The tax implications of buying a business turn on a handful of early decisions: whether you buy the company’s assets or its ownership shares, how you divide the purchase price among what you’re acquiring, how you finance the deal, and how carefully you check for liabilities the seller is leaving behind. Those choices set your depreciation deductions for years, decide whether you inherit the seller’s tax problems, and can shift the real cost of the acquisition by six figures or more.
Asset Purchase or Stock Purchase
Every acquisition is either an asset sale or a stock sale, and almost every other tax question follows from that split.
In an asset sale, you buy specific items out of the business: equipment, inventory, customer relationships, intellectual property, whatever you negotiate for. You leave most liabilities behind. The main tax prize is a stepped-up basis. Each asset’s tax value resets to what you paid, so depreciation and amortization start fresh at current fair market value. Equipment the seller wrote off years ago gets a new life on your books.
A stock sale is different. You buy the owner’s shares, which means you take the entire legal entity, every contract, every asset, and every liability. The assets keep their existing tax values under carryover basis, so your future deductions are limited to whatever depreciation the seller hadn’t already used. Anything the company owes, including tax problems you may not discover for months, comes with it.
Buyers usually prefer asset deals for those reasons. Sellers often prefer stock deals, especially when the business is a C corporation. That tension is where most of the deal negotiation happens.
Allocating the Price Among the Assets
In an asset purchase, you and the seller have to agree on how the total price is split across the individual assets. That allocation sets your tax basis in each one, which controls how large your deductions are and how fast they come.
Federal law requires the “residual method,” where the price fills asset classes in order of fair market value and whatever is left spills into goodwill.1Office of the Law Revision Counsel. 26 U.S. Code 1060 – Special Allocation Rules for Certain Asset Acquisitions Both sides report the agreed allocation on IRS Form 8594 with their returns.2Internal Revenue Service. Instructions for Form 8594 – Asset Acquisition Statement Under Section 1060 A written agreement binds both parties unless the IRS finds it inappropriate, and filing different numbers is a reliable way to invite an audit.
The allocation is genuinely negotiated because what helps you often hurts the seller. Weighting more of the price toward equipment and other short-lived assets gives you faster deductions. Pushing dollars into goodwill locks you into amortizing those dollars over 15 years.3Office of the Law Revision Counsel. 26 U.S. Code 197 – Amortization of Goodwill and Certain Other Intangibles A non-compete signed as part of the deal is also a 15-year Section 197 intangible, even if the non-compete itself only runs three or four years. For most deals, an independent appraisal pays for itself here.
Writing Off What You Bought
Once the price is allocated, you recover each asset’s cost through annual deductions. Tangible assets (vehicles, machinery, buildings) are depreciated. Intangibles (goodwill, customer lists, patents) are amortized over 15 years.4Internal Revenue Service. Intangibles Two provisions can pull most of your tangible-asset deductions into the first year.
Section 179 Expensing
Section 179 lets you deduct the full cost of qualifying equipment and certain other property in the year you place it in service.5Office of the Law Revision Counsel. 26 U.S. Code 179 – Election to Expense Certain Depreciable Business Assets For 2026, the maximum deduction is $2,560,000, with a phaseout that begins once qualifying purchases exceed $4,090,000 and eliminates the deduction entirely at $7,150,000. These limits adjust each year for inflation.
Bonus Depreciation
Bonus depreciation sits on top of Section 179 and has no dollar cap, so it applies even in very large acquisitions. The One Big Beautiful Bill Act permanently restored 100% bonus depreciation for property acquired after January 19, 2025, meaning you can write off the entire cost of qualifying assets in the first year.6Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One, Big, Beautiful Bill
Used together, these can let you deduct the full purchase price of qualifying tangible assets in the acquisition year, which is a serious cash-flow lever when you most need it.
How the Seller’s Entity Type Changes Your Options
What the seller is, legally, often decides whether you end up with an asset deal or a stock deal and at what price.
C Corporations
Buying a C corporation’s assets creates a double tax for the seller. The corporation pays tax on its gain at the 21% federal corporate rate, and shareholders then pay again at individual capital gains rates when the proceeds are distributed.7Office of the Law Revision Counsel. 26 U.S. Code 11 – Tax Imposed Sellers push hard for a stock sale to avoid that. If you want the asset-deal tax benefits anyway, expect to pay a premium or make other concessions.
S Corporations and LLCs
Pass-through entities don’t pay tax at the entity level, so an asset sale doesn’t trigger the double hit. Deal-structure negotiations are usually less contentious.
When the target is an S corporation and the parties want the legal simplicity of a stock sale with the tax effect of an asset purchase, a Section 338(h)(10) election bridges the gap. The transaction stays a stock purchase on paper but is treated as an asset acquisition for federal tax purposes, giving you a stepped-up basis in the company’s assets.8Office of the Law Revision Counsel. 26 U.S. Code 338 – Certain Stock Purchases Treated as Asset Acquisitions Both the buyer and the target file IRS Form 8023 to make it.9Internal Revenue Service. About Form 8023, Elections Under Section 338 for Corporations Making Qualified Stock Purchases
Buying all the membership interests of a multi-member LLC is generally treated as an asset purchase for federal tax purposes by default, so you often get the stepped-up basis without any special election.
Seller Financing and Interest Deductions
Many acquisitions have the seller carrying part of the purchase price. Under the installment method, a seller who receives at least one payment after the close of the tax year recognizes gain as payments come in rather than all at once.10Office of the Law Revision Counsel. 26 U.S. Code 453 – Installment Method Spreading the tax hit can make sellers more flexible on price.
For you, the full purchase price sets your basis in the acquired assets from day one, regardless of what you’ve paid. Depreciation and amortization start when assets are placed in service, not when payments end. The interest portion of each installment is a deductible business expense, separate from the principal.
Two limits are worth knowing. The installment method doesn’t apply to inventory or publicly traded securities.10Office of the Law Revision Counsel. 26 U.S. Code 453 – Installment Method And if you’re buying depreciable property from a related party, the seller may have to recognize all gain in the sale year, which can change the deal economics.
Bank debt comes with its own ceiling. Interest on business debt is generally deductible, but the deduction can’t exceed 30% of your adjusted taxable income plus any business interest income you earned. Interest you can’t use carries forward. This bites hardest on heavily leveraged deals where interest is large relative to early operating income. Businesses under the IRS gross receipts threshold for small businesses are exempt from the cap entirely.11Office of the Law Revision Counsel. 26 U.S. Code 163 – Interest
Inheriting the Seller’s Tax Problems
A stock purchase moves the whole legal entity to you, which means unpaid income taxes, payroll taxes, sales taxes, penalties, and interest all become yours. This is the largest non-obvious risk in a stock deal.
Asset purchases are safer but not clean. The IRS can pursue a buyer as a transferee when assets were acquired for less than fair and adequate consideration, which can come up in distressed sales or related-party deals.12Internal Revenue Service. Internal Revenue Manual 4.11.52 – Transferee Liability Cases Most states also have successor liability statutes that can reach a buyer for pre-acquisition taxes even in an asset deal, especially unpaid payroll and sales tax.
Federal tax liens compound the risk. A lien against the seller attaches to all business property, including receivables, and stays attached until paid or the statute of limitations runs.13Taxpayer Advocate Service. Liens Buy assets under a lien and your title isn’t clean. Search federal and state records before closing, and require the seller to resolve anything that surfaces.
Requesting a tax clearance certificate from each state taxing authority is one of the strongest buyer protections. Many states require a bulk sale notification before an asset transfer closes and issue the certificate after reviewing the seller’s compliance history. Without one, the state can hold you liable for the seller’s unpaid obligations. Timelines vary, but build in 10 to 45 business days before close.
Taking Over the Workforce
Buying a business usually means taking over employees, and that creates employment tax steps that produce penalties if missed.
You will often need a new Employer Identification Number. The IRS requires one whenever a business changes ownership or entity structure.14Internal Revenue Service. When to Get a New EIN In a stock sale where the legal entity survives, the existing EIN usually carries over; in an asset sale where you’re spinning up a new operating entity, a new number is required.
Federal unemployment tax needs attention in the transition year. If the seller already paid FUTA on wages before the sale, you can only count those wages toward your FUTA obligation if you qualify as a successor employer under IRS rules. Without successor status, you restart the FUTA wage base at zero for every retained employee and could effectively pay the tax twice on them for the year.15Internal Revenue Service. Topic No. 759, Form 940 – Employers Annual Federal Unemployment (FUTA) Tax Return
State unemployment experience ratings also transfer in most states when you acquire all or part of a business, but rules and application deadlines differ. Miss the transfer and you get a new-employer rate, which may be higher or lower than the seller’s. Manipulating acquisitions to engineer a lower rate is illegal and actively investigated.
Net Operating Losses You Might Acquire
A target with large accumulated net operating losses can look like a bonus. Two rules keep that bonus smaller than it appears.
Post-2017 NOLs can only offset up to 80% of taxable income in a given year, so a profitable business will always owe something regardless of carryforward balance.16Office of the Law Revision Counsel. 26 U.S. Code 172 – Net Operating Loss Deduction
When an ownership change occurs, Section 382 caps the annual use of the target’s pre-acquisition losses at the target’s equity value at the change multiplied by the IRS long-term tax-exempt rate.17Office of the Law Revision Counsel. 26 U.S. Code 382 – Limitation on Net Operating Loss Carryforwards and Certain Built-In Losses Following Ownership Change Buy a $5 million company at a 2% rate and you can use $100,000 of pre-change losses per year. Unused annual amounts carry forward; losses that expire first are gone.
In an asset deal, you generally don’t get the seller’s NOLs at all. They stay with the selling entity. Section 382 is mainly a stock-deal concern. Either way, don’t pay for NOLs without modeling what they’ll actually produce year by year under both limits.
State and Local Taxes at and After Closing
State and local taxes layer on top of everything above and can produce bills no one modeled.
State sales tax may apply to the transfer of tangible items like furniture, equipment, and vehicles. Bulk or casual sale exemptions exist in some states, but rules differ, and buyers are often held liable if the seller doesn’t remit. Real estate in the deal brings property transfer taxes from state and sometimes local governments.
After closing, the ongoing obligations become yours: state income or franchise taxes, local business license fees, and any industry-specific levies. In a stock purchase especially, you inherit the compliance history too, and anything the seller failed to pay can land on you. Review that history during due diligence rather than discovering it from a notice six months later.