How the Croatia neto plaća calculator is verified
Inputs
| Input | Field | Type |
|---|---|---|
| Bruto plaća / mjesec (EUR) | grossMonthly | number |
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 value | Field | Formula (JSONata) |
|---|---|---|
| Mirovinsko (20%) | pension | $round(grossMonthly * $const.pensionRate, 2) |
| Porezna osnovica | taxBase | ($b := grossMonthly - pension - $const.allowance; $round($b > 0 ? $b : 0, 2)) |
| Porez i prirez | tax | ($b := taxBase; $round($b <= $const.threshold ? $b * $const.lowerRate : $const.threshold * $const.lowerRate + ($b - $const.threshold) * $const.higherRate, 2)) |
| Neto / mjesec | netMonthly | $round(grossMonthly - pension - 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.
| Constant | Value |
|---|---|
pensionRate | 0.2 |
allowance | 600 |
lowerRate | 0.23 |
higherRate | 0.33 |
threshold | 5000 |
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 1,800 EUR, Zagreb
given grossMonthly | 1800 |
|---|---|
expect pension | 360 |
expect taxBase | 840 |
expect tax | 193.2 |
expect netMonthly | 1246.8 |
Case 2 — S3 7,000 EUR
given grossMonthly | 7000 |
|---|---|
expect pension | 1400 |
expect taxBase | 5000 |
expect tax | 1150 |
expect netMonthly | 4450 |
Sources
- Porezna uprava · checked 2026-08-02
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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