Use 'per head' when discussing the cost of an event or service for each person attending.

Event Costs

Mention 'per head' to clarify that each person in a group needs to pay individually.

Group Payments

Use 'per head' for budgeting events or meals to calculate total costs.

Use 'per head' in the context of buying or selling individual animals, typically in agriculture.

Farmers calculate profits 'per head' to determine the financial health of their livestock business.

Indicate value 'per head' to compare the worth of different types or breeds of animals.