0 an extra amount of money that you have to pay for using more of something than was expected or agreed:
With overage charges, she has had cell phone bills of $140 a month.
If energy costs increase, tenants have to pay overage charges to cover the difference between the current rate and the rate when they signed their lease.
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
overage charge