A monthly price is a timeline, not one number.
For new UK telecoms contracts, any scheduled in-contract increase must be clearly set out in pounds and pence before sign-up. Compare the full price path.
What changed in January 2025.
For new UK mobile contracts entered into from 17 January 2025, scheduled in-contract price rises must be presented as clear pounds-and-pence amounts with the timing stated before the customer is bound.
Old style
“CPI + 3.9%” left the future price unknown at sign-up.
New-contract requirement
A plan with a scheduled increase should state the future price or exact £ increase and when it takes effect.
Your comparison
Put each option’s price timeline side by side, not only the first advertised month.
Why the future price belongs in the comparison.
This is an illustrative calculation, not a live offer. It shows why a low starting price should not be evaluated without the later scheduled price.
| Illustrative plan | Starting price | Later stated price | Comparison lesson |
|---|---|---|---|
| Plan A | £10/month | £12/month from a stated future date | Compare the total minimum-term cost, not just £10 |
| Plan B | £18/month | £20/month from a stated future date | Record the date and the exact pounds-and-pence change |
Use three layers.
Connection, handset or deposit payable at the beginning.
The recurring service/device charge before any scheduled change.
Specified increases during the minimum term.
Add-ons, roaming, premium use or services not included in the core price.