The Broadband Universal Service Obligation Explained

What Is the Universal Service Obligation?

The broadband Universal Service Obligation — commonly abbreviated as the USO — is a legal framework introduced in the UK in March 2020. Under the USO, every residential premises and every small and medium-sized business in the UK has the right to request a broadband connection that meets the following minimum standard:

• Download speed: at least 10 Mbit/s
• Upload speed: at least 1 Mbit/s
• Latency: sufficient for effective use of standard internet applications
• Reliability: a connection that remains stable under normal conditions

The USO does not guarantee gigabit speeds, full-fibre infrastructure, or superfast broadband. It sets a floor — a minimum acceptable level of connectivity below which no UK premises should remain permanently without recourse. The 10 Mbit/s download figure reflects the Ofcom assessment of what is needed for ordinary internet use: video calls, web browsing, streaming standard-definition video, and similar activities.

Who Are the Universal Service Providers?

Ofcom has designated two companies as Universal Service Providers (USPs) — the organisations legally required to provide a connection to any eligible premises that requests one:

• BT (via Openreach): Responsible for the vast majority of the UK — England, Scotland, Wales, and most of Northern Ireland. When a property in these areas requests a USO connection, BT/Openreach is the designated provider.
• KCOM: Responsible for the Kingston upon Hull area, where KCOM has historically operated the local telephone network rather than BT. KCOM is the USP for eligible premises in and around Hull.

Being designated as a USP does not mean BT or KCOM must provide ultrafast broadband or full-fibre. They must provide a connection meeting the 10 Mbit/s / 1 Mbit/s minimum standard. In practice this is often delivered over upgraded copper infrastructure, fixed wireless access, or in some cases satellite broadband where terrain makes ground-based solutions uneconomic.

The £3,400 Cost Threshold

The USO does not require BT or KCOM to fund unlimited deployment costs. If providing a connection to a specific premises would cost more than £3,400, the USP is entitled to ask the requesting customer to contribute the excess amount above that threshold before proceeding with the build.

This threshold — which Ofcom set to balance universal access against the cost burden on USPs — reflects the approximate cost of connecting a reasonably remote premises. For the most isolated rural properties, actual build costs can reach tens of thousands of pounds due to the length of cable or infrastructure needed. In those cases:

• The USP provides the first £3,400 worth of deployment at no cost to the customer.
• Any costs above £3,400 are quoted to the customer, who can choose to pay the excess, contribute partially, or decline.
• If declined, the USP has no further obligation under the USO to connect that premises.

In practice, the threshold means the USO functions as a genuine right to decent broadband for most rural and semi-rural properties — where costs are elevated but rarely approach the threshold — but provides limited protection for the most extremely isolated locations without customer co-funding.

How to Request a USO Connection

If you believe your premises lacks a broadband connection meeting the 10 Mbit/s / 1 Mbit/s standard, and no commercial provider offers one at a reasonable cost, you can make a formal USO request. The process works as follows:

• Check eligibility: Use Ofcom's broadband availability checker or Openreach's postcode checker to establish whether any existing product at your address meets the USO standard. If a qualifying product is already available, no USO obligation arises — you simply need to order it.
• Contact the USP: If no qualifying product is available, contact BT (for most of the UK) or KCOM (for Hull) directly to make a formal USO request. BT handles these through a dedicated USO team. You will need to provide your address and evidence that no existing product meets the standard.
• Receive a quote: The USP will assess the cost of connecting your premises. If the cost falls within the £3,400 threshold, no charge is passed to you. If it exceeds the threshold, you will receive a quote for the excess.
• Timeframe: Once a valid request is accepted, the USP is required by Ofcom to complete the connection within twelve months, subject to reasonable practical constraints.

If you believe your USO request has been improperly refused or unreasonably delayed, Ofcom provides a complaints and escalation mechanism. Ofcom publishes guidance on its website covering the full USO process and your rights as a requester.

What "Below USO" Means in Ofcom's Data

In Ofcom's Connected Nations reports — the dataset that powers PlainBroadband — "below USO" premises are those where no fixed-line broadband product capable of at least 10 Mbit/s download and 1 Mbit/s upload is available from any provider. These are the premises most likely to be in scope for a USO request, assuming no satellite or fixed wireless product meets the standard either.

PlainBroadband displays the below-USO figure for every local authority in the UK, derived from Ofcom's 2025 data. In urban authorities the figure is typically less than 0.1% of premises — often effectively zero. In the most rural local authorities it can reach 1–3% or higher, representing hundreds or even thousands of premises that may be entitled to request a USO connection.

It is important to note that "below USO" reflects infrastructure availability, not subscription. A premises where only a satellite product meets the USO standard — but no ground-based product does — may or may not appear in the below-USO figures depending on how Ofcom classifies the available technology in that area.

The USO and the Broader Connectivity Picture

The USO sits at the base of the UK's broadband policy framework. Above it are the superfast (≥30 Mbit/s), ultrafast (≥300 Mbit/s), and gigabit-capable (≥1,000 Mbit/s) tiers that characterise modern broadband ambitions. The USO addresses the floor — the worst-connected premises — while Project Gigabit addresses the ceiling, extending full-fibre to commercially unviable areas that would otherwise remain on slower technologies.

As full-fibre coverage expands under Project Gigabit, the number of below-USO premises should diminish further. However, the very hardest-to-reach properties — on remote islands, in upland areas, or at the end of very long cable runs — may remain reliant on the USO mechanism as the fallback guarantee of last resort for years to come.

To see how the below-USO figures vary across the country, explore the rankings page on PlainBroadband, which allows you to sort all 361 local authorities by their proportion of below-USO premises. The methodology page explains how Ofcom's below-USO metric is defined and calculated in the Connected Nations dataset.