Jurisdictions and tax years

Jurisdiction and tax year are calculator context values. They are not separate top-level route families.

When this matters

Pass context when you need a specific supported tax year or want metadata filtered to a jurisdiction. Do not default tax-significant context in your application unless the owning schema defines that default.

How it works

json
{
  "facts": {
    "taxableIncome": { "_tag": "Money", "cents": 9000000, "currency": "AUD" }
  },
  "jurisdiction": "AU",
  "taxYear": "2025-26"
}

The calculator package composes supported jurisdiction and tax-year literals from rule packages. Unsupported combinations return a CalculatorServiceError.

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