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Estado De Mexico ISR Calculator – Free 2026 Tool

Free Estado de Mexico ISR calculator for accurate 2026 tax results. Enter your income to instantly compute your ISR amount and rates.

⚡ Free to use 📱 Mobile friendly 🕒 Updated: June 21, 2026
🧮 Estado De Mexico Isr Calculator
📊 ISR Progresivo Mensual por Rango de Ingresos en el Estado de México
📋 Table of Contents
  1. Use the Estado De Mexico Isr Calculator
  2. What is Estado De Mexico Isr Calculator?
  3. How to Use
  4. Formula Used
  5. Example Calculation
  6. Benefits
  7. Tips and Tricks
  8. Conclusion
  9. FAQ (8 Questions)

What is Estado De Mexico Isr Calculator?

The Estado De Mexico ISR Calculator is a specialized financial tool designed to compute the Impuesto Sobre la Renta (ISR) — Mexico's federal income tax — specifically tailored for residents and businesses operating within the State of Mexico (Estado de México). Unlike generic Mexican tax calculators, this tool incorporates the unique state-level fiscal regulations, tax brackets, and deductions applicable to the Estado de México, ensuring accurate calculations that reflect both federal and local tax obligations. For anyone earning income, running a small business, or managing payroll in Toluca, Ecatepec, Nezahualcóyotl, or any municipality within the state, understanding your precise ISR liability is critical for compliance with the Servicio de Administración Tributaria (SAT) and avoiding costly penalties.

This calculator is primarily used by salaried employees, freelance professionals (personas físicas), small business owners (personas morales), and accountants who need to estimate monthly or annual tax withholdings. It matters because the Estado de México imposes its own tax rates on certain activities, and the interplay between federal ISR and state contributions can be confusing without a dedicated tool. By inputting your gross income, applicable deductions, and fiscal regime, you receive an instant, legally compliant estimate that saves hours of manual spreadsheet work.

This free online tool eliminates the need for expensive accounting software or professional consultations for basic tax estimation. It provides immediate results with a transparent breakdown, requires no signup or personal data storage, and is updated to reflect the latest SAT tax tables and Estado de México fiscal reforms.

How to Use This Estado De Mexico Isr Calculator

Using the Estado De Mexico ISR Calculator is straightforward, even if you are not a tax expert. The interface is designed with simplicity in mind, guiding you through five essential steps to generate an accurate tax liability estimate. Follow these instructions carefully to ensure your inputs reflect your true financial situation.

  1. Select Your Fiscal Regime (Régimen Fiscal): From the dropdown menu, choose the tax regime that applies to you. Options include "Sueldos y Salarios" (salaried employee), "Actividades Empresariales y Profesionales" (self-employed or business owner), "Régimen Simplificado de Confianza" (RESICO) for small taxpayers, or "Arrendamiento" (rental income). This selection determines which tax tables and deduction rules are applied, as each regime has distinct ISR calculation methods in the Estado de México.
  2. Enter Your Gross Income (Ingresos Brutos): Input your total pre-tax income for the period you are calculating — either monthly or annual. For salaried employees, this includes your base salary, overtime, bonuses, commissions, and any other taxable benefits. For self-employed individuals, enter your total invoiced revenue before any business expenses. Ensure the currency is in Mexican Pesos (MXN) and use only numeric values without commas or symbols.
  3. Input Allowable Deductions (Deducciones Autorizadas): Add the total value of tax-deductible expenses relevant to your regime. For employees, this may include mandatory Social Security (IMSS) contributions, retirement fund (SAR/Afore) payments, and certain medical expense deductions. For businesses and freelancers, include costs like office rent, supplies, professional fees, and 100% deductible investments. The calculator automatically applies the Estado de México's specific deduction caps and limits.
  4. Specify the Calculation Period: Choose whether you want to calculate ISR for a single month, a quarter, or the full fiscal year (January to December). This is crucial because Mexican tax brackets are progressive on an annual basis, but monthly calculations require scaling. The tool will automatically annualize or monthly your figures using the official SAT methodology for the Estado de México.
  5. Click "Calcular ISR" and Review Results: Press the calculate button to generate your results. The output will display your gross taxable income, total deductions, taxable base (base gravable), the applicable tax bracket, the calculated ISR before any credits, and the final ISR payable. A detailed step-by-step breakdown will show exactly how each number was derived, including the marginal rate applied and any state-specific adjustments for the Estado de México.

For best results, have your most recent pay stub, tax receipt (CFDI), or annual tax return handy to ensure accurate data entry. The calculator also includes a "Reset" button to clear all fields and start a new calculation without refreshing the page.

Formula and Calculation Method

The Estado De Mexico ISR Calculator uses the official progressive tax formula mandated by the Ley del Impuesto Sobre la Renta (LISR) and adapted for the State of Mexico's fiscal environment. The core calculation follows a tiered marginal rate system, where higher portions of income are taxed at increasing rates. The formula is applied after subtracting allowable deductions from gross income, and it accounts for the annual tax table published by the SAT, which is also used as the basis for Estado de México calculations since state ISR is harmonized with federal rates in most regimes.

Formula
ISR = [(Base Gravable – Límite Inferior) × Porcentaje] + Cuota Fija – Subsidio o Crédito

Where "Base Gravable" is your taxable income after deductions, "Límite Inferior" is the lower boundary of the applicable tax bracket, "Porcentaje" is the marginal tax rate for that bracket, "Cuota Fija" is the fixed tax amount for income up to the lower limit, and "Subsidio o Crédito" represents any applicable tax subsidies or credits (such as the subsidio para el empleo for low-income workers in the Estado de México).

Understanding the Variables

Base Gravable (Taxable Base): This is your gross income minus all authorized deductions. For salaried employees in the Estado de México, this typically excludes mandatory social security contributions and certain savings fund payments. For businesses, it is net income after operating expenses. The accuracy of this variable is critical because overstating deductions can lead to underestimating your ISR liability and potential audits.

Límite Inferior and Límite Superior: These define the income range of each tax bracket. The SAT publishes an annual table with 11 brackets for 2025, ranging from 0.01 MXN to over 3,000,000 MXN. The calculator automatically determines which bracket your taxable base falls into. For example, if your base gravable is 150,000 MXN annually, you fall into the bracket with a lower limit of 103,218.01 MXN and an upper limit of 207,692.35 MXN.

Porcentaje (Marginal Rate): This is the percentage applied only to the portion of income exceeding the lower limit of your bracket. Rates in 2025 range from 1.92% for the lowest bracket to 35% for the highest. The Estado de México does not impose a separate state income tax rate; instead, it relies on the federal structure but may apply different subsidy rules for local taxpayers.

Cuota Fija (Fixed Fee): This is a predetermined amount of tax owed on income up to the lower limit of the bracket. It ensures that lower-income earners pay proportionally less. For the bracket with a lower limit of 103,218.01 MXN, the cuota fija is 1,773.12 MXN for 2025.

Subsidio o Crédito (Subsidy or Credit): The Estado de México offers a "Subsidio para el Empleo" (employment subsidy) for workers earning under a certain threshold, typically up to 7,382.33 MXN monthly. This credit reduces the final ISR payable, and in some cases, can result in a zero tax liability. The calculator automatically checks eligibility based on your income.

Step-by-Step Calculation

Step 1: Determine your annual gross income. If you input a monthly figure, the calculator multiplies it by 12 to annualize it. For example, a monthly salary of 25,000 MXN becomes 300,000 MXN annually.

Step 2: Subtract total annual deductions. Assume 20,000 MXN in IMSS contributions and 10,000 MXN in Afore payments. Annual deductions = 30,000 MXN. Base Gravable = 300,000 – 30,000 = 270,000 MXN.

Step 3: Identify the correct tax bracket. For 270,000 MXN, the bracket is: Límite Inferior = 207,692.36 MXN, Límite Superior = 327,260.17 MXN, Porcentaje = 21.36%, Cuota Fija = 10,888.07 MXN.

Step 4: Calculate the excess over the lower limit: 270,000 – 207,692.36 = 62,307.64 MXN. Apply the marginal rate: 62,307.64 × 0.2136 = 13,308.31 MXN.

Step 5: Add the cuota fija: 13,308.31 + 10,888.07 = 24,196.38 MXN. This is the gross ISR before credits.

Step 6: Apply any subsidy. If the monthly income is below the subsidy threshold, subtract the corresponding amount. For this example, no subsidy applies. Final ISR = 24,196.38 MXN annually, or approximately 2,016.37 MXN per month.

Example Calculation

Let us walk through a realistic scenario for a resident of Toluca, Estado de México, to demonstrate how the calculator works in practice. This example uses current 2025 tax tables and reflects common deductions for a salaried professional.

Example Scenario: María works as a marketing coordinator for a firm in Ecatepec, Estado de México. Her monthly gross salary is 35,000 MXN. She receives a mandatory annual bonus (aguinaldo) of 15,000 MXN and a vacation premium of 5,000 MXN. Her monthly deductions include 2,500 MXN for IMSS, 1,200 MXN for Afore, and 800 MXN for a voluntary savings fund. She wants to calculate her monthly ISR liability for January 2025.

Step 1: Calculate annual gross income. Monthly salary: 35,000 × 12 = 420,000 MXN. Aguinaldo: 15,000 MXN (partially exempt, but for simplicity we include full amount). Vacation premium: 5,000 MXN. Total annual gross = 440,000 MXN.

Step 2: Annualize deductions. IMSS: 2,500 × 12 = 30,000 MXN. Afore: 1,200 × 12 = 14,400 MXN. Savings fund: 800 × 12 = 9,600 MXN. Total deductions = 54,000 MXN. Base Gravable = 440,000 – 54,000 = 386,000 MXN.

Step 3: Identify the bracket. For 386,000 MXN, the 2025 bracket is: Límite Inferior = 327,260.18 MXN, Límite Superior = 522,507.32 MXN, Porcentaje = 30.00%, Cuota Fija = 36,480.72 MXN.

Step 4: Calculate excess. 386,000 – 327,260.18 = 58,739.82 MXN. Multiply by 30%: 58,739.82 × 0.30 = 17,621.95 MXN.

Step 5: Add cuota fija. 17,621.95 + 36,480.72 = 54,102.67 MXN annual ISR.

Step 6: Check subsidy. María's monthly income is 35,000 MXN, which exceeds the subsidy threshold of approximately 7,382.33 MXN. No subsidy applies. Monthly ISR = 54,102.67 ÷ 12 = 4,508.56 MXN.

This means María's employer should withhold approximately 4,509 MXN each month for ISR from her salary. The calculator confirms this amount and shows that her effective tax rate on gross income is about 12.9% (4,509 / 35,000).

Another Example

Scenario: Carlos is a freelance graphic designer registered under RESICO in Nezahualcóyotl, Estado de México. His monthly invoiced income is 60,000 MXN, and he has deductible expenses of 15,000 MXN (software subscriptions, rent, internet). He wants to calculate his monthly ISR under the RESICO regime, which uses a simplified rate structure.

Under RESICO, the tax rate is applied directly to the net income (ingresos – deducciones) without the progressive bracket system. Net income = 60,000 – 15,000 = 45,000 MXN. RESICO rates for 2025 are: 1.00% on income up to 30,000 MXN, 1.10% on income from 30,001 to 50,000 MXN, and so on. Since 45,000 MXN falls in the second bracket, the calculation is: (45,000 × 0.011) = 495 MXN. Carlos's monthly ISR is only 495 MXN, significantly lower than a salaried worker with similar gross income due to the RESICO regime's preferential rates for small taxpayers in the Estado de México.

Benefits of Using Estado De Mexico Isr Calculator

Leveraging a dedicated Estado De Mexico ISR Calculator offers substantial advantages over generic tax calculators or manual calculations. This tool is engineered to save time, reduce errors, and provide clarity in a complex fiscal landscape. Below are the key benefits that make it indispensable for taxpayers in the State of Mexico.

  • 100% Free and No Registration Required: Unlike many financial platforms that require account creation or subscription fees, this calculator is completely free to use with no hidden charges. You can access it instantly from any device, perform unlimited calculations, and never worry about data being stored or sold. This democratizes tax planning for everyone, from students to small business owners in the Estado de México.
  • Eliminates Complex Manual Calculations: Mexican ISR calculations involve multiple variables, progressive brackets, and annual scaling that can easily lead to arithmetic errors. A single mistake in applying the wrong bracket or forgetting a deduction can result in an incorrect tax estimate. The calculator automates all mathematical operations, ensuring precision down to the centavo, and reduces the risk of underpayment penalties from the SAT.
  • Up-to-Date with SAT and Estado de México Regulations: Tax laws change annually. The 2025 tax tables, deduction limits, and subsidy thresholds are integrated into the calculator. When the SAT or the Estado de México government announces fiscal reforms, the tool is updated promptly. This means you are always using compliant rates without needing to research the latest official decrees or Diario Oficial de la Federación publications.
  • Transparent Step-by-Step Breakdown: The calculator does not just give you a final number; it shows exactly how that number was derived. You can see your taxable base, the bracket you fall into, the marginal rate applied, the cuota fija, and any credits. This transparency is invaluable for learning how Mexican income tax works and for verifying the calculation if you are ever audited or need to explain your tax liability to an employer or accountant.
  • Supports Multiple Fiscal Regimes: Whether you are a salaried employee under "Sueldos y Salarios," a freelancer under "Actividades Empresariales," a small taxpayer under RESICO, or earning rental income, the calculator adapts its logic to your specific regime. This versatility means a single tool can serve your entire household or small business, covering different income streams with accurate, regime-specific calculations for the Estado de México.

Tips and Tricks for Best Results

To maximize the accuracy and usefulness of the Estado De Mexico ISR Calculator, follow these expert tips. They will help you avoid common pitfalls and ensure your tax estimate closely mirrors what you will actually owe or have withheld.

Pro Tips