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Daniel Norris, Elio Cucullo and Vasilis Jacovides

When debtors enter a fixed-rate mortgage, lenders take a look at whether or not they may proceed to afford their mortgage if rates of interest have been to extend by the point it involves re-fix. This ‘stressing’ is designed to create further resilience for debtors and the monetary system. During the last two years, mortgage charges have elevated by over 4 share factors, elevating the price of repayments for these re-fixing. We take a look at UK mortgage information and examine the stress charges utilized at origination to charges obtainable to debtors when re-fixing. We discover that the overwhelming majority of debtors who got here to the tip of their mounted phrases in 2023 confronted new mortgage charges which have been decrease than these they’d been ‘pressured’ at.
Because of this whereas these debtors will nonetheless really feel the squeeze of upper rates of interest, their mortgage repayments usually are not as excessive as underneath the pressured situation they have been examined towards. We discover that this ‘headroom’ would stay for almost all of debtors even on the peak degree mortgage charges reached in 2023.
You will need to flag upfront that there is no such thing as a direct consequence of getting no stress fee ‘headroom’ eg it doesn’t suggest that debtors would default or face no prospect of re-fixing; however there may be much less certainty about affordability. Likewise, having some ‘headroom’ doesn’t assure {that a} borrower can afford the next mortgage fee. Moreover, the stress fee solely accounts for one factor of total mortgage affordability. Will increase in revenue enhance affordability, whereas value of residing pressures squeeze affordability.
Debtors are ‘pressured’ after they enter a mortgage
When making use of for a mortgage, potential debtors are topic to an evaluation that assessments whether or not they would be capable to meet their present and future mortgage funds in the event that they have been confronted with greater rates of interest sooner or later.
Most mortgages within the UK have a hard and fast fee for a time period, usually two to 5 years. As soon as this era involves an finish, debtors usually re-fix; nonetheless the speed obtainable at this level could also be completely different to their earlier one. And this will have a big effect on month-to-month funds – a 3 share level fee improve on a £300k mortgage would set debtors again by a further ~£500 monthly. So lenders ‘stress’ upfront whether or not debtors would be capable to proceed to afford their mortgages if charges have been to rise by the point they should re-fix. The dimensions of the ‘stress fee’ utilized by lenders is often decided by their prevailing Commonplace Variable Charge (SVR) and a ‘stress buffer’ that’s added on prime of this, which is topic to a minimal degree set by regulators. SVRs have a tendency to maneuver according to adjustments to the Financial institution Charge.
Evaluating common stress charges to mortgage charges
Mortgage charges have elevated considerably over the past two years. The theoretical ‘stressing’ of debtors’ capacity to afford their mortgages is now being examined in follow. Have been debtors coming to the tip of their mounted phrases over the past two years examined on the charges they confronted to re-fix?
Chart 1 reveals the common stress fee (orange line) throughout all mortgages coming to the tip of their mounted time period over 2022–23, for instance five-year fixes originated in 2017–18 and two-year fixes in 2020–21. The commonest merchandise in our pattern are two-year fixes. The typical stress fee is constructed based mostly on regulatory information submitted by lenders on the stress fee they utilized on every mortgage. The typical stress fee is comparatively secure throughout the interval as a result of on the level of origination SVRs have been low and secure. Common stress fee is plotted alongside the brand new mortgage fee obtainable (white line) for a person re-fixing with a two-year fixed-rate mortgage. The brand new mortgage fee is constructed based mostly on the common mortgage charges on provide at a variety of mortgage to worth ranges (from 60% to 95%) throughout lenders. The hole between the common stress fee and the brand new mortgage fee is the ‘headroom’.
Chart 1: Common stress fee versus new mortgage fee

Sources: FCA Product Gross sales Information and Financial institution of England calculations.
Will increase in mortgage charges since January 2022 imply that, on common, there may be much less ‘headroom’ between the charges debtors have been pressured at and the charges they confronted when exiting their mounted offers. Nevertheless, this ‘headroom’ has not been utterly depleted. This means that ‘stress charges’ utilized have been efficient on common in testing that debtors may afford the brand new greater charges they confronted on the level of re-fixing. When debtors re-fix with out a rise within the underlying principal, they aren’t topic to an extra affordability take a look at.
At greater mortgage charges the ‘headroom’ is smaller (and vice versa). The brand new mortgage fee relies on the common two-year mounted fee, which throughout 2023 was greater than the common five-year mounted fee, that means the ‘stress fee headroom’ could be greater if somebody was taking out a five-year deal. If prospects don’t re-fix they revert to lenders’ SVRs, that are greater than prevailing mounted time period charges, that means the ‘headroom’ could be decrease.
Distribution of debtors throughout stress charges
Whereas on common we discover a constructive ‘headroom’, issues could possibly be completely different for particular person debtors. Chart 2 reveals the distribution of mounted mortgages coming to the tip of their time period in 2023, grouped by stress fee and highlights the proportion (purple bar) that have been pressured under the common two-year mounted fee over 2023 (5.62%).
Chart 2: Stress charges for fixed-rate mortgages reaching maturity in 2023

Sources: FCA Product Gross sales Information and Financial institution of England calculations.
Observe: The primary bar captures all stress charges under the common two-year mounted mortgage fee over 2023 (5.62%). To coincide with the common mortgage fee, the second bar has a barely greater vary than different bars. The final bar captures all stress charges above 7.50%.
Our evaluation means that, regardless of the numerous improve in mortgage charges, solely 4.30% of all fixed-rate mortgages reaching maturity in 2023 have been examined at a stress fee decrease than the common two-year mounted mortgage fee over 2023 (5.62%). Nearly all of debtors would nonetheless have had some ‘headroom’ at mortgage charges of 6.50%, which was the very best level mortgage charges reached in 2023. As proven in Chart 2, stress charges for debtors exiting their fixed-rate intervals in 2023 are concentrated between 6.50% and seven.25%, so at mortgage charges above that degree, the variety of debtors with out the ‘headroom’ offered by the affordability take a look at would have elevated considerably.
Conclusion
The rate of interest debtors pay on their mortgage is a key factor of affordability, albeit not the one one. In our evaluation, we discover that the ‘stress’ evaluation carried out by lenders at origination will typically have subjected debtors coming to the tip of their fixed-rate phrases in 2023 to greater stress charges than the prevailing mortgage charges when re-fixing.
The broader implications of our evaluation on the housing market are laborious to disentangle, given the a number of components at play; one potential implication is that ‘stressing’ is prone to have helped restrict any pressured gross sales from affordability pressures. Total, our publish highlights the essential and never extensively acknowledged affect that ‘stressing’ might have had in supporting the resilience of particular person debtors and the general market.
Daniel Norris, Elio Cucullo and Vasilis Jacovides work within the Financial institution’s Prudential Framework Division.
If you wish to get in contact, please e mail us at bankunderground@bankofengland.co.uk or go away a remark under.
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