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How Do Business Mobiles Work? Contracts, Billing, Tax & Setup Explained

How business mobile contracts and billing work

If you’ve always used personal phone contracts, the world of business mobiles can seem confusing. Different billing, VAT rules, fleet management, spend caps — it’s a lot. This guide breaks down exactly how business mobile contracts work in the UK so you can make an informed decision.

Business Mobile Contracts: The Basics

A business mobile contract works much like a personal one, but with key differences designed for companies:

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  • The contract is in your company name — not a personal name
  • Billing goes to the business with proper VAT invoices
  • You can manage multiple lines from one account
  • Multi-line discounts reduce the per-handset cost
  • Credit checks are run against the business (Companies House), not your personal credit

SIM Only vs Handset Contracts

You have two main options:

SIM Only (From £6/month)

You keep your existing phone and just get a business SIM. This is cheaper and more flexible — contracts are often 30 days or 12 months. Ideal if your team already has handsets.

Handset + Plan (From £20/month)

The network provides a new handset bundled with your airtime. Contracts are typically 24-36 months. The full cost of the handset is spread across the contract term. The handset element is also a tax-deductible business expense.

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How Business Mobile Billing Works

Business billing is simpler than you’d think:

  • One consolidated bill for all your lines — no chasing individual receipts
  • Line-by-line breakdown showing usage per employee
  • Proper VAT invoices suitable for your accountant and HMRC
  • Spend caps to prevent bill shock from data overuse or roaming

Keeping Your Existing Numbers

You don’t lose your phone numbers when switching. The PAC code process lets you port any UK mobile number to your new business contract. It takes 1 working day and is completely free.

Setting Up a Business Mobile Fleet

Whether you’re setting up 2 phones or 200, the process is straightforward:

  1. Audit your current usage — data, minutes, texts per user
  2. Choose the right network — based on coverage at your locations
  3. Select plans — mix of SIM only and handset contracts to suit each role
  4. Port numbers — request PAC codes from current providers
  5. Set up managementMDM, spend caps, and usage policies
  6. Activate and distribute — your provider handles provisioning

Business Mobile Tax Benefits

The financial benefits of business mobiles are significant:

  • 100% VAT recovery on all airtime and rental charges
  • Corporation Tax deduction — mobile costs reduce taxable profits
  • Capital allowance on handset purchases
  • No BIK tax — HMRC doesn’t treat a business mobile as a benefit-in-kind (one phone per employee)
Important: To claim these benefits, the contract must be in the company name — not the employee’s personal name. Read our full guide on buying phones through your business.

Get Started

Setting up business mobiles doesn’t have to be complicated. Get a free quote and we’ll handle everything — from plan selection and number porting to device setup and ongoing support.

Written by
Sales Manager

Scott is an experienced Sales Manager at Connection Technologies, leading high-performing teams to deliver consistent year-on-year growth.

Business MobilesTelecoms SolutionsAccount Management
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