What is business mobile contract novation?

A three-way formal agreement transferring the contract from seller to buyer entity, with provider's consent. Most UK providers agree if the new entity has comparable creditworthiness. Some charge admin fees (£50-200); some refuse novation entirely.

Transfer Business Mobile When Selling a UK Business (2026): Novation Guide

Last updated: April 2026

When you sell a UK business, the mobile contracts go with it — sometimes automatically, sometimes via novation, sometimes triggering early termination fees. Here's what actually happens and what to negotiate during the sale.

The three transfer scenarios

1. Asset sale (only assets, not the company)

If the buyer is acquiring assets only (customer list, equipment, brand, inventory) — not the company itself — mobile contracts are NOT automatically transferred. They remain with the seller's business entity.

Common in small business / sole trader sales. The seller usually has to either:

Cancel the contracts and pay any ETF
Retain the contracts for personal use
Negotiate novation with the provider so they transfer to the new owner

2. Share sale (company itself sold)

If the buyer is buying the company entity (shares of the limited company), mobile contracts transfer automatically — they're contracts of the company, and the company's owner has just changed hands. Same legal entity, new shareholders.

No novation needed for share sale. Provider may want notification but contractually nothing changes.

3. Novation (formal contract transfer)

For asset sales where buyer wants the contracts: a three-way agreement (seller, buyer, provider) where the contract is formally transferred to the buyer's entity. Provider's consent required.

Most UK mobile providers will agree to novation if:

The new entity has comparable creditworthiness
All accounts are up-to-date
Both parties sign the novation deed

Some providers charge a small admin fee (£50-200) for novation. Some refuse novation and require new contract for buyer instead.

What can go wrong

Provider refuses novation

Some UK business mobile providers won't novate — they require the seller to terminate (pay ETF if mid-contract) and the buyer to sign a fresh contract.

If you're selling the business, this means:

Seller pays ETF (could be substantial — £5,000-20,000 for medium businesses mid-contract)
Buyer starts fresh contract at current market rates (often higher than your locked-in deal)

Negotiate: who absorbs this cost in the sale price? Often the seller absorbs as a sale-completion cost.

Buyer doesn't want the existing contracts

Buyer may want to consolidate with their existing provider, or restructure the mobile setup completely. In that case:

Seller terminates, pays ETF
Buyer sets up new contracts under their existing provider
Numbers can usually be ported to buyer's new provider

Coordinate ahead of completion to avoid service gap.

Mid-contract increases stack with novation

If the contract's annual £2.50/month increase has just hit, the buyer inherits the higher rate. Worth flagging in disclosure.

Bundled services unbundling

If mobile is bundled with VoIP, broadband, Microsoft 365, IT support — bundles complicate novation. Often need to unbundle into separate contracts before novation, or novate the whole bundle together.

What to do during sale negotiation

Disclosure phase

Include in the data room:

All current mobile contracts (provider, monthly cost, term, end date)
Recent bills (3 months minimum)
ETF calculation if buyer wants to terminate
Number of SIMs and allocation to staff
Any contractual issues (disputes, late payments)

Heads of terms

Specify how mobile contracts will be handled:

"Contracts to be novated to Buyer at completion"
"Contracts to be terminated at completion; ETF cost absorbed by [Seller / Buyer / shared]"
"Buyer to take new contracts; numbers ported on completion date"

Provider notification

Notify the mobile provider once heads of terms signed (subject to confidentiality if needed). Provider may need 30-60 days lead time for novation.

Service continuity

Plan for completion-day continuity:

Numbers must continue working (port or novate)
Staff need uninterrupted service
Customers must be reachable
No gap in voicemail / call routing

What buyers should ask

If you're buying a business, ask the seller:

Provider, contract end dates, monthly cost per SIM
Any contractual issues (disputes, unfair terms, mis-selling claims)
Will provider novate, or are we starting fresh?
Number portability — can we keep the numbers?
Any handsets included? (and their condition / age)
Bundled services — is mobile pure-play or part of bundle?

Tax considerations

For the seller:

Asset sale: any ETF paid is a deductible business expense in the year paid
Share sale: contracts transfer with company; no ETF event for tax purposes
VAT on transfer: novation usually doesn't trigger VAT; cancellation + new contract may

For the buyer:

Existing contracts: continue normal monthly payment treatment
New contracts started post-acquisition: standard expense treatment
Bulk migration costs: capital or expense depending on size

Speak to your accountant for specifics.

FAQs

Do business mobile contracts transfer automatically when I sell my business?

Depends on the sale structure. Share sale (selling the company entity): yes, contracts transfer automatically. Asset sale (selling only assets / business as a going concern): no, contracts stay with the original entity unless novated formally.

What is mobile contract novation?

A formal three-way agreement (seller, buyer, mobile provider) transferring the contract from one entity to another. Provider's consent is required. Most UK providers will agree if the new entity has comparable creditworthiness.

Will my mobile provider charge a fee for novation?

Some do (£50-200 admin fee), some don't. Some refuse novation entirely and require the buyer to take new contracts. Worth asking your provider directly during sale planning.

What happens if my buyer doesn't want my mobile contracts?

Seller terminates (paying any ETF), buyer sets up new contracts. Numbers can usually be ported to maintain customer reach. Negotiate during the sale who absorbs the ETF cost.

Can I keep my old business mobile number after selling the business?

If the contract is in your personal name (sole trader): yes, you can keep using the SIM for personal use. If the contract is in the company's name and you've sold the company (or assets including the contract), the buyer typically takes the number. If they don't want it, you can negotiate retention.

Getting help

Call 01743 598025 or request a quote. For active sale processes, we can advise on contract handover, novation versus replacement, and number portability.