Quick answer
You cannot stop a rise that is already written into a live contract, but you can make sure the next contract does not have one, or has a much smaller one. The main levers are: move any line still on a legacy CPI or RPI plus 3.9% clause to a fixed-amount plan as soon as its term allows; ask for a no-increase tariff, which several business providers and resellers offer; choose the network and plan type with the lowest fixed amount for your line value (£0.50 to £1.50 on Three and O2 against £3.00 on EE handset plans); separate handsets from airtime so the rise only applies to a small airtime price; and get the year-two and year-three prices written into the order before you sign. On a 20-line estate the difference between the best and worst approach is well over £1,000 a year.
1. Get legacy lines off CPI or RPI plus 3.9%
Start here, because it is where the money is. Any business line signed or upgraded before your network moved to fixed-amount rises still carries an inflation-linked clause: before 2 September 2024 on EE, 2 July 2024 on Vodafone, 8 September 2024 on Three and 9 January 2025 on O2. Those lines have risen 7.9%, 6.4% and 7.3% in the last three springs (O2's RPI-based lines slightly more), a compound increase of more than 23%, and the Bank of England's current inflation outlook points to another 7% or so in April 2027. We explain the mechanics in RPI and CPI on business mobile contracts.
If a legacy line is out of its minimum term, re-signing or switching removes the clause immediately. If it has a few months to run, ask for an early re-sign; networks and resellers will often waive the remaining term to keep the connection. If it has a year or more to run, the termination charge is usually not worth paying, but put a diary date three months before term end so it does not roll on for another year.
2. Ask for a no-increase tariff
Ofcom's rules require rises to be specified; they do not require rises to exist. A number of business tariffs, particularly those sold through independent providers and resellers, carry no in-contract increase at all. The price you sign is the price for the term.
These plans are sometimes a pound or two a month more than the headline network rate, so compare over the full term rather than month one. A £22 no-rise plan against a £20 plan rising £3.00 a year on a 36-month term:
| Year 1 | Year 2 | Year 3 | 36-month total | |
|---|---|---|---|---|
| £20 plan, £3.00 annual rise | £240 | £276 | £312 | £828 |
| £22 plan, no rise | £264 | £264 | £264 | £792 |
The no-rise plan is cheaper by £36 a line, or £720 on 20 lines, despite costing more in month one. Against a £1.50 rise the £20 plan wins narrowly; against a legacy inflation clause the no-rise plan wins comfortably. Run the numbers on your own line value before deciding.
3. Choose the network and plan type with the lowest fixed amount
If you are staying with a network tariff, the fixed amounts differ enough to be a selection criterion in their own right. Current small-business figures, per line per month excluding VAT:
| Network | Fixed annual increase | Best for |
|---|---|---|
| Three | £0.50 (plans to £9.99), £0.75 (£10 to £20), £1.50 (£20.01 and up) | Low-value SIM-only estates |
| O2 | £1.50 on Small Biz tariffs | Mid-value plans |
| EE | £1.50 SIM-only, £3.00 handset plans | SIM-only only; avoid the handset-plan rise |
| Vodafone | £2.08 sole-trader (EVO), £3.00 limited-company (Bundled) | Sole traders; Ltd companies pay double |
A 20-line estate on £18 SIM-only plans pays £180 a year more in rises on Three than on EE SIM-only, and £540 a year less than on EE or Vodafone handset plans. The current figures for every regime, including the legacy percentages, are in business mobile price rises 2026.
4. Separate the handset from the airtime
Most networks apply the annual rise to the airtime plan only, not to a separate device finance agreement. A bundled £45 "phone plus airtime" plan on a £3.00 rise takes the £3.00 on the whole £45; the same arrangement as a £20 airtime plan plus a £25 device plan takes the rise on £20, and on EE it also moves the airtime from the £3.00 handset-plan rate to the £1.50 SIM-only rate. The device plan is fixed by definition because it is a credit agreement.
This also stops you paying an inflated combined price after the handset is paid off, which is the other quiet cost of bundled contracts. Our SIM-only vs handset contracts comparison and business SIM-only deals guide go into the trade-offs.
5. Watch the exclusions
The fixed-amount promise usually covers the core monthly plan price and nothing else. Vodafone raises out-of-bundle charges, add-ons and extras by CPI plus 3.9% on fixed-amount contracts; EE raises add-ons and out-of-bundle charges by 5%. If your estate regularly buys data add-ons, roams outside inclusive zones or bursts allowances, those charges are still rising at the old rate.
The fix is in the tariff design rather than the price clause: right-size data so nobody buys add-ons, include the roaming zones your people actually visit, and use pooled or shared data where usage is uneven. Business mobile cost saving covers the audit.
6. Time the contract
Fixed amounts on new contracts have gone up twice since 2024: EE handset plans from £1.50 to £3.00, Vodafone from £1.50 to £2.08 or £3.00, Three from a flat 4.5% to the current bands. Whatever figure is in force when you sign is locked for your term. If you are due to re-sign in the next few months, signing before the next uplift, which has tended to arrive in the autumn, fixes the lower amount.
Timing within the year matters less than people think: the first rise applies at the next 31 March or April whether you signed in May or February, so a 24-month contract always absorbs two rises. A 36-month contract absorbs three, which is one more argument for keeping terms short; see business mobile contract lengths.
7. Get the full-term price in writing before you sign
For businesses of ten employees or fewer, the network must show the pounds-and-pence rise and its date in the pre-contract information. Do not settle for that. Ask for the monthly price for each year of the term written into the order form or quote, including VAT treatment, and confirmation of what the rise does and does not apply to. A supplier who cannot produce that in 2026 is either disorganised or hoping you will not ask. It also gives you a clean document to hold them to if the applied rise ever differs; our guide to cancelling after a price rise explains what happens then.
Putting it together
A 20-line estate averaging £30 a line, all on legacy CPI plus 3.9%, will pay roughly £525 more this year than last and a similar amount again from April 2027. Moved to a no-increase tariff at a comparable price it pays nothing more; moved to Three or O2 fixed-amount plans it pays £360 a year more; left on EE or Vodafone handset plans at £3.00 it pays £720. Across a 36-month term the gap between the best and worst of those choices is more than £2,000, before any saving on the base tariff itself.
We source no-increase and low-increase business tariffs across all four networks and will show you the full-term cost side by side for your actual estate. Request a business mobile quote or arrange a callback.
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Frequently asked questions
Can I get a business mobile contract with no annual price increase?
Yes. Ofcom requires any rise to be specified, not that one exists, and several business providers and resellers offer tariffs with no in-contract increase. They sometimes cost slightly more at the start; compare the total over the full term rather than the first month's price.
Which network has the lowest price increase on business contracts?
On current small-business terms Three has the lowest cash rises (£0.50 to £1.50 depending on plan price), followed by O2 (£1.50) and EE SIM-only (£1.50). EE handset plans and Vodafone limited-company plans have the highest at £3.00. All figures are per line per month excluding VAT and apply to new contracts; older contracts on the same networks may still rise by inflation plus 3.9%.
Does the price rise apply to the handset part of my contract?
Usually not if the handset is on a separate device plan or credit agreement, which is fixed. If the handset cost is bundled into a single monthly airtime price, the rise applies to the whole amount. Splitting the two is one of the simplest ways to shrink the rise.
Can I negotiate the annual increase out of a business contract?
Often, particularly through a reseller or for estates of more than a handful of lines. Networks' own small-business channels tend to apply their standard clause, but independent providers have tariffs without one. Even where a rise cannot be removed, the amount is sometimes negotiable, and getting the year-two and year-three prices written into the order stops any later surprises.
Is a fixed pounds-and-pence rise always better than CPI plus 3.9%?
Not always. A £3.00 rise on a £30 plan is 10%, more than the 7.3% legacy customers paid in 2026. Fixed rises win when inflation is high or the plan price is high; percentage rises can be cheaper on expensive plans in low-inflation years. What fixed rises always give you is certainty, and what no-rise tariffs give you is the certainty without the increase.
If I re-sign to escape a legacy clause, will I lose my current handset deal?
Re-signing usually means a new minimum term, and if a handset is bundled the network may want to attach a new device. You can generally re-sign to a SIM-only plan and keep using the existing handset, which is also the cheapest option. Check for any outstanding device balance first.