The amount of a home loan you can get on a 40,000 salary is determined by a variety of factors, including your credit score, existing debts, and expenses. Lenders typically use a formula that limits your monthly housing costs to approximately 28% of your gross monthly income. You could potentially qualify for a loan of up to 11-12 lakhs based on this, but its best to consult with a lender or financial advisor to get a more accurate estimate based on your specific circumstances.