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When you make changes to your Air subscription mid-cycle—like upgrading plans, adding users, or increasing storage—you may notice a higher-than-expected invoice. This is often due to prorated charges or storage overages, which we explain below.
Prorated billing means you're only charged for the portion of your billing cycle that reflects recent changes. These changes can include:
Adding or removing users
Upgrading or downgrading your plan
Increasing or decreasing included storage
You'll only be charged for the time the plan or feature was active, not a full billing cycle.
🧾 Only pay for the time you use 🧾
Subscriptions are billed upfront (monthly or annually), so any mid-cycle change will create an adjustment on your next invoice. Air credits you for the time span that is not used on your previous plan if you upgrade. Air applies that credit to your renewal invoice. Air will also charge you for the time span that is used for the plan you chose to upgrade to. Air applies that charge to your renewal invoice. The difference between the credit and the charge at that time is what is called a proration charge.
📦 Storage Overages
A common reason for prorated charges is exceeding your plan’s storage limit. For example:
If your plan includes 2 TB of storage and you go over, additional storage charges may apply.
You can view your usage in Settings → Plan.
To avoid surprise costs, we recommend proactively managing your storage and user count ahead of your renewal date.
Check your renewal invoice for line items that reference the following:
Pro, Plus, Creator or Enterprise – Your monthly or annual subscription
Remaining Time – A prorated fee for added services
Unused Time – A credit for removed services
📌 Quick Refund Policy Reminder
Air does not offer refunds or prorated refunds for subscriptions paid in advance.
🧠 Example invoice with prorated charges
Let’s say your billing date is the 8th of each month:
On the 28th of this month, you upgrade from the $100/month Plus plan (legacy) to a $600/month plan.
Your next full charge of $600 will happen on the 8th of the next month.
Since your renewal date remains the same the next invoice will also include an approximate $180 charge to cover the ~10 days of access to the new plan and credit due for unused time on the previous plan between your upgrade and your billing date.
This shows up on your invoice as a Remaining Time charge and an Unused Time credit for the time you previously paid for the legacy plan.
Need help understanding a charge? Just message us or email help@air.inc—we’re happy to help!