A: Choosing Your Entity and Jurisdiction
LLC, S-corp, or C-corp — what actually changes based on your state, your tax posture, and whether you'll ever want partners or a bank behind you.
Why entity choice matters more than it seems
Most owners pick an entity once, early, and never revisit it — often based on whatever a friend's accountant recommended or whatever the online formation service defaulted to. That's a mistake. Your entity choice determines how you're taxed, how exposed your personal assets are, how easy it is to bring on a partner or sell the business later, and how much paperwork you're on the hook for every year.
The good news: for most small and medium-sized businesses, the decision comes down to a short list of real options, each with clear tradeoffs.
LLC
A Limited Liability Company (LLC) is the default starting point for most owner-operated businesses. It shields your personal assets from business debts and lawsuits, and by default it's taxed as a pass-through — profits flow to your personal return, and the business itself pays no separate federal income tax.
An LLC can accommodate multiple owners (called "members") from the start, and its operating agreement can be customized to allocate profits, losses, and control however the owners agree — more flexibly than corporate stock. If you ever take on a silent investor, a family member's capital, or a bank loan requiring a personal guarantee from multiple owners, the LLC structure typically adapts more easily than converting a sole-proprietorship or single-member entity after the fact.
S Corp
Electing S-corp tax treatment (which can apply to either an LLC or a corporation) becomes attractive once the business is consistently profitable, typically once net income clears roughly $60,000–$80,000 a year. An S-corp lets you split income between a reasonable salary (subject to payroll tax) and distributions (not subject to payroll tax), which can meaningfully reduce your self-employment tax bill. The tradeoff is more payroll administration and stricter compliance requirements.
C Corp
A C-corp makes sense in a narrower set of cases: if you plan to raise outside investment from institutional investors, offer employee stock options at scale, or eventually sell. Absent one of those goals, most SMB owners should avoid C-corp status — it introduces double taxation (the corporation pays tax on profits, then shareholders pay tax again on dividends) with none of the offsetting benefits.
QSBS Considerations
However, if the plan is to eventually sell, it may make sense to be a C Corp for most qualifying SMEs.
Section 1202 QSBS lets a shareholder exclude gain from the sale of qualifying C-corp stock from federal income tax, subject to tests on holding period, the business's aggregate gross assets, and the type of trade or business. For stock acquired after July 4, 2025 under the One Big Beautiful Bill Act, the exclusion is tiered — 50% at 3 years, 75% at 4 years, 100% at 5 years — on gains up to $15 million per issuer, well above the prior $10 million (or 10x basis) cap and all-or-nothing 5-year rule. For a family business, that can mean tens of millions of dollars of sale proceeds never taxed federally, but only if the business has been a C-corp for the full holding period and the other eligibility boxes were checked well before a buyer shows up.
The most common mistake is running the business as an LLC or S-corp with no plan to convert, which means the QSBS holding-period clock never starts no matter how long the family has owned the company. Eligibility is tested as of when the stock was issued, not at sale, so fixing this needs to happen years in advance — waiting until a buyer is at the table is usually too late to capture meaningful benefit. The gross-assets and qualified-trade-or-business tests need the same early attention.
Converting to a C Corp starts its own tax analysis: the conversion has to be structured so the stock's holding period begins cleanly, and the corporation takes on corporate-level double taxation going forward in exchange for the future exclusion. With five or more years of runway before an expected sale, converting under the new tiered rules can be very attractive; converted too close to a sale, it captures little or nothing. It's worth running the actual numbers rather than treating it as a default move.
Succession planning in advance of a future sale also requires consideration of QSBS. QSBS is tested and capped separately for each shareholder, so several shareholders holding stock in the same company can each claim their own exclusion rather than splitting one cap — a real advantage for multi-owner family businesses. Stock received by gift or inheritance generally carries over the donor's or decedent's holding period and eligibility, which matters for how shares get distributed across generations. The planning question becomes less "does this qualify" and more "how do we get eligible stock into enough family members' hands, early enough."
In sum, businesses should consider QSBS long before a sale. First, confirm the entity has actually been a C-corp for the relevant holding period — if not, this is the moment to fix it, not after an offer arrives. Second, run the aggregate gross-assets test now, since it's measured at issuance, and document that the holding period and business activity line up with the requirements. Third, at three years out the owner sits right at the new 3-year/50% tier, so waiting even a year longer could meaningfully change the exclusion percentage captured.
Foreign Family Offices & Blocker Corporations
For international family offices directly investing in US corporations, oftentimes the first question is almost always what the investment's US tax footprint will look like — specifically, whether it will generate income effectively connected with a US trade or business, which triggers US filing and withholding obligations for the foreign owner personally. That answer drives everything downstream: whether a blocker corporation, a US LLC, or a direct investment makes the most sense. It needs to be answered before capital moves, not retrofitted after.
A blocker makes sense when a foreign investor wants to avoid filing US returns and having effectively connected income flow through to them directly — the blocker absorbs US tax at the corporate level, and the foreign owner simply receives dividends. It's overkill for passive, portfolio-style holdings that don't generate effectively connected income in the first place, where a blocker just adds a layer of corporate tax with no offsetting benefit. The right call turns heavily on the type of asset: operating business interests usually need one, pure portfolio investments usually don't.
FIRPTA changes the calculus for a family office buying US real estate versus an operating businesses, and applies specifically to a foreign person's gain on disposing of a US real property interest, imposing withholding — up to 15% of the sale price — on the buyer at closing; that regime doesn't apply the same way to the sale of an operating business interest unless the business itself is heavily weighted toward real property. A family office buying US real estate needs FIRPTA withholding built into the deal from the start, while an operating-business investment gets analyzed more generally under effectively-connected-income rules. Unprepared families are often surprised by the withholding hit at closing on the real estate side specifically.
A recurring pattern is a family investing through a structure optimized for one asset type — say, a blocker set up for an operating business — and then using that same structure for a real estate purchase where FIRPTA and different withholding rules apply, creating mismatches that are expensive to unwind. Another is treaty elections or entity classifications made without confirming the family's actual country of tax residence, which can undo the planning. Specific examples will vary by guest, but the underlying theme is usually structuring too early, for the wrong asset, without revisiting it as holdings diversify.
Treaty considerations matter most for families from Europe, the Middle East, or Latin America. Treaty benefits vary widely by jurisdiction — many European countries have long-standing US tax treaties that reduce withholding on dividends and interest, while large parts of Latin America and the Middle East either have no US treaty at all or a more limited one. That gap means the optimal structure for a European family office can look very different from the optimal structure for a family office in a non-treaty country investing in the same US asset. It's one of the first things to check, not an afterthought once the structure is already set.
Where to form your business
Startups chasing venture or other institutional capital often form in Delaware regardless of where they operate because that's what some private investors expect. For a business that isn't raising institutional capital, that logic mostly disappears. In almost all cases, you should form your entity in the state where you actually do business.
Forming out-of-state (a common pitch from formation services) usually just adds cost: you'll still need to register as a "foreign entity" in your home state, pay franchise tax fees in both states, and maintain a registered agent in a state you have no other connection to — with no offsetting legal benefit for a business that isn't raising VC or institutional money that specifically requires a Delaware incorporation.
B: Ownership Basics — What Owners Get Wrong Early
The ownership and buy-in mistakes that are cheap to fix in year one and expensive to unwind once the business has real value.
Verbal agreements don't survive success
The single most common ownership problem in small businesses isn't a bad deal — it's no deal at all. Two people start a business, agree informally on a 50/50 split or a rough sense of "who owns what," and never write it down. This works fine until the business is worth something, at which point everyone's memory of the original agreement conveniently favors themselves.
Every co-owned business needs a written ownership agreement from day one, even if the business is small and the owners are close friends or family. The agreement should state, unambiguously, who owns what percentage, what each owner contributed (cash, equipment, sweat equity, existing customer relationships), and how additional contributions will be valued going forward.
Sweat equity and unequal contributions
It's common for one owner to put in cash and another to put in time, or for ownership percentages to shift as one partner takes on more operational responsibility. These arrangements are legitimate, but they need to be documented with real numbers, not vague intentions — otherwise you're setting up a dispute for the day the business either struggles or succeeds beyond what anyone expected.
Assign a dollar value to sweat equity contributions, even if imperfect, rather than leaving it as an undefined "fair share"
Document any vesting schedule if ownership is earned over time rather than granted up front
Revisit and formally amend ownership percentages whenever a material change occurs — don't let the written agreement drift out of sync with reality
The minority owner problem
If you bring on a minority partner — someone who owns less than 50% — think through what rights they have beyond a share of the profits. Do they have a vote on major decisions? Can they block a sale of the business? Can they be removed, and under what circumstances? Silence on these questions doesn't protect the majority owner — it just means the answers get decided by state default law or a judge if a dispute ever arises, and default law is often more protective of minority owners than founders expect.
Getting a 409A or formal valuation isn't just for startups
SMB owners sometimes assume formal valuations are only relevant to VC-backed companies. In practice, any time you're issuing ownership to a new partner, buying out a departing one, or transferring interest to a family member, an informal handshake number invites disputes — and, in the case of gifts or transfers to family, can create unexpected tax exposure. A periodic, professionally-supported valuation, even a light one, is cheap insurance against all three problems.
C: Buy-Sell Agreements
What happens when a co-owner wants out, gets divorced, dies, or stops pulling their weight — and why you need this in writing before you need it.
The four events that end business partnerships
There's a shorthand for this in the legal world: death, disability, divorce, and disagreement. Any one of these can put a co-owner's stake in play, and if you haven't addressed it in advance, you're negotiating the terms under the worst possible conditions — grief, conflict, or a court order.
Death — without a plan, a partner's stake passes to their estate, potentially putting you in business with an uninvolved heir
Disability — most agreements are silent on whether a disabled partner still receives a full profit share indefinitely
Divorce — in many states, a spouse can have a marital property claim to a business interest acquired during the marriage
Disagreement — the most common trigger, and the one most likely to freeze decision-making without a resolution mechanism
What a Buy-Sell Agreement actually does
Generally, a Buy-Sell Agreement is a contract among owners (or between owners and the business) that answers one question in advance: if an owner leaves, what happens to their stake? Done well, it covers the triggering events that activate the agreement, the valuation method for pricing the departing owner's stake, the funding mechanism for actually paying for the buyout, and a right of first refusal that prevents an owner from selling to an outside third party without first offering the stake to existing owners.
Once ownership in a family enterprise spans generations, a buy-sell agreement has to work for owners who are active in the business, owners who are passive, and owners who may never work there at all, so it needs separate triggers and terms for each category rather than one set of rules written for founder-era simplicity. It also has to anticipate that the number of owners will keep growing as shares pass down, which means it needs a mechanism for bringing new family members in as parties without renegotiating from scratch each time. Governance rights and buyout rights often need to be decoupled at this stage, since not every owner should have an equal voice in running the company even if they hold an equal economic share. The agreement also needs a built-in review cycle, because terms written for the founding generation rarely fit cleanly three owners and two generations later.
Valuation
For most small businesses’ Buy-Sell Agreements, the single most common mistake is leaving valuation vague — "fair market value as determined by the parties" sounds reasonable until the parties can't agree, and now you're each paying for a competing business appraisal in the middle of a dispute. A better approach fixes the method up front: a formula tied to revenue or EBITDA, a fixed price revisited annually, or a pre-agreed appraiser. None of these is inherently right — the point is picking one while everyone's still getting along.
The Buy-Sell Agreement should specify the valuation method in advance — a formula, a rotating independent appraisal, or a pre-agreed multiple — rather than leaving "fair value" undefined and hoping the family agrees on a number when the time comes. Without that, the departing or deceased owner's side wants the highest defensible number, the remaining owners want the lowest, and with no process already agreed to, that disagreement becomes a lawsuit instead of a formula. Discounts for minority interests and lack of marketability also need to be addressed explicitly, since those can swing a valuation by 20–30% and are exactly the kind of detail families fight over after the fact. Getting this on paper while everyone is still on good terms is far cheaper than negotiating it mid-dispute.
Funding the buyout
Even a fair price is meaningless if the business can't pay it. For a death trigger, this is usually solved with a life insurance policy on each owner, sized to cover their ownership stake, with the business or the other owners as beneficiary. For a voluntary exit or disagreement, funding is more often structured as a promissory note — a down payment plus payments over several years, so the buyout doesn't drain the business's working capital in one shot.
Different funding mechanisms — insurance, installment notes, sinking funds — to fund a buyout should be considered. Here are the three most common funding mechanisms:
Life insurance funds a death-triggered buyout well because the cash shows up exactly when it's needed and doesn't strain the business's working capital, which is why it's the most common tool for that specific trigger.
Installment notes work for voluntary buyouts or retirements, spreading payments over years so the business isn't forced to take on debt or sell assets to fund a lump sum.
A sinking fund — cash set aside over time specifically for future buyouts — is the most conservative approach but requires discipline most small and/or family businesses don't maintain without a formal requirement in the agreement.
In practice, most well-structured agreements combine two of these: insurance for the unplanned trigger, installment payments for the planned one.
Outside capital
A buy-sell agreement needs to change once outside capital or a family office co-investor is in the mix.
An outside investor will generally require drag-along and tag-along rights that don't exist in a purely family-owned agreement, so family members can be compelled to sell alongside the investor in an approved transaction rather than blocking it indefinitely.
Additionally, valuation provisions usually need to shift from a family-agreed formula to something closer to fair market value or a third-party appraisal, since an outside investor won't accept a number the family controls unilaterally. The agreement also typically needs new transfer restrictions preventing family members from selling to a competitor or an unapproved third party, protecting the investor's own position. All of this needs to be negotiated before the capital comes in, not retrofitted afterward.
Most common problems
For small or family-owned businesses, a buyout triggered by something unplanned — a divorce, a death, a falling-out between siblings — can be difficult when a Buy-Sell Agreement was either silent on valuation or written decades earlier under completely different assumptions. The second common problem is one family member feeling the process was controlled by whoever happened to be running the business at the time, which turns a financial disagreement into a trust issue that's much harder to resolve. What usually would have prevented it is exactly what sounds unglamorous in the moment: a clear, pre-agreed valuation method and funding mechanism put in place while the relationship was still good, not after it was tested.
Finally, if the co-owners never formalized a partnership agreement, one may still exist — many states treat a business run by two or more people sharing profits as a general partnership by default, with each partner personally liable for the business's debts. If that describes your business, formalizing your structure and your Buy-Sell Agreement terms isn't optional paperwork. It's closing an open liability.
