Visit the income booster page on our website for more information about the income booster proposition.

We will factor income boosters' disposable income into our affordability calculations to increase the amount we can lend. Please note that we apply additional tests to make sure the owners are not excessively reliant on the boosters.

For the most accurate affordability figure please use our affordability calculator.

To preserve a first-time buyer’s stamp duty status, an income booster is not on the property deeds, but they are on the mortgage. This is structured like a Joint Borrower Sole Proprietor (JBSP) mortgage.

Income boosters are subject to the same credit checks, eligibility criteria, and evidence requirements as the owners, as detailed elsewhere in this guide. However, our ejector seat feature can be used to extend the term by removing boosters part way through the term so they do not exceed our maximum age criteria.

On mortgages up to and including 80% LTV, friends and family can act as income boosters.

On mortgages up to and including 95% LTV, only close relatives can act as income boosters.

If income boosters choose to contribute to the mortgage, this will be treated as a gift.

Income boosters:

• Are not allowed to reside in the property
• Must take independent legal advice (ILA) at their own cost before signing the home agreement

Note that all customers, including income boosters, are liable for the full mortgage repayment.