Mobile Price Rises in April 2027: What Your Contract Says and What You Can Do

If you are on a mobile contract that started on or after 17 January 2025, the amount your bill will rise in April 2027 is already written into it in pounds and pence. For many customers of the big networks that means £2.50 a month more on airtime plans. Whether you can leave without paying depends on whether that rise was in your terms from the start.

Mid-contract price rises have been a regular spring complaint for years. The rules changed in early 2025, and the April 2027 increase will be the third round under the new system, so it is a good moment to understand what you signed up to and what your options are before the letters and texts arrive in the new year.

What changed in January 2025

Before 2025, most phone contracts allowed the provider to raise prices each April by a figure tied to inflation, often the Consumer Price Index plus a few percentage points. You could not know the exact rise when you signed. From 17 January 2025, new contracts have had to say exactly how much the price will increase each year, in money rather than percentages.

Citizens Advice sets out the difference clearly: if your contract started on or after that date, it should state the yearly increase. If it started earlier, the contract might say the price will go up by a percentage or in line with inflation. Either way, if the rise was in the terms when you agreed to them, it is part of the deal.

How much the big networks are adding

As of mid-November 2026, two of the largest networks publish their April figures on their own websites:

• O2: the O2 prices page says airtime plans go up by £2.50 a month from April 2027, giving the example of a £30 plan rising to £32.50. Data-only and smartwatch plans rise by 75p a month. Device plans are not affected, and charges for using services outside your bundle go up by 5% from 1 April.
• Vodafone: its annual price rise page says the monthly cost of pay monthly plans with airtime or data increases by £2.50 each year on 1 April, and that device plans are not affected. Out-of-bundle charges rise each April by the January CPI figure plus 3.9%.

Other networks and the smaller brands that use their masts set their own amounts, and some sell plans with no yearly rise at all. Your contract summary, the short document you received when you signed, is the quickest place to find your own figure.

Can you leave without paying?

This is the question most people ask, and the answer is usually no if the rise was already in your terms. Citizens Advice explains that you will not be able to cancel without a fee where your terms and conditions say your provider can put the price up each year, or where you were told at the start that the price would go up.

The picture is different when a provider raises a price that was not covered by your terms. In that case it should give you 30 days' notice, and you have a legal right to cancel within those 30 days without paying a fee. If that happens, contact the provider and say clearly that you are cancelling within the notice period.

Five ways to soften the April rise

1. Check whether you are out of contract

Many people stay on the same plan long after the minimum term has finished. If you are past that date, you can usually move to a cheaper SIM-only deal on the same network or switch to another network and take your number with you.

2. Look at the device plan separately

Because O2 and Vodafone keep device plans frozen, the rise lands on the airtime part of your bill. If your handset is nearly paid off, the airtime plan is where you have room to change things.

3. Right-size your data

Check your real monthly usage in your network's app over the last few months. If you are paying for unlimited data but using a fraction of it, a smaller plan can absorb the increase and still leave you better off.

4. Ask about social tariffs

If you receive certain benefits, ask your network whether it offers a social tariff. Vodafone, for example, says it does not increase prices for customers on its social tariffs or customers registered as financially vulnerable. Other networks have their own arrangements, so it is worth asking directly.

5. Keep an eye on out-of-bundle use

Calls to some numbers, international calls and extra data outside your allowance are the charges that rise by a percentage. If those make up a meaningful part of your bill, a bolt-on or a plan that includes them may cost less after April.

If you are signing a new contract this winter

Plenty of people upgrade between Black Friday and New Year. Any contract you sign now will see its first rise in April 2027, only a few months in. Add the fixed yearly increases to the headline price before you compare offers, using the method in our guide to working out the real cost of a Black Friday phone deal. If you are thinking of a second-hand handset with a SIM-only plan instead, our refurbished phone guide covers the checks that matter.

What to do if you think you have been charged wrongly

Start by comparing the new price with your contract summary. If the figure is different from what you were promised, raise a complaint with the provider and keep a record of what you sent and when. On the Citizens Advice page about cancelling phone contracts, the guidance is that if you have not heard back after 6 weeks, you can use an alternative dispute resolution (ADR) scheme, where an independent body tries to help the two sides agree. Their consumer helpline can talk you through the process if you are unsure where to begin.

A short note on timing: notices of the April increase usually start appearing from late winter. Reading your contract summary now, before Christmas, gives you time to make a calm decision instead of a rushed one in March.