MundoKit

Mexico salary ISR calculator for 2026

Enter taxable salary for one pay period and select its tariff. Results show ISR before employment subsidy, plus projected withholding for the number of identical periods you enter—not complete net salary.

Inputs
Article 96: confirm eligibility for your geographic zone across the whole month, even when using a weekly or 15-day tariff. Income alone does not establish eligibility.
MXN
Enter taxable remuneration after exempt amounts, not automatically total gross pay.
Example: 12 monthly, 24 quincenal or 52 weekly. Set this to your actual payroll count.

Results

ISR withholding before employment subsidy
MX$2,383.65
Raw tariff tax before exemptions
MX$2,383.65
Taxable pay less ISR only
MX$17,616.35
Projected withholding for entered periods
MX$28,603.83
Selected tariff calculation
Lower limitExcessFixed feeMarginal rate
MX$17,533.65MX$2,466.35MX$1,856.8421.36%
  • This is not net salary. Employment subsidy, IMSS, other payroll deductions and annual ISR reconciliation are excluded. Annual withholding is a repetition of this pay period, not the annual tax tariff.

Results update as you type. The share link stores your inputs after the # in the address, which is not sent to our server, but anyone you send it to can read them.

This is a general estimate for information only, not tax, legal or financial advice. Real rules have more conditions than a calculator can show, so check the official source below or a qualified professional for your situation.

Last checked 2026-11-14. Rules change, sometimes at short notice. We list the date we last checked each official source; confirm with the official government source before you travel, buy or file. This is general information, not legal or immigration advice.

How it works

SAT's Annex 8, published on 28 December 2025 for 2026, supplies separate withholding tariffs for payments covering 7 days, 15 days and a month. The calculator selects the bracket from the chosen table using taxable salary, after any exempt remuneration.

ISR before subsidy = fixed fee + (taxable salary − bracket lower limit) × marginal rate

The 15-day tariff is quincenal; it is not a 14-day biweekly tariff. We use the published bracket lower limits and fixed fees directly, without scaling another tariff. Zero taxable salary gives zero ISR. Enter amounts in cents. Intermediate arithmetic is not rounded; displayed money is rounded to two decimal places.

Article 96 exempts withholding when the employee receives only the applicable geographic general minimum wage during the whole month. Explicitly confirm that condition; the calculator never infers it from income. This is separate from employment subsidy. The 2026 monthly equivalents are MXN 9,582.47 in the general zone and MXN 13,409.80 in the northern border zone (resolution clause four). If eligible, withholding and its projection are zero; raw tariff tax remains visible separately.

The annual projection multiplies the calculated withholding by your entered pay-period count. This count is an assumption you control, not a statutory annual calculation. It does not use the annual ISR tariff. Employment subsidy, IMSS, other payroll deductions and the annual reconciliation are outside scope.

Worked examples

MXN 20,000 monthly taxable salary

The lower limit is MXN 17,533.65, fixed fee MXN 1,856.84 and marginal rate 21.36%. ISR is 1,856.84 + (20,000 − 17,533.65) × 21.36% = MXN 2,383.65. Twelve identical periods project to MXN 28,603.83 before subsidy.

MXN 5,000 per 15-day period

The fixed fee is MXN 207.75 and the lower limit MXN 3,537.16, at 10.88%. ISR before subsidy is MXN 366.91. This leaves MXN 4,633.09 of taxable pay before other adjustments. Enter 24 periods to project MXN 8,805.77.

Frequently asked questions

Is quincenal the same as every two weeks?
No. This calculator’s quincenal option uses SAT’s 15-day table. The weekly option uses 7 days; no 14-day tariff is implemented.
Should I enter gross salary?
Enter the taxable portion for the selected period. The tool does not determine which allowances or benefits are exempt.
Why is this not a net salary calculator?
Employment subsidy can change withholding, and IMSS and other deductions affect cash pay. Neither is calculated here. The result is explicitly ISR before subsidy.
Can I divide monthly ISR to estimate weekly ISR?
Use the weekly tariff directly. Its published lower limits and fixed fees differ from a simple division of the monthly table.
Is the annual projection my final annual tax?
No. It repeats the selected period’s withholding for your chosen count. Annual ISR uses separate rules, deductions and reconciliation.

Sources

Last reviewed 2026-11-14; next review due by 2027-01-15. The method is written out above so you can check our math.