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Rio Grande do Norte ICMS Calculator

Buying or selling in Rio Grande do Norte? ICMS starts with the standard internal 20% rate. Calculate it exactly here — free, in your browser, no signup. The rate rose from 18% to 20% on 20 March 2025.

Rio Grande do Norte ICMS Calculator

Results update live as you type. Amounts in BRL. Nothing leaves your browser.

Standard internal rate: 20% — The rate rose from 18% to 20% on 20 March 2025.

Your Numbers
“Add tax” starts from a net price. “Remove tax” works backwards from a total that already includes tax. This is the STANDARD INTERNAL rate in Rio Grande do Norte — This is the state's standard internal rate for most goods and services. Reduced tax bases, exemptions and tax substitution (ICMS-ST) can change the effective tax on specific items, and sales to buyers in other states generally use the interstate rates of 7% or 12% instead — this calculator does not cover those cases. If a different rate applies to your item, type it into the rate field. If you know a different rate applies to your item, type it into the rate field.
Your result
0.00
total including tax
Net amount (before tax)0.00
Tax amount0.00
Gross amount (with tax)0.00
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Internal rate verified November 2026 · Source: SEFAZ-RN — Comunicado: alteração da alíquota modal para 20%

How to calculate Rio Grande do Norte ICMS in 3 steps

  1. Enter your amount. Type the price you are working with — either before tax or tax-inclusive, depending on what you have.
  2. Pick the rate and direction. The 20% standard internal rate is pre-filled and editable; choose “Add tax” or “Remove tax”.
  3. Read the split instantly. You get the net amount, the exact tax, and the gross total — ready to quote, invoice, or check a receipt against.

Why getting the Rio Grande do Norte split right matters

Tax is the part of the price most people get wrong, because the headline rate is rarely the whole story: in Brazil the internal rate differs by state, interstate sales use different rates, and tax substitution (ICMS-ST) changes who pays on some goods. This calculator starts from the general internal rate — and if your item qualifies for a different treatment, type that rate in and it calculates it instead.

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Rio Grande do Norte ICMS FAQ

The standard internal rate is 20%. The rate rose from 18% to 20% on 20 March 2025.
Multiply the net price by the internal rate and add it on: a R$100.00 item at 20% gives R$20.00 of tax and a R$120.00 total. In the calculator, choose “Add tax”, enter the amount and rate, and the split appears instantly.
Divide the gross total by (1 + rate ÷ 100). At 20%, a R$100.00 total divides to a R$83.33 net — the tax inside it is R$16.67. Choose “Remove tax” in the calculator and it does this for you.
No. This is the state's standard internal rate for most goods and services. Reduced tax bases, exemptions and tax substitution (ICMS-ST) can change the effective tax on specific items, and sales to buyers in other states generally use the interstate rates of 7% or 12% instead — this calculator does not cover those cases. If a different rate applies to your item, type it into the rate field.
Sales to buyers in other states generally use the interstate rates of 7% or 12%, not the internal rate, and tax substitution (ICMS-ST) may also apply. This calculator starts from the internal rate; type 7% or 12% into the rate field if you are pricing an interstate sale.
Yes — unlimited calculations, no signup, no watermark. Everything runs in your browser; nothing you type is uploaded anywhere.

Related calculators

See all Brazilian states, try the tax calculator for any rate, or put the result on a free invoice. More state calculators: Rio de Janeiro · Rio Grande do Sul.