Oklahoma SB 44: contractors buying for exempt entities

Oklahoma SB 44 takes effect on November 1, 2026, and it reaches a rule most contractors learn early: on a construction job, the contractor is treated as the consumer of the materials and pays the sales tax on them, and the owner's exemption usually stays with the owner. As the Oklahoma Tax Commission summarizes the bill, it exempts sales to contractors and subcontractors performing contracts with entities exempt under the amended statute, provided the right documents reach the vendor. How far that reaches for any one owner is the part still being written.

The question worth walking through is what that looks like on a real job, in the order it runs: bid, purchase, invoice, audit. One caution first: the Commission's implementing rules have been adopted but were still listed as pending the Governor's approval on October 13, 2026, and the posted version is a markup that's hard to read with confidence.

What Oklahoma SB 44 changes, as the Tax Commission describes it

Start with the baseline. Under the Commission's current permanent sales tax rules, a contractor is the consumer or user of the taxable goods and services it buys to develop and improve real property, materials and equipment included, and it pays sales tax on those purchases.

The Commission's online help center says it in plainer terms. A contractor can't get a sales tax permit to buy materials tax free, and Oklahoma doesn't collect sales tax on the contract or the labor for improvements to real property.

There are exceptions. The current rule limits a contractor's ability to buy exempt on someone else's status to a short, closed list of situations, with certain public contracts and construction contracts with churches among them. That's the rule as it stands today, not a prediction of what carries over. We've written about that baseline in our piece on Oklahoma contractors and sales tax myths.

SB 44 adds to that picture. According to the Commission's 2026 Tax Legislation Summary, the bill amends Section 1356 of Title 68 of the Oklahoma Statutes, effective November 1, 2026.

As the summary describes it, the bill exempts from state sales tax the sales of tangible personal property and services to contractors and subcontractors performing contracts with entities that are exempt under what the summary calls a new subsection (B) of that statute. Tangible personal property is the sales tax term for physical goods.

Two conditions come attached. The contractor has to give the vendor the exempt entity's exemption certificate along with proof of the contractual relationship, and the vendor has to keep that documentation as evidence of the exemption.

This article rests on the Commission's summary and its rulemaking record, not on the text of the bill itself, which is worth reading directly before a job is priced on it.

The emergency rules: adopted, not yet approved

The Tax Commission adopted emergency amendments to its sales and use tax rules on September 22, 2026. On October 13, 2026, the Commission's agency rules page still listed them as pending the Governor's approval.

An impact statement filed with the rules, dated September 21, 2026, explains the hurry. It says the rules give immediate guidance on SB 44 ahead of the effective date and are limited to what's needed for initial implementation. Other procedural provisions may follow through regular rulemaking.

That statement counts about 5,000 entities exempt under the statute and about 90,000 vendors statewide as affected. The number of contractors and subcontractors is listed as unknown.

It also says something a contractor should read twice: the rules clarify how an existing limitation in the statute applies to the new exemption. An exemption with a limitation attached has edges.

What the posted text shows, and what it doesn't

Here is the part we want to be plain about. The document the Commission posted is a markup of the existing rules, and in the form we could read, struck words and added words run together. We can't tell you from it, with confidence, how any given section will finally read, including whether a revised sentence permits or bars a contractor's exempt purchases.

What can be said safely is structural. The contractor rule in the posted text carries a list, expressly not exhaustive, of exemptions that generally don't extend to contractors. No list like it appears in the contractor paragraph of the current permanent rule we could read, which suggests it's added text, though a markup can't confirm that.

The examples in the posted text are the federal government, state government, certain trust authorities, federally recognized Indian tribes, and exemptions that by their nature can't be handed to someone else. That last group includes exemptions that apply only to specific transactions, such as admission ticket sales, and exemptions administered through a refund process.

Part of that list is familiar. The help center's existing answer on contractors using a customer's exemption already puts the federal government, the State of Oklahoma and municipal trust authorities among its examples on the non-exempt side.

Beyond the general rule, the markup revises the contractor paragraphs in more than two dozen entity-specific exemption sections, each with language keyed to November 1, 2026. Those are the sentences we can't read reliably.

So we won't say here that any particular kind of owner's job does or doesn't qualify. The approved text of the section covering the owner's exemption is what controls, and it's what both the contractor and the vendor should have in hand.

At the bid: who keeps the tax savings?

The exemption is on the contractor's purchases, and nothing in the Commission's summary says who ends up with the money.

That's a contract question, which is why we think of SB 44 as a drafting issue as much as a tax one.

Lump sum contracts

In a lump sum contract, the contractor quotes one price for the whole job. If that price included sales tax on materials and the purchases turn out to be exempt, the difference generally stays with the contractor unless the contract says otherwise. If the bid assumed the exemption and it doesn't hold, the contractor generally absorbs the tax.

Cost-plus and pass-through tax

With a cost-plus contract, the owner reimburses actual cost plus a fee, so tax that isn't paid is tax the owner doesn't reimburse. The same is true where sales tax is its own pass-through line. Here the owner captures the savings and the contractor carries the paperwork for someone else's benefit.

A pattern we see with tax changes like this one: the argument is rarely about the statute. It tends to surface months later as a disputed change order or a final pay application that's short by the amount of the tax, with each side pointing to a contract that never mentioned the exemption.

A hypothetical

Take a hypothetical general contractor that submits a lump sum bid in mid-October to an owner holding an Oklahoma exemption letter, with most materials to be ordered in December by the contractor and two subcontractors. Before that number goes out, a few things need answers the bid form won't supply:

• whether the approved rule for this owner's type of exemption extends to contractor purchases at all;
• whether the price assumes tax on materials, and whether the bid says so;
• who gets the benefit, or bears the cost, if that assumption turns out wrong in either direction;
• whether each subcontract carries the same assumption.

Questions the sources leave open

The Commission's summary and impact statement are silent on several points that matter at bid time. We're flagging them, not answering them.

• City and county sales tax. The summary describes the exemption as one from state sales tax and doesn't address local tax.
• Use tax on materials bought out of state. The help center's existing guidance has a contractor who buys materials tax exempt out of state apply for a consumer use account to remit the tax, and the SB 44 materials don't address it.
• Contracts signed before November 1 with purchases made after it.
• Refunds of tax paid before November 1.
• Tools and equipment the contractor keeps, as opposed to materials that become part of the building.

Any of these can change what a bid should assume. They're questions for the approved rules or the Commission itself, and we've written separately about asking the Tax Commission for an answer you can rely on.

At the purchase: what the vendor will ask for

The vendor's position is already written down. The Commission's vendor publication on exempt sales, last revised in December 2025, doesn't mention SB 44. It starts from the presumption that every sale is taxable unless specifically exempted, and it holds the vendor liable for tax it should have collected.

Documentation is how a vendor gets out from under that. For certain of the contractor exceptions already in the rules, the vendor publication and the posted rule text both list what the vendor must obtain:

• a copy of the exemption letter or card issued to the exempt entity;
• documentation of the contractual relationship between the contractor and that entity;
• the purchaser's certification on the face of each invoice or sales receipt.

The Commission's summary of SB 44 names two documents for the new exemption, the entity's exemption certificate and proof of the contractual relationship, which line up with the first two. Whether the approved rules call for the full set on every SB 44 purchase is for the final text to settle, and a careful vendor may ask for all of it regardless.

Two practical points follow. First, the letter or card belongs to the exempt entity, not to the contractor, so the contractor has to get a copy from the owner, and the contract is a sensible place to require it. Whether an owner holds an Oklahoma exemption in the first place is its own question, one we've covered in our article on the Oklahoma nonprofit sales tax exemption.

Second, the sources we read don't define what counts as proof of the contractual relationship. The help center's existing guidance describes the exempt entity giving the contractor a copy of its exemption permit and a letter designating the contractor as its purchasing agent for the project.

Subcontractors

The Commission's summary covers subcontractors as well as contractors. A subcontractor's contract, though, is usually with the general contractor and not with the exempt owner, and what we read doesn't spell out how a subcontractor shows the connection.

What tends to happen on jobs with layered subcontracts is that the general contractor has the owner's letter in a file and nobody below the first tier has ever seen it. If the exemption is going to be used at every tier, the subcontract is the place to require that the documents flow down, and to say who bears the tax if a vendor declines to honor the exemption.

On the invoice: the certification nobody remembers

The third document is the one that gets skipped. As the rule text describes it, the purchaser certifies on the face of each invoice or sales receipt, naming the exempt entity and stating that the purchases are made on its behalf. The certification also states that the purchases are necessary to complete the contract.

Read that last phrase with a purchasing clerk in mind. A certification that the purchases on a ticket are necessary to complete a named contract is a statement about every line on it, so a ticket that mixes this job's conduit with stock for the shop is a problem on its face. The fix is dull: tickets kept separate for each job, with the certification language preprinted.

There's a consequence on the purchaser's side too. The vendor publication says that when the Commission finds a purchaser improperly presented exemption documents, or used the property for a nonexempt purpose, the purchaser is liable for the tax and the vendor isn't held liable. It also mentions a $500 fine.

At the audit: where the risk sits

A sales tax audit of a supplier doesn't begin with a debate about the law. In our experience it begins with a list of sales on which no tax was collected and a request for the document behind each one.

Under the existing vendor rules as the publication lays them out, relief depends on the vendor having the exemption documentation at the time of the sale or within 90 days after it. The publication tells vendors to keep the exemption document with the invoice for three years from the invoice date or the date the tax was remitted, whichever is later.

That publication doesn't address SB 44, and nothing we read says whether those general rules apply unchanged to the new exemption. A vendor is likely to assume they do, which gives a vendor with a thin file every reason to charge the tax and let the contractor sort it out later.

For the contractor, the exposure is quieter. If an exemption is claimed on a job where the approved rule doesn't extend the owner's exemption to contractors, the publication's rule on improperly presented documents points at the purchaser, and the contract decides whether that cost can be passed along.

This is the government-favorable side of the change: the presumption runs toward taxability, and the Commission's examples show it doesn't read every exemption as transferable.

The taxpayer-favorable side is just as plain. Where an owner's exemption does extend and the documents hold up, tax that used to be buried in construction cost can come out of the job. The Commission's impact statement rates the effect on each affected group as positive or neutral.

What to watch between now and November 1

Next comes the Governor's action on the emergency rules. Once approved text is posted, the section for a given owner's exemption can be read without guessing at a markup, though regular rulemaking may still change what vendors ask for later.

Meanwhile, bids are going out for work that will be bought after November 1. A bid that states its tax assumption, paired with a contract that says who gets the benefit or bears the cost if it changes, turns an open tax question into an allocated risk.

If you're pricing or supplying work for an exempt owner this fall and the contract doesn't say who carries the sales tax, that's a good point for a conversation. You can reach us through the contact page or at our Oklahoma City office. Sorting out the allocation before the bid goes in is almost always cheaper than arguing about it at final payment.

This article is general information about Oklahoma, Texas, and federal law, not legal advice, and it does not create an attorney-client relationship. Facts matter; talk to a lawyer about yours.