6 Tax Strategies Founders Should Know Before Selling Their Company

6 Tax Strategies Founders Should Know Before Selling Their Company

The single largest tax event of a founder's life is the day the wire from the buyer hits. The decisions that determine the size of the tax bill on that wire were made years earlier.

By the time the LOI lands, most of the levers are gone. Holding-period clocks have run. Entity structures are locked. Residency is sticky. The cleanest tax outcomes belong to founders who treated the exit as a planning event five years before it happened.

Here are six strategies worth knowing — and the deadlines that decide whether they're available.

1. Qualified small business stock under IRC §1202 can exclude millions of gain

The single biggest break in the founder tax code is qualified small business stock — QSBS — under Section 1202 of the Internal Revenue Code. Founders holding original-issue C-corporation stock that meets the qualification tests can exclude a large block of gain from federal capital gains tax on a sale.

The size of the exclusion depends on when the stock was acquired. The One Big Beautiful Bill Act (OBBBA), enacted July 4, 2025, rewrote the regime:

• For QSBS acquired after July 4, 2025, the per-issuer exclusion is the greater of $15 million of gain or 10× basis. For stock acquired before that date, the older $10 million / 10× basis cap still applies.
• For pre-OBBBA stock, the founder generally has to hold for more than five years for the 100% exclusion. For stock acquired after July 4, 2025, OBBBA added a tiered holding period: a 50% exclusion at 3 years, 75% at 4 years, and 100% at 5 years.

The other qualification tests still matter:

• The stock has to be C-corp stock, originally issued. LLC interests and S-corp stock don't qualify.
• The C-corp's gross assets had to be at or below the cap at the time of issuance — $50M for older stock, raised to $75M for stock issued after July 4, 2025.
• The corporation has to use at least 80% of its assets in an active qualified trade or business (most service businesses — law, health, consulting, financial services — are excluded).

The holding-period clock is what kills most QSBS planning. A founder who flipped from LLC to C-corp last year and is exiting next year is at the bottom of the tier, if they qualify at all. A founder who set the C-corp up at incorporation and stayed disciplined can shelter eight figures of gain.

The exact dollar figures, indexing, and tier mechanics turn on your stock's issuance date — confirm your specific position with an exit-experienced CPA. Either way, this is a strategy set up at the beginning, not the end.

2. An installment sale spreads gain across multiple tax years

If the deal can be structured with seller financing — a portion of the purchase price paid over time rather than all at close — gain is generally recognized as payments are received under IRC §453, not all at once.

This matters in three situations:

• Federal capital gains brackets are progressive. Spreading a $20M gain across five years can keep a portion in the 15% bracket rather than the 20% bracket plus 3.8% net investment income tax.
• State residency may change between the sale year and later payment years. A founder moving from California to Florida between Year 1 and Year 3 can shift the state tax on those later payments.
• Cash flow needs are smoother. Founders who would otherwise have a one-year tax bill that wipes out a chunk of the proceeds get to match the tax to the cash.

Note: depreciation recapture and certain inventory gains can't be deferred via installment sale. The structure works best on capital-asset and goodwill components of the deal.

3. Purchase-price allocation is negotiated, not given

Asset deals allocate the purchase price across tangible assets, intangibles, and goodwill on Form 8594. Both parties have to file consistent allocations.

The allocation shifts real tax dollars:

• Goodwill and going-concern value, as Section 197 intangibles, produce long-term capital gain to the seller — taxed at preferential rates.
• Inventory, accounts receivable, and depreciable equipment produce ordinary income or depreciation recapture — taxed at ordinary rates.

A buyer who wants to amortize intangibles fast may push for less goodwill and more depreciable equipment. A seller wants the opposite — more goodwill, less depreciation recapture.

This is negotiated in the deal documents, often as an afterthought. The difference between a seller-friendly allocation and a buyer-friendly one can be seven figures of after-tax proceeds. CPA on Fire runs the allocation modeling before the LOI is signed — when the negotiation can actually move.

4. A charitable remainder trust funded with appreciated stock before the sale

A charitable remainder trust (CRT) funded with appreciated stock before the sale closes can defer the immediate gain, generate a current-year charitable deduction, and produce an income stream for the founder (and spouse) over a term of years or for life.

The mechanics: the founder transfers shares into the CRT. The CRT — a tax-exempt entity — then sells the shares without triggering immediate capital gains tax. The trust invests the proceeds and distributes payments to the founder under either a CRAT or CRUT structure (Treas. Reg. §1.664-1 through §1.664-4). At the end of the term, the remainder goes to the named charity.

The founder pays tax on the distributions as they're received, tiered under §664(b) — ordinary income first, then capital gain, then other income, then return of corpus. Spread across a 20-year term, the tax cost is materially lower than recognizing the gain all at once.

The trust has to be in place — funded with the stock — before any binding sale agreement is in place. A CRT created after the deal is signed is dead on arrival under the assignment-of-income doctrine.

5. State residency planning before the sale — but it has to be real

A founder selling a $30M business in California faces roughly 13.3% state tax on the gain — about $4M. A founder selling the same business as a Florida or Texas resident faces zero state income tax.

States know this. California's Franchise Tax Board in particular is aggressive about residency audits on founders who move shortly before a sale.

The factors that determine residency — domicile, days present, voter registration, driver's license, professional licenses, doctors, dentists, business presence, family ties — all have to actually change, with documentation. A founder who keeps the California house, the California kids in school, and the California social calendar but files a Texas return is going to lose the audit.

Founders who want this strategy need to start the move two years before the sale, document the transition like an audit is coming (because one is), and accept that the change has to be the life they're living, not a tax filing.

6. The F-reorg most LOIs don't mention

For S-corporation sellers, an F-reorganization under IRC §368(a)(1)(F) immediately before the sale can convert an inconvenient S-corp stock sale into a friendlier deemed asset sale for the buyer — while preserving the seller's S-corp tax treatment.

Without it, the buyer may demand a 338(h)(10) election or refuse the deal. With it, the buyer gets a basis step-up on the acquired assets (and the amortization that goes with it), the seller gets capital gains treatment, and both sides get a structure the lender and the bonding company will underwrite without flinching.

This is technical, deal-specific, and easy to miss in a self-handled exit. It's also one of the most common moves an exit-experienced CPA suggests in the diligence phase.

Find a CPA who plans for the exit before the LOI lands

The strategies above range from cheap to set up (purchase-price allocation modeling) to multi-year planning exercises (QSBS holding period, residency moves). None of them get easier after the deal is signed. Most of them get impossible.

CPA on Fire works with founders on exactly this stack — entity history review, QSBS positioning, CRT structuring, purchase-price allocation, and the F-reorg planning that decides what a buyer can actually offer. Read their Sam's List reviews and book an intro call before the next conversation with a banker, not after.