In 2019, the New York City Bar Association’s Committee on Professional Ethics issued Formal Opinion 2019-5, addressing whether a fee agreement requiring payment in cryptocurrency constitutes a “business transaction” subject to Rule 1.8(a) of the New York Rules of Professional Conduct[reference:0][reference:1]. This guide explains the opinion’s core holdings, documentation requirements, common triggers, and practical risk controls for attorneys and law firms.
Formal Opinion 2019-5 (July 11, 2019) was issued by the Association of the Bar of the City of New York’s Committee on Professional Ethics[reference:2]. The Committee was asked: Is a fee agreement requiring the client to pay for legal services in cryptocurrency a business transaction governed by Rule 1.8(a)?[reference:3]
The opinion draws a critical distinction based on whether cryptocurrency payment is required or merely optional. If payment in cryptocurrency is required under the terms of the agreement, the fee agreement is a “business transaction” within the meaning of Rule 1.8(a)[reference:4][reference:5]. If the client has the option—but not the obligation—to pay in cryptocurrency, Rule 1.8(a) does not apply[reference:6][reference:7].
Rule 1.8(a) provides that a lawyer shall not enter into a business transaction with a client if they have differing interests and if the client expects the lawyer to exercise professional judgment for the client’s protection, unless:
The opinion notes that Rule 1.8(a) “does not apply to ordinary fee arrangements between client and lawyer reached at the inception of the client-lawyer relationship”[reference:11]. However, because cryptocurrency is treated as property rather than cash, a required cryptocurrency fee arrangement moves beyond an “ordinary” fee agreement[reference:12].
Regardless of whether Rule 1.8(a) applies, all legal fees must be reasonable under Rule 1.5(a)[reference:13]. A fee that is excessive or unconscionable is prohibited even if the client agrees to pay in cryptocurrency. The reasonableness analysis considers factors such as the time and labor required, the novelty and difficulty of the questions involved, the skill requisite to perform the service properly, and the fee customarily charged in the locality for similar services.
Not every cryptocurrency fee arrangement triggers Rule 1.8(a). The following factors are key triggers identified in the opinion.
If the fee agreement requires the client to pay in cryptocurrency—rather than offering it as an option—Rule 1.8(a) is implicated[reference:14]. The opinion treats this as a business transaction because the lawyer and client must negotiate potentially complex questions about the type of cryptocurrency, exchange rates, conversion mechanisms, and volatility risk[reference:15].
Even if payment is required, Rule 1.8(a) applies only if the client expects the lawyer to exercise professional judgment on the client’s behalf in negotiating the fee arrangement[reference:16]. If the client is a sophisticated party knowledgeable about cryptocurrency, or is represented by separate counsel, it is unlikely that the client expects the lawyer’s professional judgment on the fee terms[reference:17].
The lawyer and client have “differing interests” in the transaction because the lawyer’s financial interest in the fee may diverge from the client’s interest in a fair and reasonable arrangement[reference:18]. This is particularly acute when the fee is denominated in cryptocurrency units rather than a fixed dollar amount, exposing the client to market volatility.
The opinion explicitly identifies two scenarios that trigger Rule 1.8(a): (1) a flat fee of X units of cryptocurrency, or (2) an hourly fee of Y units of cryptocurrency[reference:19][reference:20]. In both cases, the lawyer and client must negotiate the type of cryptocurrency, the exchange rate, and who bears volatility risk[reference:21].
When Rule 1.8(a) applies, the lawyer must satisfy three documentation obligations. Below is a comparison of the requirements and practical considerations.
| Requirement | What It Means | Practical Consideration |
|---|---|---|
| Fair and reasonable terms | The transaction must be objectively fair to the client[reference:23] | Document how the fee was calculated and why it is reasonable; consider using a fixed dollar-equivalent rather than a floating cryptocurrency amount |
| Full written disclosure | Terms must be fully disclosed and transmitted in writing in a manner reasonably understood by the client[reference:24] | Use plain language; explain volatility, conversion mechanics, fees, and who bears exchange-rate risk |
| Advice to seek independent counsel | Client must be advised in writing of the desirability of seeking independent legal counsel[reference:25] | Include a clear written advisement; give the client a reasonable opportunity to consult separate counsel before signing |
| Informed written consent | Client must sign a writing consenting to the essential terms and the lawyer’s role[reference:26] | Obtain a separate signed consent form; ensure the client acknowledges understanding of the risks |
These requirements are cumulative. The lawyer must satisfy all three for the transaction to be ethically permissible under Rule 1.8(a).
The opinion analyzes three distinct fee arrangements[reference:27][reference:28]. The table below summarizes whether Rule 1.8(a) applies in each scenario.
| Scenario | Description | Rule 1.8(a) Applies? | Reason |
|---|---|---|---|
| 1 | Flat fee of X units of cryptocurrency, or hourly fee of Y units of cryptocurrency[reference:29] | ✅ Yes | Required cryptocurrency payment; complex negotiations; client may rely on lawyer’s judgment[reference:30] |
| 2 | Hourly rate of $X dollars to be paid in cryptocurrency[reference:31] | ✅ Yes (if required) | Fee is denominated in dollars but payment must be in cryptocurrency; still requires negotiation of conversion and volatility[reference:32] |
| 3 | Hourly rate of $X dollars, which the client may, but need not, pay in cryptocurrency[reference:33] | ❌ No | Cryptocurrency is optional; functions merely as a payment convenience[reference:34] |
A law firm agrees to represent a technology startup in a commercial dispute. The engagement letter states: “The client shall pay a flat fee of 2.5 Bitcoin for all legal services through trial.” Under Formal Opinion 2019-5, this is Scenario 1 — a required flat fee in cryptocurrency units. Rule 1.8(a) applies. The firm must: (a) disclose the terms in writing, (b) advise the client in writing to seek independent counsel, (c) give the client a reasonable opportunity to do so, and (d) obtain the client’s signed informed consent[reference:35]. The firm should also consider how to address volatility — for example, by agreeing on a dollar-reference point or a conversion mechanism.
Attorneys who accept cryptocurrency as payment for legal services should implement robust risk controls. The following checklist provides a practical framework.
The opinion expressly acknowledges that cryptocurrency markets are volatile, with “significant surges and drops in any given month”[reference:44]. Attorneys should address in the fee agreement:
These terms should be disclosed and consented to in writing as part of the Rule 1.8(a) process.
Even well-intentioned attorneys can make errors when navigating cryptocurrency fee arrangements. Below are some of the most frequent pitfalls.
Many attorneys mistakenly believe that a typical engagement letter covers cryptocurrency payments. Under Formal Opinion 2019-5, a required cryptocurrency fee arrangement requires specific Rule 1.8(a) disclosures and consent[reference:47].
Some attorneys overlook the critical distinction between required and optional cryptocurrency payment. If the agreement “requires” payment in cryptocurrency, Rule 1.8(a) is triggered; if it is merely an option, it is not[reference:48].
Cryptocurrency values can fluctuate dramatically. Failing to specify valuation dates, exchange rates, and who bears volatility risk can lead to disputes and potential claims of unfairness[reference:49].
Some attorneys focus exclusively on Rule 1.8(a) and neglect Rule 1.5(a). A fee paid in cryptocurrency must still be reasonable; an excessive fee is unethical regardless of the form of payment[reference:50].
If the lawyer believes the client does not expect the lawyer’s professional judgment because the client is sophisticated, this should be documented. The inquiry is fact-intensive, and the burden is on the lawyer to demonstrate compliance[reference:51].
Rule 1.8(a) requires written advice to seek independent counsel[reference:52]. A verbal suggestion is insufficient; the advisement must be in writing and the client must be given a reasonable opportunity to act on it.
Formal Opinion 2019-5 is limited to the question of whether a fee agreement requiring cryptocurrency payment is a “business transaction” under Rule 1.8(a). The opinion does not address:
Since 2019, the regulatory environment for cryptocurrency has continued to develop. New York’s BitLicense regime imposes significant compliance burdens on digital asset businesses[reference:54]. Federal agencies, including the SEC and CFTC, have increased enforcement activity. Attorneys should verify current rules and platform availability before accepting cryptocurrency payments. The opinion itself acknowledges that “state and federal agencies are largely still determining how to best regulate cryptocurrency”[reference:55].
Formal Opinion 2019-5 is specific to New York. Other jurisdictions have issued their own guidance. For example, the D.C. Bar has opined that it is not unethical for a lawyer to accept cryptocurrency so long as the fee is reasonable[reference:56]. Attorneys practicing in multiple jurisdictions should consult the ethics rules of each relevant jurisdiction.
This guide is for educational and informational purposes only and does not constitute legal advice, financial advice, or tax advice. The information provided is based on Formal Opinion 2019-5 and related materials as of the date of publication. Ethics rules, regulations, and interpretations may change. Attorneys should consult with qualified ethics counsel and review the most current rules and opinions before entering into any cryptocurrency fee arrangement. Nothing in this guide creates an attorney-client relationship.
Formal Opinion 2019-5 is a July 2019 opinion by the New York City Bar Association’s Committee on Professional Ethics addressing whether a fee agreement requiring payment in cryptocurrency constitutes a “business transaction” subject to Rule 1.8(a) of the New York Rules of Professional Conduct[reference:57][reference:58].
Rule 1.8(a) applies if (1) payment in cryptocurrency is required under the fee agreement, and (2) the client expects the lawyer to exercise professional judgment on the client’s behalf in negotiating the agreement[reference:59]. If cryptocurrency payment is merely optional, Rule 1.8(a) does not apply[reference:60].
The lawyer must: (1) ensure the transaction is fair and reasonable and disclose all terms in writing; (2) advise the client in writing to seek independent counsel and give a reasonable opportunity to do so; and (3) obtain the client’s signed informed consent to the essential terms[reference:61].
Yes, if payment in cryptocurrency is required. Scenario 2 in the opinion — an hourly rate of $X dollars to be paid in cryptocurrency — is subject to Rule 1.8(a) because the lawyer and client must still negotiate conversion, exchange rates, and volatility risk[reference:62]. If the client has the option to pay in dollars or cryptocurrency, Rule 1.8(a) does not apply[reference:63].
If the client is a sophisticated party knowledgeable about cryptocurrency, or is represented by separate counsel, it is unlikely that the client expects the lawyer’s professional judgment on the fee arrangement[reference:64]. However, this is a fact-intensive inquiry, and lawyers should document their assessment[reference:65].
New York ethics opinions provide little guidance on this specific question[reference:66]. Lawyers should exercise extreme caution and consult with ethics counsel before holding cryptocurrency in a trust account, as it raises issues under Rule 1.15 (safekeeping property) and may implicate banking and securities regulations.
Yes. All legal fees, regardless of the form of payment, must be reasonable under Rule 1.5(a)[reference:67]. A fee paid in cryptocurrency that is excessive or unconscionable is unethical even if the client agrees to the arrangement.
Yes, accepting cryptocurrency is not impermissible in New York, provided the arrangement complies with the New York Rules of Professional Conduct[reference:68]. Attorneys must ensure compliance with Rule 1.8(a) (if applicable), Rule 1.5(a), and other relevant rules[reference:69].