This depends on what the lender wants. Collateral is an asset that a lender accepts as security for the loan. If you cannot pay back your loan, the lender has the right to take the collateral and sell it for cash. Some examples include real estate, your business inventory, and personal savings.[i]
In addition, note that most loans have interest rates, which means you have to pay back what you borrowed in addition to whatever the interest rate is. So, a 5% interest rate, means you will have to pay 5% of the total in addition to the money you borrowed. A $1000 loan for one-year at a 5% per annum simple rate requires paying back $1050.