A negotiated business mobile contract often beats anything an employee can buy off-the-shelf. It is also one of the few perks where the employer simultaneously saves money and gives staff a better experience. The UK business mobile market in 2026 looks very different to 2020 — wholesale margins have compressed, broker access has democratised, and the days of needing 50+ employees to negotiate a decent deal are gone. This guide covers what actually delivers good value for UK businesses of any size.
Three structural advantages:
Strong UK coverage, good wholesale terms through brokers, and the headline differentiator: O2's Roam at Home is genuinely included on most business tariffs. 25GB of EU data plus inclusive minutes and texts at no extra cost. For UK businesses with EU travel — even occasional — this is a real advantage. Vodafone and EE have parallel offerings but charge for them.
Strong international roaming options (paid add-ons), good corporate support, and the deepest cross-product portfolio (mobile + broadband + IoT + cloud). Best fit for businesses already on multiple Vodafone services. Wholesale pricing through brokers is competitive but rarely undercuts O2 on the basic plan.
Best 4G/5G coverage in most independent UK speed tests. Fastest network on commute routes, particularly outside major cities. Wholesale tariffs through brokers are competitive. EE's bolt-on pricing for international and roaming is somewhat weaker than O2 but the network performance is the differentiator.
UK-specific business mobile broker that resells across networks (mostly O2 and EE) with their own management portal. The portal is genuinely good — particularly for businesses with 10+ lines. Pricing is competitive, particularly on the lower-data tiers.
Worth a brief mention. Sky Mobile is a consumer brand but has a small-business tier that bundles cleanly with Sky Broadband. Strong fit for sub-5-employee businesses already using Sky for connectivity at home or at the office. Current Sky Broadband offer.
| Network / broker | Approx. monthly | EU roaming included? |
|---|---|---|
| O2 Business (broker) | £8–£11 | Yes (25GB) |
| Vodafone Business (broker) | £8.50–£12 | No (paid add-on) |
| EE Business (broker) | £9–£12.50 | No (paid add-on) |
| plan.com (multi-network) | £9–£12 | Network-dependent |
| Retail SIM-only (Smarty/iD/Lebara) | £8–£15 | Variable |
Pricing is approximate at the time of writing and varies by line-count and contract length. Brokers typically beat retail by 20–35% on like-for-like data tiers.
Where business mobile contracts win biggest is handset finance. A current iPhone with a typical 100GB plan, on a 24-month contract through a broker, often comes in at £35–£50/month total. The same handset bought outright plus a SIM-only plan typically lands at £45–£60/month over the same period (handset spread over 24 months + SIM cost). Business plans are ahead by £100–£250 across the contract.
The trick is to actively shop the handset finance, not accept the first quote. Brokers routinely have multiple finance back-ends — two quotes from the same broker on the same handset can come in £80 apart over 24 months.
Two operating models:
For most UK SMBs with employees on the road, the single-bill model wins. The HMRC tax treatment is favourable, the employee experience is better, and the per-line cost is lower.
After many SMB mobile-procurement conversations, the practical decision tree:
Three has historically been competitive on consumer SIM-only data plans but does not fit cleanly into the broker-led B2B mobile market the way O2, Vodafone and EE do. Some Three deals are signed on Three's own paperwork and billed directly. For UK SMBs the realistic short answer is: stick to O2/Vodafone/EE through a broker for centralised admin, and let employees go direct to Three on personal accounts if they specifically prefer it.
Disclosure: LeaveManager's sister company is Compare The Networks, which is a UK business-mobile broker. Where editorial here links to CTN we say so. Our editorial team has access to CTN's wholesale-pricing data and uses it as one source of UK market reference; we do not consider it the "best" broker by default and have no obligation to feature them above competitors. Pricing levels in this article reflect typical broker pricing across multiple UK brokers, not just CTN. See current mobile offers.
Several mobile-related perks layer cleanly on top of the contract itself:
For most UK SMBs, the right mobile setup is a single-bill business contract with O2 (or EE for coverage-critical workforces), procured through a broker for wholesale pricing. Handset finance built into the contract for staff who need new devices. Total per-employee cost typically £8–£15/month for SIM-only, £30–£50/month with handset. The savings vs retail are real and well worth the small admin overhead. See our tech discounts guide for handset side savings.
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