How the Croatia godišnja naknada calculator is verified
Inputs
| Input | Field | Type |
|---|---|---|
| Obujam motora (ccm) | cc | 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) |
|---|---|---|
| Sourced | sourced | cc <= 2000 ? 1 : 0 |
| Godišnja naknada | tax | ($c := cc; $round($c <= 1000 ? $const.do1000 : $c <= 1600 ? $const.do1600 : $c <= 2000 ? $const.do2000 : $c <= 2500 ? 140 : $c <= 3000 ? 190 : 260, 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 |
|---|---|
do1000 | 38.4 |
do1600 | 79.6 |
do2000 | 95.6 |
Test vectors (3)
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 — C1 1.598 ccm — službeni iznos za razred do 1.600 ccm
given cc | 1598 |
|---|---|
expect sourced | 1 |
expect tax | 79.6 |
Case 2 — C2 998 ccm — najniži službeni razred
given cc | 998 |
|---|---|
expect sourced | 1 |
expect tax | 38.4 |
Case 3 — C3 2.900 ccm — iznad službeno objavljenih razreda, procjena
given cc | 2900 |
|---|---|
expect sourced | 0 |
expect tax | 190 |
Sources
- CVH tehnički pregled · checked 2026-08-05
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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