How the Canada registration calculator is verified
Inputs
| Input | Field | Type |
|---|---|---|
| Province | province | string |
| Fee if "Other" (CAD) | customFee | 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) |
|---|---|---|
| Province Fee | provinceFee | ($s := province; $s = 'ON' ? $const.feeON : $s = 'QC' ? $const.feeQC : $s = 'AB' ? $const.feeAB : customFee) |
| Annual renewal | tax | $round(provinceFee >= 0 ? provinceFee : 0, 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 |
|---|---|
feeON | 0 |
feeQC | 400 |
feeAB | 93 |
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 southern Ontario — no fee
given province | ON |
|---|---|
expect tax | 0 |
Case 2 — C2 Quebec (SAAQ) ~400 CAD
given province | QC |
|---|---|
expect tax | 400 |
Case 3 — C3 Alberta — about 93 CAD
given province | AB |
|---|---|
expect provinceFee | 93 |
expect tax | 93 |
Sources
- SAAQ · checked 2026-08-02
- Ontario.ca · 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.
← Back to the Canada registration calculator
Built with Valem — a live, verifiable calculator you can fork and embed.