YOUR ASSUMPTIONS, MADE EXPLICIT

A local workspace for tax rules.

Create, validate, and simulate your own declarative profile. Imported files never become reviewed or trusted packs.

The starting brackets are fictional arithmetic examples, not any country’s tax rates. Replace them with your own verified inputs. This calculator has no published statutory packs.

Profile details

Profile name

Version

Fiscal year label

Country / region (optional)

ISO currency

Effective from

Effective to

Input pay frequency

Rounding precision

Source / provenance notes

Calculation method

Tax brackets

Lower inclusive, upper exclusive. Leave the final upper bound blank for unlimited income. Bands must be contiguous. Rates are percentages.

Lower

Upper (blank = ∞)

Rate %

Fixed base

Lower

Upper (blank = ∞)

Rate %

Fixed base

Lower

Upper (blank = ∞)

Rate %

Fixed base

Taxable allowance

Employee contribution %

Contribution basis cap (0 = no cap)

Taxable basis = max(0, gross − allowance). Contribution is a separate percentage of gross, capped before applying the rate. Tax and contribution round separately, half-up.

Simulate this profile

monthly income (USD)

Calculation date

User-configured net estimate · v1.0USD 2,300.00

Taxable basisUSD 2,500.00

TaxUSD 200.00

Employee contributionUSD 0.00

Net estimateUSD 2,300.00

Progressive slices

1000 × 0%USD 0.00

1000 × 10%USD 100.00

500 × 20%USD 100.00

Monthly profiles only. The project preserves a user-configured calculation snapshot; later amount edits never silently recalculate it.

Input frequency must match the profile. No annualization, refund allocation, or statutory eligibility checking is performed.

Your test cases

The initial expected values apply only to the fictional starting profile. Changing a profile does not rewrite your expected results.

Test income

Expected tax

Test income

Expected tax

Test income

Expected tax

Expected tax for new test