Form 8918 is the Material Advisor Disclosure Statement. An advisor who gives material aid, assistance or advice on a reportable transaction, and earns more than the threshold fee for it, files Form 8918 with the IRS Office of Tax Shelter Analysis. The IRS replies with a reportable transaction number, which the advisor must pass to every client in the deal. The clients disclose separately on Form 8886.
This guide follows the Instructions for Form 8918 (Rev. November 2021), the current revision as of October 2026. It's for advisors, firms and in-house teams working out whether a deal puts them on the hook.
Advisor form versus taxpayer form
Form 8918 and Form 8886 are two halves of the same system. The taxpayer who takes part in a reportable transaction files 8886. The advisor who helped put it together files 8918, under section 6111. Form 8918 replaced the old Form 8264, Application for Registration of a Tax Shelter.
Are you a material advisor?
You're a material advisor when three things have all happened, in any order. You make a tax statement about the transaction. You receive, or expect to receive, gross income above the threshold for your help. And the taxpayer you advised enters into the transaction.
A tax statement is any oral or written statement about a tax aspect that makes the deal reportable, including tax result insurance. Fees count in any form, cash or in kind, for analysis, implementation, documentation, and return preparation where the preparation fee is unreasonable. Charges you make as a party to the deal, such as reasonable charges for capital, don't count.
The fee thresholds, as of October 2026
| Transaction | Threshold |
|---|---|
| Substantially all tax benefits go to individuals (generally 70% or more) | $50,000 |
| All other reportable transactions | $250,000 |
| Listed transaction, individual benefits | $10,000 |
| Listed transaction, all others | $25,000 |
You measure the threshold separately for each transaction, and fees from different reportable deals aren't added together. The individual test looks through any partnership, S corporation or trust, so benefits that reach people through a Form 1065 partnership or a Schedule K-1 still count as going to individuals.
What counts as reportable
- Listed transactions: the same as, or substantially similar to, a type the IRS has named as tax avoidance in published guidance.
- Confidential transactions: offered under conditions of confidentiality for a minimum fee of $250,000 for most corporations, or $50,000 for everyone else.
- Transactions with contractual protection: the client can get fees back if the tax result fails, or fees depend on the tax benefit.
- Loss transactions: section 165 losses of at least $2 million in one year for individuals, or $10 million for corporations other than S corporations.
- Transactions of interest, which the IRS also names in published guidance.
Substantially similar is read broadly in favor of disclosure. A transaction that later becomes a listed transaction makes you a material advisor on the date it's listed.
Who doesn't file
An employee, shareholder, partner or agent making a statement only in that role isn't a material advisor; the statement is treated as made by the employer or firm. That protection ends if an entity is set up to dodge the rules. Advice first given after the client's return claiming the benefit is filed is also outside the rules, unless an amended or supplemental return claiming more benefit is expected.
The deadline
File by the last day of the month after the end of the calendar quarter in which you became a material advisor. Become one in February and the form is due by April 30. The same clock runs for an amended statement, which you must file if information is no longer accurate, new details emerge, or the deal changes materially.
The IRS rejects forms that are handwritten, not on the current 2021 version, or that say See Attached without first filling the box as far as it'll go. You can send it by electronic fax to the toll-free number in the instructions, with a cover sheet listing the subject, sender and material advisor but no sensitive data.
The list you have to keep
Material advisors also keep a list of the people they advised on each reportable transaction, for 7 years after the later of the last tax statement or the last time the deal was entered into. If the IRS asks in writing, you have 20 business days to produce it.
Penalties, as of October 2026
| Failure | Penalty |
|---|---|
| Late, false or incomplete Form 8918, ordinary reportable transaction | $50,000 |
| Same, listed transaction | The greater of $200,000 or 50% of the gross income from the advice, rising to 75% if intentional |
| List not produced within 20 business days | $10,000 for each day after the 20th business day |
Writing details available upon request in a box isn't a description, and can make the whole statement incomplete. A ruling request doesn't pause the duty either: you still file while it's pending.
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Protective filing
If you can't tell whether a deal is reportable, the instructions let you file a protective Form 8918 and explain why on line 6a. The IRS treats it like any other disclosure, so it has to be complete.
The verdict
If your fee on a deal could cross $50,000, or $10,000 for anything resembling a listed transaction, track the quarter you crossed it and diarize the month-end deadline. Fill every box, keep the list from day one, and pass the reportable transaction number to clients so their 8886s match.
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Frequently asked questions
Who files Form 8918?
A material advisor: someone who gives material aid, assistance or advice on a reportable transaction and receives, or expects, gross income above the threshold for it.
When is Form 8918 due?
By the last day of the month after the end of the calendar quarter in which you became a material advisor.
What's the difference between Form 8918 and Form 8886?
Form 8918 is filed by the advisor under section 6111. Form 8886 is filed by each taxpayer who took part in the reportable transaction.
What's the Form 8918 threshold?
As of October 2026, $50,000 where substantially all benefits go to individuals and $250,000 otherwise, cut to $10,000 and $25,000 for listed transactions.
Can I fax Form 8918?
Yes. The instructions allow electronic fax to a toll-free number, for Form 8918 and its attachments only, with a cover sheet that carries no sensitive information.
What's the penalty for not filing Form 8918?
$50,000 for most reportable transactions, or for listed transactions the greater of $200,000 or 50% of the advice income, as of October 2026.
