The invention relates to a method for monitoring a filter (3) of the fuel-supply system (1) of an aircraft engine, including: a step of detecting clogging of the filter, and a step of sending an indication message, characterised in that it includes: a step of determining a current phase among a plurality of consecutive phases of an aircraft mission, including at least one phase during which the clogging of the filter is not likely to be caused by ice and a phase during which the clogging of the filter is likely to be caused by ice, and in response to detecting clogging, a step of determining a type of clogging in accordance with said current phase, in which, during the step of sending an indication message, the message sent depends on the type of clogging.