One free calculator per state, with that state's standard internal ICMS rate pre-filled. Add tax to a price or strip it out of a total — for all 26 states plus the Federal District, in Brazilian reais.
ICMS is Brazil's state-level tax on goods and listed services, and there is no single national rate: each state sets its own internal rate, most between 17% and 23%. Pick your state below — the calculator opens with that state's standard internal rate already entered, and you can type in a different rate if your item qualifies for one.
Two things the internal rate does not cover: sales to buyers in other states, which generally use the interstate rates of 7% or 12%, and tax substitution (ICMS-ST), where the tax is collected earlier in the chain. The calculators use the standard internal rate only — they do not compute interstate or substitution cases.
ICMS (Imposto sobre Circulação de Mercadorias e Serviços) is Brazil's state-level tax on the circulation of goods and on transport, telecom and other listed services. Each of the 26 states plus the Federal District sets its own standard internal rate, so the rate depends on where the sale happens.
ICMS is a state tax, not a federal one: each state government sets its own internal rate by law. Most states sit between 17% and 23% for the standard internal rate, and several raised their rates in 2023–2025 — so a rate you remember from a few years ago may no longer apply. Each calculator below opens with that state's current standard internal rate, verified in November 2026.
No. Sales to buyers in other states generally use the interstate rates of 7% or 12% instead of the internal rate, and tax substitution (ICMS-ST) — where the tax is collected earlier in the chain — changes who pays on some goods. These calculators use the standard internal rate only; for an interstate sale, type 7% or 12% into the rate field on the state calculator.
Yes — unlimited calculations, no signup, no watermark. Everything runs in your browser; nothing you type is uploaded anywhere.
Rates verified November 2026 · Sources: each state's Secretaria da Fazenda and the state legislation linked on each calculator.
