1. Proof of Income: Lenders often require bank statements to verify your income. They want to see regular deposits that reflect your earnings, especially if you are self-employed.

2. Financial Health: Bank statements provide insight into your spending habits, savings, and overall financial stability. Lenders use this information to assess your ability to manage monthly mortgage payments.

3. Assets and Reserves: Lenders may also review your bank statements to confirm you have enough reserves (savings) to cover the down payment, closing costs, and a few months of mortgage payments.

4. Transaction History: They will look for any large or unusual transactions that may raise concerns about your financial behavior.

5. Documentation: Typically, lenders will ask for the last 2-3 months of bank statements as part of the mortgage application process.

If you have specific questions about the mortgage application process or need assistance with a particular aspect, feel free to ask!