Rental yield
Rental yield is the amount of money a landlord receives in rent over the course of one year, expressed as a percentage of the amount of money invested in the property.
For example, if a buy-to-let investor buys a house worth £200,000 - and tenants pay £10,000 a year in rent - the rental yield on the property would be five per cent. i.e. return (£10,000) divided by investment (£200,000) multiplied by 100 (to turn it into a percentage).