How to Invoice as a Architect in Helena, MT

Invoicing guide for architects in Helena: 0% MT sales tax, 1.5%/mo late-fee cap, plus MT licensing and contractor rules.

Combined sales tax
0%
Late fee cap
1.5%/mo
Net terms
30 days
Deposit
25%

1. Helena-specific tax handling

  • State sales tax: 0%. Local jurisdictions in Helena may add their own rate — verify with your local tax assessor.
  • Late fees: MT statute Mont. Code §31-1-106 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 Helena

Net 30 is standard for architects. Most architects in competitive markets like Helena require a 25% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Helena 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
Helena
State
MT
Net terms
30 days
Deposit
25%

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