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openaccountants/skills/wisconsin-sales-tax.md
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1---
2name: wisconsin-sales-tax
3description: Use this skill whenever asked about Wisconsin sales tax, Wisconsin use tax, Wisconsin sales tax nexus, Wisconsin sales tax returns, Wisconsin exemption certificates, taxability of goods or services in Wisconsin, or any request involving Wisconsin state-level consumption taxes. Trigger on phrases like "Wisconsin sales tax", "WI sales tax", "Wisconsin use tax", "Wisconsin nexus", "Wis. Stat. 77.51", "Wisconsin DOR sales tax", or any request involving Wisconsin sales and use tax filing, classification, or compliance. ALWAYS read the parent us-sales-tax skill first for federal context.
4---
5 
6# Wisconsin Sales and Use Tax Skill
7 
8---
9 
10## Skill Metadata
11| Field | Value |
12|-------|-------|
13| Jurisdiction | Wisconsin, United States |
14| Jurisdiction Code | US-WI |
15| Tax Type | Sales and Use Tax |
16| State Tax Rate | 5% |
17| County Tax | 0.5% (all counties authorized; most levy it) |
18| Maximum Combined Rate | 5.5% (5% state + 0.5% county) |
19| Primary Legal Framework | Wisconsin Statutes (Wis. Stat.) Chapter 77, Subchapter III (Section 77.51 et seq.) |
20| Governing Body | Wisconsin Department of Revenue (WDOR) |
21| Filing Portal | My Tax Account -- https://tap.revenue.wi.gov |
22| Economic Nexus Effective Date | October 1, 2018 |
23| SST Member | Yes (full member) |
24| Contributor | Open Accounting Skills Registry |
25| Validated By | Pending -- requires US CPA or Enrolled Agent sign-off |
26| Validation Date | Pending |
27| Skill Version | 1.0 |
28| Confidence Coverage | Tier 1: rate lookups, basic nexus, standard taxability. Tier 2: SaaS classification, service taxability, manufacturing exemptions. Tier 3: audit defense, penalty abatement, complex bundled transactions. |
29| Format | Restructured to Q1 execution format, April 2026 |
30 
31---
32 
33## Confidence Tier Definitions
34Every rule in this skill is tagged with a confidence tier:
35 
36- **[T1] Tier 1 -- Deterministic.** Apply exactly as written. No reviewer judgement required.
37- **[T2] Tier 2 -- Reviewer Judgement Required.** Claude flags the issue and presents options. A licensed CPA, EA, or tax attorney must confirm before filing.
38- **[T3] Tier 3 -- Out of Scope / Escalate.** Do not guess. Escalate to a licensed tax professional.
39 
40---
41 
42## Step 0: Client Onboarding Questions
43 
44Before proceeding with any Wisconsin sales tax analysis, collect the following from the client: [T1]
45 
46| # | Question | Why It Matters |
47|---|----------|---------------|
48| 1 | Do you have a Wisconsin sales tax registration / tax ID? | Determines whether registration is needed before filing. |
49| 2 | What is your current filing frequency (monthly / quarterly / annually)? | Controls which return periods to prepare. |
50| 3 | What is your nexus type -- physical presence, economic nexus, or both? | Determines registration obligations and applicable rules. |
51| 4 | Are you a marketplace seller (selling through Amazon, Etsy, etc.)? | Marketplace facilitator may already be collecting on your behalf. |
52| 5 | What types of products or services do you sell in Wisconsin? | Drives taxability classification under Wisconsin law. |
53| 6 | Do you sell to exempt entities (government, nonprofits, resellers)? | Determines whether exemption certificates must be collected and retained. |
54| 7 | Do you have locations, employees, or inventory in Wisconsin? | Physical presence creates nexus independent of economic thresholds. |
55| 8 | Do you sell into multiple Wisconsin local jurisdictions? | Local tax rates vary; determines compliance complexity. |
56 
57**If the client cannot answer questions 1-4, STOP and gather this information before proceeding.** [T1]
58 
59---
60 
61## Step 1: Tax Rate Structure
62### 1.1 State Rate
63 
64Wisconsin imposes a **5% state sales tax**. This is a moderate rate among US states.
65 
66**Statutory authority:** Wis. Stat. Section 77.52(1).
67 
68### 1.2 County Tax
69 
70Wisconsin counties are authorized to impose a **0.5% county sales tax**:
71 
72- All 72 counties in Wisconsin are authorized to levy the 0.5% county tax. [T1]
73- **Most counties** levy the tax (as of current data, 68 of 72 counties impose the 0.5% county tax). [T1]
74- There are **no city or special district** sales taxes in Wisconsin. [T1]
75 
76**Maximum combined rate:** 5% state + 0.5% county = **5.5%**. [T1]
77 
78**Counties without the 0.5% tax** (verify current status): A small number of counties do not levy the county option tax. Check WDOR's current county tax list. [T2]
79 
80### 1.3 Stadium Tax (Expired)
81 
82The former 0.1% Miller Park/American Family Field stadium tax in the five-county Milwaukee area expired. However, a new 0.5% local tax for the Brewers stadium was enacted; verify current status for Milwaukee-area counties. [T2]
83 
84### 1.4 Sourcing Rules [T1]
85 
86Wisconsin follows **SST destination-based** sourcing:
87 
88- **Shipped/delivered goods:** Destination (ship-to address). [T1]
89- **Over-the-counter:** Seller's location. [T1]
90- **Digital goods:** Buyer's address. [T1]
91 
92---
93 
94## Step 2: Transaction Classification Rules
95### 2.1 General Rule
96 
97Wisconsin sales tax applies to the retail sale of tangible personal property, certain services, and certain digital goods. Wis. Stat. Section 77.52.
98 
99### 2.2 Taxability Matrix
100 
101| Item Category | Taxable? | Rate | Authority | Tier |
102|---------------|----------|------|-----------|------|
103| General tangible personal property | Yes | Full rate | Wis. Stat. Section 77.52(1) | [T1] |
104| Grocery food (food for home consumption) | **Exempt** | 0% | Wis. Stat. Section 77.54(20n) | [T1] |
105| Prepared food (restaurant meals) | Yes | Full rate | Wis. Stat. Section 77.51(10m) | [T1] |
106| Clothing and footwear | Yes | Full rate | No exemption | [T1] |
107| Prescription drugs | Exempt | 0% | Wis. Stat. Section 77.54(14) | [T1] |
108| Over-the-counter drugs | Exempt | 0% | Wis. Stat. Section 77.54(14m) | [T1] |
109| Durable medical equipment | Exempt (with prescription) | 0% | Wis. Stat. Section 77.54(22) | [T1] |
110| Motor vehicles | Yes | Full rate (5% + county 0.5%) | Wis. Stat. Section 77.52 | [T1] |
111| Gasoline and motor fuel | Exempt from sales tax (motor fuel tax) | N/A | Wis. Stat. Section 77.54(11) | [T1] |
112| Utilities (residential -- electricity, gas) | Exempt | 0% | Wis. Stat. Section 77.54(30) | [T1] |
113| Utilities (commercial) | Yes | Full rate | Wis. Stat. Section 77.52 | [T1] |
114| Manufacturing equipment (direct use) | Exempt | 0% | Wis. Stat. Section 77.54(6)(am) | [T2] |
115| Agricultural supplies and equipment | Exempt | 0% | Wis. Stat. Section 77.54(3) | [T1] |
116| Software -- canned (tangible medium) | Yes | Full rate | Wis. Stat. Section 77.52(1) | [T1] |
117| Software -- canned (electronic delivery) | Yes | Full rate | WDOR guidance | [T1] |
118| Software -- custom | Exempt | 0% | Wis. Stat. Section 77.52(1)(a) | [T2] |
119| SaaS (Software as a Service) | **Not taxable** | 0% | WDOR -- not tangible personal property | [T2] |
120| Digital goods (downloads) | Yes (specified digital goods) | Full rate | Wis. Stat. Section 77.52(1)(d) | [T1] |
121| Data processing services | Not taxable | 0% | Not enumerated | [T2] |
122| Newspapers (print) | Exempt | 0% | Wis. Stat. Section 77.54(15) | [T1] |
123 
124### 2.3 Grocery Food Exemption [T1]
125 
126Wisconsin fully exempts food and food ingredients for home consumption:
127 
128- Follows SST definition of food (Wisconsin is an SST member). [T1]
129- **Candy** is taxable (excluded from food under SST). [T1]
130- **Soft drinks** are taxable (excluded from food under SST). [T1]
131- **Dietary supplements** are taxable. [T1]
132- **Prepared food** is taxable. [T1]
133 
134**Authority:** Wis. Stat. Section 77.54(20n).
135 
136### 2.4 SaaS -- Not Taxable [T2]
137 
138Wisconsin does **not** tax SaaS:
139 
140- WDOR has determined that SaaS is not the sale of tangible personal property or a taxable service. [T2]
141- The customer is accessing software on the vendor's server, not receiving a copy of software. [T2]
142- **Canned software** delivered electronically IS taxable, but SaaS is distinguished. [T2]
143- The line between "electronically delivered software" (taxable) and "SaaS" (not taxable) requires analysis of whether the customer receives a transferable copy. [T2]
144 
145### 2.5 Services Taxability [T2]
146 
147Wisconsin taxes certain enumerated services:
148 
149| Service | Taxable? | Authority |
150|---------|----------|-----------|
151| Telecommunications | Yes | Wis. Stat. Section 77.52(2)(a)5 |
152| Cable/satellite TV | Yes | Wis. Stat. Section 77.52(2)(a)5 |
153| Repair and maintenance of TPP | Parts: Yes; Labor: Not separately taxable if repair is not itemized | Wis. Stat. Section 77.52(2)(a)10 |
154| Hotel/lodging | Yes (plus local room taxes) | Wis. Stat. Section 77.52(2)(a)1 |
155| Laundry/dry cleaning | Yes | Wis. Stat. Section 77.52(2)(a)3 |
156| Parking (commercial) | Yes | Wis. Stat. Section 77.52(2)(a)4 |
157| Admissions/entertainment | Yes | Wis. Stat. Section 77.52(2)(a)2 |
158| Photography | Yes | Wis. Stat. Section 77.52(2)(a)7 |
159| Landscaping/lawn care | Yes | Wis. Stat. Section 77.52(2)(a)10 |
160| Professional services (legal, accounting) | No | Not enumerated |
161| Personal services (haircuts, spa) | No | Not enumerated |
162| Construction/real property | No (materials taxable at purchase) | WDOR guidance |
163| Transportation/freight | Exempt (if separately stated) | Wis. Stat. Section 77.52(18) |
164 
165---
166 
167## Step 3: Return Form Structure
168### 3.1 Registration
169 
170All sellers with nexus must register with WDOR for a **Seller's Permit**. Registration through My Tax Account portal.
171 
172**Fee:** $20 registration fee (one-time). [T1]
173 
174**Authority:** Wis. Stat. Section 77.52(7).
175 
176### 3.2 Filing Frequency
177 
178| Annual Tax Liability | Filing Frequency | Due Date |
179|----------------------|------------------|----------|
180| Over $3,600 per year | Monthly | Last day of the following month |
181| $1,200 -- $3,600 per year | Quarterly | Last day of month following quarter-end |
182| Under $1,200 per year | Annual | January 31 |
183 
184### 3.3 Returns and Payment
185 
186- **Form ST-12** (Wisconsin Sales and Use Tax Return) is the primary return. [T1]
187- Electronic filing through My Tax Account is required. [T1]
188- Payment due on the same date as the return. [T1]
189- County taxes are reported on the same return. [T1]
190 
191### 3.4 Vendor Discount
192 
193Wisconsin provides a **retailer's discount** for timely filing:
194 
195- **0.5%** of the tax due (both state and county), up to a maximum of **$1,000 per reporting period**. [T1]
196- Available only for timely filing and payment. [T1]
197 
198**Authority:** Wis. Stat. Section 77.61(4)(a).
199 
200### 3.5 Penalties and Interest
201 
202| Violation | Penalty | Authority |
203|-----------|---------|-----------|
204| Late filing | $20 or 5% of tax due, whichever is greater (per month, up to 25%) | Wis. Stat. Section 77.60(1) |
205| Late payment | 1% per month, up to 24% | Wis. Stat. Section 77.60(2) |
206| Failure to file | Estimated assessment + penalties | Wis. Stat. Section 77.59(2) |
207| Fraud | 100% of deficiency | Wis. Stat. Section 77.60(9) |
208| Interest | 12% per year (adjusted) | Wis. Stat. Section 77.60(1) |
209 
210---
211 
212## Step 4: Deductibility / Exemptions
213### 5.1 Wisconsin Exemption Certificates
214 
215| Certificate | Use Case | Authority |
216|-------------|----------|-----------|
217| **Form S-211** (Wisconsin Sales and Use Tax Exemption Certificate) | General exemption (resale, manufacturing, agricultural, government, nonprofit) | WDOR |
218| **Form S-211E** (Electronic version) | Same as S-211, electronic format | WDOR |
219| **SSTCE** (Streamlined certificate) | Multi-state purchases (Wisconsin is SST member) | SST Agreement |
220 
221### 5.2 Requirements [T1]
222 
223Valid certificates must include: purchaser information, seller's permit number (for resale), reason for exemption, description of goods, signature, date. [T1]
224 
225### 5.3 Good Faith and Retention [T1]
226 
227Good faith acceptance protects sellers. Certificates must be retained for **4 years** from the date of the last transaction. [T1]
228 
229---
230 
231 
232### 6.1 When Use Tax Applies
233 
234Wisconsin use tax applies when sales tax was not collected on items used, stored, or consumed in Wisconsin. [T1]
235 
236### 6.2 Use Tax Rate
237 
2385% state + 0.5% county (if applicable) = 5.5% maximum. [T1]
239 
240### 6.3 Use Tax Reporting
241 
242- **Businesses:** Report on Form ST-12. [T1]
243- **Individuals:** Report on Wisconsin income tax return (Form 1), Line 14. [T1]
244 
245---
246 
247## Step 5: Key Thresholds
248### 4.1 Physical Nexus
249 
250Standard physical nexus principles apply. [T1]
251 
252### 4.2 Economic Nexus [T1]
253 
254Wisconsin enacted economic nexus effective **October 1, 2018**.
255 
256| Threshold | Value | Measurement Period |
257|-----------|-------|--------------------|
258| Revenue | **$100,000** in gross sales into Wisconsin | Current or prior calendar year |
259| Transactions | N/A (revenue only) | |
260| Test | Revenue only -- no transaction count test | |
261 
262**Authority:** Wis. Stat. Section 77.53(9m).
263 
264**Note:** Wisconsin uses a revenue-only threshold. There is no transaction-count alternative. [T1]
265 
266### 4.3 Marketplace Facilitator Rules [T1]
267 
268Effective **January 1, 2020**:
269 
270- Marketplace facilitators meeting the nexus threshold must collect and remit. [T1]
271- Marketplace sellers relieved for facilitated sales. [T1]
272 
273**Authority:** Wis. Stat. Section 77.52(1m).
274 
275---
276 
277## Step 6: Filing Deadlines and Penalties
278 
279Refer to Step 3 for filing frequencies and due dates. [T1]
280 
281---
282 
283## PROHIBITIONS
2841. **NEVER** advise that Wisconsin has city or special district sales taxes (only state and county). [T1]
2852. **NEVER** advise that SaaS is taxable in Wisconsin (it is not). [T1]
2863. **NEVER** advise that grocery food is taxable in Wisconsin (it is exempt). [T1]
2874. **NEVER** advise that clothing is exempt in Wisconsin (it is taxable -- no clothing exemption). [T1]
2885. **NEVER** calculate a combined rate exceeding 5.5% (5% state + 0.5% county max). [T1]
2896. **NEVER** use a transaction-count threshold for Wisconsin economic nexus (revenue only, $100K). [T1]
2907. **NEVER** forget that landscaping services are taxable in Wisconsin. [T1]
2918. **NEVER** advise that Wisconsin is not an SST member (it is a full member). [T1]
2929. **NEVER** assume all counties levy the 0.5% tax without verifying. [T2]
29310. **NEVER** ignore the $20 seller's permit fee when advising on registration. [T1]
294 
295---
296 
297## Edge Case Registry
298 
299### 7.1 Manufacturing Exemption [T2]
300 
301Wisconsin provides a broad manufacturing exemption:
302 
303- Machinery and equipment used **exclusively and directly** in manufacturing are exempt. [T2]
304- "Manufacturing" includes processing, fabricating, and assembling. [T1]
305- The "exclusively and directly" standard is stricter than some states' "predominantly" test. [T2]
306- Dual-use equipment (manufacturing + non-manufacturing) may not qualify. [T2]
307 
308**Authority:** Wis. Stat. Section 77.54(6)(am).
309 
310### 7.2 Landscaping and Lawn Care [T1]
311 
312Wisconsin is somewhat unusual in that it taxes landscaping and lawn care services:
313 
314- Lawn mowing, snow removal, tree trimming: taxable. [T1]
315- Landscape design (intellectual services): generally not taxable. [T2]
316- Materials incorporated into landscaping: taxable. [T1]
317 
318### 7.3 Construction Contractors [T2]
319 
320- Contractors pay tax on materials at purchase. [T1]
321- Contractors do NOT collect sales tax on real property improvements. [T1]
322- Time and materials vs. lump sum contracts may be treated differently for certain items. [T2]
323 
324### 7.4 Trade-In Credits [T1]
325 
326Wisconsin allows trade-in credits:
327 
328- Trade-in of like-kind property reduces the taxable base. [T1]
329- Applies to motor vehicles, boats, aircraft, and other TPP. [T1]
330 
331**Authority:** Wis. Stat. Section 77.51(15b)(a).
332 
333### 7.5 Coin-Operated Amusement and Vending [T1]
334 
335- Coin-operated vending machine sales of food are taxable. [T1]
336- Coin-operated amusement devices: the operator pays use tax on the purchase; individual transactions by customers are not separately taxed. [T2]
337 
338### 7.6 Motor Vehicles and Boats [T1]
339 
340- Motor vehicles: taxable at 5% + county 0.5%. Tax paid at DMV registration. [T1]
341- Boats and personal watercraft: same rate, paid at registration with DNR. [T1]
342- Trade-in credits reduce the taxable base. [T1]
343- Casual sales between individuals: use tax applies. [T1]
344 
345### 7.7 Temporary Events and Craft Fairs [T1]
346 
347- Sellers at temporary events (craft fairs, festivals) must have a seller's permit. [T1]
348- Out-of-state sellers making sales at Wisconsin events establish physical nexus. [T1]
349- A **temporary seller's permit** is available for sellers at single events. [T1]
350 
351---
352 
353## Test Suite
354 
355### Test 1: Basic Rate Calculation [T1]
356 
357**Question:** A retailer in Dane County (0.5% county tax) sells a $500 computer. What is the total sales tax?
358 
359**Expected Answer:** $500 x (5% + 0.5%) = $500 x 5.5% = $27.50.
360 
361### Test 2: Grocery Food Exemption [T1]
362 
363**Question:** A grocery store sells $200 in produce and dairy, $10 in candy, and $8 in soft drinks. What tax is due?
364 
365**Expected Answer:** Produce/dairy: exempt ($0). Candy: $10 x 5.5% = $0.55. Soft drinks: $8 x 5.5% = $0.44. Total: $0.99.
366 
367### Test 3: SaaS Taxability [T2]
368 
369**Question:** A Wisconsin business subscribes to a $1,500/month SaaS HR platform. Is Wisconsin sales tax due?
370 
371**Expected Answer:** No. SaaS is not taxable in Wisconsin as it is not tangible personal property.
372 
373### Test 4: Clothing [T1]
374 
375**Question:** A customer buys a $300 jacket in Milwaukee. Is it taxable?
376 
377**Expected Answer:** Yes. Wisconsin does NOT exempt clothing. Tax = $300 x 5.5% = $16.50.
378 
379### Test 5: Economic Nexus [T1]
380 
381**Question:** An out-of-state seller made $80,000 in sales and 500 transactions in Wisconsin. Does the seller have nexus?
382 
383**Expected Answer:** No. Wisconsin uses a revenue-only threshold of $100,000. Transaction count is irrelevant.
384 
385### Test 6: Manufacturing Exemption [T2]
386 
387**Question:** A factory buys a $100,000 milling machine used exclusively in production. Is it exempt?
388 
389**Expected Answer:** Yes, if used exclusively and directly in manufacturing. Must provide Form S-211 claiming the manufacturing exemption.
390 
391### Test 7: Landscaping Services [T1]
392 
393**Question:** A homeowner pays a landscaping company $500 for lawn mowing and $200 for tree trimming in Wisconsin. What tax is due?
394 
395**Expected Answer:** Both services are taxable. Total: $700 x 5.5% = $38.50.
396 
397---
398 
399## Reviewer Escalation Protocol
400 
401| Trigger | Action |
402|---------|--------|
403| Any [T3] tagged item encountered | STOP. Do not guess. Escalate to licensed CPA, EA, or tax attorney. |
404| Client has audit notice or assessment | Escalate immediately. Do not advise on audit response. |
405| Multi-state nexus question involving 3+ states | Flag for senior reviewer with multi-state experience. |
406| Penalty abatement or voluntary disclosure | Escalate to licensed professional with state-specific experience. |
407| Ambiguous taxability of a product/service | Present both interpretations to reviewer with supporting authority. |
408 
409---
410 
411## Contribution Notes
412 
413- This skill follows the Q1 execution format (Step 0 through Step 7).
414- All rules are tagged [T1], [T2], or [T3] per the Confidence Tier Definitions.
415- Rate tables are deterministic lookup tables -- no narrative explanation of rates.
416- To update this skill, submit a pull request with the specific section, supporting statutory authority, and effective date of the change.
417- All changes require validation by a US CPA or EA before merging.
418 
419---
420 
421## Disclaimer
422This skill and its outputs are provided for informational and computational purposes only and do not constitute tax, legal, or financial advice. Open Accountants and its contributors accept no liability for any errors, omissions, or outcomes arising from the use of this skill. All outputs must be reviewed and signed off by a qualified professional (such as a CPA, EA, tax attorney, or equivalent licensed practitioner in your jurisdiction) before filing or acting upon.
423 
424The most up-to-date, verified version of this skill is maintained at [openaccountants.com](https://openaccountants.com). Log in to access the latest version, request a professional review from a licensed accountant, and track updates as tax law changes.
425 

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About

Use this skill whenever asked about Wisconsin sales tax, Wisconsin use tax, Wisconsin sales tax nexus, Wisconsin sales tax returns, Wisconsin exemption certificates, taxability of goods or services in Wisconsin, or any request involving Wisconsin state-level consumption taxes. Trigger on phrases like "Wisconsin sales tax", "WI sales tax", "Wisconsin use tax", "Wisconsin nexus", "Wis. Stat. 77.51", "Wisconsin DOR sales tax", or any request involving Wisconsin sales and use tax filing, classification, or compliance. ALWAYS read the parent us-sales-tax skill first for federal context.

US-WIty-2025

US-WI skill: