Methodology

Financial maths that
can be inspected.

Our release process verifies the formula, rules, sources and interface separately before a calculator becomes publicly available.

Define the scope

Each tool starts by stating what it calculates, what it excludes and where the result applies.

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Financial logic stays outside the interface as pure functions, producing the same output for the same input.

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Official examples, independent hand checks and edge cases become repeatable unit tests.

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Rates, thresholds, tax tables and fees live in dated data configuration with a named source.

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Every output includes the main assumptions, applicable limits and a general-information disclaimer.

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Release gate