Plusnet is offering the chance to get £50 cashback and discounted broadband for 12 months.
The Plusnet Unlimited Broadband & Phone Line costs £20 a month, plus a £10 set-up fee, meaning customers can benefit from a discount of £95.76 across the year.
Subscribers will get broadband speeds of up to 17Mbps, along with unlimited downloads.
Plusnet has promised "reliable, no nonsense broadband" that is "ideal for everyday streaming, web browsing and general internet use".
In addition, the package offers a phone line, with subscribers only paying for the calls they make and enjoying free calls to other Plusnet phone customers at any time.