How does Tennessee's single article tax and local option cap apply to sales of high-value equipment?

The three layers and where each one stops

The state sales tax is levied on the sales price of tangible personal property sold at retail at the rate of 7 percent (Tenn. Code Ann. § 67-6-202(a)). The same subsection levies "an additional tax at the rate of two and three-quarters percent (2.75%) on the amount in excess of one thousand six hundred dollars ($1,600), but less than or equal to three thousand two hundred dollars ($3,200)" on the sale or use of any single article of personal property as defined in § 67-6-702(d). The use tax borrows the same rate structure by reference (Tenn. Code Ann. § 67-6-203(a)).

Counties and incorporated cities may levy a local sales and use tax on the same privileges the state taxes, at a rate not exceeding 2.75 percent, and the statute provides that "the tax levied shall apply only to the first one thousand six hundred dollars ($1,600) on the sale or use of any single article of personal property" (Tenn. Code Ann. § 67-6-702(a)(1)(A)). The cap is a limit on the base, not on the tax: whatever the local rate, it is applied to $1,600 and stops.

The Department of Revenue states the same result (SUT-6, "Single Article Tax: Overview and Application"; Sales and Use Tax Manual (Aug. 2026), pp. 105 to 107). The statute contemplates older local limits of $5 or $7.50 of tax per article that stand until the jurisdiction removes them (Tenn. Code Ann. § 67-6-702(a)(2)), and two counties keep a lower base: Hamblen County's local base is $300 (except the city of Morristown, which uses $1,600) and Hancock County's is $375 (Sales and Use Tax Manual (Aug. 2026), pp. 105 to 106). The county's base should be confirmed on the Department's local rate chart.

Most errors come from the flat combined rate, 9.25 percent in a county with a 2.25 percent local rate and no city levy, applied to the invoice total: right for a $900 item, wrong for a $10,000 unit.

What counts as one article

The statute defines the term. A "single article" is "that which is regarded by common understanding as a separate unit exclusive of any accessories, extra parts, etc.," and that which is capable of being sold as an independent unit or as a common unit of measure, a regular billing, or other obligation (Tenn. Code Ann. § 67-6-702(d)). The same subsection then adds the sentence that decides most equipment questions: "Such independent units sold in sets, lots, suites, etc., at a single price shall not be considered a single article."

Three consequences follow. First, the cap is applied per article, not per invoice: an invoice for twenty units is twenty single articles, each with its own local base and band. The manual states that the local limitation "does not apply to a single invoice total when multiple items of tangible personal property are included on the invoice" (Sales and Use Tax Manual (Aug. 2026), p. 105), and for a tractor sold with implements the two single article computations "are not calculated on a total invoice amount for multiple articles of tangible personal property" (SUT-108). Second, accessories and extra parts are outside the article; a spare sold with a machine is taxed on its own footing, and one priced under $1,600 carries full local tax. Third, and least intuitive, independently saleable units sold together for one lump price are not a single article at all; the manual repeats that "[i]ndependent units sold in sets, lots, suites, or other such groupings are not considered to be single articles" (Sales and Use Tax Manual (Aug. 2026), p. 105). No cap applies and the local rate runs on the whole price.

In Letter Ruling #08-17 (February 29, 2008), a software vendor sold core applications with optional components for one negotiated price without itemizing the components. The Department ruled that the products were not single articles, so the entire price was subject to the local option tax and the state single article tax did not apply, and it noted that itemized components would each have been a single article. Letter Ruling #11-34 (July 21, 2011) reached the same result on similar facts. Both rulings rely on Colemill Enterprises, Inc. v. Huddleston, No. 01-A-01-9605-CH-00218 (Tenn. Ct. App. Dec. 4, 1996), rev'd on other grounds, 967 S.W.2d 753 (Tenn. 1998), where the Court of Appeals held that the parts installed in an aircraft conversion were each single articles, that the installation labor was outside the cap altogether, and that, because the taxpayer had not itemized parts and labor, the Commissioner could not separate the capped charges from the uncapped ones. The Supreme Court reversed, holding that neither transaction was taxable and finding it unnecessary to address the other issues, so the single article discussion is persuasive rather than binding, but the Department continues to rely on it. Its view that an engine keeps its separate identity when bolted into a larger machine is the reasoning a seller of assembled equipment should expect to meet.

The manual's lease example shows how much the invoice decides. An MRI machine leased to a hospital is a single article if the vendor lists it separately from any software or extras and it could be leased without them; if the vendor charges one price for the entire rental, the machine is not a single unit, the cap does not apply, and the entire rental is subject to local option tax (Sales and Use Tax Manual (Aug. 2026), p. 108, citing Finalco, Inc. v. Taylor, 1994 WL 48986 (Tenn. Ct. App. Feb. 16, 1994)). The same machine is capped or uncapped depending on how the vendor wrote the invoice.

The statute makes an express exception for three categories only: parts and accessories installed on a motor vehicle before sale or included in its price are part of the vehicle unit; boat motors, parts, accessories, freight, and labor (but not trailers) are part of the boat unit; and items and services sold with a manufactured home are part of the home unit (Tenn. Code Ann. § 67-6-702(d)). Industrial equipment has no parallel sentence. A packaged or skid-mounted assembly with installed components, sold as one unit at one price, has to be defended on the general "common understanding as a separate unit" test, and #08-17 hands an examiner the argument that it is a set of independent units sold at a single price. Where the components are separately saleable, itemizing them lets the cap apply to each; where the unit is one product no one would buy in pieces, the documentation should say so.

Standalone taxable services, amusements, custom software, warranty and maintenance contracts, and specified digital products do not receive single article treatment: their full price is subject to local tax and not to the state single article tax (SUT-6; Sales and Use Tax Manual (Aug. 2026), p. 105), with specified digital products taxed locally at a fixed 2.5 percent (Tenn. Code Ann. § 67-6-702(f)(4)).

Delivery, installation, freight, and trade-ins

The cap and the band are measured against the article's sales price, a defined term that includes the seller's cost, labor, delivery charges, and installation charges, less discounts, separately stated interest, separately stated taxes imposed on the consumer, and a separately stated trade-in credit (Tenn. Code Ann. § 67-6-102(92)). The Department's training material lists delivery and installation charges in a single article's price (Single Article Tax webinar, October 2022), and for boats the statute and manual fold in dealer-installed parts, freight, labor, and delivery (Tenn. Code Ann. § 67-6-702(d); Sales and Use Tax Manual (Aug. 2026), p. 109).

Colemill treated conversion labor as an installation service separate from the parts. Under the current definition, a seller's delivery and installation charges for the article it sells count toward the cap and the band (Tenn. Code Ann. § 67-6-102(92)(A)(iv), (v)); labor to install parts in property the buyer already owns is a separate taxable service and is not capped.

A delivery charge on a $10,000 unit raises that unit's sales price, but since the unit is already above $3,200, the added charge draws only the 7 percent state rate. Where a used article is taken in trade on a new or used article, the tax is paid on the net difference (Tenn. Code Ann. § 67-6-510(a)), so a separately stated trade-in credit reduces the sales price before the thresholds are applied: a $4,000 machine sold against a $1,500 trade-in has a $2,500 sales price and a $900 single article band.

The worked computation

Assume a 2.25 percent county rate, no city rate, and one unit sold for $10,000. The invoice carries three tax lines:

State sales tax, 7 percent of $10,000: $700.00. Local option tax, 2.25 percent of $1,600: $36.00. State single article tax, 2.75 percent of $1,600 (the band from $1,600.01 to $3,200): $44.00. Total tax: $780.00, an effective rate of 7.80 percent.

Three wrong answers recur. A flat 9.25 percent on $10,000 is $925.00, a net over-collection of $145.00 per unit. State tax plus local tax on the first $1,600, with the single article tax omitted, is $736.00, an under-collection of $44.00. A flat 9.25 percent on the full price with the single article tax added on top is $969.00, an over-collection of $189.00.

For a unit priced inside the band, say $2,500, the lines are $175.00 of state tax, $36.00 of local tax, and $24.75 of single article tax on the $900 above $1,600. At or below $1,600, the local rate applies to the full price and there is no single article tax. The Department's own generator examples follow the same computation (Sales and Use Tax Manual (Aug. 2026), p. 107).

A multi-unit sale is the per-unit computation repeated. Take ten units at $10,000 each ($100,000) and two hundred accessory units at $150 each ($30,000), sold on one invoice at itemized prices:

State sales tax, 7 percent of $130,000: $9,100.00. Local option tax, 2.25 percent of $46,000, being $1,600 for each of the ten units ($16,000) plus the full $30,000 of items priced under $1,600: $1,035.00. State single article tax, 2.75 percent of $16,000, being $1,600 for each of the ten units: $440.00. Total tax: $10,575.00.

A flat 9.25 percent on the $130,000 invoice would be $12,025.00, a net over-collection of $1,450.00 on one sale. On the return, the full taxable sales go into the state computation on page one of the SLS 450; Schedule B, line 4, "[e]xcess amount over single article tax base," backs the $84,000 of price above $1,600 on the ten units out of the local base; and Schedule C, line 1, "[t]axable single article sales from $1,600 to $3,200," takes the $16,000, with line 2 applying 2.75 percent (SLS 450, revision 01/26, and its instructions for periods beginning on or after January 1, 2026). Schedule B line 9 carries the local tax to line 10 of the first page, and Schedule C line 9 carries to line 12 (SLS 450, revision 01/26; see Sales and Use Tax Manual (Aug. 2026), pp. 106 to 107). The dealer may round return figures to the nearest dollar (Tenn. Code Ann. § 67-6-504(e)), so the invoice and the return will not match to the cent.

Who bears the consequence of getting it wrong

The dealer is the taxpayer. Every dealer making sales of tangible personal property for use or consumption in the state is liable for the tax, which is collected from the dealer (Tenn. Code Ann. § 67-6-501(a), (b)), and the dealer in turn collects it from the consumer "insofar as it can be done" (Tenn. Code Ann. § 67-6-502). Under-collection therefore lands on the seller first: the dealer is assessed for the shortfall with interest and any penalty, and recovery from the buyer is a commercial question. The buyer's own use tax liability under Tenn. Code Ann. § 67-6-203 survives a dealer's under-charge, though the statute bars duplication of tax already paid.

Over-collection is not the seller's to keep: when the tax collected for any period exceeds what the law provides, the total collected must be paid over to the Commissioner (Tenn. Code Ann. § 67-6-514). A seller that charged 9.25 percent on the whole price overpaid local tax and underpaid the single article tax: $189 over and $44 under on one $10,000 unit, $1,890 over and $440 under on the ten unit sale. A refund claim must be filed with the Commissioner, under penalties of perjury, within three years from December 31 of the year in which the payment was made, stating each ground, the amount, the period, and the tax type (Tenn. Code Ann. § 67-1-1802(a)(1)(A)). The dealer that remitted the tax may claim, but tax collected from or passed on to customers "shall not be refunded unless the taxpayer has refunded or credited the sales or use tax to its customers" (Tenn. Code Ann. § 67-1-1802(e)(4)). A customer may claim directly only after asking the dealer for a refund at least twice and being refused, with the dealer's attestation that it remitted the tax and will not claim it (or, absent an attestation, on a showing that the customer reasonably tried and the Commissioner can verify the remittance), and the direct claim must exceed $2,500 per dealer (Tenn. Code Ann. § 67-1-1802(e)(1)(B), (e)(1)(C), (e)(2)). Both illustrative over-collections sit under that floor, so the only path is the dealer crediting its customer and claiming the refund itself.

Registration and filing for a seller with sporadic sales

An occasional equipment sale is sometimes the seller's only taxable sale in a year, and the mechanics are the same as for a full-time retailer. A different rule governs a business disposing of its own used equipment: occasional and isolated sales by a person not regularly engaged in selling that property are outside "business" and not taxed, though occasional sales of aircraft, vessels, and motor vehicles generally remain taxable (Tenn. Code Ann. § 67-6-102(9)(B), (C); Sales and Use Tax Manual (Aug. 2026), pp. 234 to 235). Every person desiring to engage in business as a dealer must apply for a certificate of registration for each place of business (Tenn. Code Ann. § 67-6-601(a)), through the Department's online portal at no charge (SUT-10), before the sale is invoiced. Returns are due monthly by the twentieth of the following month (Tenn. Code Ann. § 67-6-504(a)), and the rule calls for a report for each month from every dealer with an active registration, "whether there have been any sales or purchases of any kind, or whether there is any sales and use tax due to be paid" (Tenn. Comp. R. & Regs. 1320-05-01-.74(1)). A registered seller with no sales in a month still files.

Dealers whose liability for twelve consecutive months has averaged $1,000 or less per month are authorized to file monthly or quarterly (Tenn. Code Ann. § 67-6-505(c)). The statute indexes that figure every five years beginning January 1, 2026, rounded to the nearest $10, but the Department has published no adjusted figure, and its August 2026 manual still states $1,000 (Sales and Use Tax Manual (Aug. 2026), p. 29). The Department's rule, last amended in 2016 and never conformed to the statutory figure, permits quarterly or annual filing "in the discretion of the Commissioner" at an average of $200 or less per month, allows a new dealer highly likely to qualify to file less often, and provides that if liability for any later twelve-month period exceeds $2,400 the Commissioner may require monthly filing again (Tenn. Comp. R. & Regs. 1320-05-01-.74(2)(a), (b), (c)). The manual says annual filing "[g]enerally" applies only to manufacturers, wholesalers, and certain marketplace sellers (Sales and Use Tax Manual (Aug. 2026), p. 29), but nothing in the statute or rule imposes that limit; the request goes in writing, citing § 67-6-505(c) and the rule.

Practice notes

The computation runs per article, not per invoice, and items under $1,600 carry full local tax. Where equipment ships as an assembled unit with separately saleable components, the position (one article or several) should be decided before invoicing, with itemization where several is the honest answer; a lump sum for a set of independent units gets no cap at all under the Department's reading of § 67-6-702(d). The invoice's three tax lines should reconcile to page one, Schedule B line 4, and Schedule C lines 1 and 2 of the SLS 450. When over-collection is found, the dealer credits the customer and claims through its own account rather than leaving the customer to the $2,500 direct-claim route. G&G State Tax Group provides Tennessee sales and use tax computation review, invoicing design, and refund claim work for sellers of high-value equipment alongside its state and local tax practice.