Testing Laboratory Business Plan
There is a distinction in SBA's rules that decides your diligence budget before anyone looks at your equipment list, and it turns on what kind of laboratory you are. "54138 TESTING LABORATORIES & SERVICES" is named in SBA's schedule of Environmentally Sensitive Industries, which means your environmental investigation "must begin with a Phase I, regardless of the amount of the loan". Medical and diagnostic laboratories are not on that schedule at all. Same word on the door, opposite answer, and almost nobody checks which one they are before applying.
Verify every requirement with the named agency and your lender before committing capital. Laboratory accreditation, waste handling and in some disciplines federal certification are separate regimes from anything described here. Equipment and fit-out costs are specific to your discipline and we have not surveyed them.
Which laboratory are you?
This is the first question to settle, because the two answers lead to different loan processes.
SOP 50 10 8.1 carries Appendix 6: NAICS Codes of Environmentally Sensitive Industries. It names:
54138 TESTING LABORATORIES & SERVICES
That covers the analytical and physical testing world: environmental testing, materials and construction testing, food and agricultural testing, calibration, product safety and compliance testing.
What Appendix 6 does not contain is any medical or diagnostic laboratory code. The only healthcare entry on the schedule is "6221 GENERAL MEDICAL & SURGICAL HOSPITALS (if fuel tanks are present)", which is a hospital provision and conditional at that. A clinical diagnostic lab running patient samples is a different NAICS family and does not appear.
The SOP is also precise about how widely a code reaches: "A 5 digit NAICS code includes all industries beginning with those 5 digits." So 54138 pulls in everything beneath it, but it does not reach sideways into healthcare.
Practical consequence. If you are building an environmental or materials testing lab, assume you are in scope. If you are building a clinical diagnostic lab, you have an argument that you are not, and it is worth making explicitly in your application rather than leaving your lender to assign a code for you.
What being in scope costs
It removes the cheap route. Ordinarily "If the loan amount is up to and including $250,000, the Environmental Investigation may begin with an Environmental Questionnaire." For an "environmentally sensitive industry identified in Appendix 6", the investigation "must begin with a Phase I, regardless of the amount of the loan", conducted to "the most recently adopted standard for a Phase I ESA established by ASTM International, currently ASTM E1527-21".
And a Phase I is a starting point rather than a clearance. If the Environmental Professional "concludes that further investigation is warranted (typically a Phase II), and the SBA Lender still wants to make the loan, the SBA Lender must proceed as recommended by the Environmental Professional".
For a laboratory the risk is rarely what you will do. It is what the building has done. Lab space is frequently in older industrial or light manufacturing stock, and a Phase I will look at the whole site history, not just your intended use. Ask what the unit was before you sign.
Is a testing laboratory profitable?
The economics are unusual in a way that works in your favor once established and against you at the start.
Revenue is largely recurring and contractual. Environmental testing is driven by regulatory sampling schedules, construction materials testing by project phases, food testing by production runs. Customers do not shop around weekly, because switching labs means re-validating data.
The flip side is that the barriers which protect you later block you at the beginning. Accreditation takes time you cannot shorten, and most commercial and public-sector customers will not send you work before you hold it. That gap, between fully equipped and fully accredited, is funded entirely by your working capital and it is the number most lab plans get wrong.
We have not surveyed laboratory revenues or build costs, and will not publish figures we have not measured. Model the accreditation gap explicitly and in months.
What drives the capital requirement
- Discipline, before anything else. A water chemistry lab, a geotechnical materials lab and a food microbiology lab share almost no equipment.
- Instrumentation is the dominant line, and it is lumpy. One mass spectrometer can exceed the entire fit-out.
- The building services, not the rooms. Fume extraction, power quality, vibration isolation, water purity and in some disciplines containment. These are why lab fit-out costs do not resemble office fit-out costs.
- Accreditation itself, including proficiency testing, documentation and audit time, which is staff cost before it is a fee.
- Qualified analysts, hired and paid through the pre-revenue period because you cannot demonstrate competence without them.
How do you fund a testing laboratory?
If the business is new, the SOP's start-up test applies, and it is about the business rather than the operator:
SBA considers a business to be a "start-up" for the purpose of determining equity injection requirements if it has been in operation (i.e., generating revenue from intended operations) for 1 year or less.
A start-up needs at least 10 percent of "all costs required to become operational, regardless of the source of funds, except for lines of credit and 504 loans". For a laboratory that base is unusually large, because becoming operational includes accreditation and the staff you must employ to achieve it. Instruments on a vendor or lease line are a source of funds, not an exclusion.
Testing laboratories are not named on the Limited or Special Purpose Property list, so on a 504 project the standard structure may be available to you. The SOP says that list "is not intended to be all-inclusive" and requires the CDC to "address whether the Project Property is Limited or Special Purpose in their credit memorandum and include an explanation of their conclusion", so a heavily specified lab building is worth raising rather than assuming. Our free SBA equity requirement calculator shows what each answer costs.
What must your laboratory business plan contain?
- Your NAICS position, stated deliberately. Whether you are 54138 or a healthcare code changes the environmental process, so do not leave it to be assigned.
- The accreditation timeline, in months, with the cash to cover it. This is the single most common omission.
- Named customer types and how work actually arrives: regulatory schedules, construction programs, framework agreements. Lab revenue is contractual and a plan should show the contracts.
- Instrument list with utilization assumptions. Idle capacity on expensive instruments is where lab margin disappears.
- Waste streams and disposal arrangements, named.
- A project cost schedule covering all costs required to become operational, with the equity injection identified and its source documented.
We write SBA business plans and financial models for exactly this kind of filing, including the project cost build-up and the monthly cash flow a credit memorandum is written from. Fees are fixed and published, and we never charge a percentage of anything you borrow or raise.
Frequently asked questions
Does a testing laboratory need a Phase I environmental assessment?
If it falls under 54138 and SBA financing is involved, yes. "54138 TESTING LABORATORIES & SERVICES" is in Appendix 6, and for those industries the investigation "must begin with a Phase I, regardless of the amount of the loan".
Does the same apply to a medical or diagnostic laboratory?
Medical and diagnostic laboratory codes do not appear on Appendix 6. The only healthcare entry is "6221 GENERAL MEDICAL & SURGICAL HOSPITALS (if fuel tanks are present)". So a clinical lab has a reasonable argument that the mandatory Phase I does not apply, which is worth making explicitly to your lender.
Is a laboratory a special purpose property for SBA?
Not named on the Limited or Special Purpose Property list. But the SOP says the list is not all-inclusive and requires the CDC to record a conclusion, so a heavily specified building is worth raising early.
What is the biggest funding mistake lab founders make?
Underfunding the gap between being equipped and being accredited. You cannot invoice most customers before accreditation, and the SOP counts those costs within "all costs required to become operational" anyway.
Am I a start-up if I have run laboratories for years?
If the borrowing business has been generating revenue from its intended operations for one year or less, yes. The test is the age of the business, not the experience of the owner.
This page summarizes what SBA SOP 50 10 8.1 says as at 5 October 2026. It is general information, not lending, legal, environmental or accreditation advice, and it is not a commitment to lend. NAICS classification is determined by your lender and SBA on the facts, and accreditation requirements differ by discipline and scheme. Confirm every requirement with the relevant bodies and your lender before you commit capital.