Form 8300 for Law Firm Cash | Kathryn Meyer Law PC

Yes. Under section 6050I of the Internal Revenue Code, a law firm that receives more than $10,000 in cash in one transaction or in related transactions must file IRS/FinCEN Form 8300, generally within 15 days. The IRS's own reference guide uses a lawyer as its example: cash of more than $10,000 received as an advance for legal services must be reported even though no work has been done yet.

The filing is only part of it: the firm must also give a written statement to the people named on the form by January 31 of the next year, and the penalties for getting it wrong can be severe. Cash handling is part of Kathryn Meyer's work on tax planning for law firms.

How Form 8300 reporting works, step by step

Decide whether the payment is "cash." U.S. and foreign coins and currency always count. Cashier's checks, bank drafts, traveler's checks and money orders count only in narrower situations, explained below. Personal checks and wire transfers do not count.
Add up related payments. Payments from the same payer within 24 hours are combined, and so are payments the firm knows or has reason to know are a series of connected transactions. Installments are added from the first payment for one year.
Collect identifying information about the person who handed over the cash and anyone on whose behalf it was paid, including taxpayer identification numbers.
File within 15 days after the cash that pushes the total over $10,000 is received; if the 15th day falls on a weekend or holiday, file the next business day.
Send the written statement to each person named on the form by January 31 of the following year.
Keep a copy of the form, the supporting documents and the statement for at least five years, and start a new count of that payer's cash.

What counts as cash for a law firm

The reference guide treats monetary instruments differently depending on the transaction. They count as cash when their face value is $10,000 or less and the business receives them in a "designated reporting transaction," which is the retail sale of a consumer durable, a collectible, or travel or entertainment, or in any transaction where the business knows the customer is trying to avoid a Form 8300. Legal fees are not on the designated list, so for a law firm the second condition is the one that matters.

Form of payment	Counts toward the $10,000?	Source
U.S. or foreign currency and coins	Yes	IRC 6050I(d); reference guide
Cashier's check, bank draft, traveler's check or money order of $10,000 or less	Only if the firm knows the payer is trying to avoid Form 8300 reporting (legal fees are not a designated reporting transaction)	Reference guide
Cashier's check or money order over $10,000	No	Reference guide
Personal check drawn on the writer's account	No	IRC 6050I(d); reference guide
Wire or other transfer from a financial institution	No	Reference guide
Digital assets	Added to the statutory definition, but not required to be counted until regulations are issued	IRC 6050I(d)(3); Announcement 2024-4

Where the cash goes inside the firm does not change the answer. The reference guide lists escrow arrangement contributions and custodial trust contributions among the transactions that require Form 8300, so cash taken in for a client's trust account counts the same way as cash applied to fees. How trust account interest is taxed is a separate question, covered in who pays tax on interest earned in a lawyer's trust account.

Related transactions and installment retainers

Splitting a payment does not avoid the form. If the first payment is more than $10,000, the form is due within 15 days. If not, the firm adds the first payment and any later payments within one year of it, and files within 15 days of the payment that takes the total over $10,000. After filing, the count starts over, and another form is due if more than $10,000 more arrives within 12 months. The reference guide's example: $11,000 on January 10 requires a form by January 25; later payments of $4,000, $5,000 and $6,000, ending May 12, require a second form by May 27.

Section 6050I(f) makes it unlawful to structure a transaction, or help structure one, to evade the reporting rules, and applies the same civil and criminal sanctions as for a failure to file. The Internal Revenue Manual lists unexplained dealings in large sums of currency among its indicators of fraud, a subject covered in the warning signs that a civil IRS audit could turn criminal.

What changes the answer

Who is paying. If someone pays on another person's behalf, such as a relative paying a defense retainer, the reference guide says the firm must also obtain the other person's TIN.
A refused TIN. The guide says to note "customer refused" on a paper form, or leave the TIN blank and explain in the comments section of an electronic one, and to document the attempts; reasonable cause may then protect the firm from penalties under 26 CFR 301.6724-1.
Client identity. The form asks for the payer's identity, and the guide warns that missing or incorrect information can bring civil or criminal penalties. The general rule that client identity is rarely privileged is discussed in Don't Neuberger Your IOLTA Account.
Suspicion. A firm may check box 1b for a suspicious transaction and may file voluntarily for $10,000 or less. No statement goes to the payer on a voluntary filing, and the guide says the parties must never be told about a form marked suspicious.
Electronic filing. Since January 1, 2024, a business that must file at least 10 other information returns, such as Forms W-2 and 1099, must e-file Forms 8300 through FinCEN's BSA E-Filing System. Forms 8300 do not count toward the 10. The firm's own 1099 obligations are covered in when payments to your law firm are reported on Form 1099.
Digital assets. Section 6050I(d)(3) now includes digital assets in "cash," but Announcement 2024-4 says that until regulations are issued, businesses need not include them when testing the $10,000 threshold. Income tax still applies to digital assets received, as the announcement notes; see what the IRS already knows about cryptocurrency.

For example: a defense retainer paid in pieces

For example, imagine a firm agrees to a $25,000 retainer for a criminal defense matter. On Monday, March 2, 2026, the client's brother brings $8,000 in currency; on Wednesday, March 4, he brings $7,000 more; and on Friday, March 6, he delivers a $10,000 cashier's check. The two currency payments are toward the same retainer, so they are connected, and their $15,000 total passes $10,000 on March 4. The firm must file Form 8300 by March 19, 2026, listing the brother as the person who paid and the client as the person on whose behalf he paid, with both TINs. The cashier's check is not cash here, because legal fees are not a designated reporting transaction and nothing suggests an attempt to avoid reporting; if the brother had asked how to keep the payments "under the limit," that would change. The firm sends written statements to the brother and the client by January 31, 2027, and keeps everything for five years. This is a hypothetical, not a real case.

Common mistakes with cash retainers

Counting each payment separately. Related and installment payments are added together.
Waiting until the work is done. The reference guide's attorney example is clear that an advance is reportable when received.
Filing only part of the information. Missing names and TINs can bring penalties, so document every request.
Sending the client a copy of the form. The guide says a copy is not advisable because of the sensitive information on it; send a statement with the required items instead.
Mailing paper when e-filing is required. The guide treats a form not filed in the required manner as late.
Suggesting smaller payments. Helping a payer stay under $10,000 is structuring under section 6050I(f).

What to do this week

Adopt a written cash intake procedure: who may accept cash, how it is logged, and who files Form 8300.
Set up a running log of cash by payer and by client, so related and installment payments are added automatically.
Add a TIN request to your cash receipt form, with a space to record a refusal.
Count the firm's other information returns for the year to see whether e-filing is mandatory, and register with the BSA E-Filing System if needed.
Prepare a statement template with the firm's name and address, a contact person and phone number, the total reportable cash for the year, and a line saying the information is being furnished to the IRS.
If a past form was missed, file it now marked "LATE," in the same manner a timely form would have been filed.

Frequently asked questions

Does a cash payment of exactly $10,000 require a form?

No. The requirement applies to more than $10,000. A payment of $10,000 plus any related cash payment would cross the line.

Is Form 8300 an IRS form or a FinCEN form?

Both. It is titled IRS/FinCEN Form 8300, and electronic filing is done through FinCEN's BSA E-Filing System. A business that is not required to e-file may still mail a paper form to the IRS.

Do we have to tell the client we filed?

Yes, for a required filing. The written statement must be sent by January 31 of the following year to each person named on the form, unless the form was filed voluntarily, for example to report a suspicious transaction.

What are the penalties?

For returns required to be filed in 2026, Rev. Proc. 2024-40 sets the general civil penalty at $340 per return and, for intentional disregard, the greater of $34,150 or the cash received, up to $136,500, per failure. The reference guide adds that a willful failure to file is a felony under section 7203, with fines up to $25,000 ($100,000 for a corporation) and up to five years in prison.

Can a missed Form 8300 be fixed?

File it as soon as possible, marked "LATE." Penalties may be reduced if the firm can show reasonable cause; see whether IRS penalties can be removed.

Can the IRS ask the firm about its cash clients later?

Yes. In an examination the IRS can request records and, in some cases, issue a summons; see whether the IRS can contact your bank, clients or employer during an audit.

Handling cash with confidence

A clear procedure makes Form 8300 routine; improvising makes it risky. Kathryn Meyer spent more than two decades in the IRS Office of Chief Counsel and can review how your firm takes in cash and whether past filings were complete. A review of compliance and state standing is part of the Annual Tax Health Checkup. Contact the firm or call (571) 560-8674.

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