4th Utility runs its own full fibre in apartment buildings and new developments, and also offers full fibre over CityFibre, Openreach and several altnets. Its introductory prices are some of the lowest you will find for full fibre.
The catch is what happens after the discount. Most of 4th Utility’s deals are half price for the first six months, then the monthly bill doubles. Judge it on the price you will pay for most of the contract, not the first month.
Our simple pick: 4th Utility 150Mbps on CityFibre’s network, where the upload speed is the same as the download speed. Compare its standard price, shown in the table, with the 150Mb packages from Vodafone and Plusnet before you decide.
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4th Utility packages
| Package | Average download / upload speed | First 6 months | Standard price from 15 April 2027 | Contract |
|---|---|---|---|---|
| 150Mbps on Openreach | 150Mb / 20Mb | £16.00 | £32.00 | 24 months |
| 150Mbps on CityFibre | 150Mb / 150Mb | £16.00 | £32.00 | 24 months |
| 200Mbps | 200Mb / 200Mb | £12.00 | £24.00 | 24 months |
No set-up fee. Prices for new customers ordering online, checked on 16 October 2026. Faster packages up to 2.3Gb are available in selected CityFibre areas. 4th Utility’s terms say prices may also increase during the contract.
Who 4th Utility suits
- People in apartment buildings already wired by 4th Utility.
- Homes on CityFibre’s network that want symmetrical speeds at a low starting price.
- Anyone who wants a short contract, as 12-month and one-month options are available at a higher monthly price.
Who should look elsewhere
- Buyers who want a steady monthly bill. The jump after the introductory period is large.
- Homes on the Openreach network, where 4th Utility’s upload speeds are lower and its standard prices are higher than several big names.
Price rises
As well as the step up after the discount, 4th Utility’s terms allow prices to increase during the contract. Read the contract summary for the exact amounts and dates.
Router
4th Utility offers a router with every package and asks you to return it when you leave.
Social tariff
4th Utility’s social tariff is one of the few available on a rolling monthly basis. See our social tariff guide.
FAQs
Is 4th Utility cheap?
For the first six months, very. After that, its standard prices are similar to or higher than many larger providers, so compare the whole contract cost.
Which networks does 4th Utility use?
Its own full fibre in some buildings, plus CityFibre, Openreach, Community Fibre and other altnets.
Does 4th Utility offer rolling contracts?
Yes. One-month and 12-month contracts are available at higher monthly prices.
Is 4th Utility symmetrical?
On its own network and CityFibre, yes. On Openreach, upload speeds are lower.