Payslip Explainer (Mexico)

Paste your payslip and understand every item: ISR, IMSS, subsidy, Infonavit, SBC and more

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Full payroll glossary

Salary: Your pay for the days worked in the period. Most other items are based on it.
Overtime: The first 9 hours a week are paid double and the rest triple (arts. 67-68 LFT). Part is ISR-exempt.
Sunday premium: An extra 25% of your daily salary for working on Sunday (art. 71 LFT).
Vacation premium: At least 25% of your vacation-day pay (art. 80 LFT). Exempt up to 15 UMA a year.
Christmas bonus: At least 15 days of salary, before December 20. Exempt up to 30 UMA.
Profit sharing: Your share of 10% of company profits. Exempt up to 15 UMA.
Grocery vouchers: A social-welfare benefit. ISR-exempt up to a limit and IMSS-exempt up to 40% of the UMA.
Savings fund: Shows up twice: as income (the employer's part) and as a deduction (yours). You get it all back, usually once a year.
Bonuses: Extra pay for punctuality, attendance or results. Punctuality and attendance ones are IMSS-exempt up to 10% of salary.
Employment subsidy: A government credit that lowers ISR on low incomes (up to ~$11,492 a month in 2026). It's not employer money: it's subtracted from your tax.
Income tax (ISR): Income tax withheld by your employer and paid to SAT, using the art. 96 LISR tariff on taxable income.
IMSS contributions: Your share of social security: healthcare, sick pay, disability and your retirement account. Usually 2.5–3% of salary; the employer pays much more.
Infonavit mortgage: Deduction to repay your housing loan. Only appears if you have one. The employer's 5% contribution is not deducted from you.
Fonacot loan: Repayment of a Fonacot consumer loan you took out, deducted via payroll.
Child support: A court-ordered deduction for child support. The employer must apply it.
Loan or advance: Money advanced by the employer, recovered in installments. By law it can't exceed 30% of the amount above minimum wage (art. 110 LFT).
Absences or lateness: Deduction for days not worked. It also reduces the days counted for IMSS.
SBC (contribution base salary): Your daily salary integrated with bonus, vacation premium and other benefits. IMSS contributions and your future pension are based on it.
SDI (integrated daily salary): Daily salary plus prorated benefits. Used for severance and IMSS.
Social security number: Your IMSS number (11 digits). You need it for your contribution statement and your Afore.
Tax ID (RFC): Your SAT taxpayer ID. Make sure it's correct so withheld ISR shows up in your annual return.
CURP: Your national population ID. It must match RENAPO's record.
Tax receipt ID (UUID / CFDI): Proof the payslip is registered with SAT. You can verify it on SAT's CFDI verification site.
Total earnings: Everything you earned in the period before deductions.
Total deductions: Sum of everything deducted: taxes, contributions and loans.
Net pay: What actually reaches your account: earnings minus deductions.
Taxable and exempt: Each earning is split into a part that pays ISR (taxable) and a part that doesn't (exempt).
Pay period and days paid: Weekly, biweekly, semi-monthly or monthly. Days paid drive salary and contributions.

The analysis runs in your browser using a glossary of Mexican payroll (CFDI) concepts; your payslip is never sent to a server. If something doesn't add up, ask HR or contact PROFEDET.

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Free Online Payslip Explainer (Mexico)

Payslip Explainer (Mexico) is a free online tool that allows you to paste your payslip and understand every item: isr, imss, subsidy, infonavit, sbc and more. It works directly in your browser, no installation or account creation needed.

Why use Payslip Explainer (Mexico)

Completely free with no registration
Works directly in your browser
Does not store or share your data
Instant and accurate results
Compatible with phone, tablet and computer

How to use it in 3 steps

1
Copy the text
From your payslip PDF.
2
Paste it
Into the box.
3
Read each item
With amount and explanation.

Questions about Payslip Explainer (Mexico)

Why does my net pay change between paychecks?

Days paid, overtime, absences and loan deductions (Infonavit, Fonacot) vary from period to period.