The Real Tax Rate on a Business Sale Isn't 20%

Here is what I hear in almost every first meeting with a business owner who is thinking about selling: "I know I'll pay capital gains - probably around 20% - so I figure I'll walk away with about 80 cents on the dollar." It is a clean number, easy to sketch on a napkin, and it comes from a real tax rate. The problem is that it describes one layer of the tax picture, and rarely the most consequential one.

The 20% federal long-term capital gains rate is real. It applies to the pure capital gain portion of a sale, on assets held more than a year, in the right entity structure. But before you stop there: add the 3.8% Net Investment Income Tax that kicks in above $200,000 of modified adjusted gross income - which a business sale almost always triggers. Add your state income tax, which runs from zero to 13.3% depending on where you live. Add depreciation recapture, taxed at ordinary income rates up to 37% on equipment and up to 25% on real property. Add ordinary income on accounts receivable, noncompete agreements, and earnout provisions - all common deal components that do not get capital gains treatment.

Business owners who have already been through a sale describe it plainly. In r/fatFIRE, a seller who completed a $6.1 million transaction called the 3.8% NIIT "a six-figure surprise" his CPA hadn't initially flagged. Another, selling a $4 million business, described LTCG combined with depreciation recapture and NIIT pushing his total tax bill above $1 million. That is a real number, on a real deal - not a worst-case scenario.

By the time you add up everything that applies to a typical sale, most business owners are looking at an effective blended rate somewhere between 35% and 50% - not 20%. Let me walk through where each piece comes from, and what you can actually do about it.

Why Does the 20% Rate Only Tell Part of the Story?

The 20% figure is not invented. It is the federal long-term capital gains rate for taxpayers in the top income bracket, and it applies when you sell a capital asset held for more than 12 months and recognize a gain. In the right circumstances, that rate applies to a portion of a business sale. The issue is that most people treat it as the whole answer, when it is more accurately described as the best-case federal floor on a portion of the transaction.

The first addition most sellers miss is the Net Investment Income Tax, commonly called the NIIT. Since 2013, taxpayers with modified adjusted gross income above $200,000 for single filers, or $250,000 for married filing jointly, pay an additional 3.8% on net investment income - which includes capital gains from a business sale. In the year a substantial transaction closes, virtually every business owner will exceed those thresholds. That brings the federal rate on capital gains from 20% to 23.8% before you have thought about a single state. As one seller in the r/fatFIRE community described it after completing a $6.1 million exit: the NIIT was "a six-figure surprise" his CPA had not initially flagged, as of July 2026.

State income taxes are the next layer, and the range is wide. A handful of states - Texas, Florida, Wyoming, Nevada, and a few others - have no income tax at all. Residents there stop at 23.8%. Everyone else adds something. California taxes capital gains as ordinary income, with a top marginal rate of 13.3%, pushing the combined federal and state rate to over 37% on the pure capital gain. New York sits at 10.9%. Oregon reaches 9.9%, Minnesota 9.85%, New Jersey 10.75%. Even Colorado at 4.4% and Arizona at 2.5% add meaningfully to a large transaction.

These numbers represent the best possible outcome on the capital gain portion: a sale where every dollar qualifies for long-term capital treatment, with no depreciation recapture, no ordinary income deal components, and a cooperative state. In practice, that scenario describes very few actual transactions.

State law also has complications that go beyond the headline rate. California, in particular, applies residency rules that can capture gains from a California-based business even if the seller has technically moved out of state before closing. The California Franchise Tax Board's position on income sourcing means that simply updating your driver's license address the month before a sale is not, in my experience, a reliable tax planning strategy. Residency changes need to be real, documented, and made well in advance of a transaction - and with qualified tax counsel reviewing the specifics.

So before we have discussed a single characteristic of your specific deal - what assets are included, what your depreciation history looks like, how the purchase price will be allocated - you are already looking at combined rates between 24% and 37% on the capital gain portion alone, depending on where you live. And for most business owners, the capital gain portion is a meaningful fraction of the total purchase price, not all of it.

Where Does Ordinary Income Show Up Inside a Business Sale?

Capital gains treatment is a privilege the tax code extends to the appreciation of capital assets - investments held for the long term, stock in a company, land.

When you sell a business, you are rarely selling just one thing. You are selling an assemblage: equipment, real estate, customer lists, goodwill, receivables, and in many deals a signed promise not to compete. Each component is treated differently under the tax code. Some generate capital gain. Others generate ordinary income at rates up to 37% federally. Understanding which is which changes the math considerably.

Depreciation recapture on equipment is the most common surprise. Under Section 1245 of the tax code, when you sell an asset that has been depreciated - vehicles, machinery, computers, furniture, leasehold improvements - the gain attributable to prior depreciation is taxed as ordinary income, not capital gain. If you bought a piece of equipment for $200,000 five years ago, depreciated it down to $80,000, and now sell it for $180,000, the $100,000 of recaptured depreciation is taxed at ordinary income rates. At a 37% federal rate plus state and NIIT, that $100,000 costs considerably more than capital gains treatment would.

A 34-year-old Wisconsin restaurant that sold for $500,000 illustrates this well. The owner had invested $200,000 in building improvements over the years, all of which had been depreciated on the books. By the time of the sale, the book value of the improvements was near zero. The tax professional's estimate: over $100,000 in taxes on a $500,000 sale - an effective rate on the gain of roughly 40%. The driver was not an unusually high statutory rate. It was depreciation recapture.

Real property gets its own treatment under Section 1250. The "unrecaptured Section 1250 gain" - the portion of real estate appreciation attributable to straight-line depreciation previously taken on buildings - is taxed at a maximum federal rate of 25% rather than 20%. That is still better than ordinary income rates, but higher than the long-term capital gains rate, and it catches sellers off guard who assumed all real estate gain would be taxed the same way.

Beyond depreciation recapture, several common deal components are taxed as ordinary income regardless of holding period:

• Accounts receivable in an asset sale are ordinary income. They represent earned but uncollected revenue - collecting them is not a capital event.
• Inventory is ordinary income. Goods held for sale in the ordinary course of business are not capital assets.
• Noncompete agreements are almost invariably ordinary income to the seller. The IRS treats a noncompete as compensation for a personal service obligation, not a capital transaction. Buyers and sellers frequently have directly opposing interests here: buyers want more allocated to a noncompete (it amortizes over 15 years), while sellers want less (it triggers ordinary income).
• Earnouts tied to continued employment are frequently reclassified as compensation and taxed as ordinary income. Even earnouts not tied to employment can face ordinary income treatment depending on how they are structured.

The allocation of purchase price among asset categories is formalized on IRS Form 8594, which buyer and seller must file consistently. This allocation is negotiated - and it matters enormously. As one seller in the fatFIRE community noted after a successful exit, his CPA firm's advice to "get as much of the price as possible allocated to goodwill" - which receives capital gains treatment - "saved me a huge amount in taxes." The sellers who understand this going into negotiation are in a much stronger position to push back when a buyer's proposed allocation is systematically working against them.

Why Does Deal Structure Matter as Much as the Tax Rate Itself?

Conversations about business sale taxes tend to focus on rates - 20%, 37%, 23.8%. But some of the largest differences in after-tax outcome come not from the rate itself but from how the transaction is structured: specifically, whether you are selling the assets of your business or your ownership interest in the entity itself. This single choice determines how much of the purchase price is treated as capital gain versus ordinary income, and it is the subject of almost every substantive negotiation in a middle-market deal.

Buyers almost always prefer asset sales. When a buyer acquires the assets of a business rather than the entity, they get a stepped-up tax basis equal to the purchase price. They can immediately begin depreciating equipment and amortizing intangibles from day one of ownership. They also avoid inheriting the entity's historical liabilities - unreported payroll taxes, undisclosed lawsuits, environmental issues, pending regulatory matters. The combination of tax efficiency and clean liability protection makes asset sales structurally attractive to any rational buyer.

Sellers almost always prefer stock sales. When you sell your stock or membership interests in an entity, the entire gain is generally treated as a long-term capital gain if you have held for more than a year. There is no allocation among asset classes, no depreciation recapture, no ordinary income on receivables or noncompetes. You sell your interest, recognize the difference between your proceeds and your basis in the stock, and pay capital gains rates on the whole thing. As one experienced seller noted bluntly: "Don't let the buyer structure it as an asset purchase. They'll try, but it'll likely shift some tax burden to you." He recommended spelling out stock sale terms in the letter of intent and requiring a gross-up if the buyer later pushed for an asset sale structure.

The opposing preferences create a predictable negotiating tension. The resolution often involves one party making a meaningful concession: either the seller accepts a modestly lower purchase price in exchange for stock sale treatment, or the buyer pays a premium to get the stepped-up basis they want. In practice, the tax benefit to the buyer of an asset sale can exceed the tax cost to the seller of one - which means there can be genuine room to split the difference at a price that leaves both parties better off than their starting positions.

C-corporations face the worst outcome in an asset sale: double taxation. The corporation pays corporate income tax on the gain from the asset sale at the entity level, and then shareholders pay capital gains tax again when the after-tax proceeds are distributed. Combined federal burdens in that scenario can exceed 50% before state taxes. This is precisely why C-corp founders work hard to achieve stock sale treatment, and why the Section 1202 Qualified Small Business Stock exclusion - which only applies to C-corps - can be so valuable when conditions are met.

S-corporations and LLCs taxed as partnerships avoid the double taxation problem. Gains flow through to owners' individual returns, with a single level of tax. That is a meaningful advantage in an asset sale relative to C-corp treatment. But pass-through entities still face ordinary income on depreciation recapture, receivables, noncompetes, and inventory in an asset sale. The entity type improves the math; it does not eliminate the ordinary income problem.

One more structural consideration: the One Big Beautiful Bill Act, signed into law in 2025, made certain changes to Qualified Opportunity Zone rules and modified aspects of QSBS treatment. If your business was formed as a C-corp and you have been holding shares for several years, it is worth a specific conversation with your advisor about whether recent legislative changes affect your situation. The rules are live, and they have been adjusted.

What Tax Planning Strategies Matter Most for Business Owners Preparing an Exit?

The effective rate on a business sale is not entirely fixed at the moment a buyer appears. Some of it is locked in by decisions made years earlier - entity type, depreciation choices, state of residence. But meaningful planning levers still exist, and the earlier they are engaged, the more remain open.

Section 1202 Qualified Small Business Stock (QSBS) is the single most powerful tool available to founders of C-corporations, and it remains underused. If you founded a C-corp, the company's aggregate gross assets at the time of original stock issuance did not exceed $50 million, and you held your shares for at least five years, you may exclude up to 100% of your capital gain - on the first $10 million or ten times your adjusted basis in the stock, whichever is greater - from federal capital gains tax entirely. That is not a rate reduction. It is a complete exclusion. Recent legislative changes under the One Big Beautiful Bill Act adjusted certain QSBS parameters, and there is increasing attention from founders and their advisors to maximizing the exclusion through strategies like QSBS "stacking" across multiple shareholders. The planning for this must happen at formation or conversion - not at the time of sale. One critical point: S-corp shareholders are categorically ineligible. QSBS requires C-corp stock at original issuance. An S-corp seller who discovers this after a buyer shows up has nothing to work with.

Installment sales under Section 453 allow you to spread gain recognition across multiple tax years when the buyer pays over time - through a seller note or structured payment arrangement. For sellers who would otherwise face the highest marginal rates in a single year, deferral can reduce the effective rate by keeping income out of the top brackets and, in some cases, keeping you below the NIIT threshold in each individual year. The tradeoff is extending credit to the buyer: you are accepting the risk that they fail to make future payments. Installment treatment generally requires careful credit analysis, a secured promissory note, and deal structuring - not just a tax calculation. Structured installment sales, involving a third-party financial institution as intermediary, can address default risk while preserving the deferral benefit.

Charitable strategies are worth considering for sellers with philanthropic goals and significant gain. A Charitable Remainder Trust can sell appreciated business interests without triggering immediate capital gains tax, reinvest the full proceeds, pay an income stream over the seller's lifetime, and ultimately benefit charity. A Donor Advised Fund allows a charitable deduction at fair market value in the year of contribution, which can offset a portion of the taxable gain in a high-income year. Neither tool is appropriate for every seller, but for those who already intended to give meaningfully at some point in their lives, doing it strategically in the year of a large sale can produce real tax savings.

Entity and ownership structure planning is where the longest runway creates the most leverage. Converting from a C-corp to an S-corp requires a five-year built-in gains holding period before full pass-through treatment applies. Recapitalizing ownership to improve basis, or shifting equity to family members in lower tax brackets, requires time to accomplish effectively and document properly. The sellers who keep the most from an exit are almost never the ones who called an advisor the month a buyer showed up. They are the ones who treated exit planning as an ongoing element of their financial strategy. As a Canadian wealth advisor put it in a video on business sale planning: "The most successful exits start five to ten years before the actual sale." That is as true in the U.S. as it is in Canada.

A business sale is usually the largest financial transaction a business owner ever completes. It is also, in my experience, the one most likely to be under-planned on the tax side - not because business owners are careless, but because the deal itself consumes all the available attention. Once a letter of intent is signed and due diligence starts, the pressure to close accelerates, and decisions that would ideally have taken two years to structure get made in two weeks. The tax consequences of those decisions are permanent.

What I try to tell clients well before a sale is in sight: the planning that moves the needle most happens before a buyer shows up. Entity structure, QSBS eligibility, depreciation choices, state of residence, charitable giving strategy - all of these have more leverage on your after-tax outcome than anything you negotiate once a deal is already in motion. In the r/fatFIRE community, an experienced deal advisor put it plainly: "Once you're in diligence, the window for the more interesting structures is basically closed." The sellers who keep the most are the ones who treated exit planning as a standing piece of their financial strategy, not a line item they added to their checklist six months before close.

If you are thinking about a sale in the next several years - or simply want to understand what your current structure would produce if you sold today - I am glad to walk through the numbers with you. At Modern Wealth, we work with entrepreneurs and business owners on exactly this kind of integrated tax and exit planning, as a fee-only fiduciary with no products to sell and no sales quota to hit. Understanding where you stand is almost always clarifying, and there are usually more options than people expect. Some of them are far less expensive - and much less stressful - than the tax bill you would pay without the planning.