What is a expert witness agreement?
An expert's value in litigation depends on independence. A fee that rises or falls with the opinion, or a retaining lawyer who pushes for a different conclusion, can undermine the evidence and the expert's reputation. A clear retention agreement protects both: the expert is paid for time, whatever the opinion, and the lawyer knows the rates, the rules and what happens if a trial date moves.
This template identifies the expert's field, the retaining firm or party, the client represented, the matter and the other parties for the conflict check. It sets the subject of the work and whether the expert consults, testifies or may later be designated. It covers the retainer and how it is applied, hourly rates for review, report writing and testimony, minimum testimony days, travel time, late cancellation of reserved dates, depositions paid by other parties, expenses and invoicing. It states the expert's independence and court duties, conflicts, confidentiality and protective orders, the possibility that expert materials are disclosable, and ending the engagement.
- Best for
- Engineers, accountants, doctors and other specialists retained in litigation or arbitration
- Signed by
- The expert and the retaining law firm or party
- Roles
- Consulting expert, testifying expert, or consulting then testifying
- Length
- 3 pages, initialled on every page, signatures on the last page
When to use a expert witness agreement
- A structural engineer retained in a construction defects case
- A forensic accountant valuing a business in a shareholder dispute
- A medical expert reviewing records in a personal injury claim
- A software expert analysing code in an intellectual property case
- A consulting expert helping a firm prepare for cross-examination
What you fill in
22 blanks, then the name and email of each person who signs: expert, retaining party.
1 The parties
- Agreement date*
- Expert (you or your firm)*
- Expert's field and qualifications*
- Your phone or email*
- Retaining law firm or party*
- Responsible lawyer (name and email)*
2 The matter
- Party the firm represents (if a law firm retains)
- Matter (case name, court or tribunal, case number)*
- Other parties and their lawyers (for the conflict check)*
- Subject of the expert's work*
- Role* a consulting expert, advising the retaining party without giving evidence unless later agreed · a testifying expert, who may give a report and evidence · a consulting expert at first, who may later be designated to testify
3 Fees
- Currency*
- Retainer*
- The retainer* is applied to the final invoice, and any unused balance is refunded · is applied to each invoice and must be topped up when it runs out · is non-refundable and secures the expert's availability
- Hourly rate: review, research, analysis and meetings*
- Hourly rate: report writing (optional, if different)
- Hourly rate: deposition, hearing and trial testimony*
- Minimum charge per testimony day (optional)
- Travel time rate (optional)
- Late cancellation of testimony (business days)*
- Invoices payable within (days)*
- Governing law*
4 Who signs
- Expert signature and date, job title, initials on every page · The expert being retained (or the expert's firm).
- Retaining party signature and date, job title, initials on every page · The law firm or party retaining the expert — usually signed by the responsible lawyer.
What the expert witness agreement covers
- Scope and role
- Independence of opinion
- Conflicts
- Fees
- Expenses and payment
- Confidentiality and materials
- Ending the Agreement and general
Using the expert witness agreement, step by step
1 Identify the parties and matter
Enter the expert and field, the retaining firm or party, the client if a law firm retains, the case details and the other parties and lawyers for the conflict check.
2 Define the work and role
Describe the questions the expert will address and choose consulting, testifying, or consulting with possible designation later.
3 Set the fees
Enter the retainer and how it works, rates for review, report writing and testimony, an optional testimony-day minimum and travel rate, and the late cancellation notice.
4 Payment and send
Set the payment period and governing law, then send it to the responsible lawyer to sign.
Tips before you send it
- Run the conflict check against every party and law firm before signing. The agreement records the list it was based on.
- Ask the lawyer which procedural rules apply to experts in the court or tribunal. They can affect reports, disclosure and the expert's duties.
- Treat everything you write as potentially disclosable if you may testify. The agreement flags this.
- Agree how deposition fees will be collected when the other side takes the deposition, especially in places where they pay.
Sign it online in minutes
- Fill in the blanks. Names, dates and amounts go straight into the agreement — the preview shows exactly where.
- Name who signs. Tick “This is me” for your own part. FileIt builds the PDF with every signature, date and initials box on the right line, and you can check or move anything before sending.
- Send it. Each signer gets a secure link and signs from any device — no account needed. The signed PDF, with an audit trail and a Certificate of Completion, is filed in your vault and emailed to everyone.
Expert witness agreement: frequently asked questions
Can the expert's fee depend on winning?
No. The agreement says the fee is for time and payable whatever the opinion or outcome. A fee that depends on the outcome can damage credibility and is restricted or prohibited by court and professional rules in many places.
Who pays if the client doesn't?
Where a law firm retains the expert, the firm is responsible for the fees whether or not the client reimburses it.
What if the trial date is cancelled at the last minute?
Reserved testimony time cancelled with less than the notice you set is charged at the testimony rate, unless the expert can use the time for other paid work.
Does the expert owe a duty to the court?
Many courts and tribunals impose duties on experts that override their duty to the retaining party. The agreement says the expert will comply with them.
Can it be signed electronically?
Yes. E-signatures are generally valid for professional engagement agreements like this in the US, UK, EU and Canada. FileIt keeps an audit trail with the signed PDF.