The average search for a small business acquisition takes 19 months. A meaningful portion of that time is spent looking at listings that should have been rejected in the first five minutes. The stated SDE is inflated. The customer base is concentrated. The owner is the business. The revenue is declining and the listing buries it in vague language.
First-time buyers tend to spend too long on each listing because they do not yet know what to look for. They read every line of the listing description, model out best-case scenarios, and schedule calls with brokers before checking the fundamentals. By the time they realize a deal does not work, they have spent a week on it.
This is a screening framework, not a due diligence checklist. It covers what you can assess from a listing page and a brief broker conversation, before you sign an NDA or request full financials. The goal is a binary decision: is this listing worth the next step, or should you move on?
Step 1: Check the math on SDE and salary replacement
Start with the number that matters most. The listing will state the seller's discretionary earnings. Take that number and run it against your personal salary requirement before you read anything else.
This is a rough screen, not a financial model. It tells you whether the listing is in the range of replacing your current income. The real number depends on recasted SDE, actual loan terms, and operating capital needs. For the full framework, see salary replacement math.
If the listed SDE minus estimated debt service does not come close to your salary floor, the deal does not work at the asking price. You can negotiate, but you cannot negotiate your way from $120,000 to $200,000 in owner compensation on a listing where the seller already inflated the SDE. Move on.
The listed SDE is almost always the highest defensible version of the number. The seller and broker have already added back their personal expenses, their one-time costs, and their discretionary spending. When you eventually do your own recasting or commission a quality of earnings report, that number typically goes down, not up.
Step 2: Revenue trajectory
Most listing summaries include 3 years of revenue figures, sometimes 5. Look at the direction before you look at the levels.
Growing revenue (5%+ per year) is the best signal. It suggests the business has demand, the market is healthy, and the customer base is expanding. Even modest growth is valuable because it gives you a buffer. If revenue dips 10% in your first year, a growing business declines from a higher base.
Flat revenue is acceptable but requires more investigation. A stable business in a service industry with recurring contracts can be a solid acquisition. But flat revenue in a business that should be growing (one with no capacity constraints and a healthy local market) could mean the owner stopped investing in sales or the market is saturated.
Declining revenue is not automatically disqualifying, but it changes the nature of the deal. A business that dropped from $1.4M to $1.1M over three years is not a turnaround play for a first-time buyer. The question is whether the decline has a specific, addressable cause (a lost contract that was replaced, COVID recovery, a temporary market disruption) or whether it reflects a structural problem (market shift, competitive pressure, service quality erosion).
If the listing shows no revenue history and the broker description says the business is "growing," that is not information. It is marketing copy. Ask for 3 years of revenue before you schedule a call.
Step 3: Customer concentration
This is the single fastest way to kill a deal and the one most first-time buyers check too late. If one customer accounts for more than 20% of revenue, the business has a concentration problem. If the top three customers account for more than 50%, you are buying a vendor relationship, not a business.
The listing usually will not disclose specific customer percentages. But you can ask two questions in your first broker call that surface the answer.
"What percentage of revenue comes from the top five customers?" If the broker hesitates or reframes the answer ("the business has strong relationships with key accounts"), assume concentration until proven otherwise.
"Are any contracts up for renewal in the next 12 months?" A business with 30% of revenue in a single contract that renews in 8 months is a different risk profile than one with 200 residential customers on monthly service agreements.
Residential service businesses (HVAC, plumbing, pest control, landscaping) tend to have naturally low concentration because their revenue comes from hundreds or thousands of individual customers. Commercial service businesses (janitorial, IT services, staffing) often have higher concentration. Neither is inherently better, but the concentration profile changes how you underwrite the risk.
Step 4: Owner dependency
A business where the owner is the lead salesperson, the primary technician, or the only person with customer relationships is a business that loses significant value the day the owner leaves. This is not a theoretical risk. It is the most common reason acquisitions underperform in the first year.
The listing will almost always downplay owner involvement. Phrases to watch for:
- "Owner works 15-20 hours per week" means the owner is the critical decision-maker but has delegated the physical labor. How many of those hours are sales calls, customer relationships, and vendor management that do not transfer easily?
- "Manager in place" is a good signal, but only if the manager has actual operational authority. A manager who handles scheduling is different from one who runs the P&L.
- "Great team in place" means almost nothing without context. How long have they been there? What is the turnover rate? Are any of them the owner's family members who plan to leave after the sale?
The question you are really trying to answer: if the owner disappeared tomorrow, would the business operate for 90 days without a crisis? If the answer is no, factor the cost of building that infrastructure into your acquisition thesis. That cost might be a full-time operations manager at $65,000 to $85,000, which comes directly out of the cash flow you modeled in Step 1.
Step 5: Deferred capital expenditure
Service businesses run on equipment: trucks, tools, HVAC units, pressure washers, mowers. Owners approaching a sale sometimes defer capital purchases to inflate SDE. A fleet of trucks that needs replacing in year one is a $100,000 expense that is not in the listing SDE.
The listing rarely mentions equipment condition. In your first broker conversation, ask:
"What is the average age of the fleet/equipment?" If the answer is vague, push. A five-truck operation with an average vehicle age of 9 years is one bad transmission away from a crisis. A business with vehicles averaging 3 years old has a different capex profile.
"Has the owner made any major equipment purchases in the last two years?" An owner who bought two new trucks last year is either investing in growth or preparing the business for sale. Either is a positive signal. An owner who has not bought equipment in three years while running trucks into the ground is leaving you the bill.
Deferred capex does not disqualify a deal, but it changes the real purchase price. If a business is listed at $1.8M and you need to spend $120,000 on equipment in year one, your true acquisition cost is $1.92M. Model accordingly when you structure your letter of intent.
The five-minute disqualifiers
Some signals should end your analysis immediately. These are not judgment calls. They are structural problems that no amount of negotiation or operational improvement can fix for a first-time buyer.
SDE that cannot cover debt service plus your minimum salary. You already checked this in Step 1. If the math does not work at asking price, and the gap is more than 15%, the seller's expectations and your economics are too far apart. Even aggressive negotiation rarely moves a price by more than 10-15%.
Revenue declining for three consecutive years with no clear explanation. A one-year dip can be a blip. Three years is a trend. Unless the broker can point to a specific, verifiable cause that has already been addressed, a three-year decline in a service business means market erosion, competitive displacement, or neglect.
Single customer representing more than 40% of revenue. At 40%, you are one contract loss from a business that cannot service its debt. Your SBA lender will flag this in underwriting, and your QoE provider will adjust the effective SDE accordingly. The deal either reprices dramatically or it dies.
Owner is the sole licensed operator in a regulated industry. Some trades require a master license (plumbing, electrical, HVAC in certain states). If the owner holds the only license and no employee has one, you either need to obtain the license yourself (often requiring years of experience) or hire a licensed operator. This is not impossible, but it adds 3 to 6 months and significant cost to the transition. For a first-time buyer, it is usually not worth the complexity.
Listing has been on the market for more than 18 months. Listings that sit for over a year are either overpriced, have a structural problem that scares off buyers, or involve a seller who is not serious. Any of these makes the deal harder for you, not easier.
Putting it together
The entire screen should take 10 to 15 minutes per listing. Five minutes on the SDE and salary math. Three minutes on revenue trajectory. Two minutes each on concentration, owner dependency, and capex signals. Most of this comes from the listing page itself plus one or two pointed questions to the broker.
This is a screening tool, not a valuation. A listing that passes all five checks is worth deeper investigation: NDA, full financials, and eventually a quality of earnings analysis. A listing that fails two or more should be set aside unless the price is low enough to compensate for the risk.
The value of a screening framework is not that it finds great deals. It clears away the noise so you can spend your limited time on the listings that have a real chance of closing. First-time buyers who look at 100 listings and investigate 30 of them are slower than buyers who look at 100 listings and investigate 8. The 8 are better, and the buyer gets to them faster.
Once a listing passes this screen, the next step is signing the NDA and requesting full financials. From there, you are into the real analysis: detailed salary replacement modeling, quality of earnings review, and eventually structuring an LOI. The screen gets you to that stage with confidence that you are not wasting your time or your advisor's.