How to Invoice as a Architect in Twin Falls, ID

Invoicing guide for architects in Twin Falls: 6% ID sales tax, 1.5%/mo late-fee cap, plus ID licensing and contractor rules.

Combined sales tax
6%
Late fee cap
1.5%/mo
Net terms
30 days
Deposit
25%
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1. Twin Falls-specific tax handling

  • State sales tax: 6%. Local jurisdictions in Twin Falls may add their own rate — verify with your local tax assessor.
  • Late fees: ID statute Idaho Code §28-22-104 caps interest on unpaid invoices at 1.5% per month.

2. Standard architect line items

  • Schematic design phase — billed by flat.
  • Construction documents phase — billed by flat.
  • Hourly — billed by hour (~$195 default).
  • Reimbursable expenses — billed by itemized.

3. Payment terms that work in Twin Falls

Net 30 is standard for architects. Most architects in competitive markets like Twin Falls require a 25% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Twin Falls customers expect a one-click payment link in their inbox.

4. Licensing & disclosures

State licensure (NCARB) required to call yourself an architect or stamp drawings. AIA contracts (B101, etc.) are industry-standard.

Metro
Twin Falls
State
ID
Net terms
30 days
Deposit
25%

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