Because we believe in a monthly recurring revenue model, we don't advocate charging your clients annually. However, there are circumstances where this may be applicable.
So annualising costs are useful if you have a client which you want to keep and who insists on paying for the whole year in one payment.
But the place it has a greater purpose, is if you're having to complete a previous year or more's work for new clients, before you can start working with them.
So this video explains exactly what they are and when to use them.