# Use Tax Accrual: What AP Should Do When a Vendor Invoice Charges No Sales Tax > An invoice with zero sales tax is not a tax-free purchase: the buyer may owe use tax. See how AP finds untaxed invoices, decides, and accrues use tax right. - Source: https://parserai.co/blog/use-tax-accrual-vendor-invoices-no-sales-tax-accounts-payable - Published: 2026-10-22 --- An invoice from an out-of-state vendor arrives with a tax line of zero. AP checks the total, matches the order and pays. For a taxable purchase, that zero only means the vendor did not collect the tax, so you probably owe it as use tax. This post covers what use tax is, why AP is the right place to catch it, and a monthly routine to accrue it without reviewing every invoice by hand. Key takeaways - When a vendor does not charge sales tax on a taxable purchase, the tax does not go away: the buyer usually owes the same amount as use tax and has to report it. - Accounts payable is the only place every untaxed purchase passes through, which makes the invoice review the natural point to decide on use tax. - The decision needs four facts from each invoice: what was bought, where it was shipped, what tax the vendor charged, and whether the purchase is covered by an exemption. - A short monthly routine that flags zero-tax invoices, applies the ship-to rate and books one accrual entry keeps use tax from turning into an audit assessment with interest. ## Sales tax the vendor did not collect In most US states that levy a sales tax, there is a matching use tax. It applies to the same goods and many of the same services, at generally the same rate, and it is owed when a taxable item is bought for use in the state without sales tax being collected. The idea is simple: a business should not avoid the tax because it bought from a seller who did not charge it. Since the 2018 Supreme Court decision on remote sellers, many more out-of-state vendors register and collect tax where their customers are. But plenty still do not: small vendors under a state's sales threshold, foreign suppliers, vendors who treat a sale as exempt by mistake, and vendors who simply leave the tax off. Each time, the obligation moves to the buyer. That is the part AP sees, because it holds the only record of what was charged. Use tax is usually found the hard way. A state auditor samples a few months of purchase invoices, finds taxable purchases with no tax charged and no accrual, and projects that error rate across the whole audit period, with interest and sometimes penalties. A small monthly accrual is much cheaper than a projected assessment covering three or four years. 4 facts from each invoice the use tax decision needs, listed below 2 lines in a use tax journal entry: cost and liability 6 steps in the monthly routine at the end of this post ## Why accounts payable is the checkpoint Every purchase that could carry use tax ends up as a vendor invoice, and every vendor invoice goes through AP. Purchasing knows what was ordered but not what tax was billed; tax knows the rules but sees invoices only at audit time. AP is the one team that has the document showing the tax line, the ship-to address and the items together, at the moment the purchase is booked. That does not mean AP clerks should become tax specialists. The goal is narrower: flag the invoices that need a decision, apply the rules the tax team has set, and book the result. Most invoices pass straight through, either because the vendor charged tax or because the vendor and item are already known to be exempt. The review is for the rest. _Illustrative split of a month of vendor invoices by sales and use tax outcome, as a share of invoices. Numbers are examples, not measured results._ The highlighted bucket is small, which is exactly why it is missed. It hides among invoices that are correctly untaxed, and telling them apart takes more than the total. A blanket rule, such as accruing on every zero-tax invoice or on none, gets it wrong in one direction or the other. ## The four facts the decision needs Whether use tax is owed on an invoice comes down to four facts, all of which are on the invoice or tied to it through the vendor and the order. ### What was bought Tangible goods are taxable in most states; many services are not, and some are. Software, maintenance contracts and installation charges are treated differently from state to state. The decision is made line by line, not per invoice: one invoice can mix a taxable machine with a non-taxable service, as in the example below. ### Where it was shipped Use tax is owed where the item is used, and the rate usually depends on the ship-to address, not the vendor's address or your billing address. States with local taxes add county and city rates on top. An invoice that only shows a bill-to address needs the order or the receipt to supply the delivery location. ### What tax the vendor charged Zero is the obvious case, but not the only one. A vendor can charge tax at another state's rate, or at the state rate without the local portion. The shortfall between what was charged and what was due is owed as use tax, so the tax amount and the taxable base both need to be read, not only whether a tax line exists. ### Whether an exemption applies Goods bought for resale, items used directly in manufacturing in many states, and purchases by exempt organizations can all be untaxed legitimately. The exemption only holds when a certificate is on file with the vendor. A zero-tax invoice from a vendor with no certificate on record is a candidate for use tax, not proof of an exemption. Decide by line and by ship-to address Use tax is decided per line item at the rate where the item is delivered. Reviewing only the invoice total and the vendor's state is how a taxable machine and a non-taxable service on one invoice end up treated the same. ## Reading the invoice into fields To do the review at volume, each invoice needs those facts as separate fields: vendor and vendor state, PO number, ship-to address, each line with its description and amount, freight, sales tax charged and the invoice total. Define them once in your [extraction schema](https://parserai.co/blog/extraction-schema-design-field-types-versioning), and a rule engine, a spreadsheet or your ERP's tax module can apply the tax team's rules to them. use-tax-review.json — example invoice with no sales tax, reviewed for use tax ``` { "invoice": { "vendor_name": "Example Lab Supply Inc.", "vendor_state": "OR", "invoice_number": "INV-77214", "invoice_date": "2026-10-06", "po_number": "PO-31602", "ship_to": { "city": "Columbus", "state": "OH", "postal_code": "43215" }, "lines": [ { "description": "Benchtop centrifuge", "quantity": 1, "unit_price": 4200.00, "amount": 4200.00 }, { "description": "Annual calibration service", "quantity": 1, "unit_price": 600.00, "amount": 600.00 } ], "freight": 150.00, "sales_tax": 0.00, "invoice_total": 4950.00 }, "review": { "tax_charged": 0.00, "exemption_certificate_on_file": false, "lines_flagged_for_use_tax": ["Benchtop centrifuge"], "rate_source": "ship-to address", "decision": "accrue use tax on taxable lines at the ship-to rate" } } ``` In this example an out-of-state vendor ships a benchtop centrifuge and a calibration service to an Ohio lab and charges no tax. No exemption certificate is on file. The tax team's rules say the equipment is taxable and the calibration service is not, so use tax is accrued on the 4,200.00 equipment line at the rate for the ship-to address. Whether freight is taxable depends on the state and on how it is billed, so it follows its own rule. The vendor is paid 4,950.00, the invoice amount, and the use tax goes to a liability, not to the vendor. The same fields catch the opposite error. When a vendor charges tax on a line that should be exempt, the review flags an overpayment to recover from the vendor, which is cheaper to fix before payment than on a refund claim later. ## Booking the accrual The entry is the same shape every time. Debit the account the purchase was charged to, whether expense or a fixed asset, for the use tax amount, so the tax becomes part of the cost, just as it would have if the vendor had charged it. Credit a use tax payable liability. The payable to the vendor is unchanged. When the use tax return is filed, which in many states is on the same return as sales tax, the liability is cleared against cash. For a capital purchase, the tax belongs in the asset's cost basis and is depreciated with it, which links this review to the [capitalize or expense decision](https://parserai.co/blog/fixed-asset-register-capitalize-or-expense-vendor-invoice-bookkeeping-firm) made on the same invoice. Most ERPs can post the accrual automatically from a tax code on the line; the work is in assigning the right code before the invoice is posted. ## A monthly use tax routine - Extract every vendor invoice with ship-to address, line items, freight and sales tax as separate fields. - Skip invoices where tax was charged at the ship-to rate, and vendors or items already marked exempt with a certificate on file. - Flag the rest: zero tax, tax at another state's rate, or tax on only part of the taxable base. - Apply the tax team's taxability rules line by line, at the rate for the ship-to address. - Post the use tax to the purchase's account and to use tax payable; pay the vendor the invoice amount only. - Reconcile the use tax payable balance to the return before filing, and keep the invoice behind each accrual. The review sits naturally next to the [three-way match](https://parserai.co/blog/three-way-match-exceptions-po-receipt-invoice-accounts-payable): the receipt confirms where the item was delivered, and the order often states whether it was for resale. A vendor that keeps leaving tax off will also show up in the month-end [GRNI accrual](https://parserai.co/blog/grni-accrual-received-not-invoiced-month-end-accounts-payable) for goods received before the invoice, where the same question will come back when the invoice arrives. ## Where extraction fits Use tax review is a reading problem before it is a tax problem: finding the ship-to address, separating taxable lines from service lines, and reading the tax charged against the base it was charged on. Done by hand, it is skipped whenever the month is busy. Parser extracts each [invoice](https://parserai.co/solutions) into structured JSON against the fields you define in a template, including the ship-to address, every line, the freight and the tax charged, through upload, e-mail or the [API](https://parserai.co/api-docs). Your ERP or tax engine then applies the rules and posts the accrual, with the source invoice behind every line. Accounts Payable ## Bring a real invoice. An invoice parser for accounts payable: invoices and bills arrive by upload, e-mail or API, and the fields you define are extracted and checked against your validation rules before they reach your system. [Book a demo](https://parserai.co/demo?icp=ap) ## FAQ ### What is use tax? Use tax is the counterpart of sales tax in most US states that levy one. When you buy taxable goods or services and the seller does not collect sales tax, you owe use tax on the purchase to the state where the item is used, generally at the same rate the sales tax would have been. Rules, rates and exemptions vary by state. ### Who is responsible for use tax, the vendor or the buyer? If the vendor is required to collect sales tax and does, the buyer owes nothing more. If the vendor does not collect it on a taxable purchase, for example because it is not registered in your state, the buyer is generally responsible for self-assessing use tax and paying it to the state. ### How do you record a use tax accrual? Debit the same expense or asset account as the purchase for the use tax amount, so the tax becomes part of the cost, and credit a use tax payable liability. The vendor is paid the invoice amount only. When the use tax return is filed, debit the liability and credit cash. ### Does an invoice with zero sales tax always mean use tax is owed? No. The purchase may be exempt, for example goods bought for resale with a valid resale certificate on file, or the item may not be taxable in that state, such as many services. The point is to review every zero-tax invoice and record the decision, not to accrue tax on all of them.