What it really costs to call 0800 numbers from a mobile in 2026

Short version: 0800 calls from a UK mobile are free for the caller, on every UK network, and have been since 1 July 2015. If your mobile bill shows a charge for an 0800 call, that's a billing error. Long version below — the full mechanics, what the business actually pays, what changed in 2015, and the edge cases (payphones, business lines, international, Isle of Man/Channel Islands).

What changed on 1 July 2015

Before 1 July 2015, calling an 0800 number from a UK mobile could cost the caller up to ~40p/min, depending on network and tariff. Landlines were free; mobiles weren't. Predictably, consumers stopped ringing 0800 numbers from their phones — bad for charities, helplines, government services and any business relying on inbound on mobile-first traffic.

Ofcom's UK Calling reforms fixed it. Three changes happened simultaneously:

• 0800 and 0808 became free from UK mobiles — on every UK mobile network. No special tariff required. They now behave on mobile exactly as they always have on landline.
• Non-geographic numbers (084, 087, 09, 118) got a split-charge structure— an "access charge" (set by your phone company) plus a "service charge" (set by the business you're calling). Both must be clearly disclosed at the point of marketing.
• Standard ranges weren't affected — 01, 02, 03, 05, 07 calls still come out of inclusive minutes.

What a UK business actually pays per 0800 call

The business receiving the call. The 0800 number sits on a range allocated by Ofcom to a licensed UK carrier (us, BT, Gamma, Vonage, Voxbone, etc.). When a call comes in, the originating network — landline, mobile or other — passes the call to the receiving carrier, which routes it to the business's actual phone (a landline, a mobile, a SIP trunk, an IVR menu).

The receiving carrier charges the business for the inbound minutes. With NumberGroup Membership, that's passed through at wholesale: ~0.3p/min to UK landline destinations, ~0.6p/min to UK mobile destinations. The 0800 number rental itself is free with Membership — you only pay for actual call minutes.

The real cost the business pays on a mobile-originated 0800 call

When the caller is on a UK mobile, there's a regulated extra cost: the mobile origination charge (sometimes called "mobile access charge" or MAC). Mobile networks charge a small per-minute fee to hand the call to the receiving carrier. That fee is regulated by Ofcom and is currently in the region of 0.5–1p/min.

Some 0800 providers hide this in the headline rate. Others bill it as a separate line item. NumberGroup passes it through at cost — what we're charged, you're charged. No markup. See the live numbers on the wholesale call rate card.

Access charge + service charge — for 084/087/09 (not 0800)

The 2015 reforms introduced a clearer two-part charging structure, but it only applies to 084, 087, 09 and 118 numbers — not to 0800/0808 (which are free) and not to 01/02/03/05/07 (which come out of inclusive minutes).

For 084/087/09:

• Access charge — set by your phone company, applied per minute. They must tell you on the bill and in the contract.
• Service charge— set by the business receiving the call, applied per minute or per call. They must disclose it any time they advertise the number ("calls cost 7p/min plus your phone company's access charge").

So a 0844 number advertised at "7p/min plus access charge" on a network charging 2p/min access = 9p/min to the caller. Full breakdown on the UK phone number prefixes reference.

What if I'm calling from a business phone?

The 2015 reforms cover residential lines and consumer mobile contracts. Business lines (your office PBX, your work mobile fleet) are technically excluded — your provider has flexibility on how they bill 0800/0808 calls from those lines. In practice, almost every UK business provider treats 0800 the same as a consumer line (free). But if you're on a legacy ISDN contract with a specialist business telco, check.

What about payphones?

Calls from BT payphones to 0800 numbers are normally free for the caller. But there's a catch on the receiving end: the business pays an additional payphone surcharge on top of the normal inbound rate — around 80p/min charged by the originating wholesaler. If you take a lot of inbound from public-phone callers (some charities, helplines, services aimed at people without their own phone), that adds up.

Some 0800 services let you block payphone calls if it's becoming a cost problem. With Membership, ask our team — we'll configure it if you genuinely need it, though we generally don't recommend it for businesses that care about reach.

Are text messages affected?

No. The UK Calling reforms only changed voice call charging. Texts to non-geographic numbers continue to be charged at whatever your mobile network sets (often included in inclusive texts; sometimes charged separately for short codes and premium-rate services).

Isle of Man and Channel Islands

The Isle of Man and the Channel Islands (Jersey, Guernsey) are not part of the UK telecom regulatory framework. They have their own structure for non-geographic calls, including 0800. Calls from those jurisdictions to UK 0800 numbers may not be free — check with your local operator.

The "basic rate" legal requirement

UK consumer law requires businesses selling regulated goods or services to offer a basic-rate number for customer service (Consumer Rights Act 2015, separate from the Ofcom UK Calling reforms). Basic rate means a number that costs the same as a 01/02 call, or is free. 0800/0808/03 all qualify. 084/087/09 don't.

If you currently run your customer service line on an 0845, the straightforward fix is to port to 03 or 0800 — your customers get a basic-rate number, you stay compliant, and the consumer-perception problem of 0845 goes away. Membership includes 03 numbers and 0800 numbers unlimited, and here's the case for which prefix to choose.