Can a UK sole trader claim a business mobile as a tax expense?

Yes. A mobile used 100% for business is a fully allowable expense against self-employment income. Keep the contract in your name with business use clearly evidenced. For mixed use on a personal mobile, you can only claim the business proportion (typically hard to justify above 50%).

Is a business mobile worth it over just using my personal phone?

For tradespeople, consultants, therapists, coaches and anyone public-facing: usually yes. You get a switch-off-at-7pm professional number, cleaner tax treatment (100% allowable), and often a lower monthly cost than your personal plan. For very low-volume work usage, personal phone is fine.

Should I put my business mobile in my own name or my trading name?

Sole traders: usually in your name with your trading name and address on the account. Limited companies: contract goes in the company name. Both work for tax purposes provided business use is evidenced.

Can I have two SIMs in one phone for business and personal?

Yes. Most modern iPhones and Samsung Galaxies support dual-SIM. CTN business SIM works alongside any personal SIM. Separate call logs, separate WhatsApp accounts, work SIM can be switched off out of hours.

Business Mobile for UK Sole Traders & Freelancers (2026): Is It Worth It?

Name: Compare The Networks
Address: Unit 3, Battlefield Enterprise Park, Shrewsbury, SY1 3FE, GB
Telephone: +441743598025
Price range: Free comparison service
Rating: 4.3

Last updated: April 2026

If you're a UK sole trader or freelancer, you're probably using your personal phone for work. Most people do. The question is whether that's actually saving you money, or quietly costing you in other ways.

Honest answer: for some sole traders it's fine. For others, a dedicated business mobile is either cheaper or pays for itself in other ways. Here's how to tell which you are.

When personal phone for work is fine

You take maybe 5-10 work calls a week and it's not a big part of your income
You'd never give the number out to clients who might WhatsApp you at 11pm on Sunday
Tax-wise: you're claiming some portion of your personal mobile against self-employment expenses (tough to justify more than 50% for most sole traders)
You don't need to look professional — clients found you through friends or word of mouth
You're just starting out and minimising overhead matters

If you're in this camp: keep your personal mobile, claim a portion against tax, move on.

When you should get a business mobile

You're a tradesperson (plumber, electrician, decorator, builder) — customers will call at all hours. Having a separate number you can switch off at 7pm matters.
You run any kind of service business with public-facing contact — consulting, coaching, therapy, creative services
You travel internationally for work — inclusive EU calls and roaming cost less than one surprise bill
Your personal number is already out there widely — you want a fresh, professional number clients use
You claim more than 50% of your personal phone cost as business expense — might as well have a dedicated line (cleaner for tax, HMRC-defensible)
You give out your number on a website, business cards, van livery — don't put your personal mobile on the internet permanently

The tax angle

This is where sole traders often miss value. HMRC's stance:

Personal mobile used for business: claim the "business proportion" as an expense. Tough to justify above 50% unless you can evidence it.
Dedicated business mobile: claim 100% of the cost as a business expense. Cleaner, fully evidenced, HMRC-defensible.

Example maths for a sole trader paying 20% basic-rate income tax:

Personal phone at £30/month, claiming 40% business: £12/month × 12 × 20% = £28.80/year tax saved
Business phone at £25/month, claiming 100%: £25/month × 12 × 20% = £60/year tax saved

Business phone also costs less per month (£25 vs £30) in this example. You're both spending less AND saving more tax. It's often not as close as people assume.

(If you're a higher-rate taxpayer or limited company, the maths is even more favourable.)

What a sole trader actually needs from a business mobile

1. A proper number

A UK business-looking number. Not a Skype VoIP number with strange area code. Not a Google Voice forwarding hack. A real UK mobile that rings in a van or workshop.

2. Good UK coverage

If you're on the road between customer sites (tradespeople, field service, consulting visits), coverage matters. EE strongest for rural; any network fine for urban.

3. Reasonable data allowance

Modern work — Google Maps, WhatsApp photos to customers, Xero or QuickBooks on mobile, invoicing apps, watching supplier YouTube how-to videos — runs through 5-10GB/month easily. 25GB tariff is comfortable for sole traders.

4. Optional: inclusive international

If you have overseas family or trade abroad, inclusive EU calls and roaming save money. Otherwise a standard UK-only plan is cheaper.

5. Terms that suit

Sole traders are sometimes wary of long terms. CTN's business tariffs are typically 36 months — if that doesn't suit, we'll be upfront and suggest alternatives.

Typical sole trader pricing

Tariff	Best for	Approx monthly (ex VAT)
25GB / UK only	Sole trader with no international travel	~£18-22/mo
25GB / 200 international	Sole trader with occasional EU work	~£22-26/mo
50GB / 500 international	Tradesperson / consultant with EU travel	~£24-28/mo

On 36-month terms.

The "I need two phones" question

Some sole traders go with two physical phones — personal and business. Others use dual-SIM (iPhones and most Samsung Galaxies support it). Dual-SIM is usually the better answer:

One phone to carry
One phone to charge
Separate work / personal contexts (separate WhatsApp, separate call logs)
Ability to switch business SIM off outside hours

Dual-SIM handsets work seamlessly with a CTN business SIM alongside a personal SIM from any other provider.

FAQs

Can I claim the full cost of a dedicated business mobile against my self-employment income?

Yes. A mobile phone used 100% for business is a fully allowable expense. Keep the contract in your business/trading name or clearly evidence the business use. Speak to your accountant for specifics.

Should I put my business mobile in my own name or a company name?

If you're a sole trader, either works. Typically the contract is in your name with your trading name and address on the account. For limited companies, contract goes in the company name.

What about my existing phone number?

You can port it to a new CTN business SIM if you want. Or keep your personal number on your personal SIM and have a separate new business number. Dual-SIM handsets run both.

Can I use a "business mobile" for personal use too?

Technically yes, but it muddies the tax treatment. Cleaner to keep business-use strictly business and personal-use on a separate (personal) SIM.

Is it worth the 36-month commitment for a sole trader?

For most sole traders with steady work, yes — the monthly price is lower and locked in. For very new or uncertain sole traders, a SIM-only flexible plan (not what CTN majors in) may fit better in the first year, with a business mobile once income is established.

Do sole traders get any discount?

We don't do "sole trader only" discounts — same tariffs as small SMBs. The tax treatment (100% allowable expense) is the bigger saving for most sole traders.

Getting a quote

Call 01743 598025 or request a quote.