Published: 3 March 2026 • Compare The Networks
If your business needs more than one mobile line, you’re leaving money on the table by ordering individual contracts. Multi-SIM business mobile deals offer volume discounts of up to 40% compared to single-line pricing — plus centralised billing, shared data pools, and fleet management tools that make running a team of phones far simpler. Whether you have 5 employees or 500, multi-line deals will save your business significant money.
This guide explains how multi-SIM deals work, what discounts you can expect at different volume tiers, and how to manage multiple lines without losing control of your mobile spend.
How Multi-SIM Business Deals Work
A multi-SIM deal is simply a business mobile contract that covers multiple lines under a single account. Instead of each employee having a separate contract with separate billing, everything is consolidated. The more lines you add, the bigger the discount per line.
Here’s what you typically get with a multi-SIM deal:
- Volume discounts — Lower per-line costs as you add more SIMs
- Centralised billing — One invoice for all lines, making expense management and VAT reclaim straightforward
- Shared data pools — Some plans let your team share a single data allowance, so heavy users can borrow from light users
- Fleet management — Add, remove, or swap SIMs as staff join or leave
- MDM (Mobile Device Management) — Enterprise-grade controls for security, app management, and device tracking
- Single point of contact — One account manager for all your lines
Volume Discounts by Number of Lines
The more lines you commit to, the bigger the per-line discount. Here’s a typical pricing breakdown for SIM only deals with 20GB data per line:
| Number of Lines | Typical Per-Line Cost | Saving vs Single Line | Total Monthly Cost |
|---|---|---|---|
| 1 line (single) | £10/mo | — | £10/mo |
| 5–9 lines | £8.50/mo | 15% saving | £42.50–£76.50/mo |
| 10–24 lines | £7.50/mo | 25% saving | £75–£180/mo |
| 25–49 lines | £6.50/mo | 35% saving | £162.50–£318.50/mo |
| 50+ lines | £6.00/mo | Up to 40% saving | From £300/mo |
Note: Exact pricing varies by network, data allowance, and contract length. These are indicative rates — contact us for a bespoke quote for your business. All tariffs include annual CPI + 3.9% price increases.
Shared Data Pools vs Individual Allowances
When setting up multi-SIM deals, you’ll choose between shared data and individual allowances. Each has its place:
| Feature | Shared Data Pool | Individual Allowances |
|---|---|---|
| How it works | One large data pot shared across all SIMs | Each SIM gets its own data allowance |
| Best for | Teams with varied data usage | Teams with consistent, predictable usage |
| Cost efficiency | Higher — no wasted data from light users | Lower — unused data on individual SIMs is lost |
| Management | Need to monitor for heavy users hogging the pool | Simpler — each user manages their own limit |
| Overage risk | One heavy user can exhaust the pool for everyone | Overages contained to individual SIMs |
For most businesses, shared data pools offer better value. If one employee barely uses data while another is constantly on the road streaming maps and video calls, the pool balances itself out. Fleet mobile deals often include shared data as standard.
Centralised Billing & Expense Management
One of the biggest headaches with individual mobile contracts is tracking expenses. Each employee submits their own bill, you reconcile them, and VAT reclaim becomes a spreadsheet nightmare. Multi-SIM deals solve this entirely.
With centralised billing you get:
- One monthly invoice for all lines — itemised by user, department, or cost centre
- Automatic VAT breakdown — reclaim the full 20% on all lines with a single invoice
- Spend alerts — Set limits on individual SIMs to prevent bill shock from roaming or premium calls
- Online management portal — Add or remove SIMs, swap plans, and view usage in real time
- Simplified accounting — One line item in your accounts instead of dozens. See our tips on business mobile expense management
Fleet SIM Management: Adding, Removing & Swapping Lines
Businesses aren’t static. Staff join, staff leave, roles change. Fleet SIM management lets you handle all of this without calling the network every time:
- New starter? Activate a new SIM on your account in minutes, not days
- Employee leaving? Deactivate their SIM and reassign the number or device
- Role change? Upgrade or downgrade an individual SIM’s data allowance without affecting other lines
- Lost or stolen device? Remote-wipe the device and suspend the SIM immediately via MDM
- Seasonal staff? Activate SIMs for busy periods and suspend them when not needed
This flexibility is especially valuable for businesses with field teams, delivery drivers, or sales reps who need reliable mobile connectivity across the UK.
MDM: Mobile Device Management for Security
Once you’re managing 10+ business mobiles, security becomes critical. Mobile Device Management (MDM) software gives you centralised control over every device on your account:
- Enforce passcodes and encryption on all devices
- Remotely wipe lost or stolen devices to protect business data
- Control which apps can be installed (block social media, games, etc.)
- Push software updates and security patches to all devices simultaneously
- Track device locations for field teams (with employee consent)
- Separate business and personal data on BYOD (Bring Your Own Device) setups
Many multi-line deals include basic MDM at no extra cost. For advanced features, dedicated MDM solutions are available as add-ons.
How to Get Multi-SIM Deals Through Compare The Networks
Getting a business mobile deal for multiple lines is straightforward:
- Tell us how many lines you need — even a rough estimate helps us get you the best volume tier pricing
- Choose SIM only or handsets — SIM only from £6/mo per line, handset deals from £15/mo per line
- We negotiate with all major networks — EE, Three, Vodafone, O2, and more — to get you the best multi-line rate
- Keep your numbers — Every employee texts PAC to 65075 and we handle the rest. Numbers transfer within 1 working day
- One account, one bill — Everything managed through a single business account
Get a Multi-SIM Quote for Your Team
Tell us how many lines you need and we’ll come back with the best multi-SIM deals from all major networks. Volume discounts of up to 40% available on 5+ lines.
Get a Multi-SIM QuoteAll prices shown exclude VAT. Annual CPI + 3.9% price increases apply to all tariffs. Compare The Networks is regulated by OFCOM.
Q: What’s the minimum number of lines for a multi-SIM discount?
Most networks start offering volume discounts from 5 lines. However, even with 2–4 lines you may get a small discount compared to individual contracts. Contact us with your requirements and we’ll negotiate the best rate regardless of your team size.
Q: Can we mix SIM only and handset contracts on the same account?
Yes. Multi-SIM accounts are flexible — some employees can have SIM only deals while others have handset contracts. Everything still appears on one centralised bill.
Q: Do multi-SIM deals require a credit check?
A single credit check is typically run on the business (not individual employees). For SIM only multi-line deals, no credit check is required. Handset deals may require a business credit check depending on the number of lines and total contract value.
Q: Can we add or remove lines mid-contract?
Yes. Most fleet SIM deals allow you to add new lines at any time (at the same per-line rate) and remove lines at the end of their individual minimum terms. Speak to your account manager about the specific flexibility built into your deal.