Read the full explanation of what a MOP contract is? The agreement between the meter operator costs between £250.00 and £500.00 per year, depending on factors such as the meter operator and the type of meter. As a rule, a separate fee is levied for communication, which varies from region to region. 2. – Numerator Operator Contract All half-hour meters require a meter operator, also known as MOP agreement. This includes delivery and routine maintenance of the meter. The annual cost of the MOP varies depending on the type of meter and the duration of the contract. The annual cost is less than £200 to 800+. The longer the contract, the worse the price. The most common type of MOP contract leads you for a five-year contract of £250/year. .