Know what stays.
Anywhere.
A transparent, community-maintained fiscal regime calculator. Compare income tax, social contributions and take-home income without sending salary data anywhere.
Fiscal regime calculator
From gross revenue
to the number that matters.
Choose a jurisdiction, enter a scenario, then inspect every step. Italy mirrors your workbook’s regime comparison; other starter packs use simplified resident benchmarks.
Forfettario · 35% INPS reduction
Redditività 67% · Substitute tax 5%
burden13.5%
Mirrors the supplied workbook’s regime comparison, updated with the 2026 IRPEF middle rate (33%) and 2026 INPS artisan/merchant minimums. The Forfettario redditività coefficient, 5%/15% substitute rate and local surtaxes are editable.
Workbook model + Normattiva + INPS 2026Regime matrix
Same revenue.
Different rules.
Built from the same rows that make the Italian workbook useful: taxable base, contributions, tax, retention and monthly net.
| Measure | Professional | Business | ReducedBest net | Ordinary |
|---|---|---|---|---|
| Gross revenue | €75,000 | €75,000 | €75,000 | €75,000 |
| Taxable base | €37,150 | €37,941 | €42,249 | €55,448 |
| Social contributions | €13,100 | €12,309 | €8,001 | €19,553 |
| Income tax | €1,857 | €1,897 | €2,112 | €17,207 |
| Effective burden | 19.9% | 18.9% | 13.5% | 49.0% |
| Annual take-home | €60,042 | €60,794 | €64,887 | €38,241 |
| Monthly take-home | €5,004 | €5,066 | €5,407 | €3,187 |
Worldwide by design
A global index.
Built country by country.
Tax law is too important to fake. The atlas lists every sovereign country and exposes the maintenance status of each calculation pack.
Methodology
Every total should
show its working.
Each pack is plain TypeScript: dated thresholds, rates, social contribution rules, assumptions and source links. The browser computes the result; no salary data leaves the device.
- 01Gross revenue
Start with annual employment income or self-employed turnover in local currency.
- 02Taxable base
Apply the pack’s allowance, profitability coefficient or deductible expenses.
- 03Contributions + tax
Calculate social contributions, progressive bands, substitute tax and relevant surcharges.
- 04Take-home + audit trail
Return annual and monthly net, effective burden, eligibility warnings and primary sources.
OpenTax Atlas provides educational estimates, not tax, legal or financial advice. Residency, household status, deductions, tax treaties, local rules and filing choices can materially change the result. Verify against the linked authority and consult a qualified professional before acting.