When you declare personal income tax, the interest on the housing loan you pay can be used as one of the tax reduction items. In other words, if you buy a house and apply for a housing loan from the bank during the income tax year, you can deduct the loan interest paid before tax to reduce the income tax you should pay. The implementation of this policy is mainly to support and encourage people to improve their living conditions through buying houses and loans, and at the same time reduce their economic burden.