How is the aguinaldo calculated in Mexico?

Under LFT Article 87 the minimum aguinaldo is 15 days of salary. The amount is daily salary × bonus days. For a full year worked you get the full 15 days; for a partial year it is pro-rated by the days worked: 15 × (days worked ÷ 365) × daily salary.

When must the aguinaldo be paid?

Employers must pay the aguinaldo by 20 December each year. Even employees who left before December are owed the part accrued for the days they worked that year, payable on termination.

Is 15 days the maximum?

No, 15 days is the legal minimum. Many employers, especially in the public sector and larger companies, pay 20, 30 or even 40 days as a benefit. Enter your contractual number of days if it is higher than 15.

Do new employees get an aguinaldo?

Yes. Employees who have not completed a full year are entitled to a proportional aguinaldo based on the days actually worked in the calendar year, regardless of how short the period is.

Does this calculator store my data?

No. All figures are computed locally in your browser and nothing is uploaded, so your details stay private.

Mexico 13th Month Salary Calculator

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This Mexico aguinaldo calculator works out the mandatory 13th-month bonus every employer must pay under the Ley Federal del Trabajo (LFT), including the pro-rated amount for employees who did not work the whole year.

How it works

LFT Article 87 sets the aguinaldo at a minimum of 15 days’ salary, payable by 20 December. The formula is:

Aguinaldo = daily salary × bonus days × (days worked ⁄ 365)

For a full year, the fraction is 1, so you get the full bonus-day value. For a partial year — a new hire, or someone who left mid-year — the amount is reduced by the proportion of the year actually worked. Many employers grant more than 15 days as a benefit, so the tool lets you set the bonus-day count.

Example

An employee on $600/day who worked the full year at the legal minimum of 15 days receives 600 × 15 = $9,000. An employee on the same salary who worked only 200 days receives 600 × 15 × (200 ÷ 365) ≈ $4,932.

Notes

The aguinaldo is calculated on the base daily wage, not the integrated salary used for severance.
It is subject to income tax (ISR), but the portion equal to 30 days of the minimum wage is exempt.
The 15-day figure is a floor; check your contract or collective agreement for a higher entitlement.