How to read a cloud bill in ten minutes
A cloud invoice can run to hundreds of lines, and five of them usually carry most of the money: compute, storage, data transfer, managed services and the support plan. Read those five, compare them with the same month last year, and add the hours your own people spend running the account. You then have a number you can question and a short list of things to ask.
Start with the total, then group by service
Open the billing page for the month that just closed and write down the total. Then ask the console to group charges by service. AWS does this on its Bills page and in Cost Explorer, and Azure does it in Cost analysis. Ignore everything below the top five services for now.
| Line | What it pays for | The question to ask |
|---|---|---|
| Compute | Servers, by the hour they run | Which of these run all month, and does anyone use them at night? |
| Storage | Disks, backups and files | How much of this is old backups or copies nobody opens? |
| Data transfer | Data sent out to the internet | What is sending it, and to whom? |
| Managed services | Databases and other services the provider runs | Which product of ours needs each one? |
| Support plan | Access to the provider's engineers | Which plan are we on, and who opened a case this year? |
Data transfer is the line people miss
Cloud providers charge little or nothing to bring data in and charge by the gigabyte to send it out. AWS's price list sets internet transfer at $0.09 per GB for the first 10 TB a month, after a free 100 GB. Ten terabytes out in a month comes to $912.60 at that rate.
A rising transfer line usually means customers are downloading more, or a system outside the cloud is reading from one inside it. AWS egress fees shows how to find the source.
The support plan is a percentage of everything else
Paid support is priced as a share of the bill, so it grows whenever the bill does. On AWS Business Support+, a single account with $40,000 in monthly charges pays $3,000 for support: 9 percent of the first $10,000 and 7 percent of the next $30,000. Enterprise Support has a $5,000 monthly minimum. Those rates come from AWS's support pricing page, checked October 4, 2026.
Check which plan each account is on. What AWS support costs covers the plans in detail.
The cost that never shows on the invoice
Someone on your payroll patches the servers, tests the backups and reads this invoice. Estimate their hours in a month and multiply by what an hour of their time costs you. For a small company that figure is often the second largest line, and it appears on no bill.
What it costs to operate a cloud lists the recurring tasks so the estimate is more than a guess.
What to do with the numbers
Put this month beside the same month a year ago. A total that grew faster than your customer count deserves an explanation, line by line, from whoever runs the account. The worksheet What should my cloud cost? gives you one page to record the figures and the questions.
If nobody can explain the growth, bring the worksheet to a call with a consultant and we will go through it with you.