When Lab Testing Revenue Needs Its Own Tax Answer

Regulatory strategy, study design consulting, and interpretation of data or results delivered as a report are treated as exempt professional services in most states, the same as any other consulting advice. Testing services performed on tangible property, running a sample through an assay, analyzing a material's composition, is a different category, and a meaningful number of states tax services performed on tangible personal property even when the underlying work is scientific and specialized.

A firm billing a single flat fee that includes both the testing and the interpretation of results should confirm whether its state requires splitting the invoice, since bundling does not always carry the testing portion into exempt territory the way it can for some other professional services.

States vary meaningfully here: some tax lab testing and analytical services outright as services performed on tangible personal property, others exempt testing specifically tied to medical, environmental, or regulatory compliance purposes, and others follow the general rule for services in that state. A firm running samples through its own lab needs a state-by-state answer rather than a single assumption, particularly if clients ship samples across state lines to your facility from states where you have no other presence.

If your firm has built a recurring advisory retainer or a regulatory-tracking subscription product billed through a system like Stripe Billing, separate from lab testing revenue, Anrok applies SaaS-style taxability logic to that specific line and tracks nexus as it grows, while your testing revenue is tracked through a separate process built for tangible-service rules rather than software rules.

A firm with its own lab facility, running testing volume across multiple states and needing to track tangible-service taxability alongside any advisory subscription revenue, tends to fit Avalara's broader multi-tax-type coverage more comfortably, particularly once samples and invoices are flowing through an ERP or lab information management system.

Median pay for a staff accountant nationally runs $83,680 a year, with the 75th percentile above $109,810¹, and a firm running lab operations at real volume usually needs that role focused on cost accounting for the lab, not manually reconciling which states tax which testing service.

Say a client pays your firm $30,000 for a project that includes $8,000 in sample analysis run through your lab and $22,000 in regulatory strategy and interpretation delivered as a written report. In this example, the $8,000 testing portion is the piece most likely to be taxable in a state that taxes testing or services on tangible property, while the $22,000 advisory portion is often treated as nontaxable professional consulting, and itemizing the invoice this way rather than billing one combined fee generally gives you a clearer record if a state asks, though you should confirm each state's rules with a tax advisor.

If clients ship samples to your lab from states where your firm has no office or employees, confirm whether receiving and testing those samples creates nexus in the client's state, the testing state, or both, since the answer is not always intuitive and varies by how each state defines where a taxable service is performed. A lab running meaningful testing volume for out-of-state clients should not assume its home state's rules are the only ones that matter.

Ask any vendor you evaluate specifically how it handles services performed on tangible property shipped across state lines, since this is a narrower and less commonly supported feature than standard SaaS nexus tracking, and not every platform handles it well. A short call with your lab manager to map where samples actually originate, rather than assuming, is usually enough to settle this. It is a small habit that pays for itself the first time it prevents a surprise.

Confirm these points before samples cross state lines:

• Check whether receiving and testing a client's samples creates nexus in the client's state, the testing state, or both, since states define where a taxable service is performed differently.
• Look up whether each state where you run testing volume taxes testing as a service on tangible property, exempts testing tied to medical, environmental or regulatory purposes, or follows its general services rule.
• Itemize testing and advisory work on separate invoice lines so each piece gets its own defensible answer instead of one bundled fee.
• Track any recurring advisory subscription separately from lab testing revenue, because the two follow different taxability rules.