Sales Tax Diligence Across a Lower-Middle-Market PE Portfolio

Before touching either vendor, get a clean answer to what's taxable about this business: physical products, SaaS subscriptions, professional services, or some mix. The whole comparison between Anrok and Avalara only matters once you know which category the acquired company's revenue actually falls into, since the two tools solve fundamentally different problems.

A services business that's exempt almost everywhere needs a very different level of investment than a products business selling across a dozen states, and conflating the two across a portfolio wastes diligence time on the wrong questions.

A growing regional business often crosses economic nexus thresholds in neighboring states well before anyone notices, since nobody's watching a revenue-by-state breakdown as closely as a public company would. This is exactly the kind of exposure that shows up during diligence if you look for it, and doesn't if you don't.

A quick state-by-state revenue pull against known economic nexus rules, even a rough one, tells you whether this is a live issue or a hypothetical one worth monitoring going forward.

Sales tax exposure found during diligence rarely kills a deal on its own, but it does affect either the purchase price, an escrow holdback, or the post-close integration plan, depending on how material it is. Treat it the way you'd treat any other quantifiable liability uncovered during diligence, not as a footnote.

Post-close, the fix is usually registering in the states where nexus has been crossed and starting to collect and remit going forward, sometimes alongside a voluntary disclosure conversation about past periods, which your tax advisor can help scope.

A portfolio with a SaaS platform company, a physical products distributor, and a professional services firm doesn't have one right answer across all three. Anrok is the stronger fit for the SaaS company tracking subscription-based economic nexus; Avalara is the stronger fit for the products distributor managing materials taxability and exemption certificates; the services firm may need neither beyond a periodic manual review.

Resist the instinct to standardize on one platform across the whole portfolio for the sake of simplicity, since that simplicity comes at the cost of buying the wrong tool for most of the companies it's applied to.

Once you've done this once, turn it into a standard diligence item: a state-by-state revenue pull, a taxability classification of the core product or service, and a registration status check, applied consistently to every future add-on before close. That consistency is worth more across a portfolio than any single tool choice.

A firm doing several add-ons a year benefits more from a repeatable process than from picking a platform, since the process is what actually catches exposure before it compounds post-close.

Apply the same review to every add-on before close:

1. Pull the target's revenue by state and compare each figure against the known economic nexus thresholds in those states.
2. Classify the core product or service for taxability: physical goods, SaaS subscriptions, professional services, or a mix.
3. Check registration status in every state where the target has meaningful sales or a physical presence.
4. Decide whether any exposure found is a purchase price item, an escrow holdback or a post-close integration task, and record the reasoning.
5. Name an owner, either a portfolio operations partner or the portco finance lead, to revisit nexus as the business grows during the hold.

A diligence finding that gets fixed at close but never monitored again just delays the same problem to the next state the portco expands into organically. Someone, either a portfolio operations partner or the portco's own finance lead, needs explicit ownership of revisiting nexus exposure as the business grows during the hold, not only at acquisition and at exit.

Build this into the 100-day plan for every add-on alongside the more traditional integration workstreams, since sales tax nexus tends to get deprioritized against revenue growth and cost-cutting unless someone assigns it explicitly.

A buyer's diligence team will run the same state-by-state nexus check you should have been running throughout the hold, and a clean answer at exit is worth more than scrambling to explain a gap discovered by the buyer's own advisors. Sales tax exposure found late in a sale process creates exactly the kind of last-minute price adjustment conversation nobody wants during a signed LOI.

Treat the ongoing nexus monitoring built during the hold as something that pays for itself at exit, not just as a compliance cost carried for its own sake.