The Contract Price Promise, in plain English
- Your broadband price is fixed for your entire contract. Sign at £34/month for 24 months and you pay £34/month for 24 months. No CPI, no RPI, no “+£3 every April”. It applies to all of Zen's current broadband packages — Zen's own wording is here.
- Zen estimates the saving at up to £108 over 24 months versus providers that apply two annual in-contract rises. That maths checks out against the ~£3–£3.50/month annual increases BT, EE, Vodafone, Sky and Virgin Media currently write into their contracts.
- It also changes the comparison maths. A rival deal that starts £4/month cheaper than Zen can end up costing about the same across a full 24-month term once its two birthday rises land — always compare total contract cost, not month one.
What the promise doesn't cover
- Out of contract, prices can rise — with at least 30 days' written notice (for customers who joined after June 2022). Set a reminder for your contract end date and either re-sign or renegotiate; drifting out of contract is where everyone's broadband gets expensive.
- Add-ons follow their own pricing (digital voice calls, EveryRoom mesh). The fixed-price promise is about your core broadband subscription.
- The older “Price for Life” guarantee — if you signed up before 31 May 2022 you may still hold Zen's legacy lifetime price promise, which is even stronger. New sign-ups get the Contract Price Promise instead.
How the big providers compare
As of 1 September 2026: BT, EE, Plusnet and Vodafone write a fixed £3/month annual increase into their contracts; Sky applies its own annual increase; Virgin Media typically £3.50/month. Ofcom banned the old inflation-linked percentage rises, but fixed-pound rises are still standard practice everywhere — except at the handful of fixed-price providers, of which Zen is by far the most decorated. See the full head-to-heads: Zen vs BT, Zen vs Sky, Zen vs Virgin Media, Zen vs Vodafone.
One more saving on top
If fixed pricing is what brings you to Zen, remember the £40 referral eGift card for new broadband customers — used before you order, it's effectively another month-and-a-bit free on most packages.