How to Invoice as a Plumber in Helena, MT

Invoicing guide for plumbers 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
14 days
Deposit
30%
Create your first invoice freeSee pricing

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 plumber line items

  • Service call fee — billed by flat (~$95 default).
  • Labor — billed by hour (~$110 default).
  • Materials — billed by itemized.

3. Payment terms that work in Helena

Net 14 is standard for plumbers. Most plumbers in competitive markets like Helena require a 30% 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-licensed in most states. Master plumber license typically required for self-employment.

Metro
Helena
State
MT
Net terms
14 days
Deposit
30%

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