Estates are sometimes charged on a percentage but the more usual is a minimum instruction fee with the rest of the fee depending on the complexity of the estate. The complexity or otherwise would be clear from the first consultation with the executor at which time the solicitor should be able to give a fairly clear indication. The fee can also vary depending on the abilities of the executor and their willingness to collect information themselves. Its like everything, some people want full service and are prepared to pay for it, others are happy to roll up their sleeves to save money.