Simple Log Service:How am I billed for usage that exceeds my resource plan quota?

If your usage exceeds the quota of your resource plan, the excess usage is billed on a pay-as-you-go basis.

For example, you purchase a one-year, 100 CU prepaid plan on December 1, 2022. If your Simple Log Service usage exceeds 100 CU in December 2022, the excess usage is billed on a pay-as-you-go basis.