# Plans + Pricing

By Lauren

## Articles

- [How does prorated billing work at Air?](https://help.air.inc/en/articles/6189668-how-does-prorated-billing-work-at-air)
- [How is my workspace credit usage calculated?](https://help.air.inc/en/articles/14178867-how-is-my-workspace-credit-usage-calculated)
- [What do my credits pay for on Air?](https://help.air.inc/en/articles/14178909-what-do-my-credits-pay-for-on-air)
- [Do my credits roll over each month?](https://help.air.inc/en/articles/14178917-do-my-credits-roll-over-each-month)
- [I'm on an outdated Air plan, why do I have credits and how do they work?](https://help.air.inc/en/articles/14186261-i-m-on-an-outdated-air-plan-why-do-i-have-credits-and-how-do-they-work)
- [How do storage, credits, and plan limits work together?](https://help.air.inc/en/articles/14492298-how-do-storage-credits-and-plan-limits-work-together)
- [Where is my receipt?](https://help.air.inc/en/articles/3397318-where-is-my-receipt)
- [How do I know if I need to upgrade my Air subscription plan?](https://help.air.inc/en/articles/11100946-how-do-i-know-if-i-need-to-upgrade-my-air-subscription-plan)
- [What is prorated billing?](https://help.air.inc/en/articles/11729858-what-is-prorated-billing)
- [Why was my bill higher than expected?](https://help.air.inc/en/articles/11730409-why-was-my-bill-higher-than-expected)