The amount of commission the agent can charge is basically what he can get away with without loosing business, but is usually in the region of what other agencies are charging in his area.

However, what he does charge should be clearly stated in the contract you signed with them at the begining, when you initially registered your property with them.  Often the charge covers a 12 month period, but if the tenant does not remain in the property for this amount of time, no charge would be levied to find a new tenant.

Hope this helps.  We only charge a fee to find a tenant, irrespective of how long the tenancy actually lasts.

We charge a fixed fee with a minimum fee of £200 or 50% of the first months rent whichever is the greater amount usually.