How to Cancel a Three Business Mobile Contract: The Complete SME Guide

Three Business is often the choice for SMEs looking for high data allowances and competitive pricing. However, if their network coverage has become unreliable or you require more advanced business features, you may decide it is time to leave.

In 2026, Three has updated its “Three Your Way” plans to follow the split-contract model, making it vital for business owners to know exactly which parts of their contract they are cancelling.

1. How to Terminate Your Three Business Contract

You have three options when leaving Three:

• The PAC Route: Use this if you want to keep your number. When your new provider uses the PAC, Three will automatically close your account.
• The STAC Route: Use this if you want to cancel your number and start fresh on a new network.
• Standard Cancellation: If you are closing the line and do not need a new provider, you must give Three 30 days’ notice.

The 2026 Rule: If you are moving to a new provider, Three is not allowed to charge you for any notice period once your number has ported. You only pay for the days you actually used.

2. Calculating Three Early Termination Charges (ETCs)

Leaving Three before your minimum term ends will result in a cancellation fee.

The Three Calculation Formula

• Total Remaining: Three adds up the remaining monthly charges for the rest of your minimum term.
• The 3% Discount: They apply a 3% discount to this total (this is a “variable” rate but is currently 3% for 2026 business contracts).
• VAT: VAT is then added to the final discounted figure.

Example Calculation:

If you have 8 months left on a £20/month (ex. VAT) plan:

• 8 months x £20 = £160.
• Minus 3% discount (£4.80) = £155.20.
• Final Bill (with 20% VAT) = £186.24.

3. Save Time and Money with The Business Hub

Trying to leave Three while managing a busy company can be stressful. The Business Hub helps UK businesses avoid the pitfalls of switching.

They act as an independent advisor, checking the coverage and pricing of all “Big Four” networks to ensure your next move is the right one. They specifically look for ways to offset your Three exit fees by finding more competitive rates elsewhere.

How The Business Hub works for you:

• Number Management: They coordinate the porting of all your business lines so no calls are missed.
• Contract Negotiation: They use their market data to get you better rates than you would get by going to a network directly.
• No More Jargon: They explain the “small print” of Three’s termination clauses in simple terms.

Before you call Three’s retention team, see what The Business Hub can offer your business.

4. How to Contact Three Business to Cancel

If you need to speak with Three about your cancellation, use these direct numbers:

5. Three Your Way: Cancelling Split Contracts

If you joined Three recently, you may be on a “Three Your Way” plan. This separates your Device Plan (the phone) from your Airtime Plan (the data).

• If you cancel the Airtime: You must pay off the remaining balance of your Device Plan in full.
• The Loophole: You are allowed to pay off your Device Plan at any time and stay on the Airtime plan. This is a great way to reduce your monthly costs if your business has some spare cash.

6. Final Three Checklist

• Check your VAT Invoices: Three’s business portal access is often cut off immediately after your final bill is issued. Download your past invoices now.
• Check “Go Roam” Charges: If you have used Three’s roaming services in the final month, these may be billed up to 38 days after you leave.
• Unlock your Phone: Most Three phones sold after December 2021 are unlocked, but if you have older business hardware, you may need to request an unlock code via the Three website.

Frequently Asked Questions

Can I cancel my Three contract early if I move offices?
Standard contracts do not allow for free cancellation due to a change of business address. However, if Three cannot provide a signal at your new location, you may be able to negotiate a reduced exit fee.

How long does it take to get a PAC code from Three?
If you text PAC to 65075, you should receive it within 60 seconds. If you call, they must give it to you immediately or within two hours.

What happens to my Three Business Insurance?
If you have insurance through Three, it is usually tied to your airtime contract. When you cancel the contract, the insurance ends. Ensure you have new cover in place for your handsets before you switch.

Is there a limit on how many lines I can cancel at once?
If you have a multi-line account, you can cancel all lines simultaneously, but you will need to speak to the business team on 0800 358 3003 rather than using the text service.

Related guide: Switching rather than just cancelling? See how to switch your business mobile network.