How to Invoice as a Insulation Contractor in Madison, WI

Invoicing guide for insulation contractors in Madison: 5% WI sales tax, 0.42%/mo late-fee cap, plus WI licensing and contractor rules.

Combined sales tax
5%
Late fee cap
0.42%/mo
Net terms
14 days
Deposit
30%
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1. Madison-specific tax handling

  • State sales tax: 5%. Local jurisdictions in Madison may add their own rate — verify with your local tax assessor.
  • Late fees: WI statute Wis. Stat. §138.04 caps interest on unpaid invoices at 1.5% per month.

2. Standard insulation contractor line items

  • Material — per sqft — billed by sqft.
  • Labor — billed by hour (~$70 default).
  • Removal of old insulation — billed by flat.

3. Payment terms that work in Madison

Net 14 is standard for insulation contractors. Most insulation contractors in competitive markets like Madison require a 30% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Madison customers expect a one-click payment link in their inbox.

4. Licensing & disclosures

EPA certifications required for older homes. State licensing varies.

Metro
Madison
State
WI
Net terms
14 days
Deposit
30%

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