How to Invoice as a Private Security Company in Washington

How to invoice as a private security company in Washington: WA sales tax 6.50% (applies to services), late fees capped at 1.5%/mo under Wash. Rev. Code §19.52.020. Step-by-step guide with a free template.

State sales tax
6.5%
Late fee cap
1.5%/mo
Net terms
30 days
Deposit
0%
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1. Washington-specific invoice requirements

  • Sales tax line: 6.50% state rate. Services billed to WA customers must include sales tax. State 6.5%; many services taxable. Combined commonly 8.5-10.5%.
  • Late-fee cap: Washington statute Wash. Rev. Code §19.52.020 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 Washington get 72-hour cancellation rights on certain home-services contracts. Disclose this in your terms.

2. Private Security Company line items + standard terms

Every private security company invoice in Washington should itemize work clearly. Standard private security companys use Net 30 terms with no deposit required.

  • Unarmed officer — per hour — billed by hour (~$35 default).
  • Armed officer — per hour — billed by hour (~$65 default).
  • Vehicle patrol — billed by flat.
  • Holiday surcharge — billed by pct.

3. Private Security Company licensing in Washington

State security agency license required. Each officer must hold state guard card; armed officers need separate firearms permit.

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. Washington customers expect digital payment options today — accepting card and ACH typically reduces days-to-paid by 30–50%.

Average invoice
$1,850
State
WA
Net terms
30 days
Deposit
0%

Washington metro guides

Metro-specific guides include the combined sales-tax rate and local pricing benchmarks.

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