Comparing business SIM prices across all four UK networks is the fastest way to find out if you’re overpaying. This guide provides side-by-side pricing for every major data tier — from 1GB to unlimited — so you can see exactly where the best value sits for your specific usage needs.
Business SIM Prices: Full Comparison Table
| Data | EE | O2 | Three | Vodafone | Cheapest |
|---|---|---|---|---|---|
| 1GB | — | £6.50 | — | — | O2 |
| 5GB | £7.20 | £7.00 | £6.00 | £7.00 | Three |
| 10GB | £8.40 | £8.50 | £7.00 | £8.00 | Three |
| 25GB | £11.00 | £10.50 | £9.00 | £10.00 | Three |
| 50GB | £14.00 | £12.50 | £10.00 | £12.00 | Three |
| Unlimited | £16.00 | £14.00 | £12.00 | £15.00 | Three |
Prices shown are pre-VAT monthly costs on 24-month contracts. Actual prices vary by volume and negotiation. Multi-line discounts reduce these further.
After VAT Recovery: The Real Cost
Every price above drops by 20% for VAT-registered businesses. Here’s what the most popular data tiers actually cost:
| Data Tier | Cheapest (Three) | After VAT | With 15% Multi-Line Discount |
|---|---|---|---|
| 5GB | £6.00 | £5.00 | £4.25/mo |
| 10GB | £7.00 | £5.83 | £4.96/mo |
| Unlimited | £12.00 | £10.00 | £8.50/mo |
Price Isn’t Everything: What Else to Compare
Coverage
The cheapest SIM is worthless if the network has poor signal at your locations. Three is cheapest but has the smallest coverage footprint. EE costs more but covers 99% of the UK. Always check coverage at your postcodes before choosing on price alone.
Contract Length
Prices above are for 24-month contracts. 12-month terms cost £1–2/month more but offer earlier exit and renegotiation. 30-day rolling costs £2–4/month more but provides maximum flexibility — useful for temporary staff or testing a new network.
Annual Price Increases
Most networks apply CPI/RPI-linked annual increases each April. A £10/month SIM might be £10.70 by year two. Over 24 months, this adds 3–5% to the total cost beyond the advertised rate. Price-locked contracts are available from some providers at a slight premium — ask your broker.
EU Roaming
EE, O2, and Vodafone include EU roaming on most business plans. Three charges £2/day. If your team travels in Europe, this daily charge across multiple employees and trips can significantly affect the total cost comparison — potentially making Three’s price advantage disappear.
Support Quality
EE offers the longest business support hours (7am–9pm). Three has the most limited (8am–6pm). Through an independent broker, support quality is consistent regardless of network because your account manager handles all issues directly.
How to Get Prices Below the Table
The prices above are standard published rates. Here’s how businesses get even lower:
Multi-Line Discounts
Ordering 3+ SIMs together triggers volume discounts: 10–15% for 3–9 lines, 15–20% for 10–24 lines, 20–30% for 25+ lines. These are negotiated, not automatic — you need to ask or use a broker who negotiates them as standard.
Broker-Negotiated Rates
Independent brokers place thousands of SIMs across all four networks, giving them volume leverage that individual businesses can’t match. Typical broker pricing is 5–15% below the rates shown above — and the service costs you nothing (brokers are paid by the network).
End-of-Quarter Deals
Network sales teams have quarterly targets. Approaching in the last two weeks of March, June, September, or December often yields better pricing as teams push to hit numbers.
Get a personalised SIM price comparison — 60 seconds, all networks, broker-negotiated rates
Understanding Business SIM Pricing: What Drives the Cost?
Business SIM pricing in the UK isn’t arbitrary. Several factors determine what you’ll pay per line, and understanding them puts you in a stronger negotiating position. Whether you’re comparing prices online or working with a broker, knowing what moves the dial helps you secure a better deal.
Data Allowance — The Biggest Price Driver
Data is the single most significant factor in SIM pricing. The jump from 1GB to 5GB might add £2–3/month, but the jump from 10GB to unlimited adds £4–8/month. The networks price data tiers strategically to nudge businesses toward mid-range plans where their margins are highest. The sweet spot for value in 2026 is typically the 10–20GB range, where price-per-GB is lowest. Below 5GB, you’re paying a premium per gigabyte. Above 20GB, the cost barely differs from unlimited — so jumping to unlimited often makes more financial sense.
Contract Length — Time Equals Savings
Longer commitments mean lower monthly prices. The typical discount structure looks like this:
| Contract Length | Typical Price (10GB) | Discount vs Rolling |
|---|---|---|
| 30-Day Rolling | £14–16/mo | Baseline |
| 12 Months | £10–13/mo | 15–25% saving |
| 24 Months | £8–11/mo | 25–40% saving |
| 36 Months | £7–10/mo | 30–45% saving |
For most businesses, 24 months strikes the right balance. 36-month contracts lock you in too long in a rapidly changing market, while 12-month terms cost more per month but suit businesses with uncertain headcount.
Volume — More Lines Mean Lower Prices
Every network offers tiered volume discounts for business SIM orders. The breakpoints vary, but the general structure across EE, Three, Vodafone, and O2 follows a consistent pattern:
- 1–2 lines: Standard published pricing, minimal negotiation room
- 3–9 lines: 10–15% discount from list price — this is where broker negotiation starts delivering real value
- 10–24 lines: 15–25% discount, plus the ability to negotiate custom data tiers and mix different allowances across lines
- 25–49 lines: 20–30% discount with dedicated account management and bespoke terms
- 50+ lines: 25–40% discount with enterprise-level pricing and SLAs
Even if your business only has three lines, you cross the first volume threshold. This is one reason why consolidating all your business mobiles onto a single account (rather than having individual consumer contracts) immediately saves money.
Real-World Price Comparisons: What Businesses Actually Pay
Published list prices are useful as benchmarks, but they rarely reflect what businesses actually pay. Here are realistic price scenarios based on typical broker-negotiated deals in Q1–Q2 2026:
Scenario 1: Sole Trader or Freelancer (1 Line)
A self-employed consultant needing a single business SIM with 10GB data on a 24-month contract. Expected price: £8–10/month from Three or Vodafone, £10–12/month from EE. After VAT recovery, effective cost: £6.67–10/month. Even with just one line, a business contract saves money versus consumer after tax benefits.
Scenario 2: Small Office Team (5 Lines)
A professional services firm with five staff, each needing 10–20GB. Broker-negotiated pricing on 24-month contracts: £8–10/month per line (£40–50/month total). After VAT recovery: £33–42/month. Annual cost: £400–500. A consumer equivalent would cost £60–75/month before tax — nearly double.
Scenario 3: Growing Business (15 Lines, Mixed Data)
A construction company with 5 office staff on 5GB plans, 8 site workers on unlimited data, and 2 directors on premium unlimited plans. Broker-negotiated pricing:
- 5 × 5GB at £6/mo = £30/mo
- 8 × Unlimited at £12/mo = £96/mo
- 2 × Premium Unlimited at £18/mo = £36/mo
- Total: £162/month (£135 after VAT recovery)
Annual cost: £1,620 — for 15 fully-managed business mobile lines. That’s £108/line/year, or £9/line/month average. Achieving this kind of pricing requires volume negotiation through a specialist broker.
The Price Comparison Trap: Why Online Deals Aren’t Always the Cheapest
Searching “cheap business SIM deals” online and signing up for the first attractive offer is tempting but usually suboptimal. Here’s why the direct online channel rarely delivers the best business pricing:
Network Websites Show Consumer-Grade Pricing
The prices you see on EE, Three, Vodafone, and O2’s business web pages are their standard published rates — equivalent to a car’s sticker price. Nobody in the motor trade pays sticker price, and nobody in business telecoms should pay list price either. Broker-negotiated rates are typically 5–20% below what you see online.
Comparison Sites Have Blind Spots
Consumer comparison sites like uSwitch and Compare the Market focus primarily on consumer deals. Their business SIM sections are limited and often outdated. They also can’t account for volume discounts, bespoke configurations, or the specific needs of your business. A comparison site might show you the cheapest single-line price, but it can’t negotiate a fleet deal.
Direct Sales Teams Have Commission Targets
Network sales representatives earn commission on the revenue they generate. Their incentive is to sell you the most expensive plan they can justify, not to find you the most cost-effective solution. An independent broker’s incentive is aligned with yours — winning your business by finding genuinely competitive pricing across all networks.
Save Time and Money
Instead of spending hours visiting four network websites and comparing plans manually, get all four networks compared in a single broker quote. It takes 60 seconds and the service is free — brokers are paid by the network, not by you. Request your free personalised comparison now.
Frequently Asked Questions
Are these prices negotiable?
Yes. Published business SIM prices are starting points. Volume discounts, broker negotiation, and competitive quoting all reduce prices further. The more lines you order and the more networks you compare, the better your final price will be.
Can I mix different data allowances on one account?
Absolutely. Business accounts let you have different plans per line — 5GB for office staff, unlimited for field workers — all on one consolidated invoice. This flexibility is one of the main advantages over consumer contracts.
How often do business SIM prices change?
Networks update their business pricing quarterly, with major changes typically in January and July. However, the biggest factor in your price isn’t the list rate — it’s how well you (or your broker) negotiate. Market rates trend downward over time as networks compete for business customers.
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