Anyone considering investing in Real Estate or buying a Real Estate Property must be interested in what return the property will give them. In other words, he or she must be interested in Yield. A yield is a measurement of income return on an investment. It is generally calculated annually as a percentage, based on the asset (or investment) cost or market value. Yield is an important way of measuring the future income on an investment. This is because the return you get now and in the future is a key factor in working out whether to invest in a particular investment venture or not.