Add or remove IVA at 16% or the 8% border rate, and estimate monthly ISR on a salary
Estimates only, not financial advice. What you type stays on your device. Checked against sources on 9 Oct 2026.IVA in Mexico is 16% of the price before tax, so 1,000 pesos plus IVA is 1,160. To take IVA out of a price that includes it, divide by 1.16. Registered sellers in the northern and southern border regions charge 8% under a fiscal stimulus decree.
2026 · Rates and rules read from SAT: Anexo 8 de la RMF para 2026, DOF 28 Dec 2025, section B table V on 9 Oct 2026; they may have changed since.
Choose Add IVA for a price before tax, Remove IVA for a price that includes it, or From the IVA amount.
Type the amount in pesos and pick 16%, 8% (border region) or 0%.
Read the price before IVA, the IVA and the total, and compare the three rates in the table.
For a salary, open the ISR tab and type the gross monthly pay to see the ISR withheld and the subsidy.
This calculator adds IVA to a price, takes it out of a price that already includes it, or works back from the IVA shown on an invoice to the price before tax and the total. Pick 16%, the general rate, 8% for the border region, or 0%, and the three figures appear as you type, with the same amount at all three rates in a table.
Adding and removing IVA. Adding is the price times 1.16. Removing is the price divided by 1.16, not the price minus 16%: 1,160 pesos is 1,000 plus 160 of IVA, while 16% of 1,160 would be 185.60. The calculator rounds the price before tax to the centavo and gives the IVA as the difference, so the two always add up to the total on the receipt.
The 8% border rate. A fiscal stimulus halves IVA to 8% for sellers registered for it whose premises are in the northern or southern border region, for sales made there. It is not a rate any buyer can choose, and it has been renewed year by year; the extension to 31 December 2026 was published in December 2025.
ISR on a salary. The second tab estimates the ISR an employer withholds from a monthly salary with the 2026 art. 96 tariff from Anexo 8 of the SAT's Resolución Miscelánea Fiscal, and the 2026 subsidio para el empleo: 15.02% of the monthly UMA for monthly income up to 11,492.66 pesos, applied against the ISR and never paid as cash. On 15,000 pesos the ISR is 1,402.82.
What it does not do. It does not file anything or know which products are at 0%, it does not apply IEPS or retained IVA, and the ISR tab assumes one employer, the same pay every month and no exempt income.
Everything runs in your browser; nothing you type is sent anywhere.
Multiply the price before tax by 0.16 for the IVA, or by 1.16 for the total. On 1,000 pesos the IVA is 160 and the total 1,160. Type the amount, keep Add IVA and 16% selected, and the three figures appear straight away.
Divide the price by 1.16 to get the amount before IVA, then subtract to get the IVA. 1,160 pesos divided by 1.16 is 1,000, so the IVA is 160. Subtracting 16% of the total gives the wrong answer, 185.60.
Sellers registered for the border-region fiscal stimulus, with premises in the northern or southern border region, on sales of goods and services made there. Imports and some services are excluded. The stimulus is set by decree and was extended to 31 December 2026.
The 2026 monthly tariff puts 15,000 pesos in the bracket from 14,644.65 pesos: a fixed 1,339.14 plus 17.92% of the 355.35 above it, which is 1,402.82 pesos. The employment subsidy does not apply above 11,492.66 pesos a month.
A monthly credit of 15.02% of the monthly UMA, about 535.65 pesos, for workers whose monthly income does not exceed 11,492.66 pesos. The employer takes it off the ISR, and if it is more than the ISR the difference is not paid out. January 2026 used 15.59% of the 2025 UMA.
Yes. Choose From the IVA amount and type the IVA shown on the invoice. At 16%, divide by 0.16 for the price before tax, so 160 pesos of IVA means a 1,000-peso price and a 1,160-peso total. At 0% there is no IVA to work back from.
Rates and rules change; check the source before you rely on a figure.
Still stuck? Ask about Mexico IVA Calculator (Calculadora de IVA) and anybody who knows can answer. No account needed.
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