You are founding a company. You have been developing software or other intellectual property, and you plan to contribute that IP, along with some cash, to a new C corporation in exchange for your founder stock.
You also have QSBS in mind. For stock issued today, Section 1202 generally limits the eligible gain you can exclude to the greater of $15 million or 10 times your basis in the stock, subject to its other requirements. For this purpose, a special rule takes account of the fair market value of the property you contribute. So the value of your IP at formation can matter a great deal later.
Assume the contribution qualifies for tax-free treatment under Section 351. The regulations require you to attach a statement to your tax return reporting the fair market value and tax basis of the property you transferred.
That creates a practical problem. You may not know what the contributed IP is worth, and you may not have an appraisal to support the number you are being asked to report.
The contributed IP may already generate revenue, or it may still be in development—a prototype, early code, designs or other work product. Either way, its fair market value may be difficult to determine.
What value do you report? If you put down a good-faith estimate without an appraisal, are you bound by that number when you later sell your stock and claim the QSBS exclusion? And how do you arrive at a supportable value for the IP without a professional appraisal?
This is not a new valuation problem. But when a startup can become enormously valuable very early, the value of the IP contributed at formation deserves closer attention. A founder whose eventual gain falls within the $15 million limit may never need the 10x basis rule. A founder whose gain greatly exceeds that limit may care a great deal about what the contributed IP was worth—and what the founder reported on a tax return years earlier.
The quandary
The value that counts is the property's actual fair market value on the transfer date, not whatever the statement says. Under Section 1202(i)(1)(B), that value becomes your basis for the 10x limit. If the property was actually worth $10 million at transfer, the $100 million limit beats the $15 million floor only once your gain after the contribution exceeds $15 million.
The value cuts both ways. A higher value for the contributed IP can increase your basis for the 10x exclusion limit. But it also means more appreciation occurred before the contribution, and Section 1202 does not exclude that appreciation when you later sell your stock. A lower value means less pre-contribution appreciation, but a smaller basis for the 10x limit.
You therefore cannot simply choose the most favorable number. The same transfer-date fair market value governs both calculations. That makes getting the value right important even though the contribution itself produces no immediate tax.
For stock acquired before July 5, 2025, the dollar limit is $10 million rather than $15 million.
The hard part is determining what the IP was worth at formation. The statement is filed with your return for the year of the exchange, so you have some time to develop the analysis. But a founder may reasonably hesitate to pay for an appraisal at formation. That is the quandary: the return asks for a value now that could have substantial tax consequences years later.
What to do
- List the basis. You know this one, and it's often zero for self-created IP.
- Report a supportable, good-faith dollar estimate, and say how you got it. I would not assume that a good-faith estimate on a Section 351 statement fixes the property's value forever, particularly when it was expressly identified as an estimate made without an appraisal. But I would not treat that number as inconsequential either. If you later claim a different value, expect to explain the difference and support it.
The better approach is to report an estimate you can show your work for. Depending on the property, the estimated cost to recreate the work completed so far may provide a starting point, although replacement cost does not necessarily equal fair market value. Explain the method, assumptions and limitations rather than supplying an unexplained number.
For example:
Estimated fair market value: $[X], based on [describe method and assumptions]. The property's fair market value is uncertain. This estimate was prepared without an independent professional appraisal.
That caveat describes the estimate honestly. It does not excuse an arbitrary number or guarantee that you can change it later.
A value you reported earlier can be used as evidence against a later, inconsistent position, though it isn't necessarily conclusive. A stronger rule, the duty of consistency, generally applies when there was (1) a representation or report by the taxpayer, (2) on which the IRS relied, and (3) a later attempt, after the limitations period for the earlier year has closed, to change that representation or recharacterize the situation in a way that harms the IRS. In Janis v. Commissioner, 461 F.3d 1080 (9th Cir. 2006), the doctrine held heirs to the discounted estate-tax value of an art collection when they later claimed a higher income-tax basis. Janis was an estate valuation case, not a § 351 or QSBS dispute, and we are not aware of a case applying the doctrine to a founder's § 351 statement.
- Keep a contemporaneous memo, and a folder. Note what existed on the transfer date (code, customers, revenue, any term sheet) and how you reached the estimate. Put everything in one folder now, so a later valuation isn't an archaeological dig. Ask a valuation firm for its document list now.
- Get an appraisal when the stakes justify it, and before you rely on a big number. Nothing requires a valuation at formation; § 1202 doesn't, as FBT Gibbons notes. If you later rely on a large 10x basis, a retrospective appraisal may help substantiate the transfer-date value, depending on the available records and the quality of the analysis. Your return preparer, often a CPA, signs that return and has their own standards and penalty exposure under § 6694, so expect them to ask for support.
Some founders want to skip the number. We've seen language like:
"Fair market value: uncertain, unknown; of equal value to the property exchanged [the stock received]."
"Unknown value. Valuation unknown. Founder not willing to pay eight grand for a valuation at this time. Valuation unknown."
We understand the impulse. But neither supplies a dollar value, so neither satisfies the regulation, and neither changes the actual FMV that governs.
Having a lawyer engage the valuation firm
Some advisers have the founder hire a lawyer, and the lawyer engages the valuation firm. This is a Kovel-style arrangement, after United States v. Kovel, 296 F.2d 918 (2d Cir. 1961). The idea is that the appraisal stays confidential while it informs the advice, with a defensible analysis on hand if the IRS questions the 351 or your QSBS basis.
Don't count on the confidentiality. Kovel protects communications that help a lawyer give legal advice, not valuation work as such. In United States v. Richey, 632 F.3d 559 (9th Cir. 2011), an appraisal commissioned through a law firm and attached to a return was held neither privileged nor work product; it would have been prepared regardless of any audit. See Robert Wood's 2019 article. And if you later rely on the appraisal to support your basis, expect any protection to be waived.
Two more limits. The statement still has to report a dollar value. And the value you report should reflect your best evidence, including any appraisal you hold. If you report a value different from an appraisal, document the reasons.
What the rule actually requires
Treas. Reg. § 1.351-3(a) requires every "significant transferor" to attach a statement to their return for the year of the exchange. Under § 1.351-3(d), that means anyone who owns at least 1% (by vote or value) of the corporation right afterward, for stock that is not publicly traded. The statement must include:
- the name and employer identification number (if any) of the transferee corporation;
- the date or dates of the transfers;
- "the fair market value and basis of the property transferred by such transferor in the exchange, determined immediately before the transfer," aggregated by the regulation's four categories (for most founders, everything lands in the catch-all bucket); and
- the date and control number of any private letter ruling issued for the exchange.
The statement doesn't create the tax-free treatment. But the rule expressly asks for fair market value and basis, and there's no box for "unknown."
"But our investors priced us at $10M pre"
A pre-money isn't the fair market value of what you contributed. Investors price discounted future potential and buy preferred stock that's worth more than founders' common. Andersen and Baker Tax Law both caution against treating it as FMV. A round shortly after formation is evidence of value, not proof of it. An unsupported valuation position could also raise accuracy-related penalty issues under § 6662.
FAQ
What documents should you collect at the outset so a valuation can be done later?
Your cap table and formation documents, the IP or asset assignment with an inventory of what was transferred, and a dated snapshot of the code repository. Add financials and revenue, customer contracts and pipeline, any term sheets or offers, records of what it cost to build, comparable deals, and a dated memo tying it together.
What happens if you don't keep that documentation?
A valuation can still be reconstructed, but it's harder, costlier and easier to attack. If your 10x basis or pre-contribution gain is challenged, you'll be in a weaker position, and the burden of proving value is on you.
What if no Section 351 statement was filed?
The statement is required under Treas. Reg. § 1.351-3. In our view, omitting it generally should not undo an otherwise qualifying domestic exchange, because § 351 turns on its statutory requirements, and it should not automatically eliminate the § 1202(i) contribution-date FMV basis rule. That is a reasoned conclusion, not a directly on-point QSBS holding. A 2013 Tax Adviser item reviewing the case law concludes that nonrecognition is generally mandatory and that procedural filing requirements don't operate as an election. You still must substantiate the contribution, its date, the property transferred and its value. Check both your return and the corporation's, and have your return preparer evaluate corrective filings.
Where this leaves the founder
The authorities discussed here do not squarely resolve how an estimated value reported on a founder's Section 351 statement affects a later claim based on a different, substantiated contribution-date value.
There is no entirely satisfactory answer for the founder being asked to report a value before anyone has done a serious valuation. But the stakes change when you claim the exclusion. Before claiming a $100 million exclusion on the theory that your contributed IP was worth $10 million, I would want a formal, independent valuation supporting that contribution-date value. A $10 million pre-money financing valuation, standing alone, is not enough.
An appraisal does not guarantee the result. But claiming an exclusion of that size without credible valuation support could invite a substantial tax adjustment and accuracy-related penalties.
Until the authorities settle the question, the answer stays the same: an uncertain valuation calls for a supportable estimate and contemporaneous documentation. The statement reports value; it does not create it.
