Paying for an Opinion, and What It Buys
Every expert in a proceeding is paid by somebody, and the bare fact of payment tells a decision-maker nothing they did not already assume. What matters is whether the arrangement gives the witness a stake in the outcome rather than in the quality of the work.
The rule in short
An expert is paid for time and analysis, and that arrangement is normal and disclosed. Fee structures tied to the outcome are treated differently and are prohibited in some fields. The questions that carry weight concern contingency, the proportion of a witness's work from one source, and the extent of instructing-party involvement in drafting.
Cross-examination that establishes an expert is being paid establishes nothing, because everybody in the room knows it already. The questions that go somewhere are about what the payment is conditional on and how much of the witness's practice depends on one source of instructions.
What a normal arrangement looks like
Payment for time. Hourly or daily rates for analysis, report preparation, conferences and attendance, which is how professional work is charged everywhere.
Fixed fees for defined work. A set amount for a report of defined scope, which is common and unobjectionable provided the scope does not constrain the analysis.
Rates that reflect the field. Specialist rates are high and their level is not evidence of anything, since the same person charges comparably for non-litigation work.
Payment regardless of conclusion. The defining feature of a proper arrangement is that the expert is paid the same whether their conclusion helps the instructing party or not.
Disclosure is expected. Most forums require the arrangement to be stated, and volunteering it removes an obvious line of enquiry before it is opened.
Unpaid fees at the hearing. An expert who has not been paid for work already done has an interest of a different kind, and it is occasionally worth asking about.
Arrangements that cause problems
Contingency on the outcome. A fee dependent on the result gives the witness a direct financial stake in their own conclusion and is prohibited in several professional codes.
Fees contingent on the conclusion. Worse still, and any suggestion that payment depended on reaching a particular view is close to fatal to the opinion.
Bonuses and success payments. Structures that reward a favorable outcome raise the same problem in a less obvious form and are treated the same way.
Referral relationships. Where an expert receives work through a relationship that depends on producing helpful opinions, the incentive operates without any explicit agreement.
Fee levels tied to volume of work. An expert whose income depends on a continuing stream of instructions from one source has an interest that no single engagement letter discloses on its face.
Undisclosed arrangements. Whatever the structure, discovering it during examination is far worse than stating it in the report, and the concealment becomes the point rather than the fee.
| Arrangement | Treatment | Why |
|---|---|---|
| Hourly or daily rate | Normal | Paid for time, not result |
| Fixed fee, defined scope | Normal | Independent of conclusion |
| Contingent on outcome | Serious problem | Stake in the result |
| Contingent on conclusion | Close to fatal | Opinion is purchased |
| Heavy repeat instruction | Goes to weight | Ongoing interest |
Repeat instruction and the proportion question
A legitimate enquiry. How much of a witness's income comes from litigation work, and how much of that comes from one firm or one side, is properly askable.
It bears on weight, not admissibility. A frequently instructed expert is not disqualified, and a decision-maker who finds the reasoning sound will accept it regardless.
Balance is the useful answer. An expert who has been instructed by both sides over time, and who has produced unhelpful opinions when the analysis required it, answers the question convincingly.
Practice alongside litigation. Somebody who still works in their field, rather than exclusively giving evidence about it, is harder to characterize as a professional witness.
Previous judicial comment. Where a decision-maker has commented on an expert's evidence before, the comment is discoverable and will be found.
Do not lead with it. An independence attack that fails leaves the witness sympathetic, and the reasoned answers that follow are heard more generously, per the basis of an opinion.
Instructing parties write to experts as though the correspondence were private, and in many forums it is not. Drafts, comments and instruction letters are obtainable, and the safest working assumption is that every message will be read aloud by somebody hostile.
Drafts and instructing-party influence
Drafts may be disclosable. Rules differ, and in several systems earlier versions of a report and the comments on them can be obtained by the other side.
Legitimate comment exists. Pointing out a factual error, an ambiguity or a failure to address part of the question is proper and improves the report.
Illegitimate comment also exists. Suggesting different conclusions, removing unhelpful passages or softening qualifications is the kind of involvement that destroys a report when it surfaces.
The instruction letter is part of it. A letter indicating the desired answer becomes an exhibit, which is why instructions are drafted as documents an opponent will read.
Keep the record clean. Assuming that every communication with an expert will be produced is the only safe working practice, and it costs nothing at all to adopt from the first letter onward.
Comment in writing, not by telephone. An unrecorded conversation about a draft looks worse when it surfaces than a written note identifying a factual error, because nobody can show what was actually said.
Where two experts differ, the file matters. Drafting history is one of the first things an opponent looks for in a case with competing reports, per two experts who disagree.
The duty and what it means in practice
The obligation runs to the forum. Most systems require an expert to state that their overriding duty is to the decision-maker rather than to the party paying them.
It is not a formality. An expert who reaches an unhelpful conclusion is expected to say so, and the ones who do are the ones whose opinions carry weight when they help.
Withdrawing is sometimes correct. Where an expert cannot support the position they were instructed to support, the answer is to say so rather than to narrow the question until they can.
Changing an opinion is permitted. New material may properly change a conclusion, and an expert who updates their view with an explanation is more credible than one who cannot.
Declarations record all this. The statements a report must carry are set out in what an expert report must contain.
The fact that an expert is paid is not a point, and cross-examination that spends time establishing it wastes the time and signals that nothing better is available.
The arrangements that genuinely matter are the ones giving a witness a stake in the outcome. Contingent fees, success payments and referral relationships all create an incentive that no declaration of independence cures.
Repeat instruction is a legitimate enquiry and a limited one. It bears on weight rather than admissibility, and an expert with a balanced practice and a history of unhelpful conclusions answers it convincingly.
Drafting influence is the area where parties most often damage their own case. Comments that suggest conclusions, rather than identifying errors, are exactly what an opponent hopes to find in a disclosable file.
The duty to the forum is the framework holding all of this together. An expert who says so and means it, including when the answer does not help, is the one whose opinion is worth commissioning.
Points to carry away
- Payment for time and analysis is normal and not a criticism.
- Outcome-contingent fees are a serious problem and sometimes prohibited.
- Repeat instruction from one firm is a legitimate line of enquiry.
- Drafts and comments on them are frequently discoverable.
- The duty runs to the forum, not to the payer.
Questions readers ask
Is it a valid criticism that an expert is paid by one side?
Not on its own. Every expert in a proceeding is instructed and paid by somebody, the arrangement is normally disclosed, and a decision-maker takes it as given. Cross-examination establishing the fact of payment achieves nothing and suggests there is no better material available. What does carry weight is a fee arrangement that depends on the outcome or on the conclusion reached, because that gives the witness a personal stake in their own opinion rather than in the quality of their work.
Are draft expert reports discoverable?
It depends on the forum and the rules that apply, and in a number of systems they are. Where drafts and the communications about them can be obtained, an opponent may see what the report said before the instructing party commented and what changed afterwards. Comments that identified factual errors or ambiguities are unobjectionable. Comments that proposed different conclusions or removed unhelpful passages are extremely damaging when produced, which is why the safe practice is to write every communication expecting it to be read.
What should an expert do if their analysis does not support the instructing party?
Say so. The overriding duty in most systems runs to the decision-maker, and an expert who reports an unhelpful conclusion is doing what they were engaged to do. The alternative, which is to narrow the question or adjust the assumptions until a helpful answer emerges, produces a report that is vulnerable at exactly the point an opponent will examine. Experts who have delivered unwelcome conclusions in the past are also the ones whose favorable opinions carry the most weight later.
Sources
- Federal Rules of Civil Procedure — Rule 26, Duty to Discloselaw.cornell.edu
- Federal Rules of Evidence — Rule 702, Testimony by Expert Witnesseslaw.cornell.edu
- Federal Rules of Evidence — Rule 611, Mode and Order of Examining Witnesseslaw.cornell.edu
- Federal Rules of Evidence — Rule 706, Court-Appointed Expert Witnesseslaw.cornell.edu
- Legal Information Institute — Expert Witnesslaw.cornell.edu
- Federal Rules of Evidence — Rule 705, Disclosing the Facts Underlying an Expert's Opinionlaw.cornell.edu
True Justice Record is a publication, not a law firm. This article states general rules and cites its sources; it is not advice about any particular case, and the law differs by state and changes over time.
More in Opinion That Counts as Evidence
Who Qualifies as an Expert
A witness may be qualified by knowledge, skill, experience, training or education, and any one of them suffices. The enquiry is whether this person knows something useful about this question, not whether they hold a particular qualification. A separate and prior question is whether the claimed field is one in which expertise genuinely exists.
What an Expert Report Must Contain
A usable expert report identifies the question it answers, lists the material examined, separates assumptions from findings, describes the method, shows the reasoning, states the qualifications relied on and carries the declarations the forum requires. Omissions are treated as weaknesses rather than as tidiness problems.
When an Opinion Is Excluded
Expert evidence is subject to a gatekeeping decision before it is heard. The questions are whether the subject genuinely admits of expertise, whether the witness possesses it, whether the method is reliable and whether the opinion assists rather than usurping the decision-maker. Challenges have to be brought early to be decided properly.