rating agency reports

The following reports show our latest credit ratings.

Standard & Poor's

February 2025

.pdf | 148 KB

Moody's

July 2026

.pdf | 52.8 KB

TWUL debt maturity

This chart shows Thames Water Utilities Limited Group’s debt maturity over the next 15 years to 31 March 2040, as at 31 March 2025 (£m).

TWUL debt maturity graph

Note that as of 18 February 2025, the maturity date of all outstanding debt was extended by two years, which is reflected in this chart. This will revert to the prior maturity date under certain conditions, including that the relevant class of debt is investment grade with two rating agencies.

Excludes future accretion.

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