How to Invoice as a Mobile App Developer in Decatur, IL

Invoicing guide for mobile app developers in Decatur: 6.25% IL sales tax, 1.5%/mo late-fee cap, plus IL licensing and contractor rules.

Combined sales tax
6.25%
Late fee cap
1.5%/mo
Net terms
30 days
Deposit
33%
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1. Decatur-specific tax handling

  • State sales tax: 6.25%. Local jurisdictions in Decatur may add their own rate — verify with your local tax assessor.
  • Late fees: IL statute 815 ILCS 205/4 (Interest Act) caps interest on unpaid invoices at 1.5% per month.

2. Standard mobile app developer line items

  • Sprint / milestone — billed by flat.
  • Hourly — billed by hour (~$165 default).
  • App Store submission — billed by flat.
  • Maintenance retainer — billed by flat.

3. Payment terms that work in Decatur

Net 30 is standard for mobile app developers. Most mobile app developers in competitive markets like Decatur require a 33% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Decatur customers expect a one-click payment link in their inbox.

4. Licensing & disclosures

No license required. App Store and Play Store policies must be honored.

Metro
Decatur
State
IL
Net terms
30 days
Deposit
33%

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