Financial Metrics for Assessing Acquisitions: The Numbers That Actually Tell You If a Deal Works

Financial metrics for assessing acquisitions are the ratios and figures a buyer runs on a target’s trailing financials to decide whether the business can be bought, financed, and paid back. The core set is Adjusted EBITDA, EBITDA multiple, revenue growth, gross margin, customer concentration, working capital, free cash flow, and Debt Service Coverage Ratio (DSCR). Run those eight in order and you’ll know in under an hour whether a deal is real, mispriced, or dead. Every other metric is a supporting detail.

Look, I’ve done 300+ deals over 30 years. The mistake I see new dealmakers make is running 40 metrics on the first look. That’s how you talk yourself into a bad deal and out of a good one. What actually works is a short, ordered checklist — the same eight numbers every time, in the same sequence, with the same thresholds. If a target fails on any of them, you either restructure the offer or walk. You don’t spend another Saturday building a spreadsheet.

Here’s the exact checklist we run inside Dealmaker Academy and the thresholds I use on my own deals.

Adjusted EBITDA: The Number Everything Else Rests On

Adjusted EBITDA is the target’s earnings before interest, taxes, depreciation, and amortization, normalized for owner-specific expenses (personal vehicles, family salaries, one-time legal fees) and non-recurring items. It’s the number the deal is priced on. Get Adjusted EBITDA wrong and every downstream metric — multiple, DSCR, valuation — is wrong. Reconciling Adjusted EBITDA against tax returns and bank statements is the single highest-leverage hour in the whole assessment.

The seller (or their broker) will hand you an EBITDA number. Assume it’s optimistic. Your job is to rebuild it from the tax returns and see what actually shakes out.

1. Start with the tax return. Net income from Form 1120 or Schedule C is the honest starting point — owners rarely overstate what they pay tax on.
2. Add back interest, taxes, depreciation, and amortization. These are on the return. Straightforward.
3. Add back real owner adjustments. Owner salary above market, personal vehicle, health insurance, spouse-on-payroll, one-time legal or consulting fees. Every add-back needs a document behind it — a payroll register, a receipt, a signed engagement letter.
4. Reject phantom add-backs. “Marketing we didn’t do,” “a bad year for the industry,” “a lawsuit that will never happen again.” These aren’t add-backs. They’re the seller telling you a story. Cross them out.

A clean Adjusted EBITDA usually lands 5-15% below what the CIM claimed. That gap is the first negotiation your diligence buys you. For the full walkthrough on rebuilding the number, see our financial-analysis training.

EBITDA Multiple: Are You Paying a Fair Price?

The EBITDA multiple is the purchase price divided by Adjusted EBITDA — the single most-used valuation metric in lower-middle-market M&A. Typical ranges: 2-4x for owner-operated main-street businesses under $1M EBITDA, 4-6x for professionalized lower-middle-market ($1-5M EBITDA), 6-9x for institutionalized businesses with recurring revenue, management teams, and clean data rooms. Sellers price at the top of the range. Buyers close at the middle or bottom.

The multiple isn’t a number you invent — it’s a number the market sets by sector, size, and quality. Three factors decide where inside the range a specific deal actually trades:

• Size premium. Bigger EBITDA earns a higher multiple because the buyer pool is larger — PE, strategics, family offices all compete for $5M+ EBITDA targets. Under $1M EBITDA, you’re competing with owner-operators and the multiple compresses.
• Quality of earnings. Recurring revenue trades higher than transactional. Diversified customers trade higher than concentrated. Long-tenured team trades higher than founder-dependent.
• Growth. A business growing 15% a year trades at a materially higher multiple than a flat one. Compounding earnings compound the multiple too.

Run the multiple both ways: what the seller is asking (implied multiple = asking price / your rebuilt EBITDA) and what you’d pay (target multiple x your rebuilt EBITDA). The gap between those two is either your negotiation range or the reason you walk.

Revenue Growth Rate and Gross Margin: Is the Business Actually Healthy?

Revenue growth rate is the year-over-year change in top-line revenue over the last three fiscal years. Gross margin is revenue minus cost of goods sold, expressed as a percentage. Together they tell you whether the business is growing, stable, or dying, and whether it makes real money on what it sells. Any target with declining revenue and compressing gross margin should be priced as a distressed asset, not a going concern.

What to look at:

• 3-year revenue CAGR. Compound annual growth rate over the trailing three years. Above 10% is a growth story. 0-10% is stable. Negative is a red flag that must be explained, priced in, or walked from.
• Gross margin stability. A flat or expanding gross margin means pricing power. A compressing margin means the business is losing to competitors, input costs, or discounting to hold volume. Compressing margin plus flat revenue is a business in slow decline.
• Revenue mix shift. Ask which product lines or customer segments drove growth. Growth from one hero product line is fragile. Growth spread across the mix is durable.

These two together sit right after Adjusted EBITDA in importance. A business with strong EBITDA but flat revenue and shrinking margin is a business that will look very different in 24 months than the seller is telling you.

Customer Concentration: The Metric That Kills the Most Deals

Customer concentration is the percentage of revenue attributable to the top customer, top three customers, and top ten customers. It’s the single most common reason otherwise good deals die in diligence. The threshold I use: any single customer above 25% of revenue is a serious risk, above 40% is a walk-away trigger unless there’s a multi-year contract with a substantial termination penalty.

Concentration is a hidden cost of capital — lenders discount the deal, buyers discount the deal, and one customer conversation can wipe out a year of EBITDA. What to pull:

1. Top 10 customers by revenue for the last 3 years. Sorted, with contract length and renewal date next to each. Look for churn masked by growth.
2. Contracts on the top 3. Are they written, multi-year, with auto-renewal and termination penalties? Or is this all handshake business?
3. Relationship owner. If the seller personally owns the top-customer relationship, that’s founder-dependency risk stacked on top of concentration risk.

Deals with heavy concentration aren’t automatically dead — they’re just repriced. Bigger holdback, longer earnout, tighter reps, lower multiple. Structure the concentration into the deal or walk.

Working Capital: The Metric That Quietly Costs Buyers Six Figures

Working capital is current assets minus current liabilities — the operating cash the business needs to keep running between paying vendors and collecting from customers. In an acquisition, the negotiated “working capital peg” is the amount the seller must leave on the closing balance sheet. Set it too low and the seller strips cash before close, leaving you to fund payroll out of pocket from day one. This metric quietly costs buyers more money than any other line in the SPA.

Two numbers you need:

• Historical average working capital. The 12-month trailing average from the balance sheets. This is what the peg should be based on — not the number the seller happens to have on the shelf at close.
• Working capital days. Days sales outstanding (DSO) plus days inventory outstanding (DIO) minus days payables outstanding (DPO). Rising working capital days across three years signals the business is quietly financing growth off supplier credit or customer float — both fragile.

Get the peg written into the LOI, not the SPA. By the time you’re negotiating the SPA, the seller has anchored on “whatever’s on the balance sheet at close” and repricing gets ugly.

Free Cash Flow and DSCR: Can the Deal Pay for Itself?

Free Cash Flow (FCF) is Adjusted EBITDA minus maintenance capital expenditures, cash taxes, and required working capital investment. Debt Service Coverage Ratio (DSCR) is FCF divided by annual debt service (principal plus interest). A DSCR of 1.5x or higher at the asking price means the deal services its debt with a real cushion. Under 1.5x, either restructure the offer, extend the amortization, or walk. This is the metric your SBA lender or bank will price the deal on — so you may as well price it that way too.

The math dealmakers skip:

1. Estimate maintenance capex. Not growth capex. The dollars required just to keep the current run-rate intact — truck replacement, equipment refresh, software renewals. Ask the seller for the last 3 years of capex, then classify each item as maintenance or growth.
2. Compute cash taxes on the pro-forma structure. An asset deal generates a step-up in basis and shelters cash in early years. A stock deal doesn’t. This changes FCF by 10-25% — material.
3. Model the debt stack. SBA 7(a) at current SBA rates, seller note at whatever the seller accepts, any senior bank debt. Total annual principal and interest. That’s the denominator.
4. Run DSCR at the asking price, at 90%, and at 80%. Where does the deal start to work? That’s your negotiation range.

If DSCR at asking is under 1.2x, this is not a deal. It’s an option to buy an option. Structure something meaningfully different or move on.

The 8-Metric Assessment Order: How to Run This in Under an Hour

Run acquisition metrics in a fixed order, kill the deal as soon as any metric fails, and don’t spend more than an hour on the initial pass. The order that works: (1) rebuild Adjusted EBITDA, (2) compute implied multiple vs. sector benchmark, (3) check 3-year revenue CAGR and gross margin trend, (4) pull customer concentration, (5) look at working capital and working capital days, (6) estimate maintenance capex and FCF, (7) model debt service and DSCR, (8) sanity check the whole picture against comparable-transaction multiples. Any single failure repositions or ends the deal.

The point of the order is discipline, not thoroughness. You are trying to disqualify the deal as fast as possible, because your time is worth more than a slow “no.” Every metric you clear is one you don’t have to think about again in confirmatory diligence.

A workable rhythm for the first pass on any new target:

• Minutes 0-15: Rebuild Adjusted EBITDA against the tax return.
• Minutes 15-25: Compute implied multiple; compare to sector benchmark.
• Minutes 25-40: Revenue growth, gross margin trend, customer concentration.
• Minutes 40-55: Working capital peg, FCF, DSCR at asking price.
• Minutes 55-60: Decision — pursue at asking, counter with a repriced structure, or pass.

Common Mistakes When Running Financial Metrics on Acquisition Targets

Three mistakes that turn a solid assessment into a bad decision:

1. Trusting the seller’s EBITDA. The CIM number is a marketing document. Your rebuilt number is the negotiating position. Don’t confuse them.
2. Running the multiple on last year’s revenue instead of trailing-twelve-months. TTM captures the direction of travel. Calendar-year snapshots hide 6 months of decline.
3. Modeling DSCR at coverage of 1.1 or 1.2 because “it works.” It doesn’t work. That’s a deal one bad quarter away from a default. Under 1.5x is a repricing conversation, not a purchase.

What This Looks Like on a Live Target

Here’s a real assessment we walked through recently inside 1-on-1 coaching:

• Seller’s EBITDA claim: $1.4M on $6.2M revenue. Asking price $6.3M (4.5x).
• Rebuilt Adjusted EBITDA: $1.18M after backing out phantom add-backs (“marketing we would have done”) and normalizing owner comp to market. Real multiple at asking: 5.3x. Above sector benchmark for the size.
• Revenue growth: 8% CAGR over 3 years. Fine. Gross margin flat at 41%. Fine.
• Customer concentration: Top customer 32% of revenue, no written contract. Yellow flag — must be structured into the deal.
• Working capital: Rolling average $340K. Seller wanted the peg at $180K. That gap alone was $160K of buyer money. Renegotiated in LOI.
• DSCR at asking price: 1.28x. Not financeable at that structure.
• Repriced offer: $5.4M (4.6x), 60% cash at close via SBA 7(a), 25% seller note over 5 years, 15% earnout on customer-retention milestone. Restructured DSCR: 1.7x. Deal signed at that structure.

Total time on the initial pass: 55 minutes. Total value moved by running the metrics honestly: about $900K on a single deal. That’s what financial metrics for assessing acquisitions actually pay you.

Next Steps

If you want to run this exact 8-metric checklist on a live target, the fastest path is our financial-analysis training to get the modeling right, then Dealmaker Academy for the full sourcing-through-close system with the assessment templates pre-built. The Protégé Community is where active dealmakers post their rebuilt EBITDA workups and get feedback before writing an LOI. And if you already have a target and want the metrics run alongside you, 1-on-1 coaching is the place to do it. Nobody closes a deal from a blog post — but running these eight metrics honestly on every target is how you stop wasting Saturdays on the wrong ones.

Frequently Asked Questions

What are the most important financial metrics for assessing an acquisition?

The most important financial metrics for assessing an acquisition are Adjusted EBITDA, the EBITDA multiple, three-year revenue growth (CAGR), gross margin trend, customer concentration, working capital and working capital days, free cash flow, and Debt Service Coverage Ratio (DSCR). Run those eight in a fixed order and you can qualify or disqualify most targets in under an hour.

What is a good EBITDA multiple for a small business acquisition?

Typical EBITDA multiples in lower-middle-market M&A run 2-4x for owner-operated businesses under $1M EBITDA, 4-6x for professionalized businesses at $1-5M EBITDA, and 6-9x for institutionalized businesses with recurring revenue, a real management team, and clean financials. A specific deal lands inside the range based on size, quality of earnings, and growth rate.

How do you calculate Adjusted EBITDA for an acquisition target?

Start from net income on the target’s tax return, then add back interest, taxes, depreciation, and amortization. Then normalize for real owner adjustments — above-market owner salary, personal vehicles, family on payroll, one-time legal or consulting fees — with a document behind each add-back. Reject phantom add-backs like “marketing we didn’t do” or “a bad year.” The resulting number is typically 5-15% below what the seller’s marketing document claimed.

What DSCR do I need to finance an acquisition?

Most SBA and bank lenders require a Debt Service Coverage Ratio of at least 1.25x, and prudent buyers target 1.5x or higher for a real cushion. DSCR is Free Cash Flow (Adjusted EBITDA minus maintenance capex, cash taxes, and required working capital investment) divided by annual debt service. Deals under 1.2x DSCR at the asking price should be repriced, restructured, or walked away from.

Why does customer concentration matter so much in an acquisition?

Customer concentration matters because one lost customer conversation can wipe out a year of EBITDA. Any single customer above 25% of revenue is a serious risk; above 40% is a walk-away trigger unless there’s a multi-year contract with a substantial termination penalty. Concentration doesn’t automatically kill a deal — it just repositions the multiple, holdback, and reps to price the risk into the structure.

How do you avoid getting burned on working capital in an acquisition?

Compute the 12-month trailing average working capital from the target’s balance sheets and negotiate that number as the working capital peg inside the LOI — not after diligence. If the seller strips cash before close and leaves the business under its historical average, you fund the shortfall out of pocket from day one. This single item costs buyers six figures more often than any other line in the SPA.

What is the difference between EBITDA and Free Cash Flow in an acquisition?

EBITDA measures the earnings power of the business before capital investment; Free Cash Flow measures what’s actually left after maintenance capex, cash taxes, and required working capital investment. EBITDA sets the price. FCF pays the debt. A business with strong EBITDA but heavy capex or working capital needs can look cheap on multiple and still fail on DSCR. Always compute both.

In what order should I run the financial metrics on a new acquisition target?

Run acquisition metrics in a fixed order: rebuild Adjusted EBITDA, compute the implied multiple against sector benchmarks, check three-year revenue CAGR and gross margin trend, pull customer concentration, review working capital and working capital days, estimate maintenance capex and Free Cash Flow, model DSCR at the asking price, and sanity check against comparable transactions. Kill the deal as soon as any metric fails — that’s how you get to “no” fast on the 90% of targets that don’t work.

Where can I learn to run these acquisition metrics on real deals?

Dealmaker Academy walks the eight-metric assessment on live targets with Carl Allen and the coaching team. The Protégé Community is where active dealmakers post their rebuilt EBITDA workups, working capital pegs, and DSCR models for peer review before writing an LOI. Both are built for people running the assessment on real deals, not people reading about it.