A Founder's Guide to QSBS

Oct 7

19 min read

Updated: Oct 7

QSBS Planning Starts at Issuance | Jewel Investing Solutions | October 7, 2026

The best time to document QSBS eligibility is the day the stock is issued, not the week your company is acquired.

Picture the alternative. A buyer is deep in diligence. An investor's tax adviser asks what your company held in gross assets when their shares were issued four years ago. Your team is rebuilding cap tables, balance sheets and board approvals from old email threads while also negotiating the deal.

This guide helps founders build a QSBS documentation process that will avoid a scramble for information at exit. It starts with what QSBS is and what it can be worth, then covers what Section 1202 requires, what changed in 2025, when the holding clock starts, what to document at issuance, what to monitor as the company grows, and where SAFEs and convertible notes complicate the analysis. Remember, you don’t have to do this alone. Your finance team, tax adviser and legal counsel bring expertise that will help guide you through this process. This guide is educational, not legal or tax advice.

What QSBS Is and Why It Matters

Qualified small business stock, or QSBS, is stock that can qualify for a federal tax exclusion under Section 1202 of the Internal Revenue Code. Congress created it to reward people who put money or work into growing C corporations. If the stock qualifies and the shareholder holds it long enough, all or a portion of the gain on a sale can be excluded from federal income tax.¹

For stock acquired after July 4, 2025, the exclusion applies to gain up to the greater of $15 million per issuer or ten times the shareholder's basis in the stock.

Here is a simple, hypothetical illustration. An investor buys 1,000,000 shares for $10,000 in 2026 and sells them for $20 million at least five years later, and every requirement is met. Assume none of the issuer's dollar limit has been used before. The gain is about $19.99 million. Ten times basis is only $100,000, so the dollar limit is the larger figure. We use $15 million as an illustrative, unadjusted limit, because inflation indexing begins after 2026 and could raise the limit by the time of a sale five years later. Up to $15 million of that gain can be excluded from federal tax, which is roughly $3 million of tax using a simplified 20% federal capital gains assumption. State treatment varies, and not every state follows the federal rules.

The benefit is not limited to outside investors. A founder's own shares and an employee's shares can qualify when the company, the issuance and the shareholder meet the requirements, including stock received for services. Stock options are different. An option is not stock until it is exercised, which matters for the holding clock discussed below.²

Two features of the exclusion shape everything that follows. First, there is no IRS approval process in advance. The shareholder claims the exclusion on a tax return when the stock is sold and has to be able to support it, sometimes years after the stock was issued. Second, the exclusion belongs to the shareholder, but most of the facts behind it belong to the company: what it held in assets, what business it was in, and what it did with its own stock. A company that organizes those facts early makes life far easier for everyone who holds its shares.

What changed in 2025

Public Law 119-21, enacted July 4, 2025, expanded Section 1202 and adjusted the holding period requirements and gross asset limits among other things. The new exclusion percentages and $15M dollar limit, summarized in the table below, apply to stock acquired after July 4, 2025. The $75M gross assets limit applies to stock issued after that date. Acquisition and issuance dates must be analyzed separately where holding period carryover rules apply.¹

Rule	Acquired on or before July 4, 2025	Acquired after July 4, 2025
Holding period for exclusion	More than 5 years; 100% for stock acquired after September 27, 2010. Earlier acquisitions may have lower percentages.	3 years: 50%, 4 years: 75%, 5 years: 100%
Per-issuer eligible-gain limit	Greater of remaining $10M dollar limit or 10x qualifying adjusted basis	Greater of remaining $15M dollar limit or 10x qualifying adjusted basis
Gross assets by issuance date	$50M for stock issued on or before July 4, 2025	$75M for stock issued after July 4, 2025
Inflation indexing	None	Begins after 2026 for the cap and the asset limit

The dollar limit is reduced by eligible gain the shareholder has already used for the same issuer, with coordination between old and new stock. The 10x measure uses qualifying adjusted basis in shares sold during the tax year and does not count additions after original issuance. Married taxpayers filing separately have reduced dollar limits. The cap limits the gain eligible for the percentage exclusion; it is not a guaranteed tax-free amount.¹

Two practical points follow. First, the exclusion percentages and dollar limit depend on when each share was acquired, and the gross assets limit depends on when it was issued, so a company with issuances on both sides of the date needs to track them separately. Second, the $75M figure is a test of aggregate gross assets, not a valuation. We cover how that works below.

QSBS Qualification

QSBS depends on facts about the company and facts about the shareholder, and some of them must stay true after the closing date. In general terms:

Company Qualifications

The issuer is a domestic C corporation.
The company's aggregate gross assets, including those of any predecessor, never exceeded the applicable limit at any time from its formation until the issuance, and are at or below the limit immediately after the issuance, counting its proceeds.⁴
During substantially all the shareholder's holding period, the issuer must be a C corporation and meet the active-business requirements. Generally, at least 80% of its assets, by value, must be used in one or more qualified trades or businesses.³
Stock redemptions around the issuance date do not trip the redemption rules.

On the active business point, the statute excludes a long list of fields. Businesses in these fields generally do not qualify: health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services and brokerage; any business whose principal asset is the reputation or skill of its employees; banking, insurance, financing, leasing and investing; farming; certain natural resource extraction; and hotels, motels and restaurants.³ Companies that build and sell products, such as software or hardware, are less likely to be caught by these exclusions than service businesses, but the answer depends on what the company actually does and how its assets are used.

Shareholder Qualifications

The holder is a non-corporate taxpayer, such as an individual, trust or an owner of a pass-through entity.
The holder acquired the stock directly from the company at original issuance, in exchange for money, property other than stock, or services.²
The holder meets the holding period for the exclusion percentage claimed.

A company can document its own facts. It cannot guarantee an individual shareholder's tax treatment, and it should not try to.

Bring QSBS into the conversation when forming a C corporation or considering an entity conversion. Ask your finance person, tax adviser and legal counsel to review the structure, founder stock, issuance date and any vesting or election deadlines before the transaction. Converting an existing business does not automatically make its shares QSBS or count earlier ownership toward the holding period. The starting entity's tax classification and the transaction details matter.

When the Holding Clock Starts

The gain a shareholder can exclude depends on how long they hold the stock, and the clock starts on a different date for each type of security. For stock acquired after July 4, 2025, the exclusion steps up at three, four and five years. Getting the start date right is a recordkeeping task as much as a tax one, because the company's records are often the only proof.

Security	When the clock generally starts	What to watch
Common stock issued for cash, property or services	At issuance	Confirm it was issued directly by the company, and document gross assets on that date.
Restricted stock subject to vesting	At transfer if a timely Section 83(b) election is filed within 30 days of the transfer; otherwise as each tranche vests	A missed election can move the clock to each vesting date. Keep proof of filing.
Stock options	At exercise, not at grant	The company must meet the tests on the exercise date. Each batch of exercises starts its own clock. An exercise that produces unvested shares also requires review of the restricted-stock rules, including the 30-day Section 83(b) election.
Preferred stock in a priced round	At purchase	The closing calculations and financing documents are the key evidence.
Restricted stock units (RSUs)	When shares are delivered at settlement	Settlement often comes when a company has grown past the gross assets limit. Ask advisers early.
SAFEs	Depends on whether the SAFE is treated as stock, which is unsettled	Have advisers document their position. See the SAFE section below.
Convertible notes treated as debt	Generally when the note converts into stock	Whether the note is respected as debt is a question for your advisers. See the SAFE section below.

Treat this table as a starting point for a conversation with your tax adviser, not a conclusion. Holding period rules for stock received for services, including the Section 83(b) election, come from the general tax rules rather than Section 1202 itself.⁵

A Gross Assets Test is Not a Valuation Test

The most common mix-up is treating the $75M limit as a company valuation. It is a limit on aggregate gross assets: cash plus the adjusted tax basis of the company's other property, with property contributed to the company counted at its fair market value when contributed. A startup valued at $100M can have far less than $75M in gross assets, and a cash-rich company with a modest valuation can come close to the limit.⁴

Here is an example. A startup has $12M of aggregate gross assets immediately before it raises a $10M Series A. Because the proceeds count when the test is applied immediately after the issuance, the company should document both calculations at closing.

Step	Amount
Aggregate gross assets before issuance	$12M
Financing proceeds	+$10M
Aggregate gross assets immediately after	$22M
Applicable limit (stock issued after July 4, 2025)	$75M
Retain the calculation and the financial records behind it

In this simplified example, the calculation is $12M plus $10M, or $22M immediately after issuance. In practice, the finance person prepares the records and calculation, the tax adviser reviews the tax-basis, contributed-property and aggregation treatment, and legal counsel confirms the issuance and transaction facts. Retain the dated calculation and the reviewers' conclusions at closing. Four years later, "we were well under the limit" is a recollection; a supported closing record is evidence.

The Importance of Maintaining Records

The exclusion belongs to the shareholder, but most of the facts that support it come from the company. Investors can't reconstruct them alone. That matters for three reasons:

Only the company holds the evidence. Gross assets at issuance, proof of an original issuance, the description of the business, and any redemption history sit in your books and corporate records.
Investors and their advisers will ask. Some investors weigh potential QSBS treatment when they commit capital, and their advisers will want company-side facts years later when they prepare a return.
The work becomes harder with time. A calculation prepared at closing can be tied to current records. Rebuilding it during an acquisition may require old files and people who have since left.

Building the File

Make It a Joint Effort

JIS recommends founders start the review with the people who maintain your financial and corporate records. Your finance person may be an internal team member, an accountant or an outside finance partner. That person may also be your tax adviser, but the roles are not always the same. Include a tax adviser experienced with Section 1202 and legal counsel in the assessment, and agree on who will prepare, review and retain each part of the file.

The founder and finance person coordinate the records: financing proceeds, financial statements, asset schedules, cap tables, business activities and the history of issuances and repurchases. The tax adviser reviews the tax-basis calculations, applicable thresholds, asset-use requirements and tax treatment. Legal counsel reviews the stock and financing documents, original issuance, corporate actions, related-party facts and proposed repurchases or reorganizations. Tax and legal advisers should coordinate where those questions overlap.

Before Every Issuance

Before every issuance that could produce potentially qualifying stock, bring your finance person, tax adviser and legal counsel together for the review below. This includes priced rounds, SAFE and note conversions, and option exercises. Assign responsibility for preparing the calculations, checking the stock and transaction documents, resolving open questions and retaining the supporting records.

Confirm the company is a domestic C corporation.
Review whether the business falls within the qualified trade or business requirements.
Determine whether the security being issued is stock for Section 1202 purposes.
Review aggregate gross assets at every point since the company was formed, including those of any predecessor, to confirm they never exceeded the applicable limit, and calculate them immediately before issuance.
Calculate expected aggregate gross assets immediately after it, including the financing proceeds.
Identify which gross assets limit applies based on the issuance date.
Check whether related entities need to be aggregated.
Review past and planned redemptions or repurchases with counsel.
Note any other facts or transactions your advisers believe could affect treatment.

At Closing: The Issuance File

Have your finance person coordinate one permanent issuance file per financing and a single register that points to each file. Ask the tax adviser and legal counsel to identify the supporting records they need and retain their dated analysis with the file. Each file should hold:

Certificate of incorporation and relevant amendments
Board and shareholder approvals
Stock purchase, subscription or financing agreements
Cap table immediately before and immediately after the issuance
Stock ledger or electronic issuance records
Investor name, security, number and class of shares, issuance date
Purchase price or consideration, and evidence of payment
Gross assets calculations before and after issuance, with the financial records that support them
A description of the company's business activities
Redemption and repurchase history
Relevant legal and tax analysis, and Section 83(b) election documentation where applicable

The QSBS Register

The register complements your official cap table and stock ledger. It does not replace them. A useful version tracks:

Group	Fields
Who and What	Investor, security, shares, issuance date, purchase price, basis
Test Results	Gross assets before issuance, gross assets after issuance, original issuance confirmed
Which Rules	Acquisition date and issuance date, each relative to July 4, 2025
Evidence	Link to the supporting documents in the issuance file
Clock	5-year date for all stock, plus 3-year and 4-year dates for stock acquired after July 4, 2025
Upkeep	Annual review status

Give Investors a Company Attestation Letter

Eventually, every investor who hopes to claim the exclusion will need company-side facts to support it. The most useful way to meet that need is a practice we would like to see become standard on every financing: a company attestation letter. It is a dated, factual statement from the company, prepared by the finance person and reviewed by the company's tax adviser and legal counsel. It is delivered at closing, then refreshed each year and after significant events such as a new financing, a repurchase or a material change to the balance sheet.

A good letter states facts as of a stated date and the records that support them. It would typically cover:

Company legal name and investor name
The security, number of shares, issuance date, and purchase price or consideration
C corporation status at issuance
Aggregate gross assets immediately before and after the issuance, and how they were calculated
A description of the company's business activities and why the company believes they fall within the qualified business requirements
Redemption and repurchase history within the relevant look-back windows
Assumptions, open questions, the date, and who signed
Where supporting documentation can be requested

Equally important is what the letter is not. It is not an IRS determination, because the IRS does not certify QSBS in advance. It documents company-side issuance facts but does not establish every shareholder-specific requirement or guarantee an exclusion. Where the law is unsettled, as it is for some instruments, the letter should describe the open question accurately rather than assert a conclusion. The wording itself should come from your legal counsel.

Investors should ask for this letter, and founders who offer it up front make diligence easier on everyone. Investor rights agreements and side letters are a natural place to put the commitment, for example an agreement to deliver the letter within a set number of days of a request. Some standard investor rights agreements already include a commitment to provide the information investors need to claim QSBS on request.⁶

Keeping Eligibility Intact

Gross Assets After Issuance

The gross assets ceiling looks at the company's entire existence before the issuance, and then at the moment immediately after it. It is not an ongoing ceiling for previously issued stock. Later growth above the applicable limit does not, by itself, disqualify those shares. It can prevent a later issuance from qualifying. A current balance sheet alone does not establish that the historical test was met.⁴

For example, shares issued in 2026 when aggregate gross assets were $60M immediately after closing may satisfy this test if the company has historically stayed under the limit. Later growth to $100M does not by itself undo that result. Stock issued in a subsequent round while assets are above the applicable limit generally fails the test. This is why priced rounds need new calculations too.

Ongoing Business and Asset Considerations

Staying in the same business is not enough on its own. The active-business test looks at how the company's assets are actually used, so your balance sheet matters as much as your business description. At least 80% of the company's assets, measured by value, must be used in a qualified business. A few common situations can pull a company below that line³:

Working capital and research. Reasonably required working capital and investments reasonably expected to fund qualified research or increased working-capital needs within two years can count as active assets. After the company has existed for at least two years, no more than 50% of its assets can qualify solely under this working-capital rule. Retain budgets and plans supporting the use of financing cash.⁷
Portfolio investments. If more than 10% of the company’s net assets (what it owns minus what it owes) are held in stock or securities of corporations that are not qualifying subsidiaries, the company can fail the active-business test, subject to the working-capital exception.⁷
Real estate. If more than 10% of total asset value is in real property not used in the business, the company can fail the active-business test. Property the company uses to operate, such as its office or lab, counts as used in the business. Property it rents out to others or holds as an investment does not.⁷
Subsidiaries and development stage. When the company controls a subsidiary, the subsidiary's assets and activities are counted along with its own. Certain start-up and research activities can count as active even before revenue begins. Ask your advisers to apply these rules to your actual structure.⁷

A change in what the company does can matter too. An S corporation election, entity conversion, business pivot, asset sale or wind-down should prompt a call with your advisers before you act. Two details are worth knowing. The 80% test uses the value of the assets, while the gross assets limit uses tax basis, so the two numbers can differ. And the tests apply for substantially all of the time a shareholder holds the stock. The law doesn't define that precisely, so there is no percentage of time that is safe.³

Build a joint review with your finance person, tax adviser and legal counsel into the annual financial and legal calendar, ideally alongside the year-end close, and repeat it whenever something material changes. The finance person brings updated records. The tax and legal advisers confirm that the company is still a C corporation, still operating in a qualified business and still using its assets as described above, and they review any repurchases, acquisitions, reorganizations or conversions since the last review.

Save the supporting financial statements, tax records, board materials and transaction documents with each year's review, update the register's annual review status, and refresh the attestation letter.

Repurchases Can Affect Other Investors

A company buyback can affect a shareholder's QSBS, and not only the shareholder who sold. The rules focus on timing. They compare the date of the buyback with the date the stock being tested was issued, not with how long anyone has held their shares. Two rules apply:

Buyback from the investor or a related person. If the company buys more than a de minimis amount of its stock (explained below) from an investor, or from someone related to them, during the period from two years before to two years after that investor's stock was issued, the newly issued stock does not qualify. Related persons are defined under Sections 267(b) and 707(b).⁹
Large buyback from anyone. If, during the period from one year before to one year after a stock issuance, the company buys more than a de minimis amount of its stock and the stock purchased is worth more than 5% of the value of all its stock at the beginning of that two-year period, the stock issued in that window does not qualify. This applies even to investors who sold nothing.⁸

A buyback is disregarded if it is minimal. To count under either rule, it must involve more than $10,000 in total payments and more than 2% of the relevant stock. For the first rule, that means 2% of what the investor and related persons hold. For the second, it means 2% of all outstanding stock. The 2% is figured purchase by purchase, using the value of the stock at the time, and the percentages are added together. The 5% test in the second rule is measured against the value of all company stock at the start of the window. The regulation's exceptions, described below, can also cause a purchase to be disregarded.⁸

Here is how that plays out. A sufficiently large company repurchase from Investor A six months after a round can affect stock issued to Investor B in that round, even though B sold nothing. A repurchase in year four generally falls outside these redemption windows for stock issued four years earlier, but it may affect more recent or planned issuances. Investor A's own sale and holding-period treatment is a separate question.

The regulation disregards certain purchases. The main ones are purchases of stock an employee or director received for services, made as part of retirement or another genuine end of service; purchases from the estate or heirs of a deceased shareholder, if made within 3 years and 9 months of death; and purchases connected to a shareholder's disability, mental incompetency or divorce. Each has conditions. The employee exception covers stock received for services, so a founder who paid cash for shares may not qualify. A shareholder transferring stock directly to an employee or contractor, rather than selling it back to the company, is generally not treated as a company purchase. Ask counsel to document which exception, if any, applies before a buyback is approved.⁸

JIS best practice: have the finance person maintain a repurchase log with dates, sellers, related-party relationships, consideration, valuation support, outstanding stock and affected issuance dates. Before committing to a buyback, ask tax and legal advisers to review the log together, map both windows for each issuance and document any applicable exception. An annual review alone may come too late.

SAFEs and Convertible Notes

SAFEs deserve their own section because nobody can give a settled answer. We are not aware of published IRS guidance on whether a SAFE is stock for Section 1202 purposes. Practitioners have noted that a SAFE's own language describing itself as equity would not bind the IRS,¹⁰ and the profession has asked the IRS for broader Section 1202 guidance.¹¹ Convertible notes add a further wrinkle, since a genuine debt note generally produces stock only on conversion. The result is that SAFEs and notes need instrument-specific tax analysis. Do not assume every SAFE is, or is not, stock when signed.

The reason it matters is that the answer can change two things. It can change when the holding clock starts, and for instruments that straddle July 4, 2025, which rule set applies. It can also change which date the gross assets test is measured on. Put simply, your advisers should be able to answer three questions in writing:

When is the stock acquired for tax purposes?
Which date tests gross assets?
Is the instrument stock before conversion, and what is the basis for that view?

You do not need to resolve the tax analysis yourself. Your advisers should document their position, and your team should retain the supporting evidence. Retain the funding date, the conversion date, the instrument terms, gross assets calculations at both dates, and the conversion records. Keeping calculations at both dates is a documentation practice. It does not mean the company or the investor gets to pick whichever date produces the better result. Keep what you tell investors consistent with your advisers' documented position. In particular, avoid telling a SAFE investor that their clock started at funding unless your advisers have documented that conclusion. These records support the analysis, but they cannot cure a failed statutory requirement.

A company that skips this step is left guessing years later, with the investor and the adviser working from different recollections.

At Exit: The Evidence Chain

The discipline outlined above pays off at exit. A buyer's diligence team, or an investor's adviser preparing a return, may want to see the chain of evidence in order:

Corporate records
Financing documents
Cap tables
Gross assets calculations
Financial statements
Tax records
Business activity documentation
Redemption history
Annual QSBS reviews
Company attestation letters and investor information provided at closing

If that folder already exists, the request is a download. If it doesn't, the request becomes a project.

If an acquisition is on the horizon, talk to your advisers early. Rules such as the Section 1045 rollover and the treatment of stock received in a merger can preserve some of the benefit for shareholders who have not yet met the holding period, but each has its own conditions and deadlines.¹²

Questions For Your Team

Use the questions below in a joint financing conversation with your finance person, tax adviser and legal counsel. Agree on who will resolve each question and where the conclusion will be recorded:

Does this security constitute stock for Section 1202 purposes?
Which gross assets limit applies to this issuance?
Do any affiliated entities need to be aggregated in the gross assets test?
Could any recent or planned redemptions affect qualification?
When does the holding period start for each type of security we issue, including restricted stock, options and SAFEs?
Are our current business activities within the qualified trade or business requirements?
What will our attestation letter say, who signs it, and how often will we refresh it?
What records should we retain to support your conclusions?

Start At Your Next Closing

Good financial infrastructure is not only about knowing your numbers today. It is about keeping the information you will wish you had in five years.

Start by bringing your finance person, tax adviser and legal counsel together to review your founder shares or next issuance. Assign an owner for the records, identify missing information and document the questions that need to be resolved before closing. Then keep that file current as the company grows.

Building your financial infrastructure before a raise? Jewel Investing Solutions helps founders organize financial models, reporting, capitalization records and investor-ready information in coordination with their tax adviser and legal counsel.

This article is for educational and organizational purposes only and is not legal or tax advice. Eligibility depends on company-specific and shareholder-specific facts. Consult tax and legal advisers experienced with Section 1202. State tax treatment may differ from federal treatment.

Notes

IRC Section 1202(a) and (b), as amended by Public Law 119-21, Section 70431 (phased exclusion, $15M dollar limit, 10x basis measure, indexing and effective dates).
IRC Section 1202(c)(1): stock acquired at original issuance in exchange for money, property other than stock, or services.
IRC Section 1202(c)(2) and (e): active business requirement and qualified trade or business; excluded fields at Section 1202(e)(3).
IRC Section 1202(d), as amended by Public Law 119-21, Section 70431: aggregate gross assets limit, tested at all times before issuance and immediately after it.
IRC Section 83(b) and Treasury Regulation 1.83-4(a); IRC Section 1223. Holding period for property received for services, and the 30-day election.
Carta, A founder's guide to qualified small business stock (QSBS), 2026. Notes that many investor rights agreements, including the NVCA template, commit the company to provide information needed to claim QSBS on request.
IRC Section 1202(e)(2), (5), (6) and (7): subsidiaries, portfolio stock, working capital and real property.
IRC Section 1202(c)(3); Treasury Regulation 1.1202-2, including the exceptions in paragraphs (c) and (d).
Treasury Regulation 1.1202-2(a)(2) and (b)(2): de minimis amounts, which are exceeded only if aggregate payments exceed $10,000 and more than 2 percent of the relevant stock is purchased.
PKF O'Connor Davies, SAFEs and the Section 1202 Exclusion (2021).
RSM US, comment letter to the IRS requesting Section 1202 guidance, August 10, 2026.
IRC Section 1045: rollover of gain from the sale of qualified small business stock held more than six months into replacement stock.

Sources

[1] IRC Section 1202. Official 2024 Code text. Read with the 2025 amendments below. See (c) for issuance and redemptions, (d) for gross assets, (e) for active business, (f) and (h) for conversions and transfers, and (j) for offsetting short positions.

[2] Public Law 119-21 Section 70431. 2025 amendments, 139 Stat. 240-242. Covers phased exclusions, increased dollar limits, indexing and separate effective-date rules.

[3] Treasury Regulation 1.1202-2. Detailed redemption thresholds, aggregation calculations and exceptions.

[4] IRS Publication 550 Chapter 4. Read Gains on Qualified Small Business Stock for an IRS explanation of original issuance, active business and the two redemption rules. The 2025 publication retains older dollar and holding-period language in this section; use the amended statute for post-July 4, 2025 changes.

Rules reviewed October 6, 2026. JIS recommends closing reviews, a permanent issuance file, periodic reviews and event-driven updates. These are organizational best practices, not an IRS certification process or statutory annual filing requirement.