Junction, the affinity business of broker Budget, is to provide a home insurance product to retailer Homebase.
Under the deal Budget said it expects to generate a significant volume of policies each year.
Budget group chief executive Peter Winslow said: "Working with a household name like Homebase is a real boon for our ever growing affinity business and demonstrates the quality of the insurance solutions we are able to offer to third parties."
Homebase spokesman Shaun McCabe said: "Homebase home insurance is a great product and something our customers have been asking for.
"It provides excellent cover at a highly competitive price and, together with our new personal loans offer, will provide a fantastic platform to launch our personal finance proposition both in-store and to the Spend and Save audience."