How to Invoice as a Dentist in Washington

How to invoice as a dentist 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
25%
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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. Dentist line items + standard terms

Every dentist invoice in Washington should itemize work clearly. Standard dentists use Net 30 terms with a 25% deposit required upfront.

  • Cleaning + exam — billed by flat (~$220 default).
  • Restorative procedure — billed by flat.
  • X-ray series — billed by flat (~$165 default).
  • Insurance write-off — billed by flat.

3. Dentist licensing in Washington

State DDS / DMD license required. ADA CDT codes used on insurance claims. HIPAA compliance required.

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
$850
State
WA
Net terms
30 days
Deposit
25%

Washington metro guides

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

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