Key takeaways
- Wisconsin sales tax rates: The statewide rate is 5%, and most counties add 0.5% for about 5%–5.6% combined. Milwaukee is the exception at roughly 7.9% since January 1, 2024.
- Economic nexus: Remote sellers must collect once gross sales into Wisconsin exceed $100,000 in the previous or current calendar year. The 200-transaction threshold was removed in 2021, so the test is the dollar amount only.
- Filing & penalties: Most returns are due on the last day of the month after the period. Late filing brings a $20 fee plus a negligence penalty of 5% per month, up to 25%.
Wisconsin sales tax key facts (2026)
| Item | Wisconsin |
|---|---|
| Statewide rate | 5% |
| Combined rate range | 5%–5.6% (Milwaukee ~7.9%) |
| Economic nexus threshold | $100,000 (no transaction count) |
| Sourcing | Destination-based |
Collect and file Wisconsin sales tax with Taxually: LumaTax monitors your nexus, registers you and files your returns.
Is SaaS taxable?
No.
| Item | Wisconsin |
|---|---|
| Groceries | Exempt (candy/soda/prepared food taxable) |
| Registration fee | $20 (initial) |
| Return due date | Last day of the month after the period |
| Governing agency | Wisconsin Department of Revenue |
What is the sales tax rate in Wisconsin?
Wisconsin’s statewide sales tax rate is 5%. Most counties add a 0.5% county tax, bringing combined rates to about 5%–5.6%. The major exception is Milwaukee: since January 1, 2024, the City of Milwaukee (2%) and Milwaukee County (0.9%) levy higher local taxes, taking the combined rate there to roughly 7.9%. Use the Wisconsin rate lookup for exact rates.
Do you have sales tax nexus in Wisconsin?
Nexus is the connection that obligates your business to collect and remit Wisconsin sales tax. You can establish it two ways — physically or economically. Either one is enough.
Physical nexus
You have physical nexus if you have a tangible presence in Wisconsin, such as:
- A physical location, such as a warehouse or distribution center
- Employees, contractors, or representatives in the state
- Owning real or personal property in the state
- Delivering goods using your own vehicles
Economic nexus
Out-of-state sellers establish economic nexus once gross sales into Wisconsin exceed $100,000 in the previous or current calendar year. Wisconsin removed its 200-transaction threshold (effective February 20, 2021), so the test is the dollar amount only.
What is taxable in Wisconsin?
Most tangible personal property is taxable, with exceptions including burial caskets, certain groceries, prescription medicine and medical devices, modular/manufactured homes, and agricultural and manufacturing equipment. Some services are taxable, especially those producing or manufacturing tangible goods.
Is SaaS taxable in Wisconsin?
No. Wisconsin does not tax SaaS. (Downloaded prewritten software is taxable, but remotely accessed software is not.)
How is food taxed in Wisconsin?
Most groceries sold in grocery stores are exempt. Candy, soft drinks, and prepared foods are taxed at the full rate.
How to register for a Wisconsin sales tax permit
Obtain a seller’s permit before collecting. Taxually can register for you, or you can apply online through Wisconsin Business Tax Registration or by mailing Form BTR-101. The initial registration fee is $20.
Have ready: your reason for applying, basic business details, business structure, type of business, your collection start date, and information about other owners.
How to collect sales tax in Wisconsin
Wisconsin is destination-based — collect at the rate for the buyer’s location (including Milwaukee’s higher rate where applicable), whether you’re in-state or remote.
Filing and paying Wisconsin sales tax
The Department assigns frequency by liability: early monthly ($3,601+/quarter, due the 20th), monthly ($1,201–$3,600/quarter), quarterly ($601–$1,200/quarter), or annual ($600 or less/year). Most returns are due the last day of the month following the period.
File and pay through My Tax Account or by mail using Form ST-12. Taxually’s software automates the full process.
Penalties for late or non-compliant filing
Failing to file or pay on time triggers these penalties:
- Late filing fee: $20.
- Negligence penalty: 5% of the tax due per month the return is late, up to 25%.
- Interest accrues on unpaid tax at the current rate.
Frequently asked questions
What is the sales tax rate in Wisconsin in 2026?
The state rate is 5%, with most counties at 5%–5.6%. Milwaukee is higher (about 7.9%) following 2024 local tax changes.
What is the economic nexus threshold for Wisconsin?
$100,000 in gross sales into Wisconsin in the previous or current calendar year. The 200-transaction threshold was removed in 2021.
Is SaaS taxable in Wisconsin?
No. Wisconsin does not tax SaaS. Downloaded prewritten software is taxable.
Are groceries taxed in Wisconsin?
No, most groceries are exempt. Candy, soft drinks, and prepared food are taxable.
When are Wisconsin sales tax returns due?
The last day of the month following your reporting period (early monthly filers by the 20th).
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