Castle Rock, Washington Sales Tax 2026 Guide: Rates & Filing Tips

Castle Rock Sales Tax Guide 2026 (Washington)

Castle Rock, Washington Sales Tax Information

Castle Rock is a city in Washington with a combined sales tax rate of 8.1%. The breakdown of this tax rate includes a State Tax of 6.9%, County Tax of 1.0%, and City Tax of 4.0%. The city of Castle Rock has a higher sales tax rate than some other cities in Washington such as Cathlamet with 7.8%, Centerville with 7.5%, Chinook with 8.1%, Cougar with 7.8%, Dallesport with 7.5%, Glenwood with 7.5%, and Goldendale with 7.5%. There are also cities in Minnesota with varying sales tax rates like Afton and Bayport at 8.4%, Bethel at 8.1%, Braham and Brook Park at 7.4%, Cambridge at 7.9%, and Cannon Falls at 8.1%.

The highest sales tax rate among all cities mentioned is 8.4%, while the lowest is 7.4%.

Castle Rock is connected to several zip codes and districts such as 98611, 55010, 80104, 80108, and 80109, all with a combined sales tax rate of 8.1%. Some products within Castle Rock are tax-exempt, like General Physical items.

Castle Rock

1. Castle Rock sales tax rates

2. Castle Rock Sales Tax Calculator & Lookup Tool

3. Points to Remember

4. Castle Rock sales tax guide

Navigating sales tax compliance in Castle Rock, Texas can be a challenge for businesses of all sizes. Understanding the local regulations, tax rates, and filing requirements is critical to staying compliant and avoiding penalties. At Kintsugi, we simplify sales tax compliance for businesses, helping you focus on growth without the headache of managing complex tax rules.
In this guide, we'll break down everything you need to know about sales tax in Castle Rock for 2026.

What Is the Sales Tax Rate in Castle Rock?

The sales tax rate in Castle Rock, Texas, as of February 2026, is composed of:

Jurisdiction	Sales tax rate
State Tax	6.50%
County Tax	0.00%
City Tax	1.50%
Special Tax	0.00%
Combined Tax	8.00%

(Note: Sales tax rates are subject to change. Check the website for the latest updates.)

View details for sales tax in the state of Texas

Who Needs to Collect Sales Tax in Castle Rock?

Sales tax collection in Castle Rock is required for businesses that meet the following criteria:

Physical Presence: Businesses with a store, office, warehouse, or employee in Castle Rock.
Economic Nexus: Out-of-state businesses exceeding $250,000 + Special Activities in Texas.

Not sure if your business meets these criteria? Kintsugi’s Nexus Analysis Tool can help you determine your sales tax obligations.

What Is Taxable in Castle Rock?

In Castle Rock, Texas, sales tax applies to:

Tangible personal property (e.g., electronics, clothing, furniture).
Certain services.

There are also exemptions for items like Raw Materials, General Occasional Sales, Motor Vehicles Occasional Sales, General Optional Maintenance Contracts. Ensure you check with your state’s tax authority or consult Kintsugi for clarity.

How to File Sales Tax in Castle Rock

Here’s a step-by-step guide for filing your sales tax returns:

Register Your Business: Get a sales tax permit through the state revenue website.
Collect Sales Tax: Accurately calculate sales tax on taxable transactions.
File and Pay: Submit sales tax returns through the state website by the state-specific deadline—monthly, quarterly, or annually depending on your sales volume.

Kintsugi’s Automated Filing Service streamlines the process, ensuring accuracy and timeliness.

Common Challenges in Sales Tax Compliance

Tracking tax rate changes for city, county, and special districts.
Managing exemptions and resale certificates.
Reconciling returns for accurate filing.

Kintsugi’s AI-Driven Compliance Solution takes the guesswork out of sales tax, handling rate calculations, exemption management, and filing across all jurisdictions.

Why Choose Kintsugi for Sales Tax Compliance?

Real-Time Rate Calculation across billing, payments, and e-commerce platforms.
Nexus Tracking to identify where you need to register and collect tax.
Automated Filing to save time and reduce errors.
Audit Support to give you peace of mind.

A direct-to-consumer brand, recovered over $200K in overpaid sales tax within their first month of switching to Kintsugi. Your business could be next.

Ready to Simplify Sales Tax Compliance in Castle Rock?

With Kintsugi, managing sales tax is effortless. Whether you're just starting out or scaling across multiple states, we have the tools to help you stay compliant and grow with confidence.

Ready to automate your sales tax?

Find Sales Tax Information for Other Cities in Texas

Looking for sales tax rates and compliance details for other cities in Texas? Check out our comprehensive table of sales tax information for cities across the state in the table below.