AWS Pricing Models

AWS Pricing Models opens the Billing, Pricing, and Support domain. Before you can read a bill or pick a cost tool, you need to know how AWS sets a price in the first place: what you pay for, what you do not, and the levers that lower the number.

The topic stays practical. It covers the pricing rules that show up on the exam and the small set of choices, like how you buy EC2 compute, that move the cost the most.

What This Topic Covers

• the pay-as-you-go model and how billing tracks usage instead of a fixed plan
• the three fundamental cost drivers: compute, storage, and outbound data transfer
• the three ways to pay less: reserve capacity, use more, and turn idle resources off
• the AWS Free Tier and the AWS Pricing Calculator for estimating cost before you spend
• the five EC2 purchasing options (On-Demand, Savings Plans, Reserved Instances, Spot, and Dedicated Hosts) and which workload fits each
• how Amazon S3 and Amazon EBS storage are billed, including why a provisioned EBS volume costs the same whether you fill it or not
• the data transfer rule: inbound is free, outbound to the internet is charged

Why It Matters

Pricing questions are a steady part of this domain, and they reward a clear mental model over memorization. If you know the three cost drivers, the levers that lower a bill, and the data transfer rule, you can reason through most scenarios instead of guessing.

The same knowledge carries into real work. Choosing On-Demand versus a Savings Plan, or noticing that idle resources and outbound transfer are quietly adding to a bill, is the difference between a cloud budget that holds and one that drifts.