How to Invoice as a Mobile App Developer in Baltimore, MD

Invoicing guide for mobile app developers in Baltimore: 6% MD sales tax, 1.5%/mo late-fee cap, plus MD licensing and contractor rules.

Combined sales tax
6%
Late fee cap
1.5%/mo
Net terms
30 days
Deposit
33%
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1. Baltimore-specific tax handling

  • State sales tax: 6%. Local jurisdictions in Baltimore may add their own rate — verify with your local tax assessor.
  • Late fees: MD statute Md. Com. Law §12-103 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 Baltimore

Net 30 is standard for mobile app developers. Most mobile app developers in competitive markets like Baltimore require a 33% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Baltimore 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
Baltimore
State
MD
Net terms
30 days
Deposit
33%

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