The Capitalization Rate (also known as “Cap Rate”) is used to compare an income property with other similar income properties. It can also be used to place a value on a property based on the income it generates.
The Cap Rate merely represents the projected return for one year as if the property was bought with all cash. But since we don't normally buy property using all cash we would use other measures, such as the cash-on-cash return, to evaluate a property's financial performance.