Can You Claim a Business Mobile Phone as a Tax Expense?

Published: 23 February 2026 • Compare The Networks

If you use a mobile phone for business, you may be able to claim the cost as a tax-deductible expense -- potentially saving you hundreds of pounds each year. But the rules differ depending on whether you are a sole trader, a limited company director, or part of a partnership. This guide breaks down exactly what you can claim, how to handle personal use, and how to reclaim VAT on your business mobile.

Who Can Claim Business Mobile Phone Expenses?

Any UK business that uses a mobile phone for work purposes can potentially claim the cost against tax. However, HMRC applies different rules depending on your business structure:

• Sole traders -- claim the business-use proportion of your mobile costs on your Self Assessment tax return
• Limited companies -- the company can claim the full cost of a contract taken out in the company name, provided any personal use is incidental
• Partnerships -- similar to sole traders; each partner claims their share of business-use costs
• Employers providing phones to staff -- one mobile phone per employee is a tax-free benefit if provided mainly for business use

HMRC Rules for Sole Traders

As a sole trader, you cannot claim the entire cost of a mobile phone contract if you also use the phone for personal calls, texts, and data. HMRC requires you to split costs between business and personal use.

How to Calculate the Business-Use Percentage

There is no single method mandated by HMRC, but the most common approaches are:

1. Itemised bill review -- go through one or two months of bills, categorise each call and text as business or personal, and work out the percentage. Apply this to the full year.
2. Reasonable estimate -- if your usage pattern is consistent, HMRC accepts a reasonable estimate. For instance, if you use the phone roughly 70% for business, you could claim 70% of the monthly contract cost.
3. Two separate contracts -- the simplest approach is to have a dedicated business mobile on its own contract. You can then claim 100% of that contract.

Tip HMRC rarely questions a 50/50 split, but if you claim more than 75% business use on a personal phone, make sure you can back it up with itemised bills.

What Sole Traders Can Claim

• Monthly contract or pay-as-you-go costs (business proportion)
• The cost of the handset (business proportion) -- either as a one-off expense or spread over the contract
• Business calls and texts over and above your allowance
• Roaming charges incurred on business trips
• Insurance if the phone is used for business

HMRC Rules for Limited Companies

Limited companies benefit from more generous rules. If the mobile phone contract is in the company's name, the business can claim:

• 100% of the monthly contract cost
• 100% of the handset cost (as a business asset)
• All business-related add-ons, bolt-ons, and roaming charges

The key requirement is that the phone must be provided primarily for business use. Incidental personal use is permitted and does not create a benefit-in-kind (BIK) tax charge -- provided only one phone is supplied per employee.

Tip If your company provides a second mobile phone to the same employee, the second device will be treated as a taxable benefit.

The Employer-Provided Mobile Phone Exemption

Under ITEPA 2003, Section 319, one mobile phone per employee is exempt from tax and National Insurance if:

• The contract is in the employer's (company's) name
• The phone is provided mainly for business use
• It is limited to one phone per employee

This makes limited company contracts exceptionally tax-efficient. A director with a company mobile on a £40/month contract saves approximately £96 per year in personal tax (at 20% basic rate) compared to paying for the same contract personally.

Worked Examples: How Much Can You Save?

For a small business with five handsets, the combined tax relief and VAT reclaim can easily exceed £500 per year. Scale that to 20 or 50 devices and the savings become substantial.

Reclaiming VAT on Business Mobiles

If you are VAT-registered, you can reclaim the VAT on your business mobile costs. The rules are straightforward but depend on your setup:

Contract in the Business Name

If the contract is in your business or company name, you can reclaim 100% of the VAT on the full contract cost, including the handset element. This applies even if there is some incidental personal use.

Contract in Your Personal Name

If the contract is in your personal name, you may only reclaim the VAT on calls that are identifiably for business. You cannot reclaim VAT on the line rental or monthly charge. This makes personal-name contracts far less tax-efficient.

How to Reclaim

1. Ensure your mobile contract is in your business or company name
2. Keep all invoices -- your network provider should issue VAT invoices monthly
3. Include the VAT amount on your quarterly VAT return (Box 4)
4. If mixed use, only claim the business proportion of VAT

Tip Most business mobile contracts from EE, Vodafone, O2, and Three automatically provide VAT invoices via your online account. Download these monthly and store them with your records.

What Records Should You Keep?

HMRC may request evidence to support your claim. Keep the following for at least six years:

• Monthly invoices from your network provider (showing VAT)
• Itemised bills for at least two sample months per year (to justify your business-use percentage)
• The contract itself showing whether it is in your name or the company's name
• A record of how you calculated the split between business and personal use
• Evidence of business calls -- diary entries, client records, or CRM logs that correspond to calls on your bill

Common Mistakes to Avoid

• Claiming 100% on a personal phone -- unless you genuinely never make personal calls, HMRC will not accept a 100% business claim on a sole trader's only phone
• Contract in wrong name -- a limited company director claiming company tax relief on a contract in their personal name is a common error. Always put the contract in the company name.
• Forgetting to claim the handset -- the phone itself is an allowable expense, not just the monthly charges
• Not keeping invoices -- without VAT invoices, you cannot reclaim VAT, even if you are registered
• Claiming two phones per employee -- only one employer-provided phone per employee is tax-exempt

Partnerships and Multiple Owners

In a partnership, mobile phone expenses are handled similarly to sole traders. Each partner claims the business-use portion of their own phone costs through the partnership's Self Assessment return. If the partnership provides phones to partners, the cost is a deductible business expense for the partnership, but each partner must declare any personal-use benefit.

Capital Allowances on Expensive Handsets

If you purchase a high-end handset outright (for example, an iPhone 16 Pro Max at £1,199), you can claim this through the Annual Investment Allowance (AIA). For sole traders and partnerships, remember to apply your business-use percentage. Limited companies can claim the full amount if the phone is a company asset.

With the AIA currently set at £1,000,000, virtually all business mobile purchases will qualify for immediate 100% write-off in the year of purchase.