Best UK Utilities Sign-Up Offers (2026)

Most UK utility providers — energy, broadband, mobile, TV — have some kind of sign-up offer or switching bonus. Since you’re paying for these services anyway, it’s worth checking what’s available before you renew or switch.

I’ve listed the current offers below. A lot of these work particularly well when combined with cashback sites — you can often get cashback on top of the provider’s own welcome deal.

Best UK Utilities Sign-Up Offers

Compare current welcome bonuses and switching deals from energy, broadband, mobile and TV providers.

How to Get the Best Deal

Compare the actual tariff first. The sign-up bonus is a nice extra, but the monthly cost is what matters long-term. Use comparison sites to check you’re getting a competitive rate, then look for the best sign-up offer on top.

Check cashback sites before switching. TopCashback and similar sites often pay £30-£100+ for switching energy, broadband or mobile. This stacks with the provider’s own welcome offer in most cases.

Referral links beat going direct. Many providers give both you and the referrer a bonus when you sign up through a referral link. The offers in the table above use these where available.

Time your switches. The best time to switch is when your current contract ends — you’ll avoid early exit fees and have the most bargaining power. Set a reminder a month before your contract expires.

What Types of Offers Are Available?

Energy suppliers like Octopus Energy, OVO and British Gas run referral bonuses (typically £50-£100 credit each) when you switch. Some also offer smart meter bonuses or fixed-rate deals. Use the Octopus Energy Tracker to compare tariffs.

Broadband providers compete aggressively for new customers — cashback offers, free setup, or gift cards are common when switching. The best deals usually appear when your current contract is ending.

Mobile networks offer cashback, free data boosts, or discounted first months. Pay attention to whether the offer is for SIM-only or contract, and check what happens to the price after any introductory period.

TV and streaming services regularly run free trial periods or bundled deals with broadband. Worth checking if your broadband provider offers a cheaper bundle before signing up separately.

Before You Switch

Check your current contract. Switching mid-contract usually means paying an early exit fee. Make sure the saving from switching outweighs any penalties.

Note what’s included. A cheaper broadband deal might have slower speeds or data caps. A cheaper energy tariff might be variable rate. Read what you’re actually signing up for.

Keep proof of the offer. Screenshot the deal before you sign up. If a welcome bonus doesn’t appear, you’ll need evidence of what was promised.