| AWS Service | Configuration Unit | Rate / Unit | Monthly Total (USD) | Share (%) |
|---|
Understanding AWS Cloud Infrastructure Pricing
Amazon Web Services (AWS) operates on a pay-as-you-go model, allowing organizations to scale compute, storage, and database services dynamically. Calculating cloud infrastructure costs requires accounting for several core building blocks:
Key AWS Cost Components
- Amazon EC2 (Elastic Compute Cloud): Virtual machines billed per second or per hour based on CPU cores, RAM size, OS licensing, and purchasing models (On-Demand, Savings Plans, or Spot Instances).
- Amazon EBS (Elastic Block Store): Persistent block storage volumes attached to EC2 instances. Standard General Purpose SSD (gp3) volumes are charged at approximately $0.08 per GB-month.
- Amazon S3 (Simple Storage Service): Scalable cloud object storage for files, backups, and media, billed at ~$0.023 per GB-month for Standard storage.
- Amazon RDS (Relational Database Service): Managed SQL databases (MySQL, PostgreSQL, MariaDB, SQL Server) including automated backups and multi-AZ replication.
- Data Transfer Out: Bandwidth sent from AWS servers out to the Internet, billed per GB after the first 100 GB/month free tier allowance.
On-Demand vs. Savings Plans Comparison
Choosing the right commitment plan significantly reduces recurring monthly AWS operational expenses:
| Pricing Model | Term Commitment | Average Discount | Best For |
|---|---|---|---|
| On-Demand | None (Hourly) | 0% (Standard Rate) | Short-term tests, unpredictable workloads, prototyping |
| 1-Year Compute Savings Plan | 1 Year Commitment | ~30% – 40% Off | Stable production web servers and steady business apps |
| 3-Year Compute Savings Plan | 3 Years Commitment | ~55% – 72% Off | Long-term core database servers and enterprise systems |
Frequently Asked Questions (FAQs)
How does AWS EC2 pricing work?
AWS EC2 instances are charged per second or per hour based on instance type (CPU/RAM specs), region, and pricing model (On-Demand, Reserved Instances, or Savings Plans).
What is the difference between On-Demand and Reserved Instances?
On-Demand instances let you pay for compute capacity by the hour with no long-term commitment. Reserved Instances (RIs) and Savings Plans require a 1 or 3-year term commitment in exchange for up to 72% cost savings.
How is Amazon S3 storage billed?
Amazon S3 charges based on the total Gigabytes (GB) of data stored per month, storage tier (Standard, Infrequent Access, Glacier), and incoming/outgoing API request counts.
Does AWS charge for Internet Data Transfer?
Inbound data transfer into AWS is free. Outbound data transfer out to the Internet is billed per GB after the first 100 GB/month free tier.