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A complete 2026 buyer's guide to UK business SIM-only deals – real wholesale pricing across all four major networks, contract length trade-offs and how to save 30-60% by going SIM-only.
Business SIM-only deals are the single most under-used cost-saving lever in UK SME telecoms in 2026. If your team already has working handsets – whether bought outright, leased, or carried over from a previous contract – then a SIM-only business plan can cut your monthly mobile spend by 30% to 60% per user without changing a single phone, number, or piece of business process.
The challenge is that the deals advertised on the major networks’ public websites are almost always retail consumer SIM-only deals, with very different pricing, allowances and contract terms than what is actually available to businesses through wholesale and broker channels.
This guide explains exactly how business SIM-only deals work in 2026, who they suit, what to look for, and what real wholesale pricing looks like across EE, Vodafone, O2 and Three. The numbers below reflect deals we are actively winning right now for SMEs across the UK, not what you will see on the network microsites.
A business SIM-only deal is a mobile contract that gives you data, minutes and texts on a SIM card, with no handset bundled in. Your business uses its own existing devices (or buys/leases them separately), and pays the network only for the airtime tariff.
The two big advantages are:
The trade-off is that you are responsible for sourcing handsets – either by paying outright, leasing through a finance partner, or letting employees bring their own devices (BYOD). For most SMEs with 5+ SIMs, this trade-off is overwhelmingly worth it.
Tell us how many SIMs you need and we'll send a like-for-like comparison from EE, Vodafone, O2 and Three the same day.
Or call 0333 358 3008
Putting consumer SIMs in business phones is one of the most common (and quietly expensive) mistakes UK SMEs make. The plans look similar on the surface but differ in important ways:
| Feature | Consumer SIM-only | Business SIM-only |
|---|---|---|
| VAT | Inclusive of VAT | Ex VAT (reclaimable) |
| Account management | Generic call centre | Named business account manager (with broker) |
| Roaming | EU only, often capped | EU + global tiers, larger allowances |
| Mid-contract uplift | Fixed pound increases | Often negotiable – can be CPI, fixed, or zero |
| Multi-SIM management | Not designed for it | Single bill, single portal, per-user controls |
| Add-ons | Limited | MDM, M365, security bundles available |
| Negotiable price | No | Yes (especially 5+ SIMs) |
The single biggest one is VAT. A £15/month consumer SIM costs your business £15. A £15/month business SIM costs your VAT-registered business effectively £12.50. That is a 17% difference before you have even compared tariffs.
Below are typical achievable wholesale prices for business SIM-only contracts across the four UK networks in Q2 2026. These are the deals our SME clients are actually signing, not retail prices from the network websites.
| Network | Plan tier | Allowance | 5G | 1-4 SIMs | 5-25 SIMs | 25+ SIMs |
|---|---|---|---|---|---|---|
| EE Business | Smart Unlimited | Unlimited data + minutes | 5G+ | £18 | £14 | £11 |
| Vodafone Business | Unlimited Max | Unlimited data + minutes | 5G+ | £16 | £12 | £10 |
| O2 Business | Business Unlimited | Unlimited data + minutes | 5G | £14 | £11 | £9 |
| Three Business | Advanced Unlimited | Unlimited data + minutes | 5G | £13 | £10 | £8 |
For lower-allowance plans (e.g. 100GB rather than unlimited), expect another £1-3/month off these figures. For very small SIM counts (1-2 SIMs), broker discounts shrink because the wholesale margin is thinner – SIM-only really starts to bite at 5+ SIMs.
Maximum flexibility, highest price. Useful for short-term contractors, seasonal staff, or as a temporary “test SIM” before committing to a longer contract on a particular network. Expect to pay 30-50% more per SIM than a 24-month equivalent.
A reasonable middle ground if you are unsure about long-term staffing or want to revisit the market in a year. Typically 10-20% more expensive than the equivalent 24-month deal.
The sweet spot – lowest price, sensible commitment length. About 90% of business SIM-only contracts we negotiate are on 24-month terms.
Cheapest sticker price, but in a market reshaped by the 2024 Vodafone/Three merger and aggressive 5G+ rollout, 36 months is a long time to be locked in. We rarely recommend 36-month SIM-only unless the saving is genuinely substantial (5%+ vs 24-month).
SIM-only is the right answer in most of these scenarios:
SIM-only is usually not the right answer if your team needs the latest flagship handsets every 24 months and your accountant prefers a single all-in monthly cost line – in which case a bundled deal can be the simpler operational choice.
Send us a copy of your most recent mobile invoice and we'll show you exactly how much you'd save by going SIM-only - same-day response.
Or call 0333 358 3008
For businesses with 5 or more SIMs, the most cost-effective business SIM-only structure is usually a shared-data plan. Instead of giving every user 100GB individually, the business buys (say) 500GB pooled across 10 SIMs – which is much cheaper because some users will use 5GB and others 80GB.
All four major networks offer shared-data SIM-only plans for business customers, though they go by different names:
For most SMEs of 10-50 SIMs, a shared-data plan typically delivers an additional 10-20% saving on top of the SIM-only saving from going un-bundled.
Every major business SIM-only plan now includes 5G as standard – there is no longer a 5G surcharge as there was up to 2023. The relevant question is whether your handsets and your location actually deliver useful 5G speeds:
If your business has unreliable fixed broadband, a 5G+ SIM-only deal can also serve as a backup business connection. We have written more about that use case in our 5G for business guide.
The mechanics are the same as any business mobile move:
For a more detailed walk-through, see our guide on how to move your business mobile network.
For a 24-month, 25+ SIM business contract with unlimited 5G data, Three Business is currently the cheapest at around £8 per SIM per month ex VAT through the wholesale channel, closely followed by O2 Business at around £9. For smaller accounts (1-4 SIMs) the gap closes – expect to pay £13-£14 per SIM at that volume.
Yes. Text PAC to 65075 from your existing line to get a free porting code, then give that code to your new network when you order the SIM. Your number moves across, usually within one working day, with no downtime longer than a few minutes.
For a single SIM, consumer deals can be cheaper at headline price – but they are inclusive of VAT, so for a VAT-registered business the effective cost difference shrinks by 20%. For 5+ SIMs, business SIM-only deals win comfortably on price, contract terms, and account management. For 25+ SIMs there is no contest – business SIM-only is dramatically cheaper.
Yes. EE Business, Vodafone Business, O2 Business and Three Business all offer unlimited data SIM-only plans for businesses in 2026. The difference between them is the fair-use sub-caps (tethering, roaming) and the speed cap if any after very heavy usage.
Most business SIM-only contracts allow you to add SIMs at any time during the term, on the same per-SIM rate. Removing SIMs mid-contract is usually possible too but typically incurs early termination fees on the cancelled lines, equivalent to the remaining contract value. A good broker can often negotiate a “flex” clause that lets you reduce your headcount by up to 10-20% with no penalty.
Not by default – SIM-only is just airtime. If you want device protection you need to either insure handsets through a third-party business insurance product (often the cheapest), use the manufacturer warranty (e.g. AppleCare for Business), or arrange device protection through your finance partner if the handsets are leased rather than owned.
Whole-of-market quote across EE, Vodafone, O2 and Three. Same-day callback. No obligation, no pushy sales call.
Or call 0333 358 3008
Business SIM-only deals are not just for tech-savvy SMEs or BYOD startups. They are now the default cost-effective option for any UK business with 5+ SIMs and serviceable handsets. The savings versus a bundled “phone + airtime” deal are too large to ignore – typically 30-60% per user per month, every month, for the next 24 months.
The networks will not volunteer this saving. They make far more margin on bundled deals than on pure SIM-only contracts. The only way to access genuine business SIM-only pricing is to either go direct as an enterprise customer (which is hard work below 100 SIMs) or use a broker who quotes across all four networks at once and holds the wholesale relationships you cannot.
Send us your latest invoice using the form above and we will show you exactly what your business should be paying in 2026 – same working day, no obligation.
Read one of our other resources to help you get the best telecoms and IT solutions for your business
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