Pre-Sale Tax and Wealth Planning for Business Owners

For most founders, the sale of the business is the largest financial event of their life, and it happens once. The headline price is negotiated over months; the after-tax result is often decided years earlier by choices about entity type, ownership, residency and estate structure that cannot be made retroactively. Two owners who sell identical companies for the same price can walk away with materially different amounts depending on what they did, or did not do, in the three years before the letter of intent.

This guide walks through the main levers available to owners of US private companies, with notes on California, where top state rates make planning especially consequential. It is written for founders, family owners and their CFOs who want to understand the landscape well enough to ask good questions of their advisors. It is not a substitute for those advisors.

Why planning has to start 12–36 months before a sale

Most tax planning around a business sale is time-dependent. Some benefits require a minimum holding period. Some require that a transfer happen before the sale is legally or practically certain. Some depend on how much the business is worth on the date of a gift, and that value rises sharply once a buyer has named a price. By the time a letter of intent (LOI) is signed, many of the most effective options are either closed or materially weaker.

• Holding periods: Qualified Small Business Stock (QSBS) requires at least three to five years of holding depending on when the stock was issued, and the S corporation built-in gains period runs five years after a C-to-S conversion.
• The assignment-of-income doctrine: courts can treat a gift of shares made after a sale is effectively locked in as if the owner sold the shares and then gave away the cash. That turns a tax-efficient gift into a taxable sale followed by a gift.
• Valuation: a gift of a minority interest before any buyer is engaged can be appraised at a meaningful discount to its pro rata share of enterprise value. After an LOI, the appraiser must account for the pending deal price.
• Residency: a change of domicile has to be genuine and well established before the gain is realized. A move in the months before closing invites scrutiny.
• Clean-up: reorganizing entities, separating real estate, documenting personal goodwill and resolving equity grants all take time and are harder to do under diligence.

The headline price is negotiated over months; the after-tax result is often decided years earlier.

What tax actually applies to a capital gain

When an individual sells stock or a partnership interest held for more than one year, the gain is generally long-term capital gain. At the federal level, long-term capital gain is taxed at 0%, 15% or 20% depending on taxable income; a large sale pushes almost all of the gain into the 20% bracket. The net investment income tax (NIIT) adds 3.8% on investment income, including most capital gains, for taxpayers above modified adjusted gross income thresholds that are not indexed for inflation.

Not every dollar of a business sale is capital gain. In an asset sale, or a deemed asset sale such as a Section 338(h)(10) or 336(e) election, the purchase price is allocated across asset classes. Gain attributable to previously depreciated equipment is generally recaptured as ordinary income, gain on depreciated real property can be taxed at up to 25%, and payments for a seller’s non-compete covenant or a post-closing consulting or employment agreement are ordinary income. Inventory and receivables can also generate ordinary income. How the price is allocated is a negotiated term, and it matters.

California deserves particular attention. Because the state taxes capital gains as ordinary income, a top-bracket California resident pays roughly 37.1% on a long-term gain against 23.8% for a resident of a state with no income tax, more than half as much again. California also does not conform to several federal benefits, most importantly the QSBS exclusion discussed below, so federal planning does not always reduce the state bill.

Pass-through owners should also ask about California’s elective pass-through entity tax. For S corporations and partnerships, an election to pay state tax at the entity level can convert a capped individual deduction into a deductible entity expense for federal purposes. California has extended the regime beyond its original 2025 sunset; confirm the current rules and election deadlines for the year of sale.

Deal structure: the first lever

Before any standalone strategy, the structure of the transaction sets the baseline. Buyers generally prefer to buy assets, or to buy stock with an election that treats the deal as an asset purchase, because a basis step-up gives them future depreciation and amortization deductions. Sellers of C corporations generally prefer a stock sale, because an asset sale by a C corporation is taxed twice: once at the 21% corporate rate and again when proceeds are distributed to shareholders.

• C corporations: a stock sale avoids double tax but gives the buyer no step-up, which can reduce the price a buyer will pay. Some owners of C corporations have legitimate personal goodwill, meaning relationships and reputation that belong to the individual, which can be sold directly at capital gain rates if properly documented and supported. This area attracts IRS scrutiny and needs careful facts.
• S corporations: an asset sale or a deemed asset sale is common, because gain generally flows through once to shareholders. A pre-closing F reorganization is frequently used to give the buyer a step-up while preserving the S election history and allowing a tax-deferred rollover.
• LLCs taxed as partnerships: the buyer usually gets a step-up through the purchase of interests, and rollover into a partnership-structured buyer is generally straightforward.
• Purchase price allocation: within an asset sale, the allocation among equipment, real property, inventory, goodwill and covenants determines the ordinary-versus-capital mix. Both sides report the allocation to the IRS, so it should be agreed in the purchase agreement.

Qualified Small Business Stock (Section 1202)

Section 1202 lets a non-corporate shareholder exclude some or all of the gain on the sale of qualified small business stock from federal income tax. For founders of C corporations, it can be the single largest tax saving available. The basic requirements are demanding and should be confirmed by counsel for each issuance:

• The issuer must be a domestic C corporation, and the stock must have been acquired at original issuance in exchange for money, property or services, not purchased from another shareholder.
• The corporation’s aggregate gross assets must not have exceeded the statutory limit at any time up to and immediately after the issuance.
• During substantially all of the holding period, at least 80% of the corporation’s assets must be used in an active qualified trade or business. Many service businesses are excluded, including health, law, accounting, engineering, architecture, consulting, financial services and brokerage, as are banking, insurance, farming, extraction and hospitality.
• Redemptions by the company around the time of issuance can disqualify stock, and the exclusion applies to a sale of stock, not to an asset sale by the corporation.

The 2025 changes

The July 2025 federal tax legislation expanded Section 1202 for stock issued after its enactment on July 4, 2025. For that newer stock, the exclusion is tiered: 50% of the gain after three years of holding, 75% after four years and 100% after five years. The per-issuer cap rose from $10 million to $15 million (or, if greater, ten times the shareholder’s basis), with inflation indexing in later years, and the corporate gross-assets ceiling rose from $50 million to $75 million, also indexed. Stock issued before the enactment date stays under the prior regime: a five-year holding period for any exclusion, a $10 million or ten-times-basis cap and, for stock acquired after September 2010, a 100% exclusion.

Partial exclusions carry their own computations, including how the non-excluded portion is taxed, and the interaction with NIIT and the alternative minimum tax should be modeled by a tax advisor. Owners with stock from both regimes need a share-by-share analysis.

Practical points

• Converting an S corporation or LLC to a C corporation can start a new QSBS clock, but generally only appreciation after the conversion can qualify, because the basis for Section 1202 purposes is the fair market value of property contributed. The holding period then runs from the conversion.
• Gifts of QSBS to family members or to non-grantor trusts generally carry over the donor’s qualified status and holding period, and each recipient can have its own per-issuer cap. This “stacking” is widely used but must be structured carefully and before the sale.
• If QSBS is sold before the holding period is met, Section 1045 may allow tax-deferred reinvestment of the proceeds into other QSBS within 60 days, provided the stock was held more than six months.
• California does not allow the QSBS exclusion. A California resident pays full state tax on the gain even when the federal exclusion applies.

Deferral tools: installment sales and rollover equity

Installment sales

When part of the price is paid after the year of sale, typically through a seller note or an earnout, the installment method under Section 453 generally lets the seller recognize gain as payments are received rather than all at closing. The tax rate is not reduced, but deferral has time value, and spreading recognition can sometimes keep a portion of the gain in lower brackets.

• Depreciation recapture is recognized in the year of sale regardless of when cash arrives, which can create tax without matching cash.
• When a seller’s outstanding installment obligations from sales over $150,000 exceed $5 million at year-end, Section 453A imposes an interest charge on the deferred tax, which erodes the benefit for large notes.
• Pledging the installment note as collateral for a loan is generally treated as a payment, triggering gain.
• The real risk is credit risk: a seller note is an unsecured or subordinated loan to a leveraged buyer. Tax deferral is not a reason to accept a note you would not otherwise accept.
• For California residents, installment payments from a sale of intangible property made while a resident generally remain taxable by California even if the seller later moves.

Rollover equity

Private equity buyers frequently ask sellers to reinvest, or roll over, a portion of proceeds into the acquiring entity, often 10% to 40% of equity value. If structured correctly, the rolled portion can be exchanged on a tax-deferred basis, typically under Section 721 when the buyer’s holding company is a partnership or Section 351 when it is a corporation and the transferors meet the control requirement. The seller pays tax only on the cash received; gain on the rolled portion is deferred until the new equity is sold.

Tax deferral is not automatic. A rollover into a corporate buyer that fails the Section 351 control test can be fully taxable, and any cash or other property received alongside the equity is generally taxable boot. The buyer’s structure, the order of steps and the drafting of the contribution agreement all matter. For S corporation sellers, an F reorganization before closing often makes a tax-deferred rollover into a partnership buyer possible.

Charitable strategies: CRTs and donor-advised funds

Owners with charitable intent can reduce tax on a sale by giving appreciated shares before the sale rather than cash after it. The timing rule is strict: the gift must be completed before the sale is substantially certain. A signed definitive agreement almost certainly closes the window; a signed LOI may as well, depending on its terms and the surrounding facts. Plan these gifts before marketing begins.

Charitable remainder trusts

A charitable remainder trust (CRT) is an irrevocable trust that pays the donor, or other beneficiaries, an annuity or a percentage of trust assets for life or a term of up to 20 years, with the remainder going to charity. The trust is generally exempt from income tax, so when it sells contributed shares, it reinvests the full proceeds. The donor receives a partial income tax deduction for the present value of the charity’s remainder interest, and distributions are taxed to the beneficiary as they are paid, under ordering rules that pass out the deferred gain over time.

• A CRT cannot hold S corporation stock without terminating the S election, so S corporation owners usually need a different approach, such as contributing assets or using an alternative structure designed by counsel.
• The payout rate must be at least 5% and the actuarial value of the charity’s remainder must be at least 10% of the contributed amount.
• Contributions of closely held stock require a qualified appraisal, and the trust must not be obligated to sell to the buyer at the time of the gift.
• The arrangement is irrevocable: the donor gives up the remainder permanently.

Donor-advised funds

A donor-advised fund (DAF) is an account at a public charity sponsor. A gift of appreciated long-term property to a DAF generally produces a deduction at fair market value, subject to an annual limit of 30% of adjusted gross income for appreciated property, with a five-year carryforward. Because the sale year is the year of highest income, many owners concentrate several years of intended giving into a DAF in that year. Not every sponsor accepts private company stock, so line one up early. The 2025 legislation also introduced, beginning in 2026, a floor on itemized charitable deductions and a cap on the value of itemized deductions for top-bracket taxpayers; confirm how these affect the size and timing of a gift.

Estate-planning transfers before a sale

Owners whose net worth will exceed the federal estate tax exemption after a sale often move part of the future proceeds out of their taxable estate before the business is priced. The federal basic exclusion is $15 million per person for 2026, indexed thereafter under the 2025 legislation, and the top estate and gift tax rate is 40%. California does not impose its own estate or gift tax. Assets kept until death generally receive a basis step-up, which is a reason some older owners hold rather than sell; that decision belongs in the same conversation.

Gifting minority interests

A gift of a non-controlling, non-marketable interest in a private company is generally valued below its pro rata share of the whole, because a hypothetical buyer of that interest cannot direct the company or easily sell. Discounts for lack of control and lack of marketability are fact-specific and must be supported by a qualified appraisal. Recapitalizing into voting and non-voting shares lets owners transfer economics while keeping control. Once a buyer’s price is known or reasonably foreseeable, an appraiser must take it into account, and discounts narrow or disappear. That is why these transfers belong before the LOI and ideally before a process starts.

Grantor retained annuity trusts (GRATs)

A GRAT is an irrevocable trust to which the owner contributes shares while retaining an annuity for a fixed term, often two to five years. If the trust’s assets grow faster than an IRS-prescribed interest rate, the excess passes to beneficiaries free of gift tax; a GRAT can be structured so the taxable gift is close to zero. A GRAT funded with shares shortly before a sale at a higher price can move significant appreciation. The main risks are that the owner must survive the term for the transfer to work, and that a transfer made when the sale price is already known may be valued at that price.

Sales to intentionally defective grantor trusts (IDGTs)

An IDGT is a trust that is outside the owner’s estate for estate tax purposes but treated as owned by the owner for income tax purposes. The owner typically seeds the trust with a gift and then sells shares to it in exchange for a promissory note at the applicable federal rate. Because the trust is a grantor trust, the sale is generally not a taxable event, and the owner’s payment of the trust’s income tax each year acts as a further tax-free transfer. When the company is later sold, appreciation above the note accrues to the trust. These structures require careful drafting, defensible valuations and commercially reasonable terms.

Entity type and conversion timing

Entity choice affects both the tax a seller pays and the structure a buyer will accept, and changing it takes time to become effective.

• C to S: a C corporation that elects S status is subject to the built-in gains tax under Section 1374 on appreciation that existed at conversion if the assets are sold within the five-year recognition period. The tax is imposed at the corporate rate, currently 21%, on top of the shareholder-level tax. An asset sale inside the window gives up much of the benefit of converting.
• S or LLC to C: may make sense to start a QSBS holding period where the business qualifies and an exit is expected more than three to five years out. It adds corporate-level tax on operating income in the meantime and the double-tax issue in an asset sale.
• S corporation hygiene: buyers’ counsel will test whether the S election has been valid throughout. Disproportionate distributions, ineligible shareholders or a second class of stock can jeopardize it. Clean these up before a process; protective elections and IRS relief take months.
• Real estate: owners often hold property in a separate entity and lease it to the company. Decide early whether property will be sold with the business, kept and leased to the buyer, or sold separately, because each path has different tax and valuation consequences.

Residency and domicile

Because state tax is a large component of the total for California residents, some owners consider relocating before a sale. In general, a state taxes its residents on all income and nonresidents only on income sourced to the state. Gain on the sale of stock, an intangible, is generally sourced to the seller’s state of residence. Gain flowing through an S corporation or partnership from an asset sale is generally apportioned based on where the business operates, so a California-based business can generate California-source income for a seller who has moved.

Residency is decided by facts, not declarations. California looks at domicile and at where a person has the closest connections: time spent in the state, the location of a primary home, family, professional advisors, doctors, club memberships, vehicle registration, voter registration and where the person conducts business. The Franchise Tax Board audits high-income departures, and the burden of showing a genuine change typically falls on the taxpayer. California can also tax income that accrued while the person was a resident, and, as noted, installment payments on a sale made while resident.

Comparing the strategies, with a worked example

An illustrative worked example

Consider a founder who is a California resident and owns 100% of a C corporation in a qualifying industry. The stock was issued to the founder in 2018 at a basis of $1 million, and a buyer agrees to purchase the stock for $30 million in cash. The example compares three outcomes: no planning, the same sale where the stock qualifies as QSBS under the pre-2025 rules, and a sale where the founder contributed 10% of the shares to a charitable remainder trust before marketing began.

Three observations. First, QSBS saves about $2.4 million of federal tax in this example and nothing at the state level. Second, the CRT does not maximize cash: it trades $3 million of immediate proceeds for an income stream, a partial income tax deduction and a gift to charity. It suits owners who would have given to charity anyway. Third, a lower-tax state would remove the $3.9 million California line in Scenario A, which is why residency gets so much attention and so much scrutiny.

Planning timeline and advisory team

Assembling the advisory team

Pre-sale planning fails most often because advisors work in sequence rather than together. The estate attorney drafts a trust that the tax advisor did not model; the banker negotiates a structure that undercuts a QSBS position; the wealth manager is introduced the week before closing. Bring the team together early and give one person, usually the owner’s CPA or a family office lead, responsibility for coordinating.

After the sale: wealth management decisions

The day after closing, an owner whose wealth was concentrated in one operating business holds cash, rollover equity, an escrow receivable and possibly an earnout. The priorities in the first year are usually defensive.

1. Pay the tax. Set aside federal and California tax in safe, liquid instruments before investing anything else. Use the estimated tax safe harbors where they apply, and note that California’s estimated payment schedule is front-loaded relative to the federal one.
2. Take a deliberate pause. Many advisors recommend holding proceeds in short-term Treasuries or similar instruments for several months while the plan is finalized. A large sum is not an emergency.
3. Write an investment policy. Define spending needs, risk tolerance, liquidity and time horizons for each pool of money, including trusts created before the sale, which may have different beneficiaries and objectives.
4. Manage the rollover position. Rollover equity is illiquid and concentrated; plan around it rather than treating it as part of a diversified portfolio.
5. Review protection. Update the estate plan, beneficiary designations, umbrella insurance and asset protection now that wealth is liquid and visible.
6. Choose advisors on structure, not pitch. Understand whether an advisor is a fiduciary, how they are compensated and who holds custody of assets.

Laurent Capital advises owners of lower middle market companies on sell-side processes, recapitalizations and exit planning. We do not provide tax, legal or investment advice, but we work alongside owners’ tax, estate and wealth advisors so that the structure we negotiate supports the plan they have built, and we encourage owners to start that work well before going to market.