How the Romania salariu net calculator is verified

Inputs

InputFieldType
Salariu brut / lună (RON)grossMonthlynumber

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)
CAS (25%)cas$round(grossMonthly * $const.casRate, 2)
CASS (10%)cass$round(grossMonthly * $const.cassRate, 2)
Tax BasetaxBase$round(grossMonthly - cas - cass, 2)
Impozit (10%)tax$round(taxBase * $const.taxRate, 2)
Net / lunănetMonthly$round(grossMonthly - cas - cass - tax, 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
casRate0.25
cassRate0.1
taxRate0.1

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 — S1 6,000 RON single

given grossMonthly6000
expect cas1500
expect cass600
expect taxBase3900
expect tax390
expect netMonthly3510

Case 2 — S3 15,000 RON

given grossMonthly15000
expect cas3750
expect cass1500
expect tax975
expect netMonthly8775

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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