Quick answer
Line rental is the standing charge for keeping a physical copper line connected, whether or not you make a single call. Behind it sits an Openreach wholesale product called WLR (Wholesale Line Rental), which is what your provider actually buys and resells to you. Openreach is withdrawing WLR as the copper network closes on 31 January 2027, so the retail charge built on top of it disappears with it. What replaces it is a connectivity cost plus a per-user voice service - a different shape of bill, usually a smaller one.
I spend a lot of time reading business phone bills, and line rental is where the money hides. It is a fixed charge attached to a physical thing, which means it keeps being paid long after anybody remembers what the physical thing does. This guide explains what you are paying for, how to read your bill, and what the new structure looks like. If you want that reading done for you, get a no-obligation quote and send us a recent bill.
What line rental actually pays for
When you pay line rental you are renting three things bundled together: the copper pair from your building to the exchange, the maintenance of that pair, and your connection to the public network so you can dial and be dialled.
Critically, it is not payment for calls. You could make no calls at all for a year and pay the full rental every month. That separation is deliberate and it is old - it dates from an era when the physical line was genuinely the expensive part - but it produces a peculiar commercial effect: the cost of a line has no relationship to whether anyone uses it. That is the single most important fact on this page, and everything else follows from it.
The wholesale chain behind your bill
Most providers do not own the copper running into your building. Openreach does.
| Layer | Who | What they charge for |
|---|---|---|
| Physical network | Openreach | WLR - the wholesale rental of an analogue line |
| Your provider | BT, a reseller, or anyone in between | WLR plus their margin, service and billing |
| You | Your business | Retail line rental on the invoice |
WLR (Wholesale Line Rental) is the Openreach product that lets any communications provider rent analogue lines and resell them. It is the reason competing providers can all offer you "a phone line" over the same piece of copper.
It also explains two things people find confusing. It explains why every provider's line rental moves at roughly the same time - they are all buying the same input. And it explains why line rental is ending: when Openreach withdraws the wholesale product, there is nothing for the retail charge to sit on top of. Our guide to Openreach's stop-sell covers what that already means for ordering.
How to read a legacy phone bill
Most business phone bills contain more line items than the business has lines. Work through yours in this order.
| Line item | What it is | Survives migration? |
|---|---|---|
| Line rental or WLR charge | The standing charge per copper line | No - disappears entirely |
| Additional line rental | Second, third, fourth lines | No |
| ISDN2 or ISDN30 rental | Channel-based rental for a phone system | No - replaced by SIP or hosted |
| Call charges, itemised | Per-minute usage | Usually replaced by inclusive UK calls |
| Call plan or bundle | A monthly allowance of minutes | Usually unnecessary afterwards |
| Select Services or features | Caller display, divert, hunt groups | No - normally included in the new service |
| Broadband | Rode on top of the line | Becomes a standalone connection |
| Number or DDI range charges | Your numbers | Usually smaller, and the numbers port |
| Maintenance or care level | Faster fault response on the line | Replaced by the new service's terms |
| Non-recurring or one-off | Old installs, moves, changes | Should stop |
Then do the physical half: walk the building and match each standing charge to something you can point at. Everything you cannot account for goes on an "unknown" list. That list is where the money is.
Worked example: what an audit typically finds
Illustratively, a four-line small business. The bill shows four line rentals, a call bundle, three feature charges and a broadband service.
Walking the building finds: two lines with phones on them, one line running to an alarm panel, and a fourth nobody can identify. The fourth turns out to have fed a fax machine that left in 2019. The alarm line is real and needs a proper replacement arranged with the alarm company - not a cease. Two of the three feature charges are for things nobody uses.
Nothing about that example is unusual. The pattern - one genuinely dead line, one device line that needs a specialist replacement rather than cancellation, and features being paid for by habit - turns up constantly. The lesson is the ordering: identify before you cease, because the one line you cannot explain is as likely to be an alarm as it is to be waste. Start with devices that rely on phone lines.
Why line rental is disappearing
The concept only makes sense while there is a copper pair to rent. Two changes remove it:
Broadband no longer needs a phone line. SoGEA and full fibre deliver a connection with no voice line attached, so there is nothing to rent alongside them.
Voice moved off the line. Calls now travel over the connection as a service, priced per user rather than per physical circuit.
Put together, the standing charge has nothing to stand for. What replaces it on your invoice is a connectivity charge per site and a voice charge per user - and for most businesses the total is lower, because you stop paying for capacity that sits idle.
The sting before it goes: 2026 pricing
Legacy line rental has been getting more expensive on the way out. Openreach raised WLR wholesale prices in stages through 2026 and providers passed that on, so the businesses that have not yet migrated are paying the highest prices the product has ever carried, for a service with a closing date.
That reframes the commercial question. "Wait and see" is not free - it has a monthly running cost, and that cost has been rising all year. We set out what changed and when in the 2026 WLR price rises, including when paying to exit a legacy contract early actually adds up.
Rental versus subscription: the commercial difference
It is worth being explicit about how the two models behave, because it changes how you should manage the spend.
| Line rental | Per-user voice service | |
|---|---|---|
| What you pay for | A physical circuit | A named user |
| Changes when usage changes | No | Not directly, but you can add and remove users |
| Cost of idle capacity | Full price, indefinitely | You remove the user |
| Time to add capacity | Weeks, and an engineer | Minutes |
| Time to remove capacity | A cease order and notice | Minutes, subject to contract |
| Who notices waste | Nobody | Whoever reviews the user list |
The last row is the one to act on. Under rental, waste was invisible because nothing changed on the bill when a line fell out of use. Under a per-user model, waste is visible - but only if somebody looks. Put an annual review of the user list in the diary, or you will simply have recreated the problem in a new format.
What to do now
- Pull three months of bills and list every standing charge separately.
- Walk the building and match sockets to charges. Flag anything unexplained.
- Identify device lines - alarm, lift, card terminal, door entry - and phone those suppliers.
- Cancel the lines you have positively identified as dead, and only those.
- Check which features you are paying for and whether anyone uses them.
- Check your contract for notice periods before assuming you can stop paying immediately.
- Price the replacement per user against your current bill, including the 2026 increases.
For what the replacement actually costs, see our business phone line cost guide; for the choice of replacement, business landline alternatives.
The bottom line
Line rental is a standing charge for a physical copper line, resting on an Openreach wholesale product that is being withdrawn. Both are ending, and the replacement bill has a fundamentally different shape - connectivity per site, voice per user, nothing charged per line. Most businesses come out ahead on the change alone, and further ahead once they have audited what they were actually renting. Do that audit first: it is free, it takes an hour, and it routinely pays for the migration.
Send us three months of bills and we will tell you what every standing charge is, what each one is for, and what the replacement should cost: get a no-obligation quote or call 0333 006 9399.
Getting unknown calls on a business line? Our free UK phone number checker shows which network or provider Ofcom allocated any number to, and whether the range is in service — no sign-up.
Frequently asked questions
What is business line rental?
The standing charge for keeping a physical phone line connected to the network, separate from what you spend on calls. It covers the copper pair to the exchange, its maintenance and your access to the public network - and it is payable whether you make a thousand calls or none.
What is WLR (Wholesale Line Rental)?
The Openreach wholesale product that lets any communications provider rent analogue lines and resell them to businesses. It is why competing providers can offer a phone line over the same copper, and why their prices tend to move together. Openreach is withdrawing it as the network closes.
Why is line rental being withdrawn?
Because the copper network it describes is being switched off on 31 January 2027. Broadband no longer needs a voice line underneath it, and calls now travel over the connection as a service. With no physical line to rent, the standing charge has nothing to stand for.
What replaces line rental on my bill?
Two items instead of one: a connectivity charge for the site - SoGEA, full fibre or a leased line - and a voice charge per user rather than per line. There is no per-line standing charge at all. For most businesses the combined total comes in below what they were paying.
How do I find out how many phone lines I am paying for?
List every standing charge on three months of bills, then walk the building matching sockets to those charges. Look for cables running to things that are not phones - alarm panels, lift machine rooms, card terminals, gate intercoms. Anything you cannot explain should be investigated rather than cancelled.
Should I cancel unused phone lines now?
Cancel the ones you have positively identified as dead. Do not cancel anything you merely cannot explain, because unidentified lines turn out to be alarms and lifts surprisingly often. And check your contract for notice periods first - many legacy lines carry one.
Is it worth paying to exit a legacy line contract early?
Sometimes, and the maths has shifted because legacy rental rose in stages through 2026. Weigh the exit charge against the remaining months at the increased price plus the lower cost of the replacement. Where the term has long to run at the new prices, exiting early can pay for itself.