The UK's mobile phone exemption under section 319 ITEPA 2003 is one of the most widely used employer benefits. The first mobile phone per employee is completely exempt from benefit in kind — there is no income tax and no NIC regardless of private use — provided the contract is in the employer's name. Any additional phones are fully taxable.
This calculator determines how many exempt phones you have, the taxable value of any additional phones, the resulting income tax, and the employer's Class 1A NIC. It also flags the most common mistake: contracts in the employee's name, which are not exempt and create PAYE/NIC liabilities.
Mobile Phone Exemption — Key Rules 2025/26
- First phone: fully exempt — no BIK, no NIC, no P11D reporting needed
- Applies to: handset contracts AND SIM-only contracts
- Condition: contract must be in the employer's name
- Private use of exempt phone: unlimited — does not affect the exemption
- Second and further phones: fully taxable at annual contract cost
- Phone in employee's name reimbursed by employer: taxable as earnings (Class 1 NIC applies)
- Employer Class 1A NIC on taxable phones: 13.8%
Mobile Phone BIK Calculator
Enter the number of phones provided by your employer and the annual cost of each additional phone beyond the first.
Important: The exemption only applies when the contract is in the employer's name. If the employer reimburses bills for a phone in the employee's name, this is treated as earnings — not a BIK — and attracts Class 1 NIC (both employer and employee) as well as income tax through payroll.
The One-Phone Exemption Explained
Section 319 ITEPA 2003 provides a complete exemption from benefit in kind for one mobile phone provided to an employee by their employer. The exemption covers:
- Handset contracts (combined monthly plans)
- SIM-only plans
- Pay-as-you-go arrangements where the employer provides the SIM
- Any amount of private use — the exemption is not restricted to business use
This is one of the few employee benefits where unlimited private use does not create a proportional tax charge. An employee can use their exempt work phone for personal calls, streaming, social media, and other personal activities without any part of the phone's value becoming taxable.
The exemption is per employer — not per employee. If you work for two separate employers and each provides you with one mobile phone in their own name, both phones are exempt. However, if your single employer provides you with two phones, only the first is exempt.
Critical Requirement: Contract in Employer's Name
The single most important condition for the mobile phone exemption is that the contract must be in the employer's name. This is not a technicality — it is a core statutory requirement.
| Arrangement | Contract owner | Tax treatment | NIC type |
|---|---|---|---|
| Employer provides phone on its contract | Employer | Exempt (1 phone) / BIK (2+ phones) | Class 1A on taxable phones only |
| Employee has own contract, employer reimburses bills | Employee | Fully taxable earnings | Class 1 (both employer + employee) |
| Employer provides allowance to buy own phone | N/A (cash) | Fully taxable earnings | Class 1 (both employer + employee) |
| Second employer phone on employer's contract | Employer | Fully taxable BIK | Class 1A (employer only) |
Where the employer reimburses a phone in the employee's name, this is treated as a payment of earnings — not a benefit in kind. The difference matters for NIC: earnings attract Class 1 NIC from both the employer and the employee, while a BIK attracts only employer Class 1A NIC. Misclassifying reimbursements as exempt benefits in kind can create unexpected NIC liabilities.
Taxable Second and Additional Phones
Any phone beyond the first — whether a handset contract, SIM-only plan, or additional device — is fully chargeable as a benefit in kind. The taxable value is the annual cost of the contract or plan.
For a handset contract, HMRC typically treats the total contract cost as the taxable value (the line rental element plus the handset finance element are not separated). For a SIM-only contract, the annual plan cost is the taxable value.
The benefit for each additional phone must be reported on form P11D. Employer Class 1A NIC is payable on the total chargeable benefit of all additional phones. There is no employee NIC — benefits in kind are not subject to Class 1 NIC.
Frequently Asked Questions
Is an employer-provided mobile phone taxable?
The first mobile phone provided by an employer is exempt from benefit in kind under section 319 ITEPA 2003, provided the contract is in the employer's name and the phone is given directly to the employee (not a cash equivalent). Any second or additional phone is fully taxable.
Does the mobile phone exemption apply to SIM-only contracts?
Yes. The exemption applies to both handset contracts and SIM-only contracts. The key requirement is that the contract must be in the employer's name. A SIM-only contract in the employer's name and provided to the employee is treated as a qualifying mobile phone for the first device.
What if the contract is in the employee's name?
If the phone contract is in the employee's name and the employer pays or reimburses the bills, the exemption does not apply. The reimbursement is treated as earnings and is subject to both income tax and Class 1 NIC — not Class 1A NIC as for standard BIK.
Are second and additional phones always fully taxable?
Yes. Only the first mobile phone per employee can benefit from the exemption. Any second, third, or further phones provided by the same employer are fully taxable as benefits in kind at the annual contract cost.
What is the taxable value of a second employer phone?
The taxable value is the annual cost of the contract or handset. For a SIM-only contract, it is the annual plan cost. For a handset contract, it is the full annual value including both the service element and the handset element.
Can an employee use a work phone for private calls without creating a BIK?
Yes. Provided the phone qualifies for the first-phone exemption (contract in employer's name, one phone per employee), there is no BIK even if the employee makes extensive private calls. The private use does not affect the exemption for the first qualifying phone.
What National Insurance applies to mobile phone benefits?
For taxable phones (second phone onwards), the employer pays Class 1A NIC at 13.8% on the annual benefit value. There is no employee Class 1 NIC. If the employer reimburses a phone in the employee's name, Class 1 NIC applies to both employer and employee.
Does the mobile phone exemption apply to tablets and laptops?
No. The mobile phone exemption under section 319 ITEPA 2003 applies specifically to mobile phones. Tablets, laptops, and similar devices are subject to the standard 20% asset use rule and do not benefit from the one-phone exemption.
What if an employer gives an employee a cash allowance to buy a phone?
A cash allowance to buy a personal phone is earnings, not a benefit in kind. It is taxable as income and subject to Class 1 NIC. The mobile phone exemption requires the employer to provide the phone directly — it does not extend to cash in lieu.
Can two separate employers each provide an exempt phone?
Yes. The exemption is per employer, not per employee. If an employee has two separate employerships, each employer can provide one exempt mobile phone. The employee would have two exempt phones in total.
What if the employer provides a phone for a family member?
The mobile phone exemption applies to phones provided to the employee. If the employer provides a phone to a family member or associate of the employee (not the employee themselves), the full value is taxable as a benefit and the exemption does not apply.
How is the mobile phone benefit reported on P11D?
Only taxable phones (second phone onwards, or phones in employee's name reimbursed by employer) need to be reported on P11D. Exempt first phones do not need to be reported. The annual contract cost is the value to declare for taxable phones.
Has the mobile phone exemption changed recently?
The mobile phone exemption under section 319 ITEPA 2003 has remained broadly the same since it was introduced. The key conditions — employer's name, one phone per employee, no cash alternative — have not materially changed. The exemption applies regardless of the phone's value or contract cost.