How to Invoice as a Freelance Developer in Boulder, CO

Invoicing guide for freelance developers in Boulder: 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
15 days
Deposit
25%
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1. Boulder-specific tax handling

  • State sales tax: 2.9%. Local jurisdictions in Boulder 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 freelance developer line items

  • Development — billed by hour (~$125 default).
  • Project milestone — billed by flat.
  • Third-party services — billed by passthrough.

3. Payment terms that work in Boulder

Net 15 is standard for freelance developers. Most freelance developers in competitive markets like Boulder require a 25% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Boulder customers expect a one-click payment link in their inbox.

4. Licensing & disclosures

No license required. W-9 / 1099 reporting standard.

Metro
Boulder
State
CO
Net terms
15 days
Deposit
25%

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