Hi David..The tax benefits are seperately available for the interest component as well as principal component of the housing loans consumers. It is available for both consumers who have taken a loan to either buy or build a house. According to Income Tax Act, the upper limit of the interest payment deduction is at Rs. 1, 50,000 per annum. The amount should have been borrowed on or after April 1, 1999 to acquire or construct a residential property and it the acquisition or construction should be done within 3 years. The section 80C also allows tax benefits on principal repayments.