Success Fees: The Advantages and Pitfalls of Billing Tied to the Outcome

This page is a translation of the original Portuguese text, provided for convenience. It deals with Brazilian law. If there is any discrepancy, the Portuguese version prevails. Read the original in Portuguese

Fees calculated as a share of the outcome, where the lawyer is paid only if the case succeeds, are increasingly common in high-risk claims. The model appeals to clients without upfront capital, but a percentage of the result can get expensive when the recovery is large. Knowing when this arrangement pays off, which ranges are acceptable and which clauses to avoid is what separates a balanced agreement from a surprise at the end of the case.

What success-based fees are

Success-based fees are lawyer compensation calculated as a percentage of the economic benefit the client obtains. Instead of charging a fixed amount when you hire them, the lawyer ties their payment to the result. As a rule, no benefit obtained means no contractual fees owed.

Lawyers in Brazil know this structure by the Latin expression quota litis, meaning the share of the dispute that goes to the lawyer. The Brazilian Bar Statute (Law 8.906 of 1994) and the profession’s ethics rules allow the arrangement, as long as the contract respects limits of proportionality and transparency.

The appeal is clear. A client who cannot afford to pay fees upfront gains access to the courts by shifting part of the risk to the lawyer. In return, the lawyer accepts the possibility of working for months or years with no guarantee of payment, which justifies a higher percentage when the case is won.

When the model works in the client’s favor

A percentage arrangement makes the most sense in cases with an uncertain outcome and a significant amount at stake, where the client could not afford fixed fees. Damages claims, benefit reviews, labor disputes and consumer claims with a real chance of success usually fit this profile.

There is a quiet calculation behind the choice. If the chance of winning is low, the client prefers to pay nothing upfront and share the result only if it comes. If the chance of winning is high and the amount involved is large, negotiating a fixed fee may be cheaper, because a percentage of a large recovery can far exceed a sum agreed on at the start.

So the analysis of how strong the legal theory is comes before the discussion of how to pay. A solid, high-value case calls for careful negotiation of the percentage. A weak case makes sharing the result the only reasonable option.

Instead of charging a fixed amount when you hire them, the lawyer ties their payment to the result. As a rule, no benefit obtained means no contractual fees owed.

Reasonable percentages and ethical limits

There is no single table that sets the ideal percentage, but market practice and the profession’s rules mark out ranges. In civil and social security cases of average complexity, percentages between 20% and 30% of the economic benefit are common. Very high-risk claims, or those requiring robust expert evidence, can exceed that range.

The Bar Statute imposes an implicit ceiling of reasonableness. The agreed compensation cannot take such a large share of the result that it empties the client’s benefit and turns the victory into a practical loss. A clause that gives the lawyer most of the recovery tends to be considered abusive and can be reviewed by a court.

Another sensitive point is the calculation base. The percentage should apply to what the client actually receives, net of court costs and any deductions, and not to the gross amount of the judgment. The absence of a clear definition is the source of many of the conflicts between client and lawyer at the end of a case.

There is also the matter of court-awarded fees (known in Brazil as honorários de sucumbência), which the losing party pays to the winning party. As a rule, they belong to the lawyer by force of law, but the contract can set out how they are added to, or offset against, the success percentage. Without an express provision, the client may find out they are paying twice for the same victory.

How to avoid paying more than you expected

The first precaution is to insist on a written, detailed contract. A verbal agreement on a success percentage is a guaranteed source of disagreement, because memory and expectation rarely match once the money shows up. Everything that matters should be in the document: the percentage, the calculation base, the treatment of court-awarded fees and the grounds for termination.

The second is to understand the difference between economic benefit and the value of the case. A lawsuit may have an assigned value of one hundred thousand and end in a settlement of thirty thousand. A fair percentage applies to the thirty thousand actually obtained, not to the initial figure that served only procedural purposes.

The third precaution concerns what happens if the relationship ends before the case does. If the client switches lawyers midway, or the lawyer withdraws, the contract needs to say how the work already done will be paid. Without that clause, proportional charges are set after the fact, almost always in an atmosphere of dispute.

You should also look at add-ons. Interest, inflation adjustments and additional amounts awarded in the judgment are or are not part of the calculation base depending on what the contract says. When the text is silent, the lawyer will usually argue that everything counts, while the client will argue that nothing beyond the principal should.

Frequently Asked Questions

If I lose the case, do I have to pay the lawyer anything?

Under a pure success-based model, contractual fees are not owed when there is no economic benefit, because the compensation is tied to the result. Be careful, though, with procedural expenses such as court costs, expert fees and fact-gathering steps, which usually fall on the client regardless of the outcome. The contract should clearly separate fees from expenses, so that a loss does not bring unexpected reimbursement charges.

What percentage is considered abusive in this type of contract?

There is no fixed number, but the benchmark is reasonableness. Percentages that take most of the benefit away from the client tend to be seen as abusive and can be reviewed by a court. Ranges between 20% and 30% are common in cases of average complexity and can go higher in high-risk claims. What matters is that the client remains the main beneficiary of the result they sought.

Do success fees apply to the gross or the net amount?

It depends on what the contract says, which is exactly why this point needs to be in writing. The most balanced practice ties the percentage to the net benefit, meaning what the client actually receives after court costs and deductions. When the contract does not define the base, conflicting interpretations arise and end in arguments over the calculation. Defining the base when you sign avoids most of these conflicts.

As informações deste artigo são de caráter informativo e não substituem consulta jurídica individualizada. Cada caso possui particularidades que exigem análise específica.