Offset mortgages, an innovative product from the late 1990s, have fallen out of favor but brokers say they are hugely underused and could benefit many borrowers, especially the self-employed and higher earners. These mortgages allow borrowers to link their savings account to their mortgage, reducing the interest charged on the outstanding balance while keeping savings accessible.
How offset mortgages work
With an offset mortgage, the bank subtracts the savings balance from the mortgage balance before calculating monthly interest. Savings remain in an accessible account but act as a financial shield against mortgage debt. This means borrowers pay interest only on the difference, potentially saving thousands over the loan term.
Brokers call for a comeback
Hannah Vandervennin, director and mortgage adviser at The Mortgage Consultancy, said offset mortgages are "hugely underused" and have been "abandoned by lenders." She noted that only two mainstream lenders still offer them to new borrowers, and they largely survive in private banking. "Offset lets your savings sit against your loan so you only pay interest on the difference and you keep full access to the cash," she said.
Nouran Moustafa, practice principal and IFA at Roxton Wealth, said many people do not understand offset mortgages. "Most people are trained to ask 'what is the cheapest rate?' rather than 'how can my mortgage and savings work together?'" She emphasized the flexibility they offer for higher earners, self-employed clients, business owners, and families with large emergency funds.
Benefits for the self-employed
Philly Ponniah, chartered wealth manager and financial coach at Philly Financial, said offset mortgages work especially well for barristers and other self-employed professionals who hold large cash balances for tax payments. "Rather than leaving that cash in a standard savings account, they can use it to reduce the interest charged on their mortgage while keeping it accessible when HMRC payments are due," she said.
Scott Taylor-Barr, principal adviser at Barnsdale Financial Management, specializes in mortgages for legal professionals. He said offset mortgages are a brilliant tool for barristers who are predominantly self-employed and must save for income tax and VAT. "Putting these savings to work within an offset mortgage is a brilliant way for them to still have the cash available, with little risk, no income tax liability, and ultimately a mortgage that is repaid sooner."
Drawbacks to consider
Offset mortgages often carry higher interest rates than standard deals, so the benefits depend on how much cash the borrower consistently holds. If the linked account does not have meaningful savings, the benefit disappears. Brokers also note that availability is limited, with only about five lenders currently offering offset mortgages, including Accord Mortgages, Barclays, and Coventry for Intermediaries. Scottish Widows Bank, once the biggest provider, exited the new business mortgage market in October 2023.
A missed opportunity
Richard Davidson, mortgage advisor at onlinemortgageadvisor.co.uk, called offset mortgages a "missed opportunity." He said that with rates higher again and savings earning something, this should be the moment lenders rediscover them. "The honest problem is that very few products exist and almost nobody has bothered to explain them in years," he said.
Harry Goodliffe, director at HTG Mortgages, said too many savers earn less on their savings than they pay on their mortgage, making offset mortgages a sensible option. However, he noted that offset products are often niche and may not offer the lowest headline rate.
Conclusion
Offset mortgages remain a lesser-known product that can be highly effective for the right borrower. They offer flexibility, tax efficiency, and the ability to reduce interest costs without locking away cash. However, borrowers need sufficient savings and discipline to make them worthwhile. As Thomas Boughton, founder of Artillium Real Estate Finance, said, "They can be particularly beneficial for self-employed clients who are holding funds aside for a future tax bill, allowing that money to reduce mortgage interest while remaining fully accessible when needed."
