Thames Water Demands £2,000 Bill Due to Its Own Billing Error
A London resident has been blindsided by Thames Water with a nearly £2,000 bill, backdated to 2020, all stemming from the company's own mistake. The water firm admitted it erroneously halted direct debit collections six years ago and failed to send any bills since, leaving the customer unaware of accumulating charges.
Regulatory Gaps in Water Billing Protections
Unlike energy bills, where back-billing rules limit charges to 12 months for domestic customers, water companies can legally reclaim up to six years of unpaid fees if they forget to bill households. Businesses enjoy more protection, with a 24-month cap. The Consumer Council for Water expects firms to waive such charges when the error is theirs and will investigate complaints if they do not.
Initially, Thames Water acknowledged its system error and promised to write off charges older than 12 months, but then attempted to recover almost the full amount. After intervention, the company buckled, agreeing to waive all charges from April 2020 to March 2026 and apologising for the inconvenience.
Another Customer's Struggle with Metered Tariffs
In a separate case, a customer identified as GB found himself in a frustrating loop with Thames Water after moving into a new flat with a smart meter. The company placed him on an unmetered tariff costing £160 monthly, far above the average £50 for a two-person household. Despite providing evidence of the existing meter, Thames Water insisted on sending engineers to confirm it, leading to repeated appointments and confusion.
GB was bombarded with messages urging him to install a meter, even though one was already in place. Only after external contact did Thames Water act swiftly, registering the meter to his account, switching to a metered tariff, and issuing an apology within two hours.
Consumer Advice and Vigilance
This incident underscores the importance of monitoring all utility bills closely, as regulatory protections for water consumers are weaker than in other sectors. Customers are advised to check statements regularly and report discrepancies immediately to avoid unexpected back-billing. While Thames Water resolved these cases after pressure, the experiences highlight systemic issues in billing practices and consumer communication.
The Guardian's Consumer Champions team welcomes letters on such issues but cannot respond individually. Submissions should include a daytime phone number and are subject to publication terms.
