You've decided to buy a machine shop. Maybe you're a 20-year machinist ready to own the operation, a business person looking at manufacturing because the fundamentals make sense, or someone who found a listing on BizBuySell and the numbers caught your eye.
Whatever brought you here, the gap between "this looks interesting" and "I'm signing the papers" is where most buyers either make a smart deal or an expensive mistake. Here's what to pay attention to.
You're not buying equipment. You're buying cash flow.
The first thing most buyers fixate on is the equipment list. It makes sense — machine shops are physical businesses and the machines are the backbone of the operation. But a $200,000 CNC lathe doesn't generate revenue by itself. What generates revenue is the combination of customers who need work done, employees who know how to do it, and systems that keep it all running.
When you evaluate a machine shop, the equipment matters — but it's third on the list. First is the earnings. Second is the customer base. Third is the equipment and the people who run it. If the cash flow isn't there, a building full of nice machines is just an expensive hobby.
Learn to read the financials — or hire someone who can
The seller is going to present you with financials that make the business look as strong as possible. That's not dishonest — it's how every business gets sold. But your job is to understand what those numbers actually mean.
The most important number is Seller's Discretionary Earnings (SDE). This is the total financial benefit the business provides to one owner-operator — net income plus the owner's salary, benefits, personal expenses run through the business, and one-time costs that won't recur. It's the number your purchase price will be based on, and it's the number most commonly manipulated.
Watch for inflated add-backs. The seller says they spent $40,000 on a "one-time" equipment upgrade last year. Was it really one-time, or does something major need replacing every couple of years? The seller adds back $80,000 for "owner compensation" but only pays themselves $50,000 on the books — where's the other $30,000 coming from? These are the questions that separate buyers who get a fair deal from buyers who overpay.
If you've never read a set of financials for a small business, get help. This isn't the place to learn on the job. The cost of an advisor or accountant reviewing the financials before you sign is trivial compared to the cost of discovering a problem after closing.
Ask the customer concentration question on day one
If you ask the seller one question, make it this: what percentage of revenue comes from your top three customers?
If the answer is 50% or more, you need to understand exactly how durable those relationships are. Are there contracts? How long have they been customers? What would it take for them to switch to a competitor? Would they stay if the owner left?
Customer concentration isn't automatically a deal killer. Plenty of successful shops run on a handful of big accounts. But it changes the risk profile of the deal, and it should change the price you're willing to pay. A shop with 50 customers and none over 10% of revenue is worth more than a shop with the same earnings but three customers making up 70% of the work — because the second shop is three phone calls away from a very bad year, or worse.
The owner is probably the most important employee
In most machine shops under $5 million in revenue, the owner is quoting jobs, managing the floor, maintaining customer relationships, and making every significant decision. When the owner leaves, all of that has to come from somewhere.
Ask yourself: what happens to this business on the Monday morning after the seller walks away?
If the answer depends on you personally stepping into every role the owner currently fills, that's not a business — it's a job you just bought. A good acquisition has at least some management layer, some documented processes, and some customer relationships that don't live exclusively in the owner's head.
The transition period matters too. Two weeks of training on a 30-year-old operation is not a transition — it's a handshake. Look for sellers who are willing to stay 6 to 12 months, even part-time. And get the transition terms in writing as part of the purchase agreement, not as a verbal promise.
Equipment: condition matters more than age
A well-maintained 2005 CNC mill that runs every day is worth more to you than a 2020 machine that's been sitting idle with deferred maintenance. When you evaluate the equipment, you're looking for three things: condition, relevance, and capacity.
Condition means maintenance records, not cosmetics. Ask when spindles were last rebuilt. Ask about coolant systems, way covers, ball screws. If the seller can't produce maintenance records, assume the worst.
Relevance means the equipment actually matches the work the shop does. A shop that machines aluminum automotive parts doesn't need a massive boring mill. Equipment that's impressive but underutilized is just a cost, not an asset.
Capacity means room to grow — or the lack of it. If the shop is running three shifts at full utilization, you're buying a business that can't grow without capital expenditure. If it's running one shift with modern equipment, you've got built-in upside. As in many cases, what you're looking for is a happy medium. Some under-utilization providing growth opportunities in a business that's still profitable anyway? Perfect.
Get an independent equipment appraisal if the deal is significant. Don't rely on the seller's estimate of what their machines are worth, and don't rely on your own expertise unless you're an expert. An expert machinist is not necessarily an expert on machinery values.
The workforce can make or break the deal
You're not just buying machines. You're buying a team — and they didn't choose to work for you. They chose to work for the previous owner, and they might not stay.
Before you close, understand who the key employees are and what it would mean to lose them. The lead programmer who's been there 15 years and knows every customer's tolerances by memory is not replaceable in a job posting. If that person walks, you've got a real problem.
Talk to the employees if the deal structure allows it. Understand their concerns. Some will be relieved — a new owner might mean investment and growth. Others will be skeptical and start interviewing the day the sale is announced. Have a plan for retention, and know which people you absolutely cannot afford to lose and what it will take to keep them.
Real estate: buy it, lease it, or walk away from it
Many machine shops include the real estate as part of the deal — or offer it separately. This is a bigger decision than most buyers realize.
If you buy the property, you're making two investments at once: a business and a commercial real estate asset. Your financing gets more complex, your total capital requirement goes up, and you're now responsible for a building. The upside is that you control your occupancy costs and build equity.
If you lease from the seller, you're keeping your cash available for the business but creating a landlord-tenant relationship with the person you just bought from. Make sure the lease term covers your loan — if you're financing with an SBA 7(a) loan over 10 years, an 18-month lease is a problem your lender will flag before you do.
Either way, understand the property's condition. A 40,000-square-foot industrial building can have six-figure problems hiding in the roof, the HVAC, the electrical service, or the floor. Get an inspection just like you would on a house, but with someone who knows industrial properties.
Financing: know your options before you need them
Most machine shop acquisitions in the $500K–$3M range are financed through SBA 7(a) loans. These are government-backed loans through commercial banks that allow buyers to purchase a business with as little as 10-20% down. The SBA doesn't lend directly — your local bank does, with the SBA guaranteeing a portion.
Seller financing is the other common piece. Many sellers will carry 10-20% of the purchase price as a note, paid back over 2-5 years. This is a good sign — it means the seller has confidence in the business's ability to generate the cash flow to pay them back. If a seller refuses to carry any note, ask why.
Get pre-qualified before you start looking seriously. Talk to a community bank or credit union that does SBA-preferred lending — not a national bank. The local lender will know the market, move faster, and be more flexible on deal structure.
Due diligence isn't optional — it's where the deal gets real
Everything up to this point has been based on what the seller told you and what the listing says. Due diligence is where you verify it.
At minimum, you or someone working for you should review: three years of tax returns, three years of profit and loss statements, a balance sheet, an accounts receivable aging report, an equipment list with maintenance records, all existing contracts and leases, employee records, and any pending legal issues.
The seller will ask you to sign a Non-Disclosure Agreement before sharing this information. That's normal and expected. What's not normal is a seller who won't share financials, delays document delivery, or has explanations for everything that sound a little too polished. Trust your gut — if something feels off, dig deeper or walk away.
The bottom line
Buying a machine shop can be one of the best investments you make — or one of the worst. The difference isn't luck. It's preparation.
The buyers who do well are the ones who understand the financials before they make an offer, who ask the hard questions about customers and employees and equipment before they fall in love with the opportunity, and who get professional help on the things they don't know.
If you're evaluating a machine shop acquisition and want someone to look at the numbers with you — what the business is actually earning, what the equipment is worth, what the deal structure should look like — that's the work Gimbal Partners does. Reach out for a conversation. No fee for the first call, and no pressure to move forward.