Portfolio rental loans are a type of financing that allow real estate investors to borrow money to purchase or refinance multiple rental properties at once. Unlike traditional mortgages that are based on the borrower's income and credit score, portfolio rental loans are typically based on the cash flow and equity of the properties in the portfolio.

The terms of portfolio rental loans may vary depending on the lender, but they generally offer longer repayment periods and lower interest rates compared to traditional mortgages. They also typically require a larger down payment and may have stricter eligibility criteria, such as a minimum credit score or a certain number of rental properties in the portfolio.

Portfolio rental loans are often used by real estate investors who have a large number of rental properties and want to streamline their financing, reduce their monthly payments, or access cash for other investment opportunities. They can also be used to consolidate multiple loans into a single, more manageable payment.