📅 2026 Update: Key Tax Changes in Washington

Since the original article was published, there have been important updates regarding tax forms and requirements in Washington State. Notably, the capital gains tax and natural gas use tax addendum have seen significant changes. The details of these updates are crucial for taxpayers to understand as they navigate their financial responsibilities.

The changes mentioned below are essential for anyone dealing with taxes in Washington. The earlier article continues further down the page for more comprehensive information on tax forms and procedures.

📈 Capital Gains Tax Updates

The capital gains excise tax was implemented on January 1, 2022. This tax applies a 7% rate on the sale or exchange of long-term capital assets, such as stocks and bonds. Starting with tax year 2026, individuals can now prepay this tax up to six months before the due date, which is April 15, unless it falls on a weekend or holiday.

This change allows taxpayers to manage their tax liabilities more effectively.

  • 💰 Prepayment Option: Taxpayers can prepay their capital gains tax, aiding in budgeting.

🔄 Natural Gas Use Tax Addendum

The Natural Gas Use Tax addendum has been updated for different periods. The latest update was made on May 1, 2026, for the period starting July 2026 onward. It's important for users of natural gas to stay informed about these changes, as they may affect their tax filings.

  • 🏷️ Stay Informed: Check for updates regularly to ensure compliance.

📄 Filing Requirements for Capital Gains Tax

For individuals owing capital gains tax, a capital gains tax return must be filed along with a copy of the federal tax return for the same year. This requirement ensures that all capital gains are reported accurately to both state and federal tax authorities.

  • 📑 Required Documentation: Keep detailed records of all capital assets sold.

🕒 Deadlines for Tax Payments

The deadline for paying the capital gains excise tax remains April 15, unless it coincides with a weekend or holiday. The option to prepay this tax starting in 2026 is a notable shift in how taxpayers can manage their payments.

  • 📅 Key Deadline: Remember to mark your calendar for April 15.

📌 Summary of Key Points

  • 📈 Capital gains excise tax is 7% on long-term assets.
  • 💰 Prepayment of capital gains tax is allowed starting in 2026.
  • 🔄 Updates to the natural gas use tax addendum were made on May 1, 2026.
  • 📄 Capital gains tax returns must accompany federal returns.
  • 🕒 Tax payments are due April 15 each year.

💡 Tips for Navigating Washington Taxes

Review your specific situation with your attorney to understand how these changes may impact you.

📊 Understand the Capital Gains Tax

Know that the capital gains tax applies only to individuals selling long-term capital assets. Make sure to track any relevant transactions throughout the year to ensure compliance.

💼 Keep Accurate Records

Maintain detailed records of any sales or exchanges of capital assets. This is essential for filing accurate tax returns and may help in the event of an audit.

📅 Plan for Payment Deadlines

Be aware of the April 15 deadline for capital gains tax payments. Consider setting reminders throughout the year to avoid last-minute rushes.

💻 Use Available Resources

Take advantage of the resources provided by the Washington Department of Revenue. They offer forms and guidance that can simplify the filing process.

🔍 Explore Prepayment Options

If you expect to owe capital gains tax, consider the prepayment option. This can help ease your financial burden and keep your tax obligations manageable.

📞 Seek Help if Needed

Don't hesitate to reach out to tax assistance centers if you have questions. They can offer guidance on filing and understanding your tax responsibilities.

🏆 Free Options Ranked by User Reviews (2026)

No national paid services met the review threshold for this area, so this section highlights free resources available to taxpayers in Washington State. These options can provide valuable support without the cost of private services.

🥇 1. Washington Department of Revenue

The Washington Department of Revenue offers a wealth of resources for taxpayers. They provide various forms, publications, and guidance on state tax matters. This service is especially helpful for those needing assistance with capital gains tax filings.

  • 🏢 Who It Helps: All Washington State taxpayers seeking information on state tax requirements.

🥈 2. IRS Taxpayer Assistance Centers

The IRS operates Taxpayer Assistance Centers across the country, including in Washington State. These centers allow individuals to schedule appointments for in-person help with tax-related issues. They can assist with understanding both federal and state tax obligations.

  • 🏢 Who It Helps: Taxpayers needing face-to-face assistance for complex tax matters.

🔎 What to Check Before Paying for Help

  • 📄 Verify the credentials of any service provider.
  • 💰 Consider free resources available first.
  • 🔍 Read reviews to understand others' experiences.
  • 🕒 Check the service's response times and support options.

❓ Frequently Asked Questions

🤔 What is the capital gains tax rate in Washington?

The capital gains excise tax rate in Washington is 7% on the sale or exchange of long-term capital assets.

📅 When are capital gains taxes due?

Capital gains taxes are due on April 15 each year, unless this date falls on a weekend or holiday.

🔄 Can I prepay my capital gains tax?

Yes, starting with tax year 2026, individuals may prepay their capital gains tax up to six months before the payment due date.

🔎 How can I get help with my taxes?

You can seek assistance from the Washington Department of Revenue or visit an IRS Taxpayer Assistance Center for guidance on tax matters.

📑 What forms do I need to file for capital gains tax?

Individuals must file a capital gains tax return along with their federal tax return for the same year.

🏷️ How often are updates made to tax forms?

Updates to tax forms, such as the Natural Gas Use Tax addendum, are made periodically. The most recent update occurred on May 1, 2026.

⚖️ Recent Cases Related to Washington Taxes

Recent court rulings have addressed various tax issues relevant to Washington taxpayers. These rulings can provide insights into current legal interpretations of tax laws.

For more detailed information, feel free to browse more rulings on the news page.

End of October 2026 Update





Corporate Income Tax Forms

Seller : Form Application for Refund or Credit Buyer : Form Buyers Declaration for Refund of Retail Sales Tax

Sales Tax Forms

Exemption Form Form Local Sales and Use Tax Addendum Form Application for Refund of Use Tax Form Consumer Use Tax Return

📝 See Also

Washington Tax Forms: A Comprehensive Guide to Filing Taxes in the Evergreen State

Filing taxes is a tedious task that most people dread. It requires attention to detail, a thorough understanding of state and federal tax laws, and even more so, the right forms to file your taxes. The state of Washington, commonly known as the Evergreen State, has its own set of tax forms that taxpayers must use to file their taxes. In this article, we will explore Washington tax forms in detail, discuss the different types of forms available, and provide you with the most up-to-date information on filing taxes in Washington.

An Overview of Washington Taxes

Before diving into Washington tax forms, it is essential to understand some of the basics of the state tax structure. The state of Washington does not have a personal income tax. This means that residents of Washington do not pay state income tax on their earnings. However, they are still required to pay federal income tax, Social Security, and Medicare taxes.

Sales tax is the most significant source of revenue for the state of Washington. The current sales tax rate in the state is 6.5%, with additional local sales taxes as high as 3.1% in some areas. Property taxes are also a significant revenue source for the state, with a tax rate of 1.05% on average. Homeowners in Washington can deduct up to $2,500 of property tax payments when filing their state taxes.

Washington Tax Forms

Now that we have a basic understanding of Washington's tax structure let's delve into the different types of forms available to taxpayers in the Evergreen State.

Washington Tax Forms for Individuals

The following forms apply to individual taxpayers who reside in Washington.

Form 1: Washington State Tax Return

Form 1 is the most commonly used form by individual taxpayers. You must use this form to file your taxes if you live in the state of Washington and have income subject to Washington state tax or own property in the state. If you are a resident of Washington and earn income outside the state, you are also required to file a Form 1.

On Form 1, taxpayers must report their total income, deductions, and credits. You must also report your federal adjusted gross income (AGI) and any tax payments already made. Additionally, Washington residents must use this form to report any out-of-state income received during the tax year.

Form E-File Authorization

If you're filing your taxes online, you must complete an E-File Authorization form that allows you to file your taxes electronically. The E-File Authorization form is essential because it gives the Washington State Department of Revenue permission to share your tax information with a third-party software provider that will file your taxes on your behalf.

Form 2: Washington State Sales and Use Tax Return

If you're a business owner or operator and sell goods or services in Washington, you must file Form 2. This form is used to report state and local sales and use tax collections.

Form 2 is filed on a regular basis, depending on your business's size and sales volume. However, most taxpayers file this form quarterly. The deadlines for Form 2 are April 30th, July 31st, October 31st, and January 31st.

Form ST-3: Washington State Sales and Use Tax Return Supplemental Schedule

Form ST-3 is a supplementary form that businesses must file with Form 2. This form is used to report additional sales or use tax collections. Businesses must file Form ST-3 only if they have made an error on their original Form 2.

Form 17: Alternative Net Operating Loss Deduction Calculation

If you incurred a net operating loss (NOL) during the tax year, you can use Form 17 to calculate your NOL deduction.

An NOL occurs when your business expenses exceed your revenue for the year. You can use the NOL deduction to reduce the amount of tax you owe to the state of Washington. If your NOL deduction exceeds the amount of tax you owe, you can carry the net operating loss forward to future tax years.

Form 22: Farmers’ and Fishers’ Tax Return

Form 22 is specifically designed for farmers and commercial fishers who have income from agricultural or fishing activities. If you earned income from farming or fishing activities in Washington, you must file Form 22.

On Form 22, farmers and fishers must report their gross income (income before deductions), total expenses, and net income (income after deductions).

Washington Tax Forms for Businesses

In addition to the forms above, businesses operating in Washington must file a range of additional tax forms.

Form 520: Annual Washington Business License Renewal

Form 520 is used to renew your business license annually. If you plan to operate a business in the state of Washington, you must obtain a business license before you begin operations.

The deadline for renewing your business license is December 31st of every year. However, if you're a new business, you have 120 days to obtain the necessary license and file Form 520.

Form 425: Annual Report for Businesses

Form 425 is filed annually by all domestic and foreign corporations, LLCs, and limited partnerships operating in the state of Washington. The purpose of Form 425 is to report any changes in business ownership or organization during the year.

The deadline for filing Form 425 is the end of the month following the anniversary month of your business entity's registration with the Secretary of State. For example, if your business entity was registered with the Secretary of State in January, the deadline for filing the annual report is the end of February.

Form 25: Business and Occupation Tax Return

Form 25 is used by all businesses in Washington that operate for profit. The Business and Occupation (B&O) tax applies to nearly all types of businesses, including professionals, retailers, and wholesalers.

Form 25 is used to calculate the amount of B&O tax due from your business. On this form, taxpayers must report their gross income (income before deductions) and calculate their business tax based on the appropriate B&O tax rate. The deadline for filing Form 25 is the last day of the month following the end of the tax year.

Form 64-0255: Unemployment Insurance Quarterly Tax Report

If you have employees working in the state of Washington, you must file Form 64-0255 to report quarterly wages paid to employees and the unemployment insurance taxes due on those wages.

The unemployment insurance tax helps provide a safety net for workers who have lost their jobs through no fault of their own. The deadline for filing Form 64-0255 is the last day of the month following the end of the quarter.

Form 350: Mandatory Paid Leave Reporting

Under the Washington State Paid Family and Medical Leave (PFML) program, all employers must report employee wages and hours worked quarterly. Form 350 is used to report employee quarterly wages and hours worked, including any paid family and medical leave benefits paid to employees.

If you are a Washington employer and offer paid family and medical leave benefits to your employees, you must file Form 350 quarterly. The deadline for filing Form 350 is the last day of the month following the end of the quarter.

Conclusion

In conclusion, paying taxes is an important responsibility that all residents and businesses in the state of Washington must fulfill. To ensure that you meet your tax obligations, you must use the appropriate tax forms when filing your taxes. This article has provided a comprehensive guide to Washington tax forms, including the different types of forms available and their purpose.

Filing taxes can be a daunting task, but it doesn't have to be. By familiarizing yourself with the different types of forms available and carefully following the instructions, you can file your taxes with ease and avoid any penalties or fines. To stay up-to-date with the latest information on Washington tax forms, we recommend visiting the official website of the Washington State Department of Revenue.