UK businesses face rising costs as PSTN copper network retirement approaches

The transition from the traditional Public Switched Telephone Network (PSTN) to All-IP infrastructure in the United Kingdom has entered a critical phase. With Openreach planning the full decommissioning of legacy copper-based services by January 2027, companies are being warned of significant financial consequences if they do not migrate their communications systems beforehand.

Openreach has implemented a tiered pricing structure that will escalate costs for businesses still using Wholesale Line Rental (WLR) products. Prices are set to increase by 20% on April 1, 2026, followed by two additional 40% hikes in July and October, effectively doubling service costs compared to 2025 levels. James Lilley, Director of All-IP at Openreach, cited the increasing difficulty and expense of maintaining obsolete analogue infrastructure as the primary driver for these adjustments.

The impact of the switch extends beyond standard telephone lines. Many organizations overlook critical hardware linked to PSTN infrastructure, including security alarms, payment terminals, and telecare devices. Transitioning these systems requires a comprehensive site audit and compatibility testing to prevent service interruptions once the copper network is retired.

Industry experts note that as the retirement date approaches, the availability of specialized parts and engineers with experience in legacy copper technology is rapidly declining. Businesses are urged to perform systematic equipment inventories and utilize testing resources provided by network operators to ensure a smooth transition to IP-based communications before the first phase of price increases begins in April 2026.