What is the Kentucky economic nexus threshold in 2026?

For 2026, Kentucky's economic nexus threshold is $100,000 in gross sales OR 200 transactions, in effect since 2018-10-01. That dollar figure is only half the rule: the measurement base it applies to and the lookback window it is measured over are set separately by Kentucky and are published by the Kentucky Department of Revenue.

What is the current Kentucky economic nexus threshold?

$100,000 in gross sales OR 200 transactions, effective since 2018-10-01. Sales you make through a marketplace facilitator are excluded from a seller's own threshold count in many states, but that exclusion is a per-state rule rather than a national one — confirm it for Kentucky before you remove marketplace revenue from your tracking.

What counts toward the Kentucky threshold?

It depends on the measurement base Kentucky chose, and states differ. Some count total combined sales of tangible personal property including nontaxable sales (California's $500,000 test works this way), some count only retail sales, and some count only taxable sales (Florida's remote-seller test works this way). Read the base off the Kentucky Department of Revenue's own guidance rather than assuming gross revenue.

What lookback period does Kentucky use for economic nexus?

Lookback windows are not uniform across US states, and four different patterns are in use: a rolling preceding 12 calendar months (Texas), the preceding or current calendar year (California), the immediately preceding four sales tax quarters (New York), and the previous calendar year only (Florida). Because the window decides when you cross on identical revenue, confirm Kentucky's window with the Kentucky Department of Revenue instead of applying a generic rolling-12-month rule.

When do I have to register after crossing the Kentucky threshold?

Registration deadlines after crossing are set by each state separately and are not uniform, so Kentucky's exact date is one to confirm with the Kentucky Department of Revenue. What is consistent across states is the direction of the risk: back-tax exposure accrues on sales made after you crossed, so the cost of registering late grows with every KY order you ship.

Kentucky Sales Tax Economic Nexus Threshold (2026)

Updated 2026-07-20

Reviewed by Nexus by State research team using official state tax sources. Last reviewed 2026-07-20.

Guide content last reviewed: 2026-07-20

If your Thresholds business sells $100,000 or 200 transactions into Kentucky in a calendar year, you have economic nexus and must register, collect, and remit Kentucky sales tax.

Kentucky's economic nexus threshold, in detail

The current Kentucky threshold is $100,000 or 200 transactions, in effect since 2018-10-01.

A threshold is two numbers, not one: the dollar figure above, and the measurement base it is applied to. States do not use the same base — some count total combined sales of tangible personal property including nontaxable sales, some count only retail sales, and some count only taxable sales. That choice can move you across the line months earlier or later on identical revenue, and it is published by the state, not inferable from the dollar amount. Confirm Kentucky’s base with the Kentucky Department of Revenue before you compute. Sales made through a marketplace facilitator are excluded from the seller’s own count in many states but not all — that too is a per-state rule.

Lookback periods: the four patterns states actually use

There is no single national lookback period. Four distinct patterns are in use, and each is written into that state’s own guidance — this site does not publish a lookback period for Kentucky because a wrong window would put you on the wrong side of the line. These four official examples show how far apart the patterns sit:

Preceding 12 calendar months (rolling). Texas: “total Texas revenue greater than $500,000 in the preceding 12 calendar months” — Texas Comptroller publication 94-108, date_retrieved: 2026-07-20.
Preceding OR current calendar year. California: $500,000 in total combined sales of tangible personal property for delivery in California “during the preceding or current calendar year” — so a mid-year surge triggers registration in that same year. CDTFA Wayfair guidance, date_retrieved: 2026-07-20.
Immediately preceding four sales tax quarters. New York: gross receipts over $500,000 and more than 100 sales of tangible personal property delivered into the state, measured across the four preceding sales tax quarters rather than a calendar year — NYS Department of Taxation and Finance, date_retrieved: 2026-07-20.
Previous calendar year only. Florida: taxable remote Florida sales over $100,000 in the previous calendar year, with no transaction-count test — Florida DOR registration guidance, date_retrieved: 2026-06-09.

Registration deadlines after you cross are set separately by each state and are not uniform — confirm both the Kentucky lookback window and the date collection must begin with the Kentucky Department of Revenue.

Common threshold-tracking mistakes

Assuming one lookback window across every state. A seller who tracks all 50 states on a calendar year misses the rolling and four-quarter states entirely, and a seller who tracks everything on a rolling 12 months registers early in the previous-calendar-year states.
Applying the wrong measurement base — counting only taxable sales in a state whose test is total combined sales, or the reverse. Read the base off the state’s own guidance before you build the spreadsheet.
Including collected tax in “gross sales”. The threshold uses pre-tax revenue; double-counting tax in the threshold figure can prematurely trigger registration.
Assuming that falling below the threshold ends the obligation. Once you hold a permit the filing duty attaches to the permit, and whether (and when) you may close the account is a Kentucky DOR determination, not an automatic reset.

Kentucky nexus note

Kentucky sales tax nexus and economic nexus threshold: through July 31, 2026, a remote retailer must register and collect Kentucky sales tax once it has $100,000 or more in gross receipts from sales into Kentucky OR 200 or more separate sales into Kentucky in the previous or current calendar year — meeting either test triggers the requirement (Kentucky Department of Revenue Wayfair guidance, HB 487; collections required beginning October 1, 2018). Effective August 1, 2026, House Bill 757 (2026 Regular Session, enacted over the Governor's veto) removes the 200-transaction test for both remote retailers and marketplace providers, leaving a $100,000 sales-only threshold that counts tangible personal property, digital property, and services delivered, transferred electronically, or provided to a Kentucky purchaser; sellers registered solely because of transaction volume should review whether they can deregister under Kentucky's trailing-nexus rules. Kentucky's marketplace facilitator law (HB 354) has been effective since July 1, 2019 — Amazon, Etsy, eBay, and Walmart collect and remit Kentucky sales tax on facilitated sales, registering once for all third-party sellers per KRS 139.450 (procedure clarified by HB 249, effective July 1, 2021). Kentucky levies a flat 6% statewide sales tax with no local sales taxes, so the rate is identical at every Kentucky delivery address. HB 757 also extends Kentucky sales and use tax to data brokering services beginning August 1, 2026. Direct-to-consumer sales outside any marketplace remain the seller's own collection responsibility once nexus is met.

What to do next

Read the full Kentucky overview for thresholds, filing frequency, marketplace facilitator rules, and registration links. Use the nexus calculator to check whether you have crossed the threshold. For background on the post-Wayfair economic nexus framework, see the pillar guide.

Thresholds sales tax in other states

Compare Kentucky's thresholds rules with nearby and similar states' thresholds sales tax guides:

Frequently asked questions

What is the Kentucky economic nexus threshold in 2026?: For 2026, Kentucky's economic nexus threshold is $100,000 in gross sales OR 200 transactions, in effect since 2018-10-01. That dollar figure is only half the rule: the measurement base it applies to and the lookback window it is measured over are set separately by Kentucky and are published by the Kentucky Department of Revenue.
What is the current Kentucky economic nexus threshold?: $100,000 in gross sales OR 200 transactions, effective since 2018-10-01. Sales you make through a marketplace facilitator are excluded from a seller's own threshold count in many states, but that exclusion is a per-state rule rather than a national one — confirm it for Kentucky before you remove marketplace revenue from your tracking.
What counts toward the Kentucky threshold?: It depends on the measurement base Kentucky chose, and states differ. Some count total combined sales of tangible personal property including nontaxable sales (California's $500,000 test works this way), some count only retail sales, and some count only taxable sales (Florida's remote-seller test works this way). Read the base off the Kentucky Department of Revenue's own guidance rather than assuming gross revenue.
What lookback period does Kentucky use for economic nexus?: Lookback windows are not uniform across US states, and four different patterns are in use: a rolling preceding 12 calendar months (Texas), the preceding or current calendar year (California), the immediately preceding four sales tax quarters (New York), and the previous calendar year only (Florida). Because the window decides when you cross on identical revenue, confirm Kentucky's window with the Kentucky Department of Revenue instead of applying a generic rolling-12-month rule.
When do I have to register after crossing the Kentucky threshold?: Registration deadlines after crossing are set by each state separately and are not uniform, so Kentucky's exact date is one to confirm with the Kentucky Department of Revenue. What is consistent across states is the direction of the risk: back-tax exposure accrues on sales made after you crossed, so the cost of registering late grows with every KY order you ship.

Sources

date_retrieved: 2026-05-24