Tax Implications of Selling a Business in Maine: What Sellers Need to Know Before Closing

Why Maine Business Sellers Face a Unique Tax Environment

Maine is one of a smaller group of states that imposes its own capital gains tax on top of federal obligations — and the rates are steep enough to meaningfully change what you take home from a sale. Before you accept a letter of intent or agree to a deal structure, understanding the full tax picture can easily save you five or six figures at the closing table. This guide walks through the federal and Maine-specific tax landscape for business sellers in plain terms, with the details you actually need to make informed decisions.

Federal Capital Gains Tax: The Starting Point

At the federal level, how your sale proceeds are taxed depends largely on how long you've owned the business and how the deal is structured. If you've owned the business for more than one year, most of the gain on the sale of appreciated assets qualifies for long-term capital gains treatment — currently taxed at 0%, 15%, or 20% depending on your taxable income. For most business sellers, the 15% or 20% rate applies.

However, not every dollar from a business sale receives that favorable rate. The IRS requires sellers to allocate the purchase price across asset classes using Form 8594 (Asset Acquisition Statement Under Section 1060). Assets like furniture, equipment, and vehicles may be subject to depreciation recapture, taxed as ordinary income at rates up to 37%. Goodwill — often the largest component of a small business sale — typically qualifies for long-term capital gains treatment if structured correctly. This is one reason deal structure matters enormously from a tax perspective.

Additionally, if your net investment income pushes your modified adjusted gross income above $200,000 (single) or $250,000 (married filing jointly), you'll also owe the 3.8% Net Investment Income Tax (NIIT) on your gain, bringing the effective federal ceiling to approximately 23.8% on long-term capital gains before Maine's tax is even calculated.

Maine State Income Tax on Business Sale Proceeds

Maine taxes capital gains as ordinary income. There is no preferential capital gains rate in Maine — your gain from the sale of a business is added to your other income and taxed at Maine's graduated income tax rates, which range from 5.8% to 7.15% under Maine Revised Statutes Title 36, Part 8. The top rate of 7.15% applies to taxable income above $58,050 for single filers and $116,100 for joint filers (2024 thresholds). For most business sellers, the entire gain will be taxed at 7.15% because the sale proceeds push them well into that bracket.

This means a Maine business seller could be looking at a combined marginal rate of roughly 30–31% (20% federal long-term capital gains + 7.15% Maine + 3.8% NIIT) on the capital gain portion of their sale. That's a meaningful number if you're selling a business for $500,000 or $2 million. On a $1 million gain, the combined state and federal tax burden could easily exceed $300,000 if no planning is done in advance.

Maine sellers file their state income tax return with the Maine Revenue Services (MRS), which operates under the Maine Department of Administrative and Financial Services. Business sale gains are reported on Maine Form 1040ME. If you received installment payments (see below), you report income as it's received each year, which can have meaningful implications for your tax bracket.

Asset Sales vs. Stock Sales: The Structure That Changes Everything

One of the most consequential decisions in any business sale is whether it's structured as an asset sale or a stock sale (or membership interest sale for LLCs). Each has different tax implications for both buyer and seller.

• Asset Sales: The buyer purchases individual assets — equipment, inventory, customer lists, goodwill, real estate leases, etc. This is preferred by most buyers because they get a stepped-up basis in the assets and can depreciate them going forward. For sellers, it's often less favorable because portions of the gain (like depreciation recapture on equipment under IRS Section 1245) are taxed as ordinary income rather than at capital gains rates.
• Stock Sales: The buyer purchases your ownership interest directly (shares of a corporation, or LLC membership interests). This is generally more favorable for sellers because the entire gain is typically treated as a capital gain. However, buyers often resist stock sales because they inherit all liabilities — known and unknown — along with the entity.
• S Corporations and LLCs: For pass-through entities, which are extremely common among Maine small businesses, there is no "stock" in the traditional sense for LLCs. An LLC sale is typically treated as an asset sale for federal tax purposes unless both parties elect otherwise under IRS rules.

In practice, most small business transactions in Maine are structured as asset sales. A skilled broker and CPA working together can sometimes negotiate a hybrid structure — for example, allocating more of the purchase price to goodwill (capital gains treatment) and less to equipment (ordinary income treatment) — which can shift thousands of dollars from your tax bill to your pocket.

Maine Withholding Requirements for Non-Resident Sellers

If you own a Maine business but are not a Maine resident at the time of sale, Maine has a specific withholding requirement worth knowing. Under Maine Revenue Services Rule 806 and associated statutes, buyers may be required to withhold a portion of the purchase price for non-resident sellers of Maine real estate. If your business sale includes Maine real property — a building, land, or commercial real estate — the buyer must withhold 2.5% of the total consideration paid to the seller at closing and remit it to Maine Revenue Services. This is not an additional tax; it's a prepayment of your Maine tax liability, credited against what you ultimately owe on your return.

Even if you've relocated out of state before selling, if the underlying business assets or real property are located in Maine, Maine will assert taxing jurisdiction over that portion of the gain. Maine follows a source-based income approach under Title 36 MRSA §5142, meaning income from Maine sources — including the sale of a Maine business — is taxable to Maine regardless of where you live when the sale closes.

Installment Sales: Spreading Out the Tax Burden

One powerful tool available to Maine business sellers is the installment sale under IRS Section 453. Rather than receiving the full purchase price at closing, you receive payments over time — often two to five years, sometimes longer — and only recognize income (and pay taxes) as you receive each payment. This can keep you in a lower Maine income tax bracket in each individual year, rather than being hit with a single massive gain in the year of sale.

For example, if you sell a business for $800,000 and structure it as a five-year installment sale, you might receive $160,000 per year. Depending on your other income, this could keep you out of the highest Maine bracket each year rather than pushing you well into it in a single year. Over five years, the tax savings can be significant — though you must weigh this against the risk that the buyer defaults on future payments.

Installment sales also affect your federal NIIT calculation and must be reported properly on IRS Form 6252 (Installment Sale Income) each year. Your accountant should model both scenarios — lump sum vs. installment — before you finalize the deal structure.

Qualified Opportunity Zones in Maine

Maine has 32 designated Qualified Opportunity Zones (QOZs), covering areas in cities like Lewiston, Bangor, Biddeford, and Rumford. If you sell your business and reinvest the capital gain into a Qualified Opportunity Fund within 180 days, you can defer and potentially reduce your federal capital gains tax. Gains held in a QOZ fund for at least 10 years may be entirely excluded from federal capital gains tax on the appreciation. Maine generally conforms to federal QOZ treatment, though you should confirm with a Maine tax advisor since state conformity rules can shift.

Entity Type Matters: C Corps Face Double Taxation

If your Maine business is structured as a C Corporation, the tax picture is significantly more complicated. When a C Corp sells its assets, the corporation pays corporate income tax on the gain (federal corporate rate is currently 21%, and Maine imposes a corporate income tax ranging from 3.5% to 8.93% under Title 36 MRSA §5200-A). Then, when the remaining after-tax proceeds are distributed to shareholders as a dividend, those dividends are taxed again at the individual level — the classic "double taxation" problem.

For C Corp sellers, a stock sale is strongly preferable from a tax standpoint, but getting buyers to agree often requires negotiating a lower price or other concessions. Alternatively, a Section 338(h)(10) election can allow an asset sale to be treated as a stock sale for tax purposes when both buyer and seller agree — a nuanced option that requires careful planning well before closing.

Practical Steps Maine Business Sellers Should Take Now

• Engage a Maine CPA before you list. Tax planning done six to twelve months before the sale gives you options. Tax planning done after the deal closes gives you almost none. Look for a CPA familiar with Maine Revenue Services audit practices and business transaction taxation.
• Get a business valuation. Understanding what your business is worth helps you model tax scenarios accurately. A broker can provide a realistic estimate of value and typical deal structures in your industry.
• Review your entity structure. If you're a C Corp, converting to an S Corp at least five years before a planned sale can eliminate double taxation — but the five-year "built-in gains" period under IRS Section 1374 must pass first.
• Model installment vs. lump sum with your accountant. The right answer depends on your other income, your confidence in the buyer, and your post-sale financial plans.
• Consult a Maine business attorney. The Maine Bar Association's referral service can connect you with attorneys experienced in M&A transactions who understand how Maine courts and Maine Revenue Services handle disputes.

Working With a Broker Who Understands Maine's Market

Tax strategy and deal structure don't exist in a vacuum — they depend on how your business is valued and how the sale is negotiated. Barrett Henry of buythe.biz connects Maine business sellers with experienced, licensed local business brokers through a nationwide referral network. These brokers understand Maine's regional economy — from the seasonal nature of tourism-dependent businesses in York County and the Midcoast, to the manufacturing and paper industry legacy in Aroostook and Franklin counties, to the healthcare and university-driven stability in the Portland-South Portland metro area. Getting the deal structured right from the start is how you protect the most value.