• AWS TCO 
• Monthly AWS Invoice 
• AWS Billing console  
• AWS Cost Explorer 
• AWS Budget 
• 3^rd party tool AWS Billing file analysis, DIY dashboard 

AWS TCO 

AWS helps you reduce a comparative Total Cost of Ownership (TCO). TCO is the comparative total cost analysis, the operating cost, running in your infrastructure on the AWS environment, and running your infrastructure in the traditional on-premises environment.
AWS helps you to reduce TCO by reducing the need to invest in large capital expenditure and providing a pay-as-you-go model that empowers users to invest in the capital you need. TCO provides a detailed set of reports. TCO is a projection of the direct and indirect cost of purchasing a product or services
 TCO calculators allow users to estimate the total cost savings when using AWS and provide a detailed set of reports. The TCO calculator also gives you the option to modify assumptions that best meet your business needs.
The TCO Calculator guides on possible realized savings when using AWS. This tool is built on a calculation model that generates a fair cost of value that a customer may achieve. This tool is for approximation purposes only.
Lowering TCO 

• Reduce over-provisioning – Pay only for what you use 
• Choose the right pricing model 

The TCO Calculator automates the task of selecting the right AWS instance type based on the information you provide. You can describe your physical or virtual infrastructure in detail, and the calculator will provide the equivalent AWS instance types that meet requirements.
You can download a cost breakdown report or store in Amazon S3 and share it with others. It provides a comprehensive & detailed cost breakdown. 

Monthly AWS Invoice 

Viewing your monthly charges:
When you select a one-time fee to incur AWS charges the credit card and issues your invoice as pdf, you can also download the pdf from Billing and Management console using the below measure.
Note: 
IAM users need explicit permission to see some of the pages in the Billing and Cost Management console.
To view your monthly charges: 

• In AWS Management Console, open the Billing and Cost Management console at the below link https://console.aws.amazon.com/billing/home#/. 
• choose Bills In the navigation pane,  
• For the Date, select a month. 
• The Summary section shows a summary and detailed information of the charges for that month.  
• If you are using the consolidated billing feature in AWS Organizations, In the Bills page, it shows the lists for totals for all accounts on the Consolidated Bill Details Tab. Select the Bill Details by Account tab to watch the activity for each user account in the organization. 

To view your Billing charges for a different month: 

• Go on the Bills page, select the month you want from the Date list. 

To download a copy of your billing charges as a PDF document: 

• From the Bills page, select a month from the Date list for which all activity is closed. 
• From the Summary tab, select Usage Charges and Recurring Fees. 
• Choose the Invoice <invoiceID> link. 

To download a monthly Billing report: 

• Choose the Download CSV button and then select the appropriate option. 

Getting an Invoice Mailed to you
Follow the below steps to have a PDF copy of your monthly invoice sent to the email address associated with your account.
To edit your email recipients, see Editing Contact Information.

• Log in to the AWS Management Console and open the Billing and Cost Management console at https://console.aws.amazon.com/billing/home#/. 
• Choose Billing preferences on the navigation pane. 
• Select the Receive PDF Invoice by an Email checkbox. 
• Choose Save preferences. 

Note: The PDF invoice is difficult from a tax invoice. The Tax invoice is specially for your tax charges, whereas PDF invoices show your monthly AWS charges.
When AWS bill will be ready, and an invoice/bill will be charged?
Your AWS bill/Invoice for the previous month is finalized and ready at the beginning of each month. Shortly after, the bill/Invoice is charged to your default payment method, usually between the 3rd and the 5th day of the month.
If you are using the Cost and Usage Report, check the bill/InvoiceID column there. The bill/InvoiceID column is blank until your bill is finalized. 

AWS Billing Console 

AWS Billing and Management console provide features and a dashboard to view and manage your costs and usage.
The following are the steps to discuss the most common tasks that you’re likely to perform when using the Billing and Cost Management console. 

• Review your AWS Usage 
• Turn on Reports 
• Download or Print Your Bill 
• Set Up Budgets to Monitor Your Account 

AWS Cost Explorer 

AWS Billing and management includes Cost Explorer for a deeper dive into AWS Cost and usage. AWS Cost Explorer lets you visualize, understand, and manage your AWS costs and usage over time. If you have multiple AWS accounts within an AWS organization, cost will be consolidated in the master account. 

• Use Forecasting to get an idea of future costs. 
• Choose if you want to verify your data at a monthly or daily level of granularity. It helps you to visualize your day to day costs in AWS. 
• Use filter and grouping functionalities to dig even deeper into your data. 

Enable Cost Explorer
You can enable Cost Explorer for your AWS account using the Billing and Cost Management console, but you can’t enable Cost Explorer using the API. When you allow Cost Explorer, AWS prepares the report about your costs for the current month and the last three months and calculates the forecast for the next three months. The current month’s data is available for you for viewing in about 24 hours. The rest of the data will take a few days longer. Cost Explorer updates your cost data report at least once every 24 hours.
By default, you can launch Cost Explorer if your account is a member account in an organization. The Master or root account can, however, block your access.
Note:
An account’s status within an organization affects what cost and usage data is visible: 

• When a single account joins an organization, the account no longer has access to price and data usage from the time range, when the user account is standalone. 
• If a member account left the organization A to join organization B, the member account will no longer has access permission to cost and usage data from the time range when the user account was a member of organization A. The member has access only to the data that is generated as a member account of organization B. 
• If an account rejoins an AWS organization that it previously belonged to, the account regains access to its previous(historical) cost and data usage. 

Signing up to Cost Explorer and receive the AWS Cost and Usage data Report or the Detailed Billing Data doesn’t automatically enable Cost Explorer. You must enable it by performing the below procedure.

To Enable Cost Explorer 

• In AWS Management Console, sign in and open the Billing and Cost Management console at https://console.aws.amazon.com/billing/home#/. 
• On the navigation pane, select Cost Explorer. 
• On the Cost Explorer page, choose Enable Cost Explorer. 

AWS Budget 

AWS Budget creates a custom cost usage budget to track AWS cost, and usage. Use of AWS Budget to set the custom budget that alerts you when your costs or usage exceed (or a forecasted to exceed) your budgeted amount. Also, use the AWS budget to set reservation utilization or coverage target and receive alerts when your utilization drops below the defined threshold. AWS Budgets give you the ability to set up the alert if you exceed or are approaching your defined budget. 

• Create Cost, Usage or Reservation Budget, can be tracked at the monthly quarterly or yearly levels, with customizable start and end dates 
• Alerts support EC2, RDS, Redshift, and Elastic Cache reservations. 
• Budget based on fixed cost or plan your upfront based on your chosen level 

Feature: You can create up to 5 alerts each budget and each alert can notify up to 10 email recipients as well as publish to SNS.
AWS Budgets information is updated three times a day. Budgets track your unblended costs, refunds, subscriptions, and RIs. You can create the types of budgets given below: 

• Cost budgets –Plan how much you want to spend on a service. 
• Usage budgets–Plan how much service you want to use one or more. 
• RI utilization budgets –Define a utilization threshold and receive budget alerts when your RI usage drop below that threshold. This will show if your RIs are under-utilized or unused. 
• RI coverage budgets –Define a coverage threshold and receive budget alerts when the number of your instance hours that are covered by RIs drop below that threshold. This shows how much of your instance usage is covered by a reservation. 
• Savings Plans utilization budgets –Define a utilization threshold and receive budget alerts when the usage of your Savings Plans drops below that threshold. This shows if your Savings Plans are under-utilized or unused. 

For per master account you can create up to 20,000 budgets or AWS Organizations standalone account. The first 62 days of budget are free of charge for each month. For regular accounts, each additional budget day costs $0.02.

AWS Trusted Advisor

AWS says that AWS Trusted Advisor is an online tool that provides you real-time guidance to help you to provide your resources AWS best practices and can reduce Instance performance Improve security.
Five categories and seven cores Trusted Advisor checks
Optimized your AWS infrastructure with the five types of trusted advisor 

• Cost Optimization 
• Performance 
• Fault Tolerance 
• Security 
• Service limit 

All AWS customer gets the access of seven cores Trusted Advisor checks:
Business support and Enterprise support customers get full access to the complete set of Trusted Advisor checks and recommendations. These checks help optimize your entire AWS infrastructure, security, and performance, reduce overall cost and monitor service limits.

AWS Tagging

AWS-generated tags are tagging that AWS defines, and used to supported AWS resources for cost allocation purposes. To use an AWS generated tags, a master account owner must activate it in cost and management console for cost allocation tagging.

User-Defined tags are the tags that you define, create, and apply to resources. After you have created and applied it, you can activate them in the Billing and cost management console for cost allocation tagging.
AWS makes it easy to modify the tags to meet your changing business requirements. Remember to include future-plans for billing reports, automation, and access control in your tagging strategy
Tagging provides several benefits 

• Automation (Autoscaling, Scheduling) 
• Control and compliance (IAM policies) 
• Cost allocation (reporting and chargebacks)