TFN Generator

Generate valid Australian Tax File Numbers (TFNs) for testing purposes. Our TFN generator uses the standardized algorithm to ensure validity.

INPUT

Options

OUTPUT

Client Side
Important: This tool is provided for testing purposes only. It should not be used for any official or legal purposes.
Documentation πŸ“•

About Australian Tax File Number (TFN) Generator

The TFN Generator is a tool designed to generate valid Australian Tax File Numbers (TFNs) for testing purposes. TFNs are unique numbers assigned to individuals and organizations for tax purposes in Australia. The generator uses a standardized algorithm to ensure the generated TFNs are valid.

How does it work?

The verification algorithm embedded in the TFN is known as a check digit algorithm. Each digit of the TFN is multiplied by a specific weight, and the sum of these products should be a multiple of 11. If the sum is not a multiple of 11, the TFN is considered invalid.

Here’s an example calculation for the TFN 123456782:

1   2   3   4   5   6   7   8   2
x   x   x   x   x   x   x   x   x
1   4   3   7   5   8   6   9   10
=   =   =   =   =   =   =   =   =
1 + 8 + 9 + 28 + 25 + 48 + 42 + 72 + 20 = 253

In this example, the sum is 253, which is a multiple of 11, making the TFN 123456782 valid.

Usage

  1. Specify the number of TFNs you want to generate (1-20).
  2. Click the “Generate” button to generate the TFNs.
  3. Copy the generated TFNs for use in your testing.

Disclaimer

This tool is provided for testing purposes only. It should not be used for any official or legal purposes.

Background and Sources

The TFN algorithm used in this tool is derived from publicly available information. While the exact algorithm is not publicly disclosed by the Australian Taxation Office (ATO), the check digit routine used to generate TFNs is widely known and could be regarded as in the public domain.

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