Rates last verified: August 26th, 2026
Sources: Washington Department of Revenue; Revised Code of Washington; Washington Administrative Code. Full citations at the bottom of this page.
Washington treats telecommunications service as a retail sale, so the full state and local sales tax stack applies to the bill. The provider also owes business and occupation (B&O) tax on its gross proceeds. Then come the per-line taxes: a 911 excise tax split between the state and the counties, and a statewide 988 crisis line tax, both applied per line across wireline, wireless, and Voice over Internet Protocol (VoIP) service.
Quick Facts
| Item | Washington Treatment |
|---|---|
| Retail sales tax | 6.5% state, plus local rates by location; telecommunications and ancillary services are retail sales (WAC 458-20-245) |
| Business and occupation tax | Retailing B&O on the provider's gross proceeds; wholesaling B&O on sales for resale |
| 911 excise tax | $0.25 state plus $0.70 county, for a combined $0.95 per line, per month |
| 911 on prepaid wireless | The same amounts per retail transaction, collected by the seller |
| 988 crisis line tax | $0.40 per line, per month, since January 1, 2023 (RCW 82.86.020) |
| Lines covered by 911 and 988 | Switched access (wireline) lines, wireless numbers, and interconnected VoIP lines, capped at the number of lines on the account |
| Internet access | Excluded from retail sales tax (RCW 82.04.297) and protected by the federal Internet Tax Freedom Act |
How Washington Taxes Telecom Services
Washington classifies the sale of telecommunications service and ancillary services to a consumer as a retail sale. That single classification does most of the work: the customer owes retail sales tax at 6.5% state plus the local rate for the location, and the provider owes retailing B&O tax on the gross proceeds of the same sale. Sales for resale in the regular course of business move under the wholesaling B&O classification instead, with no sales tax.
The local layer matters because Washington's local sales tax rates vary widely by city and county, and the rate follows where the service is sourced. A provider billing customers across the state calculates against hundreds of local rate combinations, and the Department of Revenue updates local rates quarterly.
911, 988, And Other Per-Line Taxes
Washington funds 911 through a two-part excise tax: 25 cents per month at the state level and 70 cents per month at the county level, for a combined 95 cents per line. Every county imposes the county tax at 70 cents. The tax applies to each switched access line, each wireless telephone number, and each VoIP line, and providers report collections to the county where the service is provided.
Prepaid wireless pays the same 911 amounts per retail transaction at the point of sale, collected by the retailer.
The 988 crisis line tax adds 40 cents per line, per month, effective January 1, 2023, up from 24 cents when the tax began in October 2021. It covers radio access lines including prepaid wireless, interconnected VoIP lines, and switched access lines, with the tax capped at the number of lines on the account. Between 911 and 988, a Washington line carries $1.35 in flat monthly excise taxes before the sales tax percentage even applies.
Taxability By Service Type
- Telecommunications service and ancillary services sold to a consumer: retail sales tax plus retailing B&O on the provider.
- Sales for resale: wholesaling B&O, no retail sales tax.
- Wireline, wireless, and interconnected VoIP lines: the 911 excise tax and the 988 tax apply per line to all three.
- Prepaid wireless: 911 collected per retail transaction; the 988 tax reaches prepaid radio access lines.
- Internet access: excluded from retail sales tax under RCW 82.04.297 and the federal Internet Tax Freedom Act.
How CereTax Handles Washington
Washington stacks a percentage layer on a flat-fee layer and varies both. The sales tax rate depends on the local jurisdiction, the per-line taxes depend on counting lines by account and technology, and prepaid moves the collection point to the register. CereTax sources each charge to the right local jurisdiction at the rooftop level, applies the per-line 911 and 988 taxes by connection count, and keeps an audit trail behind every calculation. If you serve customers in Washington, book a demo and bring a real invoice.
Sources
- Washington Department of Revenue, 911 Tax. Accessed August 25, 2026.
- RCW 82.86.020, 988 behavioral health crisis response and suicide prevention line tax. Accessed August 25, 2026.
- WAC 458-20-245, taxability of competitive telephone service, telecommunications service, and ancillary services. Accessed August 25, 2026.
- Washington Department of Revenue, retail sales tax rate materials. Accessed August 25, 2026.
- Washington Department of Revenue, business and occupation tax rate materials. Accessed August 25, 2026.
- RCW 82.04.297, internet access exclusion. Accessed August 25, 2026.
- Internet Tax Freedom Act, 47 U.S.C. § 151 note.
See how other states compare on the full telecom tax by state table.
