New Tax Year, New Telecoms Provider: Why April 2026 Is the Best Time to Switch Your Business Mobile

The 2026/27 tax year started on 6 April. For most UK businesses, that means fresh budgets, new financial targets, and a long overdue look at the contracts that quietly drain money every single month. If you have been thinking about when to switch mobile provider, right now is the answer.

Business mobile and telecoms costs are one of the biggest overlooked expenses. Most companies signed a deal two or three years ago, forgot about it, auto renewed on whatever the provider offered, and have been overpaying ever since. If that sounds familiar, you are not alone. We speak to businesses every week who are paying 30 to 40 percent more than they need to, simply because they never compared.

At Compare The Networks, we have been helping UK businesses find better telecoms deals since 2008. We are OFCOM regulated, rated 4.3 out of 5 on Trustpilot from over 1,000 reviews, and our comparison service is completely free. We compare EE, Vodafone, O2 and Three on your behalf so you can see exactly what each network offers at what price.

Here is why April is the best month to make the switch.

Your Contract Has Probably Already Rolled Over

Most business mobile contracts run for 24 or 36 months. Once that initial term ends, you move onto a rolling monthly contract at the same price (or sometimes higher). The network is not going to phone you and offer a better deal. Why would they? You are still paying.

If your contract started in 2023 or 2024, there is a good chance you are already out of contract and paying more than a new customer would. Checking is simple: call your provider and ask for your end of contract date, or request a PAC code. If they give you one immediately, you are free to switch.

Networks Are Fighting for Business Customers Right Now

April and September are the two busiest months for business mobile sales in the UK. Networks know that businesses review costs at the start of the financial year, and they respond with their most aggressive deals.

Right now in April 2026, we are seeing some of the strongest business mobile offers in years:

• EE is pushing hard on 5G business plans with enhanced coverage commitments
• Vodafone (now sharing masts with Three via the MOCN merger) is offering improved coverage that genuinely rivals EE for the first time
• O2 continues to lead on flexible contracts and data pooling for multi line accounts
• Three remains the budget leader for unlimited data, now with access to Vodafone's mast network

The competition between networks is good news for you. It means better deals, more flexible terms, and networks willing to negotiate on price to win your business.

The Vodafone Three Merger Changes Everything

If you have not been following the telecoms news, here is the headline: Vodafone and Three now share their entire mast network through a technology called MOCN (Multi Operator Core Network). This eliminated 16,500 square kilometres of mobile coverage not spots across the UK.

What does this mean for you? If you are on Vodafone or Three, you now get access to both networks' masts automatically. No new SIM, no new contract needed. Coverage that was patchy in rural areas or certain buildings has improved overnight.

This is particularly relevant if you rejected Vodafone or Three in the past because of coverage gaps. The landscape has fundamentally changed, and it is worth comparing again. Read our full analysis of the Vodafone Three merger for the details.

How to Switch Business Mobile Provider (It Takes One Working Day)

Switching is genuinely simple. The process has been regulated by OFCOM to protect consumers and businesses:

1. Request a PAC code from your current provider (they must give it to you within one working day by law)
2. Give the PAC code to your new provider (or to us, and we handle everything)
3. Your number transfers within one working day with minimal downtime (usually under an hour)

You keep your existing phone number. There is no gap in service. Your current provider cannot charge you an early termination fee if you are out of contract. And the whole process is covered by our Switching Promise: we guarantee completion within 14 days.

For businesses with multiple lines, we coordinate the entire switch so all lines move together at a time that suits you. No one loses their number, no one is without a phone.

What to Look for in a New Business Mobile Deal

Before you switch, make sure you are comparing the right things. Price per month is important, but it is not the only factor:

Data allowance. Are you paying for 50GB when your team only uses 10GB? Or are you running out of data and paying overage charges? We analyse your current usage and recommend the right data tier for each user.

Contract length. 12 month contracts give you flexibility. 24 month contracts are usually cheaper per month. 36 month contracts lock you in but can include handset upgrades. Choose based on how fast your business is growing.

Coverage. This is non negotiable. The cheapest deal in the world is worthless if you cannot make calls from your office. We check postcode level coverage for all four networks before recommending anything.

Business features. Do you need fleet management? MDM (mobile device management)? International roaming? Data pooling across your team? Not every network includes these, and some charge extra.

Hidden costs. Out of bundle data charges, roaming fees, mid contract price rises, early termination fees. Read the small print, or let us read it for you. We know where the catches are because we have been doing this for nearly 20 years.

For a complete guide, see our step by step comparison framework.

The Tax Benefit Most Businesses Miss

Here is something worth mentioning at the start of a new tax year: your business mobile costs are tax deductible.

If your business is VAT registered, you can reclaim 100% of the VAT on business mobile contracts. That is an immediate 20% saving that many small businesses do not claim. Line rental, data charges, handset costs, and even insurance can all be reclaimed.

For sole traders, you can claim the business use proportion of your mobile costs as an allowable expense against your income tax. If 80% of your calls and data are for business, you can claim 80% of the cost.

Starting the tax year with a cheaper contract AND reclaiming the VAT on it is a meaningful saving. For a team of 10 paying an average of £25 per month each, switching to a deal at £15 per month and reclaiming VAT saves over £3,600 per year. That is real money.

Read our full guide on claiming business mobile costs as a tax expense.

Real Savings We Have Delivered

We are not going to quote you a hypothetical number. Here is what we consistently see when businesses switch through us:

• Sole traders and micro businesses (1 to 3 lines) typically save 15 to 25 percent
• SMEs (5 to 20 lines) typically save 25 to 35 percent, with bulk discounts kicking in at 5 lines
• Larger businesses (20+ lines) often save 30 to 40 percent through negotiated fleet deals

The savings come from three places: competitive pricing between networks (which you only get by comparing), right sizing data and features to what you actually need, and removing legacy charges from old contracts that have rolled over.

Why Use Compare The Networks?

You could phone each network yourself. Call EE, then Vodafone, then O2, then Three. Sit through the sales pitches. Try to compare four different quote formats with different contract terms, different data structures, and different hidden fees.

Or you could get a free quote from us and we do all of that for you in one conversation. Here is what makes us different:

• Independent. We are not owned by any network. We have no incentive to push one over another.
• OFCOM regulated. We operate under a regulatory framework that requires transparency and fair treatment.
• All four networks. EE, Vodafone, O2 and Three. We compare them all, side by side, on coverage, price, features, and contract terms.
• Free. Our service costs you nothing. The networks pay us a commission, and you pay the same price (or less) than going direct.
• Experienced. We have been doing this since 2008. Over 2,000 businesses have switched through us. We are rated 4.3 out of 5 on Trustpilot from 1,000+ reviews.

Start the Tax Year Right

The best time to review your business mobile costs was when your contract ended. The second best time is today.

Get a free, no obligation quote and see how much you could save. It takes under 60 seconds, and there is zero pressure. We will show you what each network offers for your specific needs, and you decide.

Or if you want to browse first, compare business mobile deals from all four networks on our dedicated comparison page.

Frequently Asked Questions

How long does it take to switch business mobile provider?

The actual number transfer takes one working day once you give your PAC code to your new provider. For businesses with multiple lines, we typically complete the full switch within 5 to 10 working days, coordinating so there is minimal disruption.

Will I lose my phone number when I switch?

No. When you request a PAC code and give it to your new provider, your existing number transfers automatically. This is a legal right protected by OFCOM regulation.

Can I switch if I am still in contract?

You can, but your current provider may charge an early termination fee (the remaining months multiplied by your monthly cost). If you are out of contract (on a rolling monthly deal), you can switch with 30 days notice and no penalty.

Is it really free to use Compare The Networks?

Yes. We are paid a commission by the networks when you switch through us. You pay the same price as going direct, and often less because we negotiate bulk and loyalty deals that are not available to individual customers.

What if I have different phones on different networks?

That is fine. We can consolidate all your lines onto one network for simplicity and bulk discounts, or keep them split across networks if coverage varies by location. We recommend whatever works best for your specific situation.

How much can I realistically save?

Most businesses save between 20 and 35 percent when they switch through us. The exact amount depends on what you are currently paying, how many lines you have, and which network fits your coverage needs.