Asset deals don’t protect you from everything. Here are the four tax liabilities that follow the business, not the seller — and the $200 step that prevents each one.
You structured the deal as an asset purchase specifically to avoid inheriting the seller’s liabilities. Your attorney told you asset deals are cleaner. Your SBA lender preferred it. You felt protected.
Then, fourteen months after closing, a letter arrives from the state Department of Revenue. The seller didn’t remit $47,000 in sales tax on equipment installations between 2023 and 2025. Under your state’s bulk sale successor liability statute, you — the current owner of the business assets — owe every penny of it.
Your purchase agreement says the seller is responsible for pre-close taxes. The state doesn’t care what your purchase agreement says. The state cares that you bought the assets, you’re running the business, and the tax is unpaid.
This is the successor tax trap, and it catches first-time HVAC buyers more often than anyone in the deal wants to admit.
The Four Tax Liabilities That Survive an Asset Sale
1. State Sales and Use Tax: The Most Common Trap
HVAC companies collect sales tax on equipment installations in most states. The rates, rules, and exemptions vary wildly — some states tax the full installed price, some tax only the equipment, some exempt repair labor but tax installation labor.
What doesn’t vary: most states impose strict successor liability on asset purchasers for the seller’s unpaid sales tax.
Here’s how it works: You buy the company’s assets (equipment, vehicles, customer list, goodwill). The state views this as a “bulk sale” — a transfer of substantially all business assets. Under bulk sale tax statutes, the buyer is personally liable for the seller’s unpaid sales tax up to the fair market value of the assets purchased.
The protection: Request a tax clearance certificate (also called a “letter of good standing” or “bulk sale clearance”) from the state tax authority before closing. This costs $0–$50 and takes 2–4 weeks. The certificate confirms the seller has no outstanding tax obligations — or identifies exactly what’s owed so you can escrow that amount from the purchase price.
Why most HVAC buyers skip it: Their attorney didn’t mention it. Their broker didn’t mention it. The SBA lender doesn’t require it. And the seller said “my taxes are current.” The seller’s word is not a tax clearance certificate.
States with explicit bulk sale successor liability provisions include California, New York, Texas, Florida, Ohio, Illinois, and at least 15 others. If your target operates in any of these states — and most do — this step is non-negotiable.
2. The IRS Trust Fund Recovery Penalty: The One That Gets Personal
When an employer withholds federal income tax and FICA from employee paychecks, that money is held “in trust” for the government. If the employer fails to remit it, the IRS can assess the Trust Fund Recovery Penalty (TFRP) under 26 U.S.C. § 6672 against any “responsible person” who willfully failed to collect, account for, or pay over the trust fund taxes.
Who is a “responsible person”? Anyone with authority to decide which creditors get paid. The seller, obviously. But post-close, the buyer who takes over the business, controls the bank accounts, and directs payroll may also qualify — especially if the same employees remain on payroll and the same payroll processing continues.
The scenario that kills you: The seller was behind on payroll tax deposits for the last two quarters before the sale. He used the cash for equipment repairs and figured he’d catch up after closing. He didn’t disclose it. The IRS doesn’t discover the shortfall for 12 months — by which time the seller has spent the sale proceeds. The IRS assesses the TFRP against the seller (who can’t pay) and then looks at you — the current “responsible person” running the same business with the same employees.
The protection:
- Request IRS Form 4506-C (transcript of the seller’s business tax returns) for the last 3 years. Compare the reported payroll taxes against actual W-2s and payroll records.
- Request copies of the last 4 quarters of Form 941 (Employer’s Quarterly Federal Tax Return) and verify deposits match the reported amounts.
- Include a specific tax indemnification clause in the purchase agreement that survives closing and covers trust fund taxes explicitly.
- In an asset deal, set up a completely new EIN and payroll system — don’t continue the seller’s payroll tax accounts under any circumstances.
3. Bulk Sale Notification: The Requirement Nobody Tells You About
At least 20 states require the buyer of business assets to notify the state tax authority before the sale closes. The purpose: give the state a chance to assert any tax claims against the seller’s assets before they transfer to a new owner.
If you skip the notification:
- You become liable for the seller’s tax debts up to the value of the assets you purchased
- The state can assess tax, penalties, and interest against you directly
- Your purchase agreement’s indemnification clause doesn’t protect you — successor liability is imposed by statute, not contract
The notification requirements vary by state. Some require 10 days’ notice before closing. Some require 20 or 30 days. Some require the buyer to withhold a portion of the purchase price until the state confirms no taxes are owed.
The protection: Have your attorney check your state’s bulk sale tax notification requirements and file the notice as soon as the purchase agreement is signed. This costs nothing but time — and the cost of NOT doing it is the seller’s entire unpaid tax bill.
4. The Seller’s Return Problem: Underreported Income and Amended Returns
HVAC company owners who’ve been running personal expenses through the business for 15 years have a tax problem they may not even recognize. They underreported income to reduce taxes — and now, during the sale process, they’re “adding back” those personal expenses to inflate SDE for a higher purchase price.
Those add-backs are a confession. If the seller claims $50,000 in personal expenses were run through the business (truck for the wife, family cell phone plans, home office deductions for a fully commercial business), those add-backs imply the tax returns underreported income by $50,000/year. For three years, that’s $150,000 in underreported income — and the IRS statute of limitations on a substantially understated return is 6 years, not 3. This is exactly the kind of discrepancy that shows up during QuickBooks forensics — where the add-back schedule tells one story and the filed returns tell another.
Why this becomes the buyer’s problem:
- If the IRS audits the seller and assesses additional taxes, the IRS can file a federal tax lien that attaches to “all property and rights to property” — including business assets you now own, if the lien arose before the sale date
- In a stock deal, the liability is automatic — you bought the entity, you bought the tax problem
- Even in an asset deal, if the seller can’t pay, the IRS may pursue fraudulent transfer claims if the sale price was below fair market value
The protection:
- Have your CPA review the seller’s tax returns alongside the add-back schedule. If the add-backs imply substantial underreporting, discuss the exposure with your attorney before closing.
- Include a tax representation and warranty in the purchase agreement: the seller represents that all tax returns are accurate, all taxes have been paid, and there are no pending or threatened audits.
- Require the seller to file amended returns correcting any underreporting before closing. This starts the statute of limitations clock on the corrected amounts and creates a clean baseline.
The Tax Clearance Checklist: 30 Minutes That Save You $50,000+
Before closing any HVAC acquisition, complete this checklist:
- State sales/use tax clearance certificate — Request from state Department of Revenue. Timeline: 2–4 weeks. Cost: $0–$50.
- State bulk sale notification — File with state tax authority per your state’s requirements. Timeline: 10–30 days before closing.
- IRS business tax transcript (Form 4506-C) — Request transcripts of the seller’s business returns for 3 years. Timeline: 5–10 business days. Cost: free.
- Form 941 verification — Compare the seller’s quarterly payroll tax returns against actual payroll records and bank deposit records.
- State income/franchise tax clearance — Some states issue separate clearance for income taxes. Check your state.
- State unemployment tax clearance — Verify the seller’s SUTA account is current. Delinquent accounts affect your new SUTA rate.
- Local business tax/license clearance — Municipal and county business taxes are often overlooked. Verify with local tax authority.
Total cost for all seven items: under $200 and a few hours of your CPA’s time.
Total cost of skipping them: potentially the entire seller’s unpaid tax bill — which you won’t discover until 12–18 months after you’ve already signed the check.
Purchase Agreement Language That Actually Protects You
Standard purchase agreements include general tax representations. They’re not enough. Insist on:
- Specific tax indemnification that survives closing for the full statute of limitations period (3–6 years depending on the tax type)
- Holdback or escrow of 5–10% of purchase price for 24 months, accessible for tax claims
- Seller’s obligation to cooperate with any post-close tax audit or inquiry related to pre-close periods
- Representation that all tax returns are accurate and no amendments are planned
- Bulk sale compliance confirmation — buyer and seller jointly confirm that all required notifications have been made
Your attorney may push back on some of these as “unusual for deals this size.” Unusual is not the same as unnecessary. A $50,000 tax assessment doesn’t care how big your deal was.
The Real Risk: The Seller Who Doesn’t Know
The most dangerous seller isn’t the one hiding tax problems. It’s the one who genuinely doesn’t know they have any.
A seller who’s been collecting sales tax on installations but depositing it into the operating account — and spending it — doesn’t think of that as “unpaid taxes.” He thinks of it as “cash flow.” His bookkeeper may have filed returns showing the correct tax collected but the deposit records show it was never remitted. The state has a valid claim. The seller doesn’t know it exists. And without a clearance certificate, neither will you.
The HVAC industry runs on trust, handshakes, and “my CPA handles it.” That’s fine when you’re running the business. It’s not fine when you’re buying one. Verify everything. Request clearances. Read the returns. And don’t close until the tax picture is clean — or until you’ve priced the dirty parts into the deal. If something feels off, treat it like any other red flag — investigate before you commit.
Navigating the tax complexity of an HVAC acquisition? Lendesca helps buyers understand the full financial picture of acquiring a service business — including the liabilities that don’t show up on the seller’s P&L.
Tax successor liability is one of many hidden financial risks in HVAC acquisitions. The workers’ comp audit guide covers a related post-close surprise, and the asset sale vs. stock purchase guide explains how deal structure affects which liabilities transfer. For the full SBA deal structure picture, see how dual seller notes interact with acquisition financing.
