Company mobile phones for employees are a policy decision disguised as a purchasing one. The real choice is between three models — company-provided phones, bring-your-own-device (BYOD), or a phone allowance — and the right answer depends on security, tax and how your team actually works. This guide walks UK employers through all three for 2026, with a practical policy checklist, and how to price the company-phone route using business mobile contracts.
The three models compared
| Company phone | BYOD (own device) | Phone allowance | |
|---|---|---|---|
| Who owns the device | The company | The employee | The employee |
| Upfront cost to employer | Highest (or £0-upfront contracts) | None | None |
| Tax treatment | Exempt benefit (one phone per employee, company contract) | No benefit; limited expense claims | Usually taxable pay |
| Security control | Full — MDM, remote wipe, app control | Partial — needs consent and policy | Minimal |
| Number ownership | Company keeps the number when staff leave | Employee keeps it — and sometimes the clients | Employee keeps it |
| Best for | Customer-facing and field teams, regulated work | Occasional email access | Rarely the best option |
Company mobile phones for employees: the case for providing devices
Tax: the exempt-benefit advantage
One mobile phone per employee, on a contract in the company’s name, is exempt from benefit-in-kind tax — private use included. There is nothing to report on a P11D for that phone, the cost is deductible for corporation tax, and VAT-registered businesses can generally reclaim the VAT. Directors get the same treatment — the details are in our guide to claiming mobile phone expenses through a limited company.
Contrast that with a cash phone allowance, which is normally just taxable pay — the employee loses income tax and National Insurance on it, and you pay employer’s NI. Allowances are usually the worst of both worlds: real cost, no control.
Security and control
Company-owned devices can be enrolled in mobile device management from day one. That means enforced screen locks and encryption, separated work profiles, app controls and remote wipe when a phone is lost or an employee leaves. Our MDM guide covers the options; the short version is that control is dramatically simpler on hardware you own.
Continuity
The overlooked benefit: the company keeps the number. When a salesperson moves on, their pipeline keeps ringing a phone you control — not their personal SIM. For customer-facing roles this alone can justify the cost.
BYOD: when letting staff use their own phones works
BYOD suits businesses where phone use is light — reading email, the odd call, two-factor codes. The savings are real (no hardware, no airtime), but they come with conditions:
- You need a written BYOD policy — covering security requirements, what happens on exit, and what the business can and cannot see on a personal device. Our BYOD policy guide includes the full framework.
- Security is negotiated, not imposed — you cannot simply wipe an employee’s personal phone; work-profile containers are the usual compromise
- Compliance gets harder — client data on personal devices raises UK GDPR questions, and schemes like Cyber Essentials expect BYOD devices to meet the same controls as corporate ones
- Expenses are limited — reimbursing an employee’s personal contract is generally taxable, so BYOD saves most when you don’t reimburse at all
Phone allowances: usually the weakest option
A monthly cash allowance feels simple, but it is normally treated as earnings — taxed through payroll like salary. You get no MDM, no number ownership and no VAT reclaim, while still paying out every month. Allowances make sense mainly as a transitional arrangement or where a collective agreement requires them.
What company phones actually cost in 2026
The numbers are lower than most employers expect:
- SIM-only: business SIMs from around £5–£10/user/month — pair with staff’s existing or refurbished handsets
- Handset included: mid-range Android from roughly £15–£30/user/month with £0 upfront; flagships more
- Pooled/shared data: multi-line plans share data across the team, so light users subsidise heavy ones
- Spend caps: cap out-of-bundle charges per line to prevent bill shock — see our spend cap guide
For team-size-specific pricing, our fleet pricing guide (5–50 lines) breaks down what UK businesses pay per head at each tier.
Company phone policy: what to put in writing
Whichever model you choose, write it down. A one-page policy prevents most disputes. Cover these points:
Provision and eligibility
- Which roles get a company phone, and the standard handset tier per role
- Whether reasonable personal use is permitted (for tax purposes under the exemption, it can be)
- Who pays for accessories, repairs and replacements
Security requirements
- MDM enrolment is mandatory before the device receives company data
- Screen lock, encryption and OS updates enforced; jailbroken/rooted devices barred
- Lost or stolen devices reported within a set time — pair the policy with our lost/stolen phone action plan
Acceptable use and monitoring
- What the company monitors (usage and costs, device compliance) and what it does not (personal content)
- Roaming rules for travel, and premium-rate/content restrictions
Exit process
- Devices and SIMs returned on the last day; numbers stay with the company
- Remote wipe executed on unreturned devices; personal data backup is the employee’s responsibility before return
Rolling out company phones: a five-step checklist
If you decide to provide devices, the rollout is straightforward when done in order:
- 1. Map the roles. List who genuinely needs a device, and at what tier — most teams split cleanly into “flagship” (client-facing seniors), “mid-range” (field staff) and “SIM-only” (existing handsets)
- 2. Put the contract in the company’s name. This single step is what unlocks the tax exemption, VAT invoices and central billing — a consumer account in a director’s name gets none of it
- 3. Enrol devices in MDM before handout. Retrofitting management onto phones already full of personal apps is ten times harder than enrolling clean devices
- 4. Issue the policy with the phone. Have each employee acknowledge the policy at handover — it’s the acknowledgement that makes the exit process enforceable later
- 5. Set spend caps and review quarterly. Caps per line stop bill shock; a quarterly usage review catches unused lines and data-plan mismatches before they compound
A 10-line fleet can go from decision to devices-in-hands in under two weeks, and number porting means nobody’s contacts change.
Making the decision
A simple rule of thumb for 2026: provide company phones to anyone customer-facing, field-based or handling sensitive data; allow BYOD for desk-based staff who only need email; avoid cash allowances unless you have a specific reason. Most SMEs land on a hybrid — a handful of company devices plus a BYOD policy for everyone else.
One last sizing note: the economics shift with headcount. At 1–5 staff, SIM-only company lines are so cheap that BYOD saves almost nothing. At 20+, pooled data and fleet discounts make company devices cheaper per head, while the compliance cost of BYOD grows. The businesses that regret their choice are usually the ones that let the decision happen by default rather than making it once, in writing.
We set up company phone fleets in the business’s name — which is what makes the tax exemption work — with pooled data, spend caps and MDM-ready devices from £6/user/month. Tell us your team size and we’ll price all three models against each other.
Get a quote: Business Mobiles or Hosted VoIP
Frequently Asked Questions
No — one mobile phone per employee, provided on a contract in the company’s name, is exempt from benefit-in-kind tax even with private use. A second phone for the same employee, or paying an employee’s personal contract, can be taxable.
A company phone is usually better value. Allowances are normally taxed as pay, give you no security control and leave the number with the employee. A company device is a tax-exempt benefit, can be managed with MDM, and the number stays with the business.
Yes, if your policy allows it — and it doesn’t affect the tax exemption, which covers private use on one company-provided phone per employee. Most employers permit reasonable personal use and rely on spend caps to control costs.
The device and number belong to the company. Best practice is return on the last day, remote wipe of unreturned devices via MDM, and reassigning the number so customer calls keep landing with your team. Put all of this in the policy before it’s needed.
Upfront, yes — there’s no hardware or airtime to buy. But BYOD shifts cost into security, compliance and admin: you’ll need a written policy, work-profile controls, and you lose the number when staff leave. For phone-heavy roles, business SIMs from around £5–£10/month often close the gap quickly.