Having differentiated limits for FTBs and SSBs has been an important element of the Central Bank’s framework since its introduction. Having different limits for FTBs recognises the different roles played by first-time buyers and second/subsequent buyers in the house-buying cycle.
For example, first-time buyers are generally at an earlier point in the income lifecycle and are more likely to experience income growth during their mortgage, making their loans easier to sustain over time, and less risky for lenders. Second and subsequent buyers, by contrast, benefit from house price growth during their tenure as owners, which can be used during periods of house price growth to purchase more expensive properties.
However, when considering the rationale behind having different limits for FTBs and SSBs, a higher LTI limit for FTBs is a more effective way to differentiate between these borrowers. Given the growth in house prices relative to incomes since the measures were introduced, the LTI has become the clear binding constraint for a majority of borrowers. In addition, as FTBs are on average seven years younger than SSBs in recent years, income growth potential after mortgage origination is higher for FTBs. This greater earning potential allows a higher starting LTI to be sustained without the same risks to future borrower resilience.
A higher LTI limit for first-time buyers provides some support to these borrowers to access the housing market without unduly compromising the effectiveness of the measures.
The costs of the mortgage measures relating to challenges entering the mortgage market are also deemed to be higher for potential FTBs than potential SSBs. The differential treatment is supported by the fact that there is empirical evidence for higher default risk among SSBs than FTBs, for a given level of LTV or LT.