How the Latvia mikrouzņēmuma nodoklis calculator is verified

Inputs

InputFieldType
Annual revenue (EUR)annualRevenuenumber

The formula

Each derived value below is computed by the Valem engine from the expression shown, in this order. Nothing else runs — there is no hidden code path.

Derived valueFieldFormula (JSONata)
Microenterprise tax (25%)microTax$round(annualRevenue * $const.metRate, 2)
Net income / yearnetIncome$round(annualRevenue - microTax, 2)
Cap ExcesscapExcess$round($max([0, annualRevenue - $const.capRevenue]), 2)

Rates and thresholds

The expressions above read these as $const. They are the figures the annual refresh replaces, so they live as data rather than being written into the formulas — which is what makes a year-on-year change a one-line diff instead of an edit to arithmetic.

ConstantValue
metRate0.25
capRevenue40000

Test vectors (2)

Every case is executed against this model on each build, by the Java engine and independently by a JavaScript one. A mismatch of a single cent fails the build, so the page cannot ship advertising a figure the model no longer produces.

Case 1 — 25,000 EUR revenue, within the microenterprise cap

given annualRevenue25000
expect microTax6250
expect netIncome18750
expect capExcess0

Case 2 — revenue above the 40,000 EUR cap

given annualRevenue45000
expect microTax11250
expect netIncome33750
expect capExcess5000

Sources

Check it yourself — and reuse it

The whole model as JSON — inputs, outputs, formulas, vectors and sources in one re-runnable document.

This model is published under CC BY 4.0: use it, adapt it, build on it, with attribution. The licence covers the model — the expression of each rule and the arrangement of the catalog. The rates and thresholds are law, and nobody licenses those; the sources above are where they come from.

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