About QuantoNetto.Com

What it calculates

Starting from a RAL (retribuzione annua lorda), the calculator works down through the same steps a payroll office does: INPS employee social contributions, taxable income, gross IRPEF across the national brackets, the employment tax credit, the cuneo fiscale relief, the trattamento integrativo, family credits for dependent children, and finally the regional and municipal surtaxes of the specific comune you choose.

Municipal surtaxes are calculated using the schedules available in the source dataset. Italian comuni set their own addizionale, often with an exemption threshold and sometimes with brackets of their own, so two identical salaries in two neighbouring towns can produce different net pay. Unpublished rates and carried-forward schedules are flagged in the result.

Beyond the basic case it models the payroll features that actually move the number: fixed-term and apprenticeship contracts, company size and redundancy funds, the impatriati regimes, complementary pension contributions, fringe benefits and meal vouchers, productivity bonuses, part-year employment and other income.

How the number is produced

There is exactly one calculation path in this application. The page you look at, the shareable URL, the in-page agent tools and the MCP server all run the same pure engine against the same versioned rule bundle. An answer given to an AI agent and the receipt on your screen cannot disagree, because they are the same computation.

The marginal rate is measured rather than assembled. Adding a headline bracket rate to a contribution rate gives the wrong answer almost everywhere in Italy, because tapering credits, cliff exemptions and whole-income rate switches all bite at different incomes. So the engine runs the entire calculation twice, a hundred euro apart, and reports what actually happened.

Where the data comes from

Regional and municipal surtax schedules come from the Italian Dipartimento delle Finanze open data, retrieved on 2026-09-05 and checksummed. National rules follow the 2026 IRPEF framework. Each result links the sources behind it, and the agent tools return the same list.

Some comuni have not published a 2026 rate at the time the data was retrieved. Those results carry the previous year forward, are marked as estimated, and say so in the warnings rather than quietly presenting a stale figure as current.

What it is not

• Not tax advice. It is an estimate for orientation, and it does not replace a commercialista.
• Employment income only. Not partita IVA, not regime forfettario, not pension income.
• Tax year 2026 only.
• Not a payroll system. The employer-cost figure is a partial reference, neither a minimum nor a total.

Who makes it

Built and maintained by Lorenzo Schiavone. If a rate looks wrong for your comune, that is worth reporting - see the contact page.