Rate shock pushes UK borrowers toward costly two-year mortgages
Following the September 2022 mini-budget rate shock, UK households shifted toward more expensive two-year fixed mortgages over five-year deals, a Bank of England study finds. The 200 basis point rate rise also triggered significant deleveraging across refinancing borrowers.
Shorter fixes and lower leverage
Researchers Philippe Bracke, João Cocco, Elena Markoska, and Purnoor Tak analyzed administrative data around the September 2022 mini-budget interest rate shock.
Borrowers exposed to the 200 basis point rate rise were 11 percentage points more likely to choose two-year fixed mortgages over five-year loans, despite shorter fixes carrying roughly 10 basis points higher rates.
The study also documents substantial deleveraging: a one percentage point increase in rates reduced mortgage borrowing amounts by 1.9 percent for two-year products and 4.4 percent for five-year products, while lowering average loan-to-value ratios by 1.2 to 1.4 percentage points.
Same-lender refinances increased up to 17 percentage points as borrowers avoided affordability stress tests.
The premium on future equity extraction
Contractual flexibility explains the willingness to pay higher rates for shorter fixes.
Prepayment penalties on five-year loans average 5.0 percent in year one and 3.0 percent in year three, compared to zero after two years on shorter contracts.
While adjustable-rate mortgage shares rose from 5 to 15 percent, most borrowers still preferred fixed terms.
Survival analysis confirms that two-year borrowers extract equity substantially faster between years two and five after origination.
Flexibility at a steep price
The study proves that households prioritize future liquidity over long-term rate insurance.
Yet paying premium rates for flexibility leaves borrowers heavily exposed if high borrowing costs persist.
Regulators must realize that shorter debt duration accelerates policy transmission while increasing refinancing risk.