How to Sell Intellectual Property: Valuation, Assignment, and Taxes

To sell intellectual property, you gather ownership records, confirm a clean chain of title, value the asset, sign a written assignment agreement that meets the requirements for that type of IP, and record the transfer with the federal agency that granted the rights. Federal law requires the assignment to be in writing for patents, trademarks, and copyrights, and a handshake deal will not hold up. The tax bill can range from a 0% long-term capital gains rate to ordinary income above 37%, depending on whether you created the asset yourself and how you structure the deal.

Pull Together the Ownership Records

Before you approach a buyer, assemble the documents that prove you own the asset and that it is in good standing. What you need depends on the type of IP.

Patents: the grant issued by the U.S. Patent and Trademark Office (USPTO), the application number, the names of all listed inventors, and proof that maintenance fees have been paid. Maintenance fees are due at 3.5, 7.5, and 11.5 years after issue, and a lapsed payment can reduce or eliminate value.
Trademarks: the USPTO registration certificate showing the mark, the registration number, the goods or services covered, and records of continued use in commerce. A trademark can be cancelled if the owner stops using it.
Copyrights: the registration certificate from the U.S. Copyright Office, including the registration number and the work’s title. Registration is what lets you record the transfer and gives the buyer constructive notice of ownership.
Trade secrets: internal documentation showing the secret exists and that you have taken reasonable steps to keep it confidential. Non-disclosure agreements, access logs, and security protocols all count. No government office registers trade secrets.

Gaps in this paperwork are the first thing a buyer uses to argue for a discount, so putting the file together before you go to market pays for itself in negotiation leverage.

Clear the Chain of Title and Any Liens

A serious buyer will trace ownership from the original creator through to you, and every link in that chain needs a written assignment. The most common break is an inventor or contractor who never formally assigned rights to the company that hired them. A gap means the buyer inherits a lawsuit risk, and sophisticated buyers walk away or demand a steep price cut.

For patents, check the USPTO’s Assignment Center to confirm that every transfer from the named inventors through each subsequent owner appears in the public record. If inventor assignment agreements were never recorded, get them signed and filed before you approach anyone. Employment agreements with invention assignment clauses can serve the same purpose, but standalone assignments tied to the specific patent are stronger proof.

Liens and security interests are the other hidden problem. A lender who financed your business may hold a security interest in your IP. For patents and trademarks, search both the USPTO assignment records and your state’s Uniform Commercial Code (UCC) filings. For copyrights, search the U.S. Copyright Office records, because federal copyright law generally preempts state UCC filing methods for perfecting security interests in registered copyrights. Any existing liens have to be released before you can deliver clear title.

Set a Defensible Price

IP valuation is more art than science, but three standard methods give you a starting point.

Cost approach: add up what it would take to recreate the asset from scratch, including research, development, legal, and registration expenses. This sets a floor and often understates value for IP that generates real revenue.
Market approach: look at what similar assets have sold for recently. This works in active patent technology markets where comparable deals are public, but sale data is scarce or confidential for many IP types.
Income approach: project the future cash flows the asset will produce from licensing fees, royalties, or product sales, then discount those to present value. Most serious buyers and appraisers rely on this method because it ties price to what the asset actually earns.

Several factors move the number regardless of method. A patent that has survived a validity challenge is worth more than one that has not been tested. A trademark with strong consumer recognition commands a premium over one known only in a niche. Remaining legal term matters: a patent nearing the end of its 20-year term is worth far less than one recently granted.¹ Existing license agreements that will travel with the asset can either add value through a guaranteed royalty stream or limit it if an exclusive license restricts the buyer.

For deals above a few hundred thousand dollars, an independent IP valuation professional gives both sides a credible number to negotiate around and produces documentation that helps if the IRS later questions the purchase price allocation.

Write the Assignment Agreement

Every IP assignment has to be in writing. For patents, 35 U.S.C. § 261 says patents “shall be assignable in law by an instrument in writing.”² For copyrights, 17 U.S.C. § 204 makes any transfer “not valid” unless it is in writing and signed by the owner.³ Trademarks follow the same rule under 15 U.S.C. § 1060.⁴ A verbal agreement will not hold up.

The assignment is effectively the bill of sale. It identifies the seller (assignor) and buyer (assignee), and it has to describe the IP with enough specificity to leave no ambiguity. For a patent, list the patent number, issue date, and title. For a trademark, the registration number and the goods or services it covers. For a copyright, the registration number and the title of the work.

Payment Terms

The agreement spells out what the buyer is paying and how. Common structures include a one-time lump sum, installments over a set period, or ongoing royalties tied to the buyer’s revenue from the IP. Some deals combine an upfront payment with a royalty tail. Payment structure has tax consequences for both sides, so run it past an accountant before you sign.

Representations and Indemnification

The seller typically promises that you own the IP, that it does not infringe anyone else’s rights, that no lawsuits are pending against it, that maintenance and renewal fees are current, and that no undisclosed licenses or liens exist. If any of these turn out to be false, the buyer has a contractual claim against you.

An indemnification clause decides who pays the legal bills if problems surface after closing. If someone sues the buyer for infringement that predates the sale, does the seller cover the cost? What about undisclosed licensing obligations? Risk allocation here often takes more negotiation time than the price itself.

The Trademark Goodwill Trap

Trademarks carry a legal requirement that can void an otherwise valid sale. Under 15 U.S.C. § 1060, a registered trademark can only be assigned “with the good will of the business in which the mark is used, or with that part of the good will of the business connected with the use of and symbolized by the mark.”⁴ In plain terms, you cannot sell the brand name stripped of any connection to the business behind it. The buyer needs to receive something real alongside the mark: customer lists, product formulas, supplier relationships, manufacturing know-how, or similar assets that let them keep providing the goods or services consumers associate with the brand.

A trademark sold without goodwill is called an assignment in gross, and courts treat it as invalid. The buyer ends up with nothing, and the trademark rights may be considered abandoned. If you are selling a mark separately from a going business, build the goodwill transfer into the agreement explicitly and spell out which business assets change hands alongside it.

Sale or License: The Difference Matters

Not every IP transaction is a sale, and the distinction has real consequences. A sale (assignment) transfers ownership entirely; the buyer steps into your shoes and you lose all rights. A license grants permission to use the IP under specific terms while you keep ownership. The IRS looks past what you call the deal in the contract and examines whether all substantial rights actually transferred. If you retain geographic limits, field-of-use restrictions, or a right to terminate, the IRS may treat the transaction as a license rather than a sale, which changes the tax treatment from capital gain to ordinary licensing income.

This matters especially for patents under § 1235. Capital gains treatment requires transferring all substantial rights.⁵ Sellers sometimes try to keep a narrow right, like the ability to use the patent in a different field, and still claim capital gains treatment. Courts scrutinize those carve-outs closely, and the retained rights do not need to be individually significant. If they add up to something substantial in the aggregate, the entire transaction gets recharacterized as a license.

Plan for the Tax Bill Before You Sign

Tax treatment turns on two questions: did you create the asset yourself, and what type of IP is it?

Self-Created IP Is Ordinary Income

Under 26 U.S.C. § 1221(a)(3), a patent, invention, copyright, literary or artistic composition, or secret formula held by the person who created it is not a capital asset.⁶ Gain from selling self-created IP is taxed as ordinary income, which for high earners can reach 37%. The same rule applies if you received the asset as a gift from the creator, because your tax basis carries over from them.

Songwriters get a narrow exception. Under § 1221(b)(3), a creator of a musical composition or copyright in one can elect capital gains treatment on the sale.⁶ No other category of self-created IP gets this election.

The Patent Rule for Individual Inventors

Section 1235 of the Internal Revenue Code carves out favorable treatment for patents. If you qualify as a “holder” and transfer all substantial rights to a patent, the sale gets long-term capital gain treatment regardless of how long you held it and regardless of whether payment comes as a lump sum or as royalties tied to the patent’s productivity.⁵

A holder is either the individual inventor or another individual who bought an interest from the inventor before the invention was reduced to practice, as long as that buyer is not the inventor’s employer or a close relative. The word “individual” is doing work here. Corporations and partnerships do not qualify. And the transfer has to include all substantial rights; if you keep geographic restrictions, field-of-use limits, or a right to terminate, the IRS may recharacterize the deal as a license taxed at ordinary rates.

Purchased IP and Capital Gains Rates

If you bought the IP from someone else rather than creating it, and you held it for more than a year, gain on resale generally qualifies as a long-term capital gain. For 2026, federal long-term capital gains rates are 0%, 15%, or 20% depending on taxable income and filing status. Single filers pay 0% up to $49,450 in taxable income, 15% up to $545,500, and 20% above that. For married couples filing jointly, the 15% bracket runs from $98,901 to $613,700.

High-income sellers also face the 3.8% net investment income tax on capital gains when modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers.⁷ Combined with the 20% top capital gains rate, the effective federal rate on a large sale can reach 23.8% before state taxes.

Form 8594 for Business Asset Sales

When the IP sale is part of a larger transaction involving a group of business assets where goodwill could attach, both buyer and seller must file IRS Form 8594 with their tax returns.⁸ The form requires you to allocate the total purchase price across asset classes. Most intellectual property lands in Class VI (Section 197 intangibles other than goodwill). The allocation decides how much gain the seller reports and how much the buyer can amortize, so buyer and seller should negotiate it upfront and document it in the purchase agreement. Disagreements draw IRS attention.

Record the Transfer With the Right Agency

Signing the assignment transfers ownership between you and the buyer, but it does not protect the buyer against the rest of the world. Recording with the federal agency that granted the IP puts everyone on notice of the new ownership, and the deadlines are short.

Patent Assignments

Patent assignments are recorded with the USPTO through its electronic Assignment Center, with a recordation cover sheet attached to the signed assignment.⁹ Electronic recording is free; paper submissions cost $54 per property.¹⁰

Under 35 U.S.C. § 261, an unrecorded patent assignment is “void as against any subsequent purchaser or mortgagee for a valuable consideration, without notice,” unless it is recorded within three months of execution or before the subsequent purchase.² If the buyer does not record promptly, the seller could in theory sell the same patent again to someone who records first. Record immediately.

Trademark Assignments

Trademark assignments also go through the USPTO’s Assignment Center.¹¹ The recording fee is $40 for the first mark in a document and $25 for each additional mark in the same document.¹² The same three-month rule applies under 15 U.S.C. § 1060(a)(4): an unrecorded assignment is void against a later good-faith purchaser unless recorded within three months or before the subsequent purchase.⁴

Copyright Assignments

Copyright transfers are recorded with the U.S. Copyright Office through its online Recordation System.¹³ The base electronic fee is $95; paper submissions cost $125.¹⁴

The legal function differs from patents and trademarks. Under 17 U.S.C. § 205, recordation gives constructive notice of the transfer only if the work has been registered and the document identifies the work specifically enough to appear in a search. If two conflicting transfers exist, the first one executed wins as long as it is recorded within one month of execution (two months if executed outside the United States) or before the later transfer is recorded. Otherwise the later transfer prevails if recorded first by a buyer who paid value and had no notice of the earlier deal.¹⁵

Notarization

Neither the USPTO nor the U.S. Copyright Office strictly requires notarization to record an assignment. For both patents and copyrights, though, a certificate of acknowledgment from a notary serves as prima facie evidence that the document was properly executed.²³ Notarizing costs little and can head off an authenticity dispute later.

1
Office of the Law Revision Counsel. 35 U.S. Code 154 – Contents and Term of Patent; Provisional Rights
2
Office of the Law Revision Counsel. 35 U.S. Code 261 – Ownership; Assignment
3
Office of the Law Revision Counsel. 17 U.S. Code 204 – Execution of Transfers of Copyright Ownership
4
Office of the Law Revision Counsel. 15 U.S. Code 1060 – Assignment
5
Office of the Law Revision Counsel. 26 U.S. Code 1235 – Sale or Exchange of Patents
6
Office of the Law Revision Counsel. 26 U.S. Code 1221 – Capital Asset Defined
7
Internal Revenue Service. Net Investment Income Tax
8
Internal Revenue Service. Instructions for Form 8594
9
United States Patent and Trademark Office. Patents Assignments: Change and Search Ownership
10
United States Patent and Trademark Office. USPTO Fee Schedule – Current
11
United States Patent and Trademark Office. Trademark Assignments: Transferring Ownership or Changing Your Name
12
United States Patent and Trademark Office. USPTO Fee Schedule
13
U.S. Copyright Office. Recordation Overview
14
U.S. Copyright Office. Fees
15
Office of the Law Revision Counsel. 17 U.S. Code 205 – Recordation of Transfers and Other Documents