How to Write Off Goodwill for Tax Purposes When Buying a Business

When you're buying a small business, goodwill often represents the largest intangible asset on the balance sheet. It's that premium you pay above the tangible assets—the brand reputation, customer relationships, and market position that make the business worth more than its equipment and inventory combined. For most buyers in the entrepreneurship through acquisition (ETA) community, understanding how to write off goodwill for tax purposes can save tens of thousands of dollars over the life of your investment.

The good news: business goodwill remains amortizable under Section 197 of the Internal Revenue Code, and this treatment continues into 2026 and beyond. Unlike personal charitable donations to organizations like Goodwill Industries (which face new restrictions starting in 2026), business goodwill purchased in an acquisition follows a straightforward 15-year amortization schedule that hasn't changed.

The Mechanics of Writing Off Goodwill

When you acquire a business, the purchase price gets allocated across various assets—equipment, inventory, real estate, and intangible assets like goodwill. Section 197 of the tax code allows you to amortize that goodwill portion in equal installments over exactly 15 years, regardless of the actual useful life of the asset.

Here's the formula:

Annual Goodwill Deduction = Total Goodwill Amount ÷ 15 years

Monthly Deduction = Annual Deduction ÷ 12

So if you purchase a business for $1.5 million and $600,000 is allocated to goodwill, you can deduct $40,000 per year ($600,000 ÷ 15) for the next 15 years. That's $3,333 per month coming off your taxable income.

The amortization begins in the month you acquire the business. If you close on July 15th, you get six months of deductions that first year. The deduction appears on Form 4562 (Depreciation and Amortization) and flows through to your business return, whether that's a Schedule C, partnership return, or S-corp.

What qualifies under Section 197? Beyond goodwill, you can amortize going-concern value, workforce in place, business books and records, patents, copyrights, customer lists, supplier relationships, licenses, permits, franchises, trademarks, and trade names. Essentially, if it's an intangible asset acquired as part of a business purchase, it probably gets the 15-year treatment.

Why This Matters More Than You Think

Most first-time buyers fixate on the purchase price and financing terms but overlook the asset allocation buried in the purchase agreement. That's a mistake. How you allocate the purchase price between tangible assets, Section 197 intangibles, and goodwill directly impacts your tax bill for the next decade and a half.

Sellers typically want more allocated to goodwill because it's taxed at favorable capital gains rates. Buyers often want more allocated to shorter-lived assets like equipment (which can be depreciated faster) or inventory (which is deductible when sold). The allocation you agree to gets reported on IRS Form 8594 (Asset Acquisition Statement), and both parties must use consistent numbers.

Here's where it gets strategic: while you can't accelerate goodwill amortization through bonus depreciation or Section 179 expensing, the predictable 15-year schedule means you can model your tax savings accurately from day one. For a buyer using SBA financing on a $2 million deal with $800,000 in goodwill, that's $53,333 in annual deductions—potentially worth $15,000+ in tax savings each year depending on your bracket.

What Hasn't Changed (And Won't)

It's worth noting what this article is not about. There are significant tax changes coming in 2026 for personal charitable contributions—including donations to Goodwill thrift stores and other nonprofits. Starting in 2026, itemizers will face a 0.5% AGI floor on charitable deductions, and non-itemizers can claim up to $1,000 for single filers or $2,000 for joint filers as an above-the-line deduction for cash gifts to public charities.

But those changes have nothing to do with business goodwill. The Section 197 rules that govern writing off goodwill for tax purposes in business acquisitions remain stable. No sunset provisions. No new limitations. The mechanics are the same in 2026 as they were in 2016.

That stability matters. One of the few predictable elements in small business M&A taxation is that your goodwill amortization will march along at 1/180th per month for 15 years. Plan accordingly. Model it into your projections. Use it as a selling point when pitching lenders on your debt service coverage.

The real leverage comes from getting the asset allocation right at closing. Work with a CPA who understands business acquisitions—not just compliance work—to structure the purchase agreement in a way that maximizes your deductions while staying defensible under IRS scrutiny. The goodwill number isn't arbitrary; it should reflect fair market value and be supported by a proper valuation if you're ever audited.

For small business buyers, writing off goodwill isn't just a line item on your tax return. It's a 15-year annuity of deductions that can meaningfully improve your cash-on-cash returns and make a marginal deal pencil out. That's worth understanding deeply before you sign on the dotted line.

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