Buying a Business? The Financial Due Diligence
Checklist Nobody Gives You

If you're buying a business in Montana — or anywhere else — the standard due diligence package the broker hands you is designed to get the deal done, not to protect you. Three years of tax returns, a P&L, and a handshake isn't due diligence. It's a starting point.

We've worked on acquisitions and financial reviewswhere the stated EBITDA was off by 40% once we normalized the numbers. We've found six-figure payroll tax liabilities that weren't in any disclosure document. And we've seen buyers in Kalispell and across the Flathead Valley close on businesses that looked profitable on paper and bleed cash from day one.

This is the financial due diligence checklist nobody gives you— the one that surfaces what's actually there before you sign.

The business brokerage industry is built around getting deals closed. That's not a criticism — it's just reality. Brokers are compensated on commission at close, which means the information package you receive is curated to present the business in its best light. The broker isn't lying; they're selling.

The problem is that most buyers — especially first-time buyers — don't know what's missing from that package. They see three years of tax returns showing consistent profit and assume the numbers are real. They aren't always. Owner add-backs, one-time revenues, related-party transactions, and aggressive accounting can make a $400,000 EBITDA business look like an $800,000 one on paper.

Financial due diligence is not an audit. An audit verifies that financial statements comply with accounting standards. Due diligence answers a different question: Is this business worth what the seller is asking, and what risks am I taking on if I buy it?

Real financial due diligence for a business acquisition covers five domains: the quality and sustainability of earnings, the accuracy of the balance sheet, the actual cash generation of the business, the tax exposure being inherited, and the operational infrastructure holding it together. Most buyers only look at the first one — and only on the surface.

The depth and cost of due diligence should scale with deal size. For a $500,000 acquisition, a thorough owner-led review with a fractional CFO assisting is often sufficient. For a $5M deal, you need a formal Quality of Earnings report from a third-party accounting firm. Either way, the framework is the same.

Every acquisition we advise on at 406 Consulting Group runs through the same five-pillar system. We call it the CLEAR Framework— because by the time you're done, there should be no ambiguity about what you're buying.

A Quality of Earnings (QofE) analysis is the single most important financial document in a business acquisition. As the AICPA emphasizes, a QofE report goes well beyond standard financial statement review — it normalizes earnings by removing non-recurring items, owner-specific benefits, and accounting choices that inflate the apparent profitability of the business.

The seller's broker will give you a "recast" EBITDA that adds back owner salary, depreciation, and a list of "one-time" expenses. Be skeptical. A real QofE looks at those add-backs critically — because sellers have every incentive to maximize them, and many of those "one-time" items happen every year.

Working capital requirements in an acquisitionare one of the most commonly misunderstood — and most expensive — surprises buyers face. Working capital is the cash the business needs to operate day-to-day: to pay suppliers before customers pay you, to cover payroll while waiting on receivables, to hold inventory that isn't yet sold.

In most acquisition agreements, there's a "working capital target" — an agreed-upon level of working capital that the seller must leave in the business at close. If the actual working capital at close is below the target, the seller owes the buyer the difference (a "working capital adjustment"). If it's above, the buyer owes the seller.

The problem: most buyers don't know what the right working capital target is. They accept the seller's proposed target without running the math themselves — and then spend the first 60–90 days of ownership scrambling to fund operations that the business can't self-fund at the purchase price paid.

Tax liabilities are the most common category of post-close surprise — and among the most expensive. In an asset purchase (the most common structure for small business acquisitions), many tax liabilities don't transfer. In a stock purchase or entity purchase, they all do. Even in an asset deal, some liabilities follow the business regardless of deal structure.

Montana has its own state tax landscape administered by the Montana Department of Revenue, and buyers acquiring businesses with any out-of-state revenue exposure also face sales tax nexus rulesthat the Tax Foundation notes are increasingly aggressive post-Wayfair. Here's what to look for:

Most buyers read the P&L. Fewer read the balance sheet. That's a mistake — because the balance sheet is where the bodies are buried. Aged receivables that will never be collected. Inventory that hasn't moved in two years. Related-party loans that the seller will want paid back at close. Equipment that's fully depreciated but still being counted as an asset at inflated book value.

EBITDA is a valuation metric. It is not a measure of how much cash the business puts in your pocket. Subtract debt service, required capital expenditures, and working capital needs from EBITDA, and you get something closer to actual free cash flow — which is what pays your salary and services the acquisition loan.

Two specific cash flow issues to investigate thoroughly in your business acquisition due diligence:

This is the due diligence category that doesn't show up in financial statements — and it's often the one that destroys the most value post-close. The question isn't whether the business is profitable. It's whether it can stay profitable once the seller walks out the door.

In many small businesses — especially in Montana trades and professional services — the owner is the business. They have the key customer relationships. They hold the licenses. They do the technical work. The "business" you're buying is really just their client list and their goodwill, which has a limited shelf life once they're gone.

Not everything the business owes is on the balance sheet. Equipment leases, software subscriptions, personal guarantees, environmental liabilities, and unfunded pension obligations are real financial obligations that don't always show up in the financials you're reviewing. A thorough buying a business checklist always includes a lien and obligation sweep.

Most deals have issues. The question is whether they're priceable or deal-killers. Here are the seven walk-away triggers we've seen in Montana acquisitions — problems serious enough that no price adjustment can adequately compensate for the risk.

You cannot do this alone — and you shouldn't try to. The cost of a proper due diligence team is 1–3% of the deal price. The cost of skipping it can be the entire deal. For Kalispell and Flathead Valley buyers, here's who you need and what each person does.

Frequently Asked Questions