There are many variables to a mortgage payment. The five basic distributions of a mortgage payment are: 1. Principle. 2. Interest. 3. State / local property tax. 4. Property mortgage insurance (less than 20-25% down). 5. Homeowners insurance. When purchasing a property, it is wise to consider all these variables when calculating your total buying power. Investment properties require more than 20-25% as a down payment. For further clarification check with your lending agency.