The best long-term interest for the moral actor (The person/organisation making the decision or taking an action)
Egoism is a Consequentialist theory so positive and negative consequences must be weighed up to assess an action's morality.
E.g. Lying on a resume:
Positives may include: getting the job, impressive resume etc.
Negatives may include: getting found out, guilt over lying, getting the job but not being able to perform, getting sacked, bad feelings from work colleagues who may have to 'carry' you Weigh up positives and negatives to assess morality of the action.