HI team, i want to calculate aws costing for particular instance for previous month

To calculate AWS costs for a particular instance for the previous month, you have a few options:

1. Using AWS Cost Explorer:

• You can use Cost Explorer to view cost data for the past 13 months at daily or monthly granularity.
• However, for resource-level data (like specific instance IDs), Cost Explorer only provides data for the last 14 days by default.
• To use this method, you need to enable resource-level data in the Billing & Cost Management Preferences for Cost Explorer.
• Once enabled, apply filters in Cost Explorer: Set Resource to "EC2-Instances" and select the specific instance ID you're interested in.

2. Using AWS Cost and Usage Reports (CUR):

• This is a more comprehensive solution, especially for data beyond the last 14 days.
• You can set up a Cost and Usage Report and query it using Amazon Athena.
• An example Athena query to get costs for a specific instance for a particular month would look like this:

SELECT line_item_resource_id as "Instance ID", SUM(line_item_unblended_cost) AS Cost FROM cost_and_usage_report WHERE line_item_product_code = 'AmazonEC2' AND Month = [your_month] AND Year = [your_year] AND line_item_resource_id = '[your_instance_id]'

• This query will give you the total cost for the specified instance for the month you're interested in.

Remember that the actual cost may vary based on factors like usage patterns, pricing changes, and any applied discounts or credits. It's always a good idea to review your bill thoroughly to understand all components of your AWS costs.
Sources
Exploring more data for advanced cost analysis - AWS Cost Management
Cost usage monthly report per instance | AWS re:Post

To calculate the cost of a specific AWS instance for the previous month, follow these steps:

1. Access AWS Cost Explorer

Go to the AWS Management Console.

Navigate to Billing > Cost Explorer.

2. Set the Date Range

In Cost Explorer, set the date range to cover the previous month.

You can do this by selecting Monthly view and choosing the specific month you want to analyze.

3. Filter by Instance ID

In the Filter section, you can select Usage Type, Instance Type, or Instance ID (if you're tracking specific instances).

Apply a filter for the EC2 Instance ID that you want to analyze.

4. Review the Cost Breakdown

Once filtered, you'll see the costs associated with that specific instance.

You can further break down the cost by services like EC2 usage, EBS volumes, and data transfer costs associated with the instance.

5. Download the Report

You can download the detailed billing report (CSV) for further analysis if needed. The report will include cost details for each resource, broken down by services, instance types, and regions.

By using Cost Explorer, you can track down the costs incurred by your specific EC2 instance for the previous month and analyze any trends or spikes in usage.