The amount of home loan you can get on a salary of 40,000 will depend on several factors such as your credit score, the type of loan you are applying for, the interest rate, and the lender's specific policies.

As a general rule, most lenders use a formula called the Debt-to-Income (DTI) ratio to determine the amount of loan you can qualify for. This ratio compares your total monthly debt payments to your monthly income. Typically, lenders prefer a DTI ratio of 43% or lower.

Assuming your DTI ratio is 43%, and you have no other debts, your maximum monthly mortgage payment (including principal, interest, taxes, and insurance) would be around $1,290.

Assuming an interest rate of 4% and a 30-year term, this would translate to a loan amount of approximately $247,000.

However, it's important to note that this is just an estimate and that the actual amount you can borrow will depend on several individual factors. It's always best to speak with a lender directly to get a more accurate assessment of your borrowing potential.