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CONSTITUTIONAL LAW · Lawful · Business purpose · Substance

Tax avoidance.
The taxpayer’s right to organize their affairs.

Tax avoidance is lawful tax saving — the taxpayer’s right to choose among the alternatives the law permits. It differs from tax evasion (unlawful) and from aggressive planning (high risk of being struck down). Limits: substance, business purpose, timeliness.

Published maio 4, 2026 · Updated maio 29, 2026 · 9 min read

Tax avoidance is lawful tax saving, obtained by choosing among the alternatives that the law itself offers. It is the taxpayer’s constitutional right to organize their affairs in the least burdensome way, as repeatedly recognized by the STF and the CARF. It differs from tax evasion (unlawful — Law 8.137/90) and from aggressive planning (a grey area, with a high risk of being struck down). Limits: substance, business purpose, timeliness.

01

Tax avoidance × Tax evasion × Aggressive planning

Tax avoidance (lawful)

Tax saving obtained by choosing among the alternatives the law offers. Before the taxable event. No simulation, no fraud. It is a right.

Example: opting for Presumed Profit instead of Actual Profit when the operating margin is high.

Tax evasion (unlawful)

Saving obtained through concealment, fraud, simulation or the hiding of facts. After the taxable event. It is a crime under Law 8.137/90 — it triggers criminal liability in addition to tax liability.

Example: issuing an under-invoiced tax document to reduce the taxable base.

Aggressive planning (grey area)

Operations that are formally lawful but have very little business purpose, created exclusively to reduce tax. The CARF and the STJ have been striking down such structures.

Example: setting up an offshore vehicle company with no real operation, solely to concentrate profit.

02

Limits in case law

The CARF has consolidated decisions on disregarded operations: internal goodwill, planning with vehicle companies lacking substance, the artificial segregation of activities to fit a more favorable regime. The line separating lawful tax avoidance from disregarded planning runs through three tests:

  1. Substance over form — does the operation have economic reality or is it merely formal?
  2. Business purpose — is there a relevant business motivation beyond the tax saving?
  3. Timeliness — is the structure established with reasonable advance notice or assembled on the eve of the taxable event?

General anti-avoidance rule (CTN art. 116, sole paragraph)

The sole paragraph of art. 116 of the CTN authorizes the Federal Revenue Service to disregard dissimulating acts. Although not regulated by specific legislation, it is applied by analogy in CARF precedents.

03

Common tax avoidance strategies

1. Asset-holding companies

Concentrating real estate and equity interests in a legal entity — saving on IRPF on rent, succession-related ITCMD, and asset protection. See Tax Planning.

2. Corporate reorganization

Spin-off, merger, incorporation to isolate activities, separate risks, optimize the tax regime. Always with a documented business purpose.

3. Choice of tax regime

An annual decision among Simples, Presumed Profit and Actual Profit. It can cut the tax burden by 5-10 percentage points.

4. JCP (Interest on Equity)

Distributing profit as interest — deductible for the company, taxed at 15% withholding income tax for the partner. A typical net gain of 19 percentage points.

5. Recovery of late-claimed credits

Taking advantage of tax credits up to 5 years retroactively — STF Theme 69, STJ Theme 779, STF Theme 163. See Tax Planning.

6. Estate succession

Progressive gifting of quotas, reservation of usufruct, VGBL. It reduces ITCMD and avoids judicial probate.

04

Practical test: does the structure “survive an audit”?

A practical test to distinguish lawful tax avoidance from aggressive planning: does the structure have real business reasons? Family succession, separation of assets, raising investment, governance, risk isolation?

Structures with a real business reason survive an audit even if the tax saving is significant. Structures with a purely tax-driven reason are struck down.

Guiding principle

“Tax saving is a consequence, not the sole motivation.”

When the structuring is proposed solely to reduce tax, with no other defensible reason — we recommend not doing it. The risk of being struck down outweighs the benefit.

Tax avoidance review — free diagnostic

An assessment of existing or proposed structures: are they within the concept of lawful tax avoidance or in a grey area? Validation against CARF/STJ precedents.

Book a diagnostic
05

Frequently asked questions

What is the difference between tax avoidance and tax evasion?
Tax avoidance is lawful tax saving, obtained by choosing among the alternatives the law offers — the taxpayer’s constitutional right. Tax evasion is unlawful saving, obtained through concealment, fraud or simulation — a crime under Law 8.137/90. The line separating the two is substance over form and the real business purpose of the operation.
Can I do aggressive planning if everything is formally lawful?
We do not recommend it. Operations that are formally lawful but lack substance and business purpose are struck down by the Federal Revenue Service and the CARF — generating retroactive tax + an ex-officio fine of 75-150% + interest. The cost of being struck down far exceeds the tax saving of the operation. It is only worth doing tax avoidance with technical grounding and a real business reason.
How do I know whether my structure has a business purpose?
Ask: if I removed the tax saving from the equation, would the structure still make sense? If yes (family succession, risk separation, raising investment, governance) — it has a business purpose. If not (the sole motivation is tax saving) — high risk. Contemporaneous documentation of the business motivation is critical for defense in an audit.
Is the general anti-avoidance rule of the CTN applicable?
The sole paragraph of art. 116 of the CTN authorizes the disregarding of dissimulating acts. Although not regulated by specific legislation (a rule pending since 2001), it is applied by analogy by the CARF in cases of simulation. Robust structures (with substance and business purpose) are not affected. Fragile structures (lacking substance) are.
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