Overspending is spending more money than one can afford. It is a common problem when easy credit is available. The term overspending is also used for investment projects when payments exceed actual calculated cost.

the act of spending more money than you have or more than was planned or agreed: Failure to tackle government overspending and debt has undermined investor confidence. Last-minute shopping often leads to overspending.

Overspending can be defined as spending beyond one's means, possibly due to a sudden event, like a job loss, or a slow evolution of financial behaviors.