Can be used for a primary home, second home or investment property. Technically, the answer to that question depends on the type of investment property, your credit-worthiness, and your down payment. Type of investment property Typical rate increase Market interest rates sample Interest rate for investment property sample 1 unit 0. Or you can simply look at all the lender rates without including any personal data. Investment property credit score requirements When you finance an investment property, lenders generally want to see better credit than they do for primary residence buyers. If you are buying a unit and can live in one of the units, you can use an FHA loan with as little as 3.