The lender has reminded brokers that for self-employed cases submitted from 4 October, evidence of the most recent year-end cannot be for the 2017/2018 tax year. More up-to-date income evidence will be required.
In a statement posted on its website, Santander said that for all self-employed income evidence, the most recent year-end must not be more than 18 months before the date of the application.
Santander is also cutting rates on a trio of fee-free products for purchase and remortgage from 3 October.
The 60 per cent loan to value (LTV) two-year fix has been cut by 0.1 per cent to 1.59 per cent.
Two five-year fixes at 60 per cent and 75 per cent LTV have also been cut by 0.1 per cent and 0.05 per cent respectively to 1.74 per cent and 1.89 per cent.