Is SaaS Taxable in Maine? No, Unless the Agent Ships Code or Runs on a Maine Server

Key Takeaway: Maine does not tax SaaS, but its exemption has two conditions that most state guides skip. Maine Revenue Services' Rule 326 exempts prewritten software that is "remotely accessed over the Internet from an out-of-state server" and where "no software is downloadable onto the licensee's computer or device." An AI agent product that ships a desktop client, a CLI or a locally installed connector fails the second condition. One hosted on a third-party server in Maine fails the first. Separately, since January 1, 2026, Maine taxes streamed and subscription audio and video at 5.5%.

The Rule That Decides SaaS

Maine taxes tangible personal property, and its definition does much of the work. Under 36 M.R.S. § 1752(17), tangible personal property "includes any computer software that is not a custom computer software program" and "includes any product transferred electronically." A product transferred electronically is "a digital product transferred to the purchaser electronically the sale of which in nondigital physical form would be subject to tax" (§ 1752(9-E)).

Read alone, that would put most software in the tax base. Rule 326, adopted effective October 6, 2025, draws the line. Section 9.3.A lists taxable transfers of prewritten software: electronic delivery, "load and leave," licenses and leases, upgrades, and "transfers of rights to use computer software installed on an in-state third-party server accessed by the holder of the software license." Section 9.3.B then carves out cloud software:

Prewritten computer software that is sold, rented, leased, or licensed for consideration where the computer software is remotely accessed over the Internet from an out-of-state server, over private or public networks, or through wireless media, and no software is downloadable onto the licensee's computer or device, is not considered a retail sale of a product transferred electronically and is not subject to Maine sales and use tax.

The exemption has two conditions, and both must be met.

Condition 1: the server is out of state. The rule names "an out-of-state server," and Section 9.3.A separately lists software on "an in-state third-party server" as a taxable transfer. A seller hosted outside Maine meets it. It matters for regional hosting providers and for any deployment that pins workloads to a Maine data center.

Condition 2: nothing is downloadable. This is the condition AI agent sellers should read twice. Many agent products are not pure web apps. They ship a desktop agent, a command-line tool, a browser extension, a local MCP server or an SDK that the buyer installs. Under Section 9.3.A(3), prewritten software transferred electronically is taxable "when downloadable in this State or for use in this State," and that "includes 'mobile apps.'" A subscription that bundles hosted inference with an installable client is, on the rule's own words, no longer a sale where "no software is downloadable."

Rule 326 does not say how to split a bundle of hosted access and downloadable software. It does say, in Section 9.4, that when software maintenance is sold with prewritten software "under a single, non-itemized price, the entire transaction is subject to Maine sales and use tax." That is a different scenario, but it shows the Department's instinct on unitemized bundles. Our reading is that a seller who wants the hosted portion treated as exempt should price and invoice the downloadable component separately. The Department has not addressed agent clients specifically.

Three Other Software Rules Worth Knowing

License fees are leases. Section 9.3.A(4): "Paying a license fee to use a prewritten software program for a defined period of time constitutes a lease or rental of the computer software." Term licenses to downloadable software are taxable like sales.

Custom work is exempt only when separately stated. Rule 326 Section 1(1) treats a modified prewritten program as custom software "to the extent of the modification, and to the extent that the amount charged for the modification is separately stated." Section 9.2 confirms custom programs are not taxable. Fine-tuning or integration work folded into one license price stays taxable.

Billing to Maine creates a presumption. Section 9.5 presumes software billed to a Maine location is used in Maine. A Maine-headquartered business that buys licenses used elsewhere pays the tax and applies for a refund. It does not apportion at purchase.

The 2026 Change: Streamed Audio and Video

Public Law 2025, chapter 388, Part G repealed Maine's Service Provider Tax and moved its services into the sales tax. It also added a new taxable service. From January 1, 2026, "digital audiovisual and digital audio services" are taxable at 5.5% (36 M.R.S. § 1752(17-B)(J); Maine Revenue Services General Information Bulletin 115, October 17, 2025).

The definition, in § 1752(1-P), is "the electronic transfer of digital audiovisual works and digital audio works to an end user with the right of less than permanent use granted by the seller, including when conditioned upon continued payment from the purchaser or a subscription." Digital audio works are "works that result from the fixation of a series of musical, spoken or other sounds" (§ 1752(1-R)). Digital audiovisual works are "a series of related images that, when shown in succession, impart an impression of motion, together with accompanying sounds, if any" (§ 1752(1-Q)).

Downloads of audio and video were already taxable as products transferred electronically (Rule 326 Section 9.1). The new service reaches access for less than permanent use, including streaming and subscriptions, and it reaches AI agents in two ways.

Generated media sold as the product. An agent that sells narrated audio, synthesized speech or generated video on a subscription or per-access basis is, on a plain reading, transferring audio or audiovisual works for less than permanent use. Whether a voice track produced on demand is a "fixation" of spoken sounds is a fair question that the Department has not answered. We would not assume it is outside the definition.

The end-user limit. The tax applies only to transfers "to an end user." Section 1752(1-P)(A) excludes a person who receives the product "for further commercial broadcast, rebroadcast, transmission, retransmission, licensing, relicensing, distribution, redistribution or exhibition." A media-generation API sold to a platform that redistributes the output to its own customers fits that exclusion on its face. A generation tool sold to a business for its own use does not.

None of this makes SaaS taxable. GIB 115 describes the change as covering audio and audiovisual works only, and Rule 326's cloud exemption is unchanged.

What Is Not Taxable

Data processing and information services are not on Maine's list of taxable services. Section 1752(17-B) is a closed list of ten, A through J, running from lodging and telecommunications to the new digital audio and audiovisual services. Telecommunications services, as § 1752(17-D)(A) defines them, exclude "data processing and information services" where the buyer's primary purpose is "to obtain the processed data or information." Compute, inference and API access delivered from an out-of-state server are not taxable.

How AgentTax Handles Maine

Verified against the engine today (buyer, B2B, $1,000, Portland 04101, 5.5%):

• Hosted software and services compute $0. saas, compute, api_access, ai_model_access, data_processing, storage, cloud_infrastructure, consulting, ai_labor, service and marketplace_fee all return $0.

• Downloads compute 5.5%. license, digital_good and data_purchase return $55. Every digital_content_type returns $55, including art_image and printable_document, because Maine taxes any product transferred electronically whose physical form would be taxable.

• Subscriptions compute 5.5%, with an advisory. subscription returns $55 and carries ME_DIGITAL_AV_SUBSCRIPTION. The engine cannot tell a media subscription from a software subscription, so it assumes media. A pure software-access subscription should be sent as saas, which returns $0.

• Information services compute 5.5%. saas with work_type: research returns $55. Maine's service list does not reach information services, but a downloaded report can be a product transferred electronically, and the engine cannot tell the two apart. This is a disclosed conservative hold.

The gaps:

• The engine does not see server location or downloadable clients. A saas sale returns $0 whether or not the product includes installable software or runs on a Maine server. If your agent ships a client, send that component separately as license. We have logged this as an under-collection risk.

• No Maine ZIPs in the rate table. Every Maine ZIP returns a ZIP_UNKNOWN advisory. The Maine Revenue Services rate table lists one general rate, 5.5%, with no local add-on, so the state rate is the right number.

For sellers, Maine requires registration when gross sales "from delivery of tangible personal property or taxable services into this State in the previous calendar year or current calendar year" exceed $100,000 (36 M.R.S. § 1754-B(1-B)(B)). There is no transaction count. The statute counts sales of taxable property and services, so it is worth checking how much of your Maine revenue is taxable before treating the threshold as crossed. See economic nexus for AI agents. To run the numbers, use the playground or the AI agent sales tax API. For other states, see the 50-state SaaS guide.

What to Watch

Two things. The first is whether Maine Revenue Services says anything about software that is partly hosted and partly installed. Rule 326's "no software is downloadable" condition was written for traditional software, and agent products increasingly ship a local component by design. The second is the first guidance on whether on-demand generated audio and video are "digital audio works" and "digital audiovisual works." Maine's new definitions are broad enough to reach them without amendment.

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.