Rental charges take account of several factors. The principal one is the value of the instrument, but also in the equation are likely maintenance costs and other considerations. Charges are payable in advance at the level shown, by the calendar month, and by standing order, unless a different method is agreed. No VAT is to be added to any charges. An arrangement to rent an instrument for a minimum of one year is normally rewarded by a discount of approximately 5%. The minimum rental period is normally 3 months, payable on delivery.

An initial delivery / installation charge is usually required, and will normally be the equivalent of one month's rental-fee, plus an allowance for travel-costs. For example, a normal delivery to the London area for a small instrument will cost about £110.

Servicing: a visit by the supplier will usually carry a charge equal to one month’s rental fee. An annual service will usually require 1- 2 hours’ work, depending upon the instrument. This service may not always be required.

Servicing-work carried out by the supplier’s agent will be at the agent’s rate of charge. In London this is likely to be the same or less than above, due to the agent’s proximity.