1. Montana-specific invoice requirements
- Sales tax line: 0.00% state rate. Most services rendered in Montana are exempt from sales tax — but materials, parts, and tangible goods are not. No general state sales tax. Resort areas may have local sales tax up to 3%.
- Late-fee cap: Montana statute Mont. Code §31-1-106 caps interest on unpaid invoices at 1.5% per month. Spell out the rate in writing on every invoice and in your contract — courts won't enforce undisclosed fees.
- Right-to-cancel notice: Customers in Montana get 72-hour cancellation rights on certain home-services contracts. Disclose this in your terms.
2. Mobile App Developer line items + standard terms
Every mobile app developer invoice in Montana should itemize work clearly. Standard mobile app developers use Net 30 terms with a 33% deposit required upfront.
- Sprint / milestone — billed by flat.
- Hourly — billed by hour (~$165 default).
- App Store submission — billed by flat.
- Maintenance retainer — billed by flat.
3. Mobile App Developer licensing in Montana
No license required. App Store and Play Store policies must be honored.
4. Send and follow up
Send the invoice the same day work completes. Use software that records open events and offers a one-click online payment so you don't need to chase a check by mail. Montana customers expect digital payment options today — accepting card and ACH typically reduces days-to-paid by 30–50%.
Average invoice
$8,500
State
MT
Net terms
30 days
Deposit
33%
Montana metro guides
Metro-specific guides include the combined sales-tax rate and local pricing benchmarks.