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The Fee Calculator helps you preview how fees will be applied before running a real transaction. It uses the configuration of an existing Fee Package to estimate the total amount charged, including a detailed breakdown of each rule, flat fees, percentages, and more. This feature is especially useful when testing changes, validating logic with business teams, or integrating fee previews into your product UI.

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Accessing the Fee Calculator

To open the Fee Calculator:
1
Go to the Fees section in the Midaz Module sidebar.
2
Click the Calculator menu item.
3
The Fee Calculator page opens, allowing you to simulate fees for a given transaction.
You must have at least one Fee Package created before using the Fee Calculator. The simulator requires selecting a fee package to test against.

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Available action

From the Fee Calculator, you can:

Run a fee simulation

Simulate fee calculations before processing real transactions. Validate fee packages and understand how fees will be applied.

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Why use the Fee Calculator

The Fee Calculator is a read-only tool that does not affect the ledger or create any transactions. Use it to:
  • Validate new fee packages before enabling them in production
  • Test edge cases at minimum and maximum amount boundaries
  • Compare fee structures by running the same transaction through different packages
  • Document expected fees for finance teams or customers
  • Debug fee issues by reproducing scenarios and analyzing calculation breakdowns