October 1, 2026 Overcoming Sales Tax Pyramiding in 2026

Amid ongoing financial uncertainty, sales tax pyramiding and compliance remains a foremost financial risk for many supply chain organizations.

By Ken Webster, Head of Tax Research, Numeral

Key Takeaways

• With over 12,000 individual tax jurisdictions each with its own requirements, navigating sales tax pyramiding and compliance expectations have become even more pivotal as organizations face greater financial strains.
• Many manufacturers are both buyers and sellers meaning these organizations find themselves having to navigate two sets of sales tax compliance expectations.
• Supply chain companies struggle to understand which exemptions they do and do not qualify for opening themselves up to significant financial penalties.
• Understanding how to manage exemptions and liabilities can be hugely impactful in mitigating risks and fortifying financial operations.

What does it take to manage sales tax compliance in today’s rapidly evolving marketplace?

From geopolitical instability to burgeoning trade wars, many supply chain organizations once again find themselves scrambling to maximize every dollar possible as margins tighten and the economic landscape remains uncertain. In the face of these unprecedented headwinds, it isn’t surprising that organizations are leaving no stone unturned in their financial optimization journeys with one particularly thorny area emerging as a foremost priority: sales tax compliance.

With over 12,000 individual tax jurisdictions each with its own unique – and frequently shifting – requirements, navigating sales tax expectations has become even more pivotal as organizations face greater financial strains. And because a vast majority of manufacturers are both buyers and sellers, these organizations find themselves in the unenviable position of having to navigate two sets of compliance requirements.

This dual status means that manufacturers have a notoriously difficult time navigating sales tax compliance, opening them up to costly risks of sales tax pyramiding – where a product is taxed multiple times across a supply chain. Fortunately, exemptions are available for manufacturers to take advantage of. However, because of the complexity of the sales tax ecosystem, many manufacturers miss out on these opportunities, mistakenly claim exemptions that they are not actually qualified for, or, in the case of sellers, specifically accept exemptions that are not valid – resulting in additional compliance headaches and costly fines.

As this ongoing economic pressure continues to rattle many manufacturing businesses, here are some of the must-knows that decision makers should keep in mind as they look to close exemption compliance gaps and cut down on sales tax-related financial waste.

Understanding “direct contact” vs. “integrated plant” standards

One of the most important details organizations must understand in their sales tax compliance journeys is whether a state deploys a more rigid “direct contact” standard or a more liberal “integrated plant” standard in determining sales tax exemptions.

There is no universal definition of direct contact or integrated plant standards, so requirements vary from state to state – making the process even more complicated. That said, direct contact often means that only items that directly contribute to the manufacturing of a product itself are exempt. Texas, for example, provides an exemption for certain equipment that is necessary or essential to manufacturing and directly causes a physical or chemical change in the product.

On the other side, integrated plant standards generally only require that items be part of the manufacturing process more broadly speaking, even if it doesn’t directly contribute to the physical fabrication of the product itself. For example, certain states – like Pennsylvania – allow for exemptions of R&D processes that aim to produce an improved version of a product.

What is usually exempt

While exemptions requirements vary, generally speaking, exempt items fit into four buckets: raw materials, machinery and equipment, repair and replacement parts and energy and utilities. For states with direct contact standards, these exemptions only apply to items that are directly tied to the fabrication of a given product at a bare minimum. However, many direct contact standard states apply an additional layer to qualify for this exemption by setting minimum use thresholds that products must meet in the manufacturing of a particular item in order to qualify. This is known as a “predominant use requirement.” Kansas, for example, exempts machinery and equipment that is an integral or essential part of an integrated production operation, and defines ‘primarily’ as use more than 50 percent of the time.

Again, exemptions across these qualifying buckets vary from state to state and often significantly so. Maine, for example, allows for broad machinery and equipment and raw materials-related exemptions, but only allows for energy and utilities exemptions when they are for direct manufacturing use. Massachusetts, however, has broad exemptions across all categories for qualifying manufacturers, while states like Delaware, Montana and New Hampshire have no state sales tax at all.

These exemptions each have their own stipulations and qualifications meaning organizations need to keep their ears to the ground to constantly monitor for exactly what qualifies and what doesn’t as requirements frequently change.

Multi-state exemption certificate management

Because of how often sales tax shifts can occur, managing sales tax in a single state can be incredibly painstaking for manufacturers. This reality is often multiplied infinitely for many manufacturers – particularly sellers – given a majority have operations that span at least several states.

As sellers are required to remit sales tax to states where they have established economic nexus, sellers must collect exemption certificates for each respective state and make sure they are following required regulatory guidelines as well. Organizations need to account for a variety of factors in relation to exemption certificate management ranging from what types of purchases are exempt in a given state to how long exemption certificates are valid for.

This places a significant burden on sellers who need to make sure that they have valid exemption certificates on file for each buyer and that they have an established reporting process with clear documentation for each purchase where exemptions are applied. Sellers need to ensure they have the correct seller name and address information, buyer tax ID, accurate purchase description and signatures in a centralized easy to access location. This will allow sellers to clearly outline why they did not collect sales on specific transactions and avoid costly fines should an audit arise.

Liability if exemptions are not applied properly

So, what happens if you are a seller and accept an invalid exemption certificate or are missing necessary certificate documentation for an exemption that was granted? In short: you’re often on the hook.

Even just one missing exemption certificate can result in significant penalties – often in excess of six figures. Because of all the conditional and nuanced aspects involved in sales tax compliance, manufacturers are routinely subjected to audits to ensure that each exemption is properly executed and valid.

This has resulted in many manufacturers adopting automation to help manage their exemption workflows more efficiently. For example, instead of manual review and management of each exemption certificate for individual transactions, manufacturers are integrating their exemption operations directly with their ERP and point of sale systems to dynamically calculate applicable sales tax and execute any relevant exemptions. Automation is also helping manufacturers get ahead of any potential exemption issues by enabling them to detect when exemption certificates may be expiring, allowing them to proactively connect with buyers for updated certificate information.

Meeting compliance expectations

With so many moving parts it is easy to see why so many manufacturers continue to struggle to surmount their sales tax compliance challenges once and for all. However, by focusing on these few key areas and leaning further into their technology capabilities, manufacturers can lay a foundation that can help them tackle their sales tax challenges of today as well as in the future.

About the Author:
Ken Webster is head of tax research at Numeral.

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