Consolidated Billing in AWS
Consolidated Billing in AWS is a feature that allows you to combine multiple AWS accounts into a single billing account, making it easier to manage and track your AWS costs and usage. This feature is particularly useful for organizations that operate multiple AWS accounts, as it simplifies cost management and enables you to take advantage of volume discounts, resource sharing, and more streamlined reporting.
? What is Consolidated Billing in AWS?
Consolidated Billing enables you to manage multiple AWS accounts under a single payer account while still maintaining the independence of each individual account. This structure allows for:
Simplified Invoicing: You receive a single, consolidated invoice for all your AWS accounts, making it easier to track and pay for usage.
Cost Optimization: All the accounts in the consolidated billing family are eligible for volume discounts and pricing benefits based on the combined usage of the linked accounts.
Resource Sharing: You can share certain AWS services (like Reserved Instances) across linked accounts to maximize savings.
Centralized Cost Tracking: Gain visibility into costs across multiple accounts using AWS Cost Explorer and detailed billing reports.
??? How Consolidated Billing Works
Payer Account:
The payer account is the master account that handles the billing and payments for the entire organization or AWS accounts. All linked accounts are billed through this payer account.
The payer account doesn’t incur charges for resources—it only handles billing and invoicing.
Linked Accounts:
Linked accounts are the individual AWS accounts that you want to consolidate. Each account is billed independently for its own resources, but the charges are combined under the payer account.
Each linked account can view its own usage and costs, but they cannot access billing data for other linked accounts.
Invoice and Payment:
AWS generates a single invoice that combines all the charges for the linked accounts under the payer account.
The payer account is responsible for making the payment, even though the charges may be spread across multiple linked accounts.
? Benefits of Consolidated Billing
1. Volume Discounts
AWS offers tiered pricing and volume discounts based on the combined usage of linked accounts. The more usage you have, the better the pricing you can get, including for:
Amazon EC2
Amazon S3
Amazon RDS
Amazon Lambda
And more!
For example, if one account is close to reaching a higher tier for a service, the combined usage across linked accounts can help achieve a better price.
2. Unified Billing Reports
You receive a single monthly invoice, simplifying the process of tracking costs and usage.
AWS provides tools like AWS Cost Explorer and AWS Budgets to analyze costs across all linked accounts, enabling better cost management and forecasting.
3. Sharing of Reserved Instances (RIs)
If you have Reserved Instances (RIs), you can share these discounts across linked accounts in the consolidated billing family. This can lead to significant savings if different accounts use the same types of services (e.g., EC2 instances) and are eligible for RIs.
This feature is available for EC2, RDS, and ElastiCache RIs.
4. Improved Budgeting and Cost Control
Consolidated Billing enables better financial control by allowing you to set budgets and track spending across multiple accounts.
You can allocate costs across linked accounts or resources, which helps you stay within budget and monitor cost trends more efficiently.
5. Simplified Tax Management
Consolidated Billing makes it easier to handle taxes, as you only need to manage tax documentation for a single payer account.
This centralization can be helpful for businesses that operate in multiple regions or have complex tax reporting requirements.
6. Centralized Management
You can centrally manage your AWS accounts under one payer account, which reduces administrative overhead and simplifies account management.
Linked accounts still retain their own identity, policies, and permissions, but you have a centralized view of your billing and payments.
?? How to Set Up Consolidated Billing
Step 1: Create an AWS Organization
Before you can enable consolidated billing, you must create an AWS Organization. This allows you to group multiple AWS accounts together under one management structure.
In the AWS Organization, the payer account is designated as the management account.
Step 2: Invite Linked Accounts
Once your AWS Organization is set up, you can invite other AWS accounts to be linked to your payer account. These accounts are referred to as linked accounts.
Linked accounts will receive an invitation, which must be accepted in order to link the accounts to the payer account.
Step 3: Manage Linked Accounts
You can manage the linked accounts, including adding or removing them, through the AWS Organizations console.
You can also set up organizational units (OUs) within your organization to group accounts based on different business units, departments, or projects.
Step 4: Monitor and Manage Costs
After setting up consolidated billing, use AWS Cost Explorer and AWS Budgets to monitor and manage your costs across all linked accounts.
You can generate cost and usage reports, track spending, and set up alerts to notify you when you’re approaching your budget limits.
? Security and Access Control
While Consolidated Billing enables centralized cost tracking and management, it doesn't change the security and permissions model for AWS accounts. Each linked account retains its security policies and permissions, so:
Payer account: The payer account only has access to billing and payment information.
Linked accounts: Linked accounts can still manage their own resources and security settings. They have visibility into their own billing data but cannot view billing data for other accounts unless you grant specific permissions.
If you want to give members of your organization access to billing data across accounts, you can use IAM roles to provide them with the necessary permissions.
? Tracking Costs Across Linked Accounts
AWS Cost Explorer:
Use Cost Explorer to analyze costs across all linked accounts, view trends, and identify cost anomalies.
You can filter by account, service, linked resources, and more to get detailed insights into your spending.
AWS Budgets:
Set up AWS Budgets to track your spending across the payer and linked accounts and get notifications when costs or usage exceed predefined thresholds.
Budgets can be set at both the account level and the service level.
Cost Allocation Tags:
Use cost allocation tags to tag your AWS resources with metadata, allowing you to allocate costs by project, department, environment, etc.
This can help track which linked account or resource is generating costs, providing detailed financial reporting.
? Summary of AWS Consolidated Billing
Consolidated Billing in AWS allows you to group multiple accounts under a single payer account for simplified billing and invoicing.
Benefits include volume discounts, cost-sharing (e.g., Reserved Instances), centralized cost tracking, and simplified tax management.
Setting up Consolidated Billing requires creating an AWS Organization and linking your accounts together under a management account (payer account).
Cost Explorer, AWS Budgets, and Cost Allocation Tags are key tools for tracking and managing your costs across linked accounts.
