Why: the goal or problem

Keeping service available costs money even at zero usage, while heavy usage adds cost. One charge must account for both.

How: work toward a solution

A fictional workspace has three seats and 120 monthly exports. The monthly base is 20, including 100 exports; each extra export costs 0.10. Total: 20 + 20 × 0.10 = 22. Change usage: zero and 100 both cost 20; 101 costs 20.10. Taxes, fees and refunds are omitted.

Pay a base, then only for excess usage.

Illustrative example

Base fee plus overage

Initial workspace · 3 seats · 120 exports/month

Base 20 · includes 100 exports

Extra exports: 0.10 each

Total22.00

20.00 + 20 × 0.10 = 22.00

Fictional amounts. Taxes, fees and refunds omitted.

A fictional demo within this article. Reset or reload restores its initial state.

What: the concept

Base fee plus overage combines a fixed charge with included usage and a rate for excess units. The base remains payable even with no usage.

Combine with subscription billing.

Source