AzureDailyCostCompare

Overview

AzureDailyCostCompare is a tool designed to help you compare daily costs for Azure services across a specified billing scope between two consecutive months. The application provides a detailed report that highlights full-day cost differences by day and calculates running monthly averages, helping organizations monitor and understand cloud spending trends within their overarching billing context.

Sample Report

Day of Month       December           January            Cost Difference(USD)
1                  2800.89            2806.26            5.37
2                  1852.19            1834.37            -17.82
3                  1850.99            1830.96            -20.03
4                  1861.91            1814.77            -47.14
5                  1882.82            1834.32            -48.50
6                  1865.77            1872.07            6.30
7                  1831.34            1882.61            51.27
8                  1843.22            1873.93            30.71

Monthly Cost Averages                                                  Amount (USD)
----------------------------------------------------------------------------------
January average (for 8 days)                                             1834.91
December average (for 8 days)                                            1852.85
Month averages cost delta (January average minus December average)        -17.94
December full month average                                               2029.78

------ Data Reference Information ------
All costs in USD
A day's data is considered complete 4 hours after the end of the day in UTC time.
Daily cost data is complete up to end of the day 2025-01-08 in UTC timezone
The end of the day in UTC time is 08/01/2025 10:00:00 AM in local timezone of (UTC+10:00) Brisbane

This report was generated at 08/01/2025 6:17:17 PM (UTC+10:00) Brisbane
This report was generated at 08/01/2025 8:17:17 AM UTC

Features

• Billing Account Scope: Compare costs across subscriptions within a single billing account.
• Daily Cost Comparison: Compare the costs for each day between two months.
• Monthly Average Analysis: Calculate and display the monthly cost averages.
• Cost Delta Calculation: Highlight the difference in costs between the months.
• Flexible Date Handling: Generate reports for any specified reference date.

Requirements

• Dotnet Core Runtime 8 or higher
• Azure CLI (used for authentication)
• Azure Cost Management Permissions at Billing Account Scope

Azure Permissions

Needs testing\confirmation

Grant the account you wish to use either:

Reader or Billing Reader or Owner role in Azure

within Azure Cost Management + Billing - Access control (IAM)

Installation

1. Install .NET Runtime 8 or higher

   Install .NET Runtime - The .NET Runtime contains just the components needed to run a console app. https://dotnet.microsoft.com/en-us/download/dotnet

2. Install Azure CLI:

   https://learn.microsoft.com/en-us/cli/azure/install-azure-cli

3. Authenticate using Azure CLI:

   az login

   https://learn.microsoft.com/en-us/cli/azure/authenticate-azure-cli-interactively

4. Install via dotnet tool command

   dotnet tool install --global azure-daily-cost-compare

Upgrading

When there is a new version available on NuGet, you can use the dotnet tool update command to upgrade:

dotnet tool update --global azure-daily-cost-compare

Usage

Command-Line Options

Description:
  Azure Daily Cost Comparison Tool

Usage:
  azure-daily-cost-compare [options]

Options:
  --date <date>   Optional reference date for the report (format: yyyy-MM-dd). If not provided, the current date will be used.
  --version       Show version information
  -?, -h, --help  Show help and usage information

Example Command

azure-daily-cost-compare

This command generates a cost comparison report using today as the reference date.

Example Command with Specific Date

azure-daily-cost-compare --date 2025-01-28

This command generates a cost comparison report using 2025-01-28 as the reference date.

Notes

• Data Accuracy: Cost data is considered complete 4 hours after the end of the day in UTC.

License

This project is licensed under the Apache-2.0 license.