How the Georgia net salary calculator is verified
Inputs
| Input | Field | Type |
|---|---|---|
| Gross monthly (GEL) | grossMonthly | number |
| Pension participant | participant | boolean |
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) |
|---|---|---|
| Pension (2%) | pension | $round(participant ? grossMonthly * $const.pensionRate : 0, 2) |
| Income tax (20%) | incomeTax | $round((grossMonthly - pension) * $const.taxRate, 2) |
| Net / month | netMonthly | $round(grossMonthly - pension - incomeTax, 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 | 0.02 |
taxRate | 0.2 |
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 3,000 GEL participant
given grossMonthly | 3000 |
|---|---|
given participant | yes |
expect pension | 60 |
expect incomeTax | 588 |
expect netMonthly | 2352 |
Case 2 — S2 3,000 GEL non-participant
given grossMonthly | 3000 |
|---|---|
given participant | no |
expect pension | 0 |
expect incomeTax | 600 |
expect netMonthly | 2400 |
Sources
- Revenue Service (rs.ge) · 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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