How to Invoice as a Plumber in Dover, DE

Invoicing guide for plumbers in Dover: 0% DE sales tax, 1.5%/mo late-fee cap, plus DE licensing and contractor rules.

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

1. Dover-specific tax handling

  • State sales tax: 0%. Local jurisdictions in Dover may add their own rate — verify with your local tax assessor.
  • Late fees: DE statute Del. Code tit. 6, §2301 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 Dover

Net 14 is standard for plumbers. Most plumbers in competitive markets like Dover require a 30% deposit upfront before scheduling work. Accept card and ACH on the invoice itself — Dover 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
Dover
State
DE
Net terms
14 days
Deposit
30%

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