The partnership will see all of Ipswich's equity release business introduced to KRS.
Ipswich chief executive, Paul Winter, said: “At Ipswich Building Society our primary aim for our customers is to make available leading products and services. The missing element from the range of services available has been that of equity release.
"After careful deliberation we chose Key Retirement Solutions to deliver an equity release service due to their unrivalled knowledge, independent advice and whole of market offering.”
Dean Mirfin, business development director at Key Retirement Solutions, added: “Our partnership with Ipswich Building Society is testament to our dedication to providing the best possible service tailored to individual needs.
"This deal is proof of the rising consumer confidence in equity release, and we look forward to providing members of the Ipswich Building Society with our expert advice.”