When you apply for a mortgage, you have to demonstrate your income. If you are an entrepreneur or self-employed, your income may be deemed insufficient under the usual mortgage approval process. For example, if you apply lump-sum deductions in your tax return, your actual income may be undervalued. A turnover mortgage will take into account the specific tax aspects of your business. In this way, you can obtain a loan even if you would not be eligible for a regular mortgage.