The seller's profit-and-loss statement says the business earned $800,000 last year. The asking price is four times that number. And the lender's independent review, finished three weeks into your due diligence, says the real, repeatable earnings are closer to $520,000. Nothing was forged and nobody lied exactly — the gap is owner add-backs, one-time windfalls, and accounting choices that flatter the past and say nothing about your future. That gap is where buyers overpay by six figures, and it is exactly what due diligence exists to close.
Buying an existing business skips the hardest part of starting one: you get revenue, customers, staff, and systems on day one. But you also inherit everything the seller would rather you not price in — stale receivables, customer concentration, deferred maintenance, tax exposure, and earnings that depend on the owner working seventy-hour weeks for a below-market salary. This guide walks through the financial core of a buyer-side checklist: how to verify the numbers, what a quality of earnings report actually tests, how the working capital peg protects your purchase price, and what the SBA now requires when you finance the deal with a 7(a) loan.
Start With the Triangle: Books, Tax Returns, and Bank Statements
Every financial review starts by reconciling three versions of the same story. The internal books (profit-and-loss statements and balance sheets, ideally monthly for three years) show what management believes happened. The business tax returns for the same years show what was reported to the IRS. The bank statements show what cash actually moved. In a clean business, all three agree within small, explainable differences. In a business with problems, they diverge — and the direction of the divergence tells you what kind of problem you have.
Revenue on the books that never hit the bank account may be uncollected receivables, aggressive recognition, or sales that exist mostly on paper. Cash deposits that never appear as revenue may be owner loans run through the business, or income the seller preferred the IRS not see — either way, you cannot borrow against earnings the tax returns do not support, and your lender will use the lower number. Expenses that appear on tax returns but not in management reports often mean the seller kept two sets of awareness: one for minimizing tax, one for maximizing price.
Ask for monthly statements rather than annual summaries. Annual numbers hide seasonality, hide the margin collapse in the last two quarters, and hide the single enormous December invoice that made the whole year. Then tie the story together: revenue minus the change in receivables should roughly equal cash collected from customers, and cost of goods sold plus the change in inventory should roughly equal cash paid to suppliers. When those bridges do not foot, you have found the first questions for the seller — before you have spent a dollar on outside help.
Quality of Earnings: What the Number Is Really Made Of
A quality of earnings (QoE) report is an independent analysis of whether the seller's earnings are real, repeatable, and correctly measured. It is not an audit — nobody is opining that the financials comply with accounting standards — and it is not a valuation. It answers a narrower, more practical question: if you owned this business and ran it normally, what would it earn in a typical year?
The centerpiece is adjusted EBITDA: earnings before interest, taxes, depreciation, and amortization, normalized for everything that will not repeat under your ownership. The seller's version of this number almost always needs challenging, because every dollar of adjustment flows straight into the price at whatever multiple you are paying. At a 4x multiple, a $50,000 add-back the seller talks you into accepting costs you $200,000.
The add-backs to scrutinize
Legitimate adjustments exist — the seller's above-market salary, personal expenses run through the business, rent paid to the seller's own property company at off-market rates, and genuinely one-time costs like a lawsuit settlement or a flood repair. Each one should come with documentation and a clear reason it disappears after closing. The adjustments that deserve skepticism follow familiar patterns:
- Owner compensation normalization. If the seller paid themselves $40,000 while working full-time as the general manager, replacing them costs far more than $40,000. Normalize to the market cost of a replacement, not to zero.
- One-time expenses that recur. A business that books "non-recurring" legal fees, recruiting costs, or equipment repairs every single year has recurring expenses with creative labels. Ask for three years of detail, not one.
- Revenue that will not survive the sale. Sales to the seller's other companies, a single contract up for renewal, grant income, pandemic-era windfalls, and revenue booked before it was earned all inflate the run rate you are paying for.
- Deferred spending. A seller who stopped maintaining equipment, cut advertising to zero, and let staffing run skeleton-thin for eighteen months before listing has borrowed earnings from your future. The QoE should quantify the catch-up cost.
- Working capital games. Collecting receivables aggressively while stretching payables to ninety days flatters cash flow right up to the measurement date. This is why earnings quality and working capital analysis travel together.
A good QoE also examines revenue recognition policies, customer concentration, backlog quality, inventory obsolescence, and the autobahn between reported profit and operating cash flow: over several years, cumulative earnings and cumulative cash from operations should track each other. When profit compounds and cash does not, the earnings are low quality whatever the P&L claims.
The SBA now requires one on larger deals
Since October 1, 2026, under SOP 50 10 8.1, an SBA 7(a) loan for a change of ownership with a purchase price of $3 million or more requires a lender-ordered quality of earnings report — and that report must include a cash proof tying the seller's bank activity to the books and the tax returns. Below that threshold the report is optional but increasingly expected: many 7(a) lenders now order a QoE or a lighter agreed-upon-procedures review on smaller acquisitions too, because the same add-back disputes that kill big deals kill small ones. If you are buying below $3 million without a QoE, you are doing the lender's skepticism yourself, with the checklist in this guide.
The Working Capital Peg: Protecting the Price After You Agree It
You negotiate a price based on months-old financials, then close weeks or months later. In between, the seller still controls the checkbook — and has every incentive to collect every receivable, delay every payable, and draw the accounts down to the studs before handing you the keys. The working capital peg exists to stop that quiet value transfer.
Here is how it works. The purchase agreement defines a target level of net working capital — typically current assets minus current liabilities, with a carefully negotiated definition that usually excludes cash, debt, and tax balances — based on the business's historical average, often a twelve-month trailing average. At closing, the seller delivers an estimate of actual working capital. After closing, usually within 30 to 120 days, the buyer measures the actual number. If working capital comes in below the peg, the seller refunds the shortfall dollar for dollar, usually out of an escrow holdback funded at closing; if it comes in above, the buyer pays the excess. Many deals add a collar, a small band around the target inside which no adjustment changes hands, so neither side fights over rounding.
Three details decide whether the mechanism actually protects you. First, the definition: spell out exactly which accounts count, how receivables are aged and reserved, how inventory is valued and what happens to obsolete stock, and which accounting policies apply — the seller's historical policies or GAAP. Vague definitions are the most litigated part of small-business purchase agreements. Second, the peg level: a twelve-month average can be too generous if the business is seasonal or shrinking, so test the target against the month you are actually closing in. Third, the escrow: a true-up right without escrowed funds is a collection project against a seller who has already been paid and moved on. Fund the holdback at closing, sized to a realistic shortfall, not a symbolic one.
What the SBA Requires When You Finance the Purchase
Most small-business acquisitions use an SBA 7(a) loan, and the program treats a purchase as a change-of-ownership transaction with its own rulebook. The October 2026 rule update tightened several of these rules, so confirm the current SOP with your lender rather than relying on a blog post from the old regime — including, eventually, this one.
- Equity injection: 10 percent, and your half must be real. A complete change of ownership requires the buyer to inject at least 10 percent of total project costs — purchase price plus closing costs, fees, and financed working capital, not just the loan amount. A seller note on full standby for the life of the loan can cover up to half of that requirement, leaving as little as 5 percent in buyer cash. Investor money counts under similar limits. Borrowed funds can qualify only if repayment comes from outside the business being acquired.
- Debt service coverage of 1.25 on real earnings. For an initial acquisition, the business must now show historical cash flow covering 1.25 dollars of debt service for every dollar of payments — up from the old 1.15 floor — and lenders generally can no longer count projected cash flow to get there. The earnings that qualify are the verified, historical kind this guide is about producing.
- Independent valuation on every deal. The revised rules eliminated the old threshold that let lenders value small acquisitions themselves: every 7(a) change of ownership now needs an independent valuation from a qualified source, regardless of size.
- Full ownership transfer. A 7(a)-financed acquisition must result in the buyer owning 100 percent of the business. Partial buy-ins and gradual transitions need different structures.
- The business must be sound and the buyer qualified. Lenders underwrite your management experience, your credit, and collateral alongside the company's cash flow. Industry experience in the business you are buying materially improves approval odds; absentee ownership of an unfamiliar trade is the profile lenders decline first.
Start the lender conversation before you sign a letter of intent, not after. A lender who blesses the structure, the equity sources, and the valuation approach early can still say no late — but a lender who first sees the deal at the purchase-agreement stage says no on timing alone.
The Rest of the Checklist: Beyond the Numbers
Financial diligence catches the fastest deal-killers, which is why it comes first. The remaining workstreams each get a line on the checklist and a named owner, because unassigned diligence does not happen.
Customers and revenue. Who are the top ten customers, what share of revenue does each represent, and what do the contracts say about assignment on a change of ownership? A business where one customer represents 40 percent of sales and can terminate on thirty days' notice is a different asset than its revenue line suggests. Review concentration, churn, backlog, pipeline, and pricing power — then call the largest customers after signing appropriate protections, because contracts describe rights and customers describe intentions.
Contracts and legal. Read every material agreement: customer and supplier contracts, the commercial lease (term, renewal options, personal guarantee, assignment clause), loan documents, licenses and permits, franchise agreements, and any litigation or threatened claims. Confirm the seller actually owns what is being sold — entity standing, asset titles, intellectual property assignments from founders and contractors — and check for liens, UCC filings, and tax warrants that survive the sale if you buy assets the wrong way.
Tax. Review three to five years of income, sales, payroll, and property tax filings plus any audit history. Unpaid payroll tax is the liability buyers fear most, because trust-fund penalties can follow responsible persons personally. In an asset purchase, get state tax clearance certificates where available so a predecessor's sales tax debt does not become yours through successor liability. Structure (asset vs. stock purchase) is a tax decision with seven-figure consequences — get a CPA involved before the LOI locks it in.
People and operations. Identify the key employees, what they are paid versus market, whether non-competes or non-solicits exist and are enforceable in your state, and what the seller's transition commitment looks like in writing. Map the systems: accounting software, point of sale, inventory, payroll, and who actually knows how each one works. If the answer to every operational question is the seller's first name, your transition plan is a single point of failure with a forwarding address.
Facilities and assets. Walk every location. Verify major equipment exists, works, and is owned rather than leased — then confirm maintenance records support the condition you are paying for. Environmental issues deserve their own review for industrial sites, gas stations, dry cleaners, and anywhere with underground tanks: cleanup liability dwarfs most other diligence findings when it appears.
Mistakes That Cost Buyers the Most
The same errors repeat across deals of every size. Accepting the seller's adjusted EBITDA without an independent QoE or equivalent scrutiny turns every aggressive add-back into purchase price at full multiple. Skipping the working capital mechanism — or agreeing to a one-sided version with no escrow — pays the seller twice for cash they already extracted. Treating tax returns as a formality misses the payroll exposure and successor liability that survive closing. Diligencing the business but not the lease leaves you owning profitable operations in a building you must vacate in eleven months. And financing assumptions kill more deals late than any finding: buyers who assume SBA approval, assume their equity sources qualify, or assume projections count discover otherwise weeks before closing, when the deposit is already at risk.
Pace the work to match: financeability and earnings quality first, because they answer whether there is a deal at all; legal, tax, and operational depth second, because they answer what the deal is worth and how to document it.
Keep Your Acquisition Books Clean From Day One
The discipline that protects you as a buyer becomes the discipline that protects you as an owner. Opening-day balance sheet, purchase price allocation, new depreciation schedules, loan amortization, escrow tracking, and the first post-close working capital true-up all land in your first month of ownership — and the buyers who struggle are the ones whose recordkeeping starts as a shoebox of closing documents. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and run your newly acquired business on books a future buyer's QoE will have nothing to unwind.
