Who pays if the engineer finds nothing wrong with the line?

An engineer is coming, and somewhere in the back of your mind is the question nobody wants to ask on the phone: is this going to cost me?

It might. The rule across the industry is broadly the same — you pay when the fault turns out to be on your side of the line — but the figures differ, two large providers do not publish one at all, and the check that decides which side the fault is on is something you can do yourself before anyone is booked.

Openreach cannot bill you — and cannot book you either

Start here, because a lot of confusion downstream comes from getting this wrong.

Openreach maintains the network for most UK providers, but as it says on its own help pages: “We maintain the UK’s broadband network, but we don’t sell services directly. All bookings are handled by your provider.”

So the engineer at your door may work for Openreach, and the fault may be in an Openreach cabinet, and none of that changes who your contract is with. Asked directly whether you will be charged for a repair, Openreach’s answer is to send you back: “Your provider will let you know if charges apply, depending on the type of fault and your service agreement.”

The figures below therefore come from providers, not from Openreach — and where a provider does not publish one, we say so rather than filling the gap.

When you get charged, and how much

Provider	Published charge	What triggers it
TalkTalk	Maximum potential charge of £75, shown on the bill as “Engineer charge”	No fault found with your service, or the fault relates to a condition in your property or garden. Faults on your main phone socket, and issues caused by personal devices on your line, may also be charged. Not charged for faults caused by Openreach equipment
TalkTalk, master socket work	£128.40	Installing or replacing a main phone socket, if you request it. A different thing from a fault visit, and often confused with it
EE	£50 Engineer Visit charge, in EE’s Legacy Home Price Guide, prices effective 1 August 2026	An engineer visits to investigate a broadband fault and the cause is identified as damage or a fault within your property, not on the BT or EE network
BT	No figure published for residential customers on any page we could read	BT Business’s published list of chargeable causes — we found no residential equivalent: no fault is found; the fault is on non-BT equipment; the fault is due to damage caused by someone at the premises
Sky	No figure published; the contract says Sky will confirm its call-out fees when you arrange the visit, and lists a number to ask	Sky’s contract makes you responsible for the reasonable costs of engineer call outs where the engineer “attends but finds there is no fault with your line or the ONT”, where you do not give access at the agreed time, where Sky reasonably believes you or your equipment caused the fault, or where the fault is “beyond the primary telephone socket onwards inside your home”
Plusnet, Vodafone	Not published on any page we could read	—

Two honest caveats on that table, because it is the sort of thing readers act on.

The EE figure sits in its legacy price guide, and EE contradicts itself. The £50 is published in the Legacy EE Home Price Guide, prices effective 1 August 2026 — so it is current, but it applies to EE’s legacy home plans rather than to every EE broadband customer. Separately, EE’s own help centre says that if it believes the fault is within your home it will send an EE Guide Home Visit within a two-hour slot and “you won’t be charged”. Those may describe different visit types and both be true, but they read as opposites. Ask EE which plan you are on and which kind of visit you are being booked for.

BT declines to give a number, and we are not going to invent one. BT’s position is that for most engineer visits there is no charge, but there may be one where an engineer is called out for a problem you could potentially fix yourself — and it points at its Price List rather than stating a figure in the help article. Third-party pages that quote a BT residential call-out fee are quoting something we could not find on BT’s own site. Ask BT for the figure before you accept the visit.

The test that decides who pays

On a copper or part-fibre line, the master socket is where responsibility changes hands: providers’ terms put everything beyond it on your side. Sky’s contract says so in as many words, making you responsible for the costs where the fault “is on any part of your telephone line beyond the primary telephone socket onwards inside your home”. Behind the faceplate there is a test socket, and it is the single most useful thing in this entire subject.

First, check yours can be opened. BT Business’s instruction is to locate the main socket “which has a horizontal bar across the front template”, and it warns that if your main socket does not have that horizontal bar, “don’t unscrew the faceplate”. Not every master socket is designed to come apart.

If yours has the bar, BT Business describes the mechanism plainly: “Carefully remove the two small screws and the bottom half of the faceplate should slide out. On the right hand side is a test socket. This connects you directly to the telephone line and bypasses any extension wiring you may have.”

Unplug everything else from the phone sockets first — modems, extension leads, adaptors, microfilters, hubs and routers.

Then read the result. BT again:

If you can dial out at the test socket, the fault is likely to be with your internal wiring. […] If you can’t dial out at the test socket, the fault is likely to be with the line and you’ll need to report it to your telephone service provider.

The same logic applies to broadband: plug the router into the test socket. If the problem disappears, the fault is in your own extension wiring, and an engineer called out for that is exactly the visit that gets billed. If the problem is still there at the test socket, it is the line’s problem, and it is not yours to pay for.

Note BT’s hedge — “likely to be” — and keep it. The test is strong evidence, not a verdict.

On full fibre this test is not part of your broadband path. BT states that its test-socket instructions are for copper and fibre-to-the-cabinet customers, not for those on full fibre — the router plugs into an Openreach Optical Network Terminal rather than a phone socket. An old master socket may still be on the wall from the copper line; testing at it tells you nothing about a fibre connection. If that is you, the equivalent diagnostic is the ONT’s lights — our guide to the Openreach ONT and Digital Voice lights explains what each one means.

The double hit nobody mentions

Here is the part that turns an annoying bill into an expensive week, and it is worth understanding before it happens.

If the fault turns out to be inside your home, two things are likely to be true at once:

• you may be charged for the visit, on the figures above; and
• you are unlikely to get anything for the repair delay under your provider’s automatic compensation scheme. BT’s published examples of when repair-delay compensation does not apply include “the fault is inside your home”. EE publishes the identical wording — though EE is part of BT Group and the page is the same page, so treat that as one publisher, not two.

So the household that spends a fortnight without proper broadband because of a failing extension lead may pay for the visit and get nothing for the delay. That is not unfair — it is just not obvious, and it is the strongest argument for doing the test-socket check on day one rather than day twelve. Note the limb it attaches to: this exclusion is about the delayed-repair payment, not about a missed appointment, which is a separate trigger.

BT’s exclusion list is worth reading for a second reason: it also excludes a fault that “is intermittent, when your service cuts in and out”. If your connection is dropping rather than dead, our guide to broadband that keeps dropping out covers where that leaves you.

What actually happens on the day

Openreach publishes its own sequence for a repair visit. The engineer will:

• arrive within the confirmed time slot from your provider;
• carry out any necessary tests to diagnose the fault;
• repair or replace damaged network equipment where required;
• make sure everything is working, and test the connection before leaving.

Around that, several things are worth knowing in advance:

• Openreach asks you to have someone aged 18 or over at home for the full appointment window — it lists this among the things that help a repair visit go smoothly, rather than only as a way to let the engineer in.
• The engineer may never come inside. If the problem is at the roadside cabinet or in the network, that is where the work happens.
• They will usually ring or text first to check you are in and ask about access or parking, and to say roughly when they will arrive within the slot your provider gave you.
• Check the ID badge. Openreach warns that some of its newer engineers drive plain white vans, so the badge is the identification, not the livery.
• You may be asked to sign a permission-to-work form on the day, if the engineer needs to do any digging or drilling. You are being asked because you can say no.
• It may not finish in one visit. Openreach says that in a small number of cases it may need to do extra work or come back — because extra equipment is needed, the fault is more complex than expected, or additional permissions are required, such as for digging in a public area.

Openreach publishes no slot length of its own; the slot is your provider’s. Where providers do publish one, they vary: EE gives a two-hour window for its own in-home visits, and Vodafone says a broadband installation can take up to four hours.

If you miss it, or they do

If they miss it, this is one of the three situations Ofcom’s automatic compensation scheme covers. BT’s own wording: if an engineer misses your scheduled appointment or changes it with less than 24 hours’ notice, you get £32.31 for each missed appointment. It should be credited automatically. Our compensation calculator works out what a run of problems adds up to.

If you miss it, you may be charged, and the deadlines for rearranging are provider-specific and tight:

• TalkTalk asks you to reschedule before noon the day before — or noon on Saturday for a Monday slot — and publishes a figure of £75 either way, for its own engineer or an Openreach one.
• EE requires 48 hours’ notice to cancel a booked new line, and lists a charge of £60 in its price guide where that notice is not given.
• Sky’s 3.30pm-the-working-day-before deadline is published for rearranging the installation of a New Phone Line, where missing it lets Sky either refund the appointment charge minus its reasonable costs, or refund and charge a reasonable default fee it told you about when you booked. For a fault visit Sky’s contract makes you responsible for the call-out costs where you do not give the engineer access at the agreed time.

TalkTalk also publishes the fullest list of what counts as your fault, which is useful because most of it is not about forgetting: the engineer could not access or was refused access, the address supplied was wrong, no adult was present, the address was a building site or unsuitable to work in, there was no electricity, or there were health and safety concerns.

And separately from any charge, missing the appointment pauses compensation. BT and EE both publish the same sentence: compensation stops where the repair is delayed because you missed the appointment — though it starts again if the repair is not then completed during the next engineer visit.

How to keep the bill at nothing

1. Ask what the charge would be before you agree to the visit. Ofcom’s own advice is to ask whether there will be a charge if the fault turns out to be your own devices.
2. Check the obvious physical things — cables seated and undamaged, router in the main socket rather than an extension, microfilter working.
3. Try a different router if you can borrow one. Faults caused by your own equipment are chargeable almost everywhere.
4. On copper or part-fibre, use the test socket. Two screws, faceplate off, plug in behind it.
5. Read the result correctly. Fault gone at the test socket points to your own wiring; fault still there points to the line. BT hedges both as “likely to be”, and so should you when you report it.
6. On full fibre, check the ONT lights instead — there is no test socket.
7. Report what you found, not just that it is broken. A report that says the fault persists at the test socket with a second router gets the visit aimed at the network.
8. Make sure an adult can be there for the whole slot, and reschedule inside your provider’s deadline if not.
9. Check the ID badge at the door.

Related

• Broadband outage: what to do — the first hour, before an engineer is even in the conversation.
• Broadband automatic compensation — what the scheme pays, and when.
• Which ombudsman handles my provider? — if a charge is disputed and the provider will not move.

→ Use the compensation calculator