Cheapest Business SIM Only Deals UK: Equip Your Team for Less

Equipping a team with phones doesn't require a business contract, a credit check or a 24-month commitment. Rolling 30-day business SIM only plans start from around £5 per user per month — and you can order one SIM per staff member, all free to post.

In this guide we'll compare the cheapest business SIM only deals for UK companies, show what a sensible per-user budget looks like, and explain how to deploy SIMs across a team without a procurement cycle. You can also compare providers on our business SIM cards page.

Why rolling SIMs beat business contracts

Traditional business mobile contracts bundle handsets, 24-month terms and per-user discounts that vanish the moment you need to shrink the fleet. Rolling SIM only plans flip that model:

• No credit check — new companies and sole traders can order on day one.
• Scale both ways — add SIMs for new starters, cancel the month someone leaves. No early termination fees.
• Mix and match — put office-based staff on £5-£8 plans and field staff on 20GB+ plans. You're not locked into a one-size-fits-all tariff.
• Same networks — Giffgaff runs on O2 and Lebara on Vodafone, so staff get the same coverage as premium business contracts.

Cheapest business SIM only deals compared

Prices are indicative and change over time — confirm current pricing on the network's site before ordering. For devices without a need for calls, see our business data SIMs guide.

What should each user get?

• Office/part-time staff (£5-£8): 2-5GB, unlimited calls and texts. Enough for email, calls and maps.
• Field staff, trades, delivery (£10-£15): 10-20GB with 5G. Covers navigation all day, job apps and video calls.
• Heavy users/hotspotting (£20-£35): unlimited data for anyone tethering a laptop or uploading from site.
• Devices without users (from ~£5): routers, card machines and trackers need data only — see our business data SIM guide.

How to deploy SIMs across a team

Because each SIM is independent, rolling out to a team takes under a week:

• Step 1: order one free SIM per staff member (there's no limit) — they arrive in 3-5 working days.
• Step 2: have each employee activate their SIM online and choose their plan.
• Step 3: staff keep their numbers by texting PAC to 65075 and giving the code to the new network — see our PAC code switching guide.
• Step 4: cancel each old contract individually. No bulk migration, no early termination fees.

Mistakes businesses make when cutting mobile costs

• Buying unlimited for everyone. Most office staff use under 5GB. Put heavy users on unlimited and everyone else on smaller plans.
• Signing 24-month contracts for flexibility. Teams change. Rolling plans let your mobile spend follow your headcount.
• Ignoring international calling. If staff call overseas clients, Lebara's included international minutes can save more than any headline discount.
• Forgetting roaming. Staff travelling to the EU need plans that include it — check our EU roaming guide.

Are cheap business SIMs reliable enough for work?

Yes — Lebara and Giffgaff use Vodafone's and O2's full national networks, so coverage and speeds match the parent networks' direct customers. The savings come from having no handsets, no shops and no contracts — not from a lesser service.

Final thoughts

The cheapest business SIM only deal is the one that matches each user's real usage. Start with Lebara at ~£5 per user for light users, Giffgaff goodybags for anyone whose needs change month to month, and unlimited for genuine heavy users. With no contracts, getting it slightly wrong costs you one month — not two years.