You should check the amortization schedule of a typical 30 year fixed rate loan. You are paying nearly nothing but interest for about 10 years, THEN you start paying down the principal balance significantly more. The first ten years you are basically renting your property from the bank. When you refinance the property the amortization schedule starts all over again where you are barely paying down your principal balance. The banks always need their cut before you are allowed to build equity.