What Are the Best Telecoms for Business in the UK? (2026)

What does telecoms for business include in 2026?

Telecoms for business means the connections and services a company uses to communicate: a broadband line, a phone service carried over it, a phone system to route calls, a backup connection, and the lines behind alarms, lifts and card machines. Business telecommunication covers all of it, not just the desk phones.

Most firms think of telecoms as two bills, broadband and phones. In practice there are usually five parts. The fifth is the one that causes trouble in 2027.

When is the landline switch off, and will your business phone stop working?

The landline switch off happens on 31 January 2027, when Openreach retires the PSTN (Public Switched Telephone Network), the analogue copper network that has carried UK calls for decades. ISDN, the older digital service behind many business phone systems, closes with it. Openreach confirms that all traditional phone lines go digital on that date.

None of this is sudden. Openreach stopped selling new analogue lines across the UK on 5 September 2023, and in December 2023 the major providers signed a charter promising not to move vulnerable telecare users until their equipment was proven to work. Migrations resumed once those protections were in place. The final wave is under way now.

So yes, a business phone still running on an analogue or ISDN line will stop working unless it is moved in time. Openreach is piloting Emergency Voice Access (EVAc), a temporary voice only service that keeps basic calls working for a limited period, but Openreach itself says it may not support the calling features you use today. Providers such as Zen warn it will not carry alarms or card terminals, and reports disagree on whether business lines get it at all.

Waiting for EVAc is not a plan.

Which business devices are affected?

Desk phones are the obvious casualty. The bigger risk sits in equipment that dials out quietly over a phone line and looks fine until the day it fails. Openreach lists alarms, CCTV, payment terminals, telecare devices, door entry systems and lift phones among the services affected.

The practical takeaway: sit down with your last three phone bills and put a named device next to every number on them. Any number you cannot match to a device is probably one you can cancel. Every number you can match needs a migration date before Christmas.

If card terminals need replacing anyway, it is a sensible moment to compare card terminal and merchant fee options. Alarm and lift lines belong in the same plan as your wider resilience planning for critical utilities.

How much is an old phone line costing you in 2026?

More every quarter. Openreach sells the wholesale analogue line, known as Wholesale Line Rental (WLR), that most business providers resell, and it is raising the rental in three steps during 2026. In the same July announcement it set out a 20% rise on 1 April, 40% on 1 July and a further 40% on 1 October 2026, which takes the rental to double its original level.

Steps shown as a share of the original £10.65, which is how the rental reaches double its starting price. These are wholesale prices; your provider sets the retail price on your bill.

The pattern to notice: the wholesale cost of an analogue line doubles in a single year, for a service that disappears in January anyway. Providers pass these rises through. The lines that cost most are often the ones doing least.

A common pattern on business bills: the main phones moved to VoIP years ago, yet two or three analogue numbers are still billed every month for an alarm, a lift and a franking machine nobody uses. Cancelling or migrating those lines is the quickest saving in telecoms right now. Build the change into your plan for budgeting for broadband and phone costs in 2026, and see our guide to cutting telecoms costs alongside energy and water.

What does a business telephone line and broadband look like after 2027?

After January 2027 a business telephone line and broadband are the same thing. There is one connection, and your calls run over it as data. The only real choice is which connection.

FTTP (fibre to the premises), also called full fibre, runs fibre all the way into your building. SoGEA (Single Order Generic Ethernet Access) uses fibre to the street cabinet and your existing copper for the final stretch, without the analogue phone service, so there is no line rental to pay. It replaces FTTC (fibre to the cabinet), which needed a separate analogue line alongside it.

Most SMEs should take full fibre wherever it is available. Where it is not, SoGEA is a perfectly good business connection and often the simplest way off the old network, because the copper is already in place. The same logic applies to a commercial phone line and broadband in a shop, restaurant or warehouse: one connection, calls over it, and a plan for every device.

You no longer need a landline for business broadband. Both full fibre and SoGEA work without one, and your existing number can move onto the new service.

What happens to your phones in a power cut?

Digital phone lines need mains power, because the router and the handset both do. Openreach advises anyone who relies on their landline to tell their provider so battery backup can be arranged. Ofcom’s guidance expects providers to offer at least one way to reach the emergency services for a minimum of one hour during a power cut, free for customers at risk because they depend on their landline.

For most businesses the realistic fallback is a mobile phone. For card terminals and alarms, a battery on the router and a 4G path now matter far more than they did on copper.

Do you need a leased line, or is business broadband enough?

Most small businesses do not need a leased line. Full fibre with an automatic 4G or 5G backup covers a typical office comfortably, at a fraction of the cost. Any provider pushing a leased line onto a five person office is selling something.

The difference is contention. Broadband, including full fibre, is contended, meaning the capacity between your street and the network is shared with neighbours. A leased line is uncontended: the circuit is yours alone, upload matches download, and repairs come with a contractual fix time.

A leased line earns its price when an hour offline costs more than a month of the price difference, when the business uploads heavily all day, or when several sites need a private, predictable link. Design studios, video producers and firms running large cloud backups are the usual candidates. For everyone else it is an expensive way to feel safe.

Speed matters less than people think for calls. Voice uses very little capacity; what spoils call quality is an unstable line or uploads saturating the connection, so check the upload figure and ask for a router that prioritises voice traffic. Multi site businesses should also look at aligning contracts across several sites so upgrades and renewals land together.

Which business telecoms solution suits a small business?

The phone system is a separate decision from the connection, and it is where most money is wasted. There are three sensible options. The right one depends on how your team actually works.

For most firms the migration runs in four steps. First, list every number and every device that uses a line before you speak to any provider.

Second, choose the connection for each site, full fibre or SoGEA, plus a mobile backup. Third, pick the phone system that matches how people work, not the longest feature list. Fourth, have the new provider port your numbers before you give notice on the old service.

One risk rarely gets mentioned. On copper, the phones and the card terminal failed separately; on a single broadband connection, one outage takes down voice and payments together. Put the terminal, or the whole router, on an automatic 4G backup, especially if most of your revenue is taken at the counter.

If you are fitting out new premises, add telecoms to the same checklist as your other office running costs, because installing a new line can take weeks. Ordering early costs nothing.

What are your rights on a business broadband contract?

More than most owners realise, and they depend on the size of your organisation. Ofcom’s general conditions for business customers set a floor for every business and stronger protections for the smallest firms.

Two details catch people out. The 10 worker threshold counts people, not payroll: Ofcom counts individuals working for the organisation, including volunteers, so small charities are usually covered while a 12 person office is not. If you sit above the line, read the renewal clause yourself before you sign.

The second is price rises. Under Ofcom’s rule that took effect on 17 January 2025, smaller firms must be told any future rise in pounds and pence when they sign, and a rise written into the contract that way does not give you a right to leave. You agreed to it at the start.

Switching works differently from home broadband. One Touch Switch, the quick process for home customers, does not apply to business lines, so the new provider arranges the move and the number port, and Ofcom’s automatic compensation scheme covers residential customers only. If your broadband falls below the minimum speed promised at sale, providers signed up to Ofcom’s voluntary Business Broadband Code of Practice must let you leave without penalty.

Port first, cancel second. Cancelling the old contract before the port completes is the most common way small firms lose a number they have had for decades. Our notes on serving notice before an auto renewal and managing a supplier contract from tender to renewal cover the mechanics.

What are your options if your premises cannot get full fibre?

Coverage is better than many owners assume. Ofcom’s Connected Nations update, using January 2026 data, put full fibre within reach of 82% of UK residential premises and gigabit capable broadband at 89%. The government’s Project Gigabit progress update for September 2026 puts gigabit coverage at more than 88% of homes and businesses, with around 4 million premises still to reach and a target of 99% by 2032.

The two figures measure slightly different things, residential premises against homes and businesses, which is why they do not match exactly. Either way, most premises without full fibre today can get SoGEA over the copper they already have.

If you are in the remaining gap, a 4G or 5G router can be surprisingly strong where the signal is good. Satellite broadband is a last resort for sites nothing else reaches. The broadband Universal Service Obligation (USO) also lets homes and businesses request a connection of at least 10 Mbit/s download and 1 Mbit/s upload where nothing that good is available for under £45 a month and no public scheme will reach them within 12 months; BT, or KCOM in Hull, builds it and covers costs up to £3,400 excluding VAT.

Do not sign a long contract for a slow line if full fibre is planned for your street within a year. Check the build plans first, then choose a contract length that lets you move.

Compare business telecoms with Green Light

Green Light reviews your phone lines, broadband and device lines in one pass. We match every number on your bills to the equipment that uses it, flag the lines you can cancel, and benchmark the connections you keep against providers across the market.

We can line telecoms up with the renewal dates on your business energy contract, so every utility is reviewed on one calendar. Where your current setup is right, we tell you that too. The Green Light team will explain the options in plain English before you commit to anything.