How to Invoice as a Welder in Denver, CO

Invoicing guide for welders in Denver: 2.9% CO sales tax, 1.5%/mo late-fee cap, plus CO licensing and contractor rules.

Combined sales tax
2.9%
Late fee cap
1.5%/mo
Net terms
14 days
Deposit
25%
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1. Denver-specific tax handling

  • State sales tax: 2.9%. Local jurisdictions in Denver may add their own rate — verify with your local tax assessor.
  • Late fees: CO statute Colo. Rev. Stat. §5-12-101 caps interest on unpaid invoices at 1.5% per month.

2. Standard welder line items

  • Labor — billed by hour (~$95 default).
  • Filler material — billed by itemized.
  • Mobile setup fee — billed by flat (~$150 default).
  • Certification surcharge — billed by pct.

3. Payment terms that work in Denver

Net 14 is standard for welders. Most welders in competitive markets like Denver require a 25% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Denver customers expect a one-click payment link in their inbox.

4. Licensing & disclosures

AWS or state-specific certification required for structural and pressure work. Mobile welders need contractor license in many states for jobs over a threshold.

Metro
Denver
State
CO
Net terms
14 days
Deposit
25%

Nearby metros

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