How to Switch from BT to Sky

Thinking about switching from BT to Sky? This guide covers what makes the move notable, especially the implications of leaving BT's legacy network and what to expect when you join Sky, including broadband speeds and phone line changes.

Before you switch

Check your BT contract end date to avoid unexpected exit fees. If you leave BT early, you may face an early termination charge, which can be significant depending on your remaining contract term. For example, 12 months left could mean an average exit fee of around £219.04 (Which?).

Review what you might lose by leaving BT. Your BT email address will stop working 60 days after cancellation unless you pay £7.50 per month for BT Premium Email. Bundled services like BT TV or discounts may also end. Make sure to check for any other services tied to your BT account.

How to switch, step by step

Broadband: Contact Sky to start your switch. Thanks to Ofcom's 'One Touch Switch' process, Sky will handle notifying BT and managing your switch. If both providers use the Openreach network, the process is automatic. If your BT service is on a different network type, you may need a cease-and-reprovide, which could involve a short break in service. Sky will confirm if an engineer visit is needed.
Mobile: If you want to keep your BT mobile number, text PAC to 65075 to get your Porting Authorisation Code. Give this code to Sky Mobile when signing up. Your number will usually transfer within one working day. If you do not want to keep your number, request a STAC code instead.
Energy: If you are switching energy services from BT to Sky, sign up with Sky and they will handle the switch for you. The process typically takes five working days under the energy switching guarantee.

What to watch out for

Do not cancel your BT service yourself. Let Sky handle the switch to avoid overlap and double charges.
If you signed up to BT Broadband after 13 December 2019, you must return your BT Hub within 60 days of cancellation or face a fee of about £50.
BT email addresses are deactivated 60 days after your broadband ends unless you subscribe to BT Premium Email. Plan ahead if you rely on your BT email.

Comparison of BT and Sky Broadband Services in the UK (as of March 2026)

Comparison of BT and Sky Broadband Services in the UK (as of March 2026)
Package Name	Provider	Average Download Speed	Average Upload Speed	Monthly Price	Contract Length	Data Allowance
Full Fibre 74	BT	74 Mbps	20 Mbps	£32.99	24 months	Unlimited
Full Fibre 150	BT	150 Mbps	30 Mbps	£36.99	24 months	Unlimited
Full Fibre 300	BT	300 Mbps	50 Mbps	£41.99	24 months	Unlimited
Full Fibre 500	BT	500 Mbps	73 Mbps	£46.99	24 months	Unlimited
Full Fibre 900	BT	900 Mbps	110 Mbps	£51.99	24 months	Unlimited
Sky Superfast	Sky	61 Mbps	16 Mbps	£26.00	18 months	Unlimited
Sky Ultrafast	Sky	145 Mbps	27 Mbps	£29.00	18 months	Unlimited
Sky Ultrafast Plus	Sky	500 Mbps	75 Mbps	£32.00	18 months	Unlimited
Sky Full Fibre 75	Sky	75 Mbps	20 Mbps	£39.00	24 months	Unlimited
Sky Full Fibre 150	Sky	150 Mbps	30 Mbps	£39.00	24 months	Unlimited
Sky Full Fibre 300	Sky	300 Mbps	50 Mbps	£41.00	24 months	Unlimited
Sky Full Fibre 500	Sky	500 Mbps	75 Mbps	£44.00	24 months	Unlimited
Sky Full Fibre 900	Sky	900 Mbps	100 Mbps	£49.00	24 months	Unlimited

Pricing and speeds as published by providers in March 2026. See sources below for details.

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Frequently asked questions

How much does it cost to leave BT?

If you cancel your BT broadband service before the end of your minimum contract period, you'll incur an early termination fee. This fee is calculated based on the remaining months of your contract, minus any costs BT saves from your early departure. For example, if you have four months left on a £35 monthly plan, the fee would be approximately £67.32, including VAT. (bt.com)

How long does the switch from BT to Sky take?

The switching process from BT to Sky typically takes around 14 days. Sky's 24/7 switching support service ensures a smooth transition, handling the entire process on your behalf. (skygroup.sky)

Will I lose my phone number, email address, or smart meter data when switching to Sky?

Switching to Sky Broadband should not affect your existing phone number or email address. However, it's advisable to contact BT to confirm the status of your email account and any associated data. Regarding smart meter data, it remains unaffected by the broadband switch, as it's managed separately from your internet service.

Can I switch to Sky if I am still under contract with BT?

Yes, you can switch to Sky even if you're still under contract with BT. However, you'll be responsible for any early termination fees imposed by BT for ending your contract early. (bt.com)

Do I need to contact BT, or does Sky handle the switch?

Sky handles the entire switching process for you. There's no need to contact BT directly; Sky will manage the cancellation of your BT service as part of the switch. (skygroup.sky)

What happens if something goes wrong during the switch from BT to Sky?

Sky offers a 24/7 switching support service to assist with any issues during the transition. If you experience problems, you can contact Sky's support team for assistance. (skygroup.sky)

Is there any downtime when switching from BT to Sky?

Sky aims to ensure a seamless transition with minimal downtime. The switch typically takes around 14 days, during which your broadband service may experience brief interruptions. Sky's 24/7 support is available to address any concerns during this period. (skygroup.sky)

Are there any specific considerations when switching from BT to Sky?

When switching from BT to Sky, ensure you return any BT equipment, such as routers or TV boxes, within 60 days of cancellation to avoid additional charges. Additionally, check if you're eligible for any switching credits or offers from Sky to offset early termination fees from BT. (broadband.co.uk)