Is SaaS Taxable in Hawaii? Yes, and for AI Agents the Real Question Is Wholesale or Retail

Key Takeaway: Hawaii does not have a sales tax. It has a general excise tax (GET) on the seller's gross receipts from doing business in the state, at 4% on retail activity and 0.5% on wholesale. Every county now adds a 0.5% surcharge, so the retail rate is 4.5% statewide. For AI agents, the classification question that decides whether a transaction is taxed at all in other states does not work that way here. Almost everything is taxed. The question that matters in Hawaii is which rate applies, and the answer turns on whether the agent's output is resold and whether it is a service or intangible property.

The Base: A Tax on the Seller, Not a Sales Tax

The Department of Taxation says this first in its own guidance. Tax Facts 37-1 (revised May 2025) answers "Is the GET a sales tax?" with "No." A sales tax is a tax on customers. The GET is a tax on businesses, and businesses are not required to collect it from customers. The Department's brochure An Introduction to the General Excise Tax (revised May 2025) sets the state rates: 0.15% on insurance commissions, 0.5% on manufacturing and on "wholesaling activities in which a business sells goods or services to another business for resale," and 4.0% "on all other activities including the retail sale of tangible personal property (goods) or services."

That last phrase covers SaaS, hosted inference, GPU time and consulting output. No enumerated list of taxable services exists to check an AI product against, and there is no true-object test that moves a data-processing charge out of the base the way Tennessee's exclusion or West Virginia's EDP exemption does. If an agent sells something to a Hawaii customer in the course of business, the receipts are within the GET.

Three consequences follow for anyone used to a sales-tax state.

The customer's status does not exempt the sale. The brochure is explicit that sales to nonprofit and religious organizations are "generally subject to GET," because the tax falls on the seller. Tax Facts 37-1 adds that the Department does not issue exemption certificates to tax-exempt organizations, government agencies or credit unions. There is no B2B exemption either. A business buyer pays the same rate as a consumer.

Passing the tax on is optional, and it is grossed up. A business may visibly pass the GET on to the customer, but is not required to. Because the seller owes tax on gross receipts that include the tax it passes on, the maximum pass-on rate is higher than the tax rate. The Department sets it at 4.712% in each of the four counties. On a $100 sale, that is $4.71, for a total of $104.71. Charging more than the tax the business will actually pay is a consumer-protection violation, and section 237-49 HRS prohibits a seller that owes GET from claiming there is no tax.

Hiding the tax does not remove it. Tax Facts 37-1 says the GET "is a part of the price the customer is charged whether it is visibly passed on or not." A seller that builds the tax into a flat per-call price still owes 4.5% of that price.

Every County Now Levies the Surcharge

The county surcharge applies to activities taxed at the 4% rate, and not to the 0.5% or 0.15% rates. According to the Department's county surcharge page, all four counties have adopted it at 0.5%:

• City and County of Honolulu: from January 1, 2007

• County of Kauai: from January 1, 2019

• County of Hawaii: 0.25% in 2019, then 0.5% from January 1, 2020

• County of Maui: from January 1, 2024

Each runs through December 31, 2030. The surcharge applies to use tax as well as GET, and the Department states that out-of-state businesses are subject to it too. Taxpayers with activity in more than one county allocate gross income among the taxation districts under the Department's administrative rules and report the split on Form G-75. The practical result for 2026 is a flat 4.5% on retail activity anywhere in the state.

The Rate Question: Wholesale or Retail

In most states, an agent that buys a service in order to sell a finished service claims a resale exemption or nothing at all. In Hawaii, the purchase is still taxed, but at 0.5% instead of 4.5%, if it counts as wholesale. For a multi-agent pipeline, that difference compounds with every hop.

Tax Information Release No. 2019-03 (Revised), which implements Hawaii's marketplace facilitator law, contains the point AI builders are most likely to miss. The TIR explains that the wholesale rate needs a specific imposition provision. The GET statute has one for tangible personal property and one for services, but the provision that taxes sales of intangible property "does not contain a provision that allows for the imposition at the wholesale rate." The Department's conclusion is that "the wholesale rate is not available for sales of intangible property regardless of whether it is sold through a marketplace facilitator."

So in Hawaii, the service-versus-intangible line does not decide whether the sale is taxed. It decides whether a reseller can get the 0.5% rate. Suppose an agent licenses a dataset, model weights or a content library to another business that builds on it. If the sale is characterized as a sale of intangible property, it stays at the retail rate even though the buyer resells. If the same work is delivered as a service performed for the buyer, it may qualify. We have not found Department guidance applying this line to hosted AI output, and we do not assert which side a given API call falls on. Contracts should say plainly what is being sold.

Marketplaces for Compute Are Named

The same TIR lists the business models that count as marketplace facilitators. One entry reads: "Remote intangible property or data access marketplaces, such as those that provide customers access to third-party data stores, other intangible property, or computing power." Another covers remote service marketplaces connecting customers with providers of computer programming "or other services that can be provided remotely."

That is a close description of an agent marketplace that lists third-party agents and collects payment. A facilitator engaged in business in Hawaii owes GET at the retail rate on sales made through its marketplace into the state. The TIR also deems the underlying seller's sale to the facilitator a sale at wholesale, subject to the intangible-property limit above. A platform operator taking payment for third-party agent work from Hawaii customers should assume it is the retail-level taxpayer.

Use Tax and Nexus

A buyer whose seller is not subject to the GET owes use tax. The brochure describes it as a complement to the GET, imposed on "property, services, contracting, and intangibles imported for use in Hawaii" from an unlicensed out-of-state seller, at the same rates as the GET, measured on landed value. One detail matters for agent operators. An out-of-state seller may voluntarily register to collect use tax from its non-business customers. Even then, it does not collect from Hawaii business customers, who report the use tax themselves on their general excise/use tax returns. A Hawaii business buying agent services from a mainland provider should expect to self-assess.

On nexus, the brochure and TIR 2019-03 state the economic threshold: gross income of $100,000 or more in the state, or 200 or more transactions, in the current or preceding calendar year. The 200-transaction prong is still in the Department's current guidance. An agent billing per call can cross it with very little revenue, which makes it more relevant here than in the states that have dropped their transaction counts. For how the thresholds interact across states, see our economic nexus guide.

How AgentTax Handles Hawaii

Verified against the engine today (buyer, $1,000):

• Every category is taxable at the same rate. SaaS, compute, research, consulting, data_purchase and marketplace fees all compute 4.5% ($45.00) at Honolulu 96801 and Hilo 96720. B2B and consumer results are identical. Both are correct for the retail rate.

• An advisory that overstates the doubt. Each Hawaii response carries STATE_DEFAULT_NO_CATEGORY_RULE, because most categories fall back to the state's digital-taxable default instead of an explicit matrix rule. In a broad gross-receipts state, that default is the settled answer, not a conservative hold.

Two gaps, stated plainly:

• Local coverage is two ZIPs, and the gap under-collects. Only 96801 and 96720 are in the rate table. Every other Hawaii ZIP returns the 4% state rate with a ZIP_UNKNOWN advisory. That includes downtown Honolulu (96813) and all of Maui and Kauai, where the 0.5% surcharge applies. Until the table is fixed, reserve at 4.5% for any Hawaii address. We have filed the correction for review.

• The 0.5% wholesale rate is not modeled. A business buyer that resells the service it buys is charged the retail rate. That over-collects by 4 points where the wholesale rate applies. It is the conservative direction, but it is still wrong on those facts. The engine also does not compute the 4.712% maximum pass-on rate; the figure it returns is the tax, not the grossed-up line a seller may show on an invoice.

To run the numbers, use the playground or the AI agent sales tax API.

What to Watch

Two things. First, whether the Department says how the service-versus-intangible line applies to model and data licensing, since that decides the resale rate for a growing share of agent-to-agent trade. Second, the 2030 sunset on all four county surcharges. Every county's surcharge currently ends on the same date, and any extension will change the statewide rate.

This analysis is for informational purposes only and does not constitute legal or tax advice. This post reflects AgentTax's current interpretation of evolving law. Consult a licensed tax professional for compliance decisions.