What is the appropriate amount to charge for an additional tenant in a rental property?

The appropriate amount to charge for an additional tenant in a rental property is typically determined by the landlord and should be outlined in the lease agreement. This amount can vary depending on factors such as the local rental market, the size of the property, and any additional costs incurred by the landlord due to the extra tenant. It is important for both parties to agree on this amount before the tenant moves in.