Technical study on eligibility criteria and the financial impact of choosing the taxation model to maximize refunds
The choice between the complete declaration (for legal deductions) and the simplified declaration (standard discount) represents the most relevant strategic decision for the taxpayer during the annual adjustment of Personal Income Tax (IRPF). This option defines not only tax compliance, but tax efficiency on income earned in the base year 2025. Understanding the mechanics of each model is essential to determine which path results in the lowest tax burden or the highest possible refund.
The concept: calculation mechanics and structural differences
The fundamental distinction between the two models lies in the calculation basis used to apply the tax rates. The ultimate goal of both is to find the correct taxable amount, but the deduction methods differ substantially.
Simplified model (standard discount)
In this modality, the Federal Revenue applies a standard discount of 20% on the sum of all declared taxable income. This model replaces all possible legal deductions (health, education, dependents). However, there is a ceiling on this discount. Historically readjusted, this financial limit defines the cutoff point where the simplified model stops being mathematically advantageous for higher incomes without significant deductible expenses. It is the ideal option for those who do not have many proven expenses.
Complete model (legal deductions)
The complete declaration allows the deduction of specific expenses, as long as they are duly proven and provided for by law. Unlike the simplified model, there is no fixed percentage; deductions are calculated item by item. The tax calculation base is reduced by the sum of expenses with health, education, private pension (PGBL), alimony and dependents. If the sum of these expenses exceeds 20% of taxable income (or the simplified discount ceiling), this model becomes statistically superior.
Influencing factors in determining the refund
To answer which is the best 2026 income tax declaration model to obtain a greater refund, it is necessary to analyze the variables that make up legal deductions. The viability of the complete model directly depends on the volume and nature of expenses carried out throughout 2025.
- Medical expenses: They do not have a deduction ceiling. High expenses with health plans, doctors, dentists, psychologists and hospitals tend to make a complete declaration the best option.
- Dependents: Each dependent guarantees a fixed deduction in the calculation base. Large families often benefit from the complete model.
- Education: It has an annual deduction limit per person (holder and dependents). Spending above this ceiling does not reduce the calculation base, which requires careful planning.
- Private Pension (PGBL): Contributions to the Free Benefit Generating Plan (PGBL) allow you to deduct up to 12% of your annual taxable gross income, being a powerful tax planning tool for those who opt for the complete model.
- Official Pension and Cash Book: Contributions to the INSS and expenses recorded in the cash book (for self-employed people) also impact the reduction in the calculation base.
Current scenario: analysis for 2026
The fiscal scenario for IRPF 2026 (base year 2025) reflects the updates to the progressive table and recently implemented exemption bands. The expansion of the exemption range changes the balance point between the two models. For taxpayers with income close to the exemption limit, the simplified discount often automatically resets the tax due.
On the other hand, for the middle and upper class, medical inflation and the cost of education continue to put pressure on deductible expenses. Simulation is the only accurate tool, but the general rule remains analytical: you must add up all deductible expenses. If the total exceeds R$16,754.34 (reference value of the current simplified discount ceiling, subject to annual adjustment), the complete declaration is mathematically mandatory to maximize the refund. If expenses are less than 20% of taxable income or less than the nominal ceiling, the simplified model will offer the best financial return.
Frequently Asked Questions (FAQ)
- Is it possible to change the taxation model after submitting the declaration?
During the delivery period, the taxpayer can send a rectifying declaration and change the model (from complete to simplified and vice versa). After the end of the legal delivery period, rectification is only permitted to correct data, and changing the taxation model is prohibited.
- Does the Federal Revenue program indicate the best option?
Yes. When filling in all income and expenses in the official IRPF 2026 software, the system presents a real-time comparison in the “Option for Taxation” table, indicating the amount of tax to be paid or refunded in each modality.
- Can anyone with a VGBL pension deduct in the full declaration?
No. Only the PGBL modality allows the deduction of up to 12% of gross income in the complete declaration. VGBL does not offer tax benefits in the accumulation phase and is neutral when choosing the model.
- What is the best 2026 income tax declaration model to get a bigger refund?
The best model is the one that results in the lowest effective calculation base. If your deductible expenses (health, education, dependents) add up to more than 20% of your gross annual income (respecting the standard deduction ceiling), the complete declaration will generate a greater refund. Otherwise, the simplified one will be more advantageous.
The selection of the Income Tax taxation model should not be based on assumptions, but on a rigorous arithmetic analysis of income and expenses for the calendar year. The correct use of legal deductions in the complete declaration or the strategic application of the standard discount in the simplified form are the mechanisms that define the taxpayer’s tax efficiency. It is recommended to organize all receipts in advance and use the Federal Revenue simulator to validate the final decision.
Disclaimer: The information contained in this article is for informational and educational purposes only. They do not constitute tax, legal or accounting advice. Tax rules may undergo legislative changes. Consult an accountant or tax specialist to analyze specific cases.
