As very few leases will refer to fixed service charges, they will be variable and likely to increase with inflation every year. However, the service charge the leaseholder is required to pay must be reasonable and reflect the actual costs the landlord or manager has incurred.
As stated above, most leases will allow service charges to be payable in advance and the lease will usually specify the frequency and method of collecting service charges. It is unusual for a lease to require the full year’s service charge to be paid in advance in one lump sum and typically payments could be paid half-yearly, quarterly or monthly. The landlord or manager will be relying on the prompt payment of service charges in order to continue to provide all of the services that are set out in the lease.