Real Estate Excise Tax Affidavit: Your Complete Guide

Published On

April 9, 2026

Key Highlights

Here's a quick look at what you need to know about the real estate excise tax affidavit process:

  • The Real Estate Excise Tax (REET) is a tax on the sale of real property in Washington State.
  • A Real Estate Excise Tax Affidavit (REETA) is required for nearly every transfer of property ownership.
  • This affidavit and the tax payment are due to the county treasurer within 30 days of the sale.
  • Both the buyer and seller must sign the affidavit, though an agent can sign with proper legal authority.
  • The Department of Revenue provides the official forms, but local county requirements may vary slightly.
  • Filing this document is a crucial step before the new deed can be recorded with the county auditor.

Introduction

Navigating a real estate transaction involves a lot of paperwork, and one crucial document in Washington State is the Real Estate Excise Tax Affidavit. If you're buying or selling real property, understanding this form is essential. This tax applies to the sale of real estate and the affidavit is the document used to report the transaction to the state. This guide will walk you through what the affidavit is, who needs to file it, and how to complete the process smoothly.

Overview of Real Estate Excise Tax Affidavit

The real estate excise tax affidavit is a key document in Washington State property transactions. It's a mandatory form that accompanies the payment of the real estate excise tax, which is levied on the sale of real property. This affidavit provides all the necessary details of the sale to the Department of Revenue and the county.

Essentially, you cannot record a new deed and officially transfer ownership without first submitting this completed form to the county treasurer's office. Let's explore the specific purpose of this document and when it's required.

Definition and Purpose of the Affidavit

What exactly is an excise tax affidavit? It's a state-mandated document that discloses the details of a real property transfer. Think of it as a report that details the seller, buyer, property specifics, and selling price. The primary purpose of the real estate excise tax affidavit is to calculate and collect the tax due on the sale.

The information you provide helps the Department of Revenue ensure the correct amount of real estate excise tax is paid. It also serves as an official record of the transaction for both the county and the state, creating a clear paper trail for the change in property ownership.

This estate excise tax affidavit, along with the conveyance document like a deed, must be presented to the treasurer’s office. This step is mandatory before the county auditor will record the new deed, making it a critical part of finalizing the sale of any real property.

When the Affidavit Is Required in Real Estate Transactions

In Washington State, a real estate excise tax affidavit is required for nearly every transfer of property ownership. It’s not just for typical sales of real property between a buyer and a seller. The rule is straightforward: if ownership of real property changes hands, an affidavit is almost always necessary.

This requirement applies even in situations where no money is exchanged, such as a gift of property. The Department of Revenue needs to document every change of ownership to maintain accurate property records and determine if any tax is due.

You must file an excise tax affidavit in the following situations:

  • Standard sales of residential or commercial property.
  • Gifting a property to another person.
  • Transfers of controlling interest in an entity that owns real estate.

Even if a transaction is exempt from the tax, the affidavit must still be completed and filed, and a minimum processing fee is typically collected.

Who Is Responsible for Filing the Affidavit?

When it comes to filing the excise tax affidavit, it's a shared taxpayer’s responsibility. Both the buyer and the seller must sign the document to certify that the information is accurate. However, the process is often managed by professionals involved in the real estate transaction.

Traditionally, the seller is responsible for paying the tax, but this can be negotiated. The crucial part is ensuring the completed affidavit and payment reach the county treasurer on time. The following sections will clarify the specific roles different parties play in this process.

Roles of Buyers and Sellers

In a property transaction, both buyers and sellers have a direct role in the excise tax affidavit process. The primary responsibility is to provide accurate information and sign the affidavit. Both parties must attest to the details of the sale, including the purchase price and terms.

While traditionally the seller pays the excise tax, who pays is not regulated by the state and can be a point of negotiation. Regardless of who writes the check, both parties must sign the Treasurer’s copy of the four-part form, which is often printed on legal size paper to meet county preferences.

This joint signature requirement ensures that both sides agree on the facts of the transaction before the property ownership is officially transferred. If an agent signs on behalf of a buyer or seller, they must provide documentation proving they have the legal authority to do so.

Role of Real Estate Agents and Escrow Companies

Real estate agents and escrow companies are central to managing the affidavit process. They typically guide buyers and sellers through the paperwork, ensuring the form is filled out correctly and completely. These professionals understand the nuances of the transaction and can help prevent common errors.

Escrow companies, in particular, often handle the submission of the affidavit and the tax payment to the county treasurer. They collect the necessary funds from the responsible party at closing and ensure the documents are delivered to the proper authorities. For their work, they may charge an affidavit processing fee.

By coordinating with the Washington State Department of Revenue and local county offices, real estate agents and escrow companies help streamline the transaction. Their expertise ensures that all legal requirements are met, allowing the sale to close smoothly and the new deed to be recorded without delay.

Downloading the Official Real Estate Excise Tax Affidavit Form

To start the process, you need the official Real Estate Excise Tax Affidavit form. The Washington State Department of Revenue provides these forms for public use. It's important to use the correct and most current version to avoid any processing delays with the county treasurer.

You can typically find these forms online through the Department of Revenue's official website. Using the state-provided form ensures you are complying with state law and providing all the required information for the real estate excise tax calculation.

Where to Find Washington State Forms Online

The most reliable place to find the excise tax affidavit is the Washington State Department of Revenue website. The department creates and maintains the official forms, ensuring they comply with all current laws and regulations. You can search directly on their site for "Real Estate Excise Tax Affidavit" to locate the correct documents.

Once downloaded, you'll see that the form is a multi-part document, with copies for the treasurer, the Department of Revenue, the assessor, and the taxpayer. While not always mandatory, it is often requested that you print the affidavit on legal size paper.

Here are the primary places to look for the form:

  • The Washington State Department of Revenue’s official website, under the "Forms" section.
  • Your county treasurer or county auditor’s office website may also provide direct links.

Always double-check that you are using the latest version of the form before filling it out.

Differences in County and State Requirements

While Washington state law provides the foundational rules for the real estate excise tax, individual counties can have their own specific procedures. The tax rate itself can vary, as some local jurisdictions add their own tax on top of the state's rate. This means the total tax due can differ from one county to another.

Additionally, each county treasurer or county auditor’s office might have unique submission preferences. For example, one county might strongly request forms be printed on legal-size paper, while another may be more flexible. Some county assessor offices may also require additional documentation for certain types of transfers.

It is always a good idea to check with the specific county where the property is located to confirm their exact requirements.

Aspect / State Requirement (DOR) / Potential County Variation

Form

Provides the official affidavit form.

May request printing on legal paper or have specific submission bundles.

Tax Rate

Sets the graduated state tax rate.

Can add a local tax, increasing the total rate.

Payment

Tax must be paid to the county treasurer.

May have specific rules on payment methods (e.g., only cash or check).

Supporting Docs

Requires supplemental forms for certain exemptions (e.g., gifts).

May ask for additional local forms or specific copies of documents.

Step-by-Step Guide to Filling Out the Affidavit

Filling out the excise tax affidavit requires careful attention to detail. The form asks for specific information about the buyer, seller, property, and terms of the sale. The Washington Administrative Code (WAC) provides detailed instructions, and the form itself often has line-by-line guidance on the last few pages.

To complete it accurately, you will need to gather all relevant information before you begin. Taking your time and following the detailed instructions will help you avoid errors that could delay the closing of your property tax transaction.

Required Information and Line-by-Line Instructions

When you sit down to complete the excise tax affidavit, you will need several key pieces of information at your fingertips. The form is designed to capture all the essential details of the transaction to correctly calculate the tax due.

The affidavit includes sections for the seller's and buyer's names and addresses, the property's legal description and parcel number, the date of sale, and the financial details of the transaction. Following the form’s line-by-line instructions is the best way to ensure accuracy.

You will need to provide the following details:

  • The full selling price and fair value of the property.
  • The type of property being transferred (e.g., residential, commercial).
  • The date of sale, which is the date on the conveyance document.
  • The applicable tax rate for the jurisdiction to calculate the final amount owed.

Common Mistakes to Avoid While Completing the Form

Even with instructions, it is easy to make mistakes on the excise tax affidavit. These errors can lead to processing delays, requiring you to correct and resubmit the form. One of the most frequent issues is simply not completing the affidavit in full. Every line needs to be addressed.

Another common pitfall involves gift transactions. If you are gifting property, you may need to submit a supplemental statement along with the main affidavit. This additional information helps the county treasurer determine if any real estate excise tax is due, as some gifts are not fully exempt.

To avoid problems, watch out for these common mistakes:

  • Forgetting to have both the grantor (seller) and grantee (buyer) sign the form.
  • Failing to provide documentation showing legal authority if an agent signs on behalf of a party.
  • Not paying the tax within 30 days of the sale, which results in interest and penalties.

Supporting Documents Needed for Submission

When you submit the excise tax affidavit, it rarely travels alone. You will need to include several supporting documents to validate the information on the form and complete the property transfer. These documents provide the legal basis for the sale and help the county treasurer process the transaction correctly.

The specific documents required can depend on the nature of the sale, such as whether it's a standard sale, a gift, or a controlling interest transfer. Gathering these papers ahead of time will ensure your submission is complete and accepted without issue.

Typical Documentation to Attach with the Affidavit

For most sales of real property, the primary supporting document is the conveyance document itself. This is the legal instrument that transfers the property, such as a deed. Without it, the affidavit cannot be processed.

Depending on the specifics of your transaction, other forms may be required. For instance, if the property is enrolled in a current use program, a Notice of Continuance signed by the buyers and the assessor's office is necessary. For gifted properties, a supplemental statement is often required.

Be prepared to submit the following with your affidavit:

  • The signed conveyance document (e.g., warranty deed, quitclaim deed).
  • A deed of trust, if there is financing involved.
  • A completed supplemental statement for gifts or other exempt transactions.
  • A Notice of Continuance if the property is in a special tax program.

Verifying All Details Before Submission

Before you hand everything over to the county treasurer, take a final moment to double-check all your paperwork. A simple typo or missing signature can halt the entire process. Verify that the names, property description, and sales price on the excise tax affidavit match the details on the conveyance document and other forms.

Ensure all required signatures are in place. Both the buyer and seller must sign, and if an agent is signing, you must attach proof of their legal authority. Confirm that you have included all necessary additional information and supplemental forms that apply to your specific transaction.

This final review is your best defense against delays. A complete and accurate submission allows the county treasurer to process your real estate excise tax payment quickly, paving the way for the deed to be recorded and the property ownership to officially transfer to the new owner.

Conclusion

In summary, understanding the Real Estate Excise Tax Affidavit process is essential for anyone involved in real estate transactions. Being knowledgeable about the affidavit's purpose, the responsibilities of buyers, sellers, and agents, as well as the necessary steps to complete the paperwork can save you time and prevent costly mistakes. By following our step-by-step guide and ensuring all required documents are attached, you can navigate this process with confidence. If you have any questions or need assistance, don’t hesitate to reach out for a free consultation to help guide you through your real estate needs. Your peace of mind is just a step away!

Frequently Asked Questions

What happens if I submit an incomplete or incorrect affidavit?

If your excise tax affidavit is incomplete or incorrect, the county treasurer will reject it. This will delay the recording of your deed and the official transfer of ownership. You will need to correct the errors and resubmit the form, and you could face penalties if the delay causes you to miss the 30-day payment deadline.

Can I file the real estate excise tax affidavit online?

Currently, the State of Washington does not offer an option for e-filing the real estate excise tax affidavit. You must submit a physical copy of the form, often on legal size paper, to the county treasurer's office in person or by mail along with the payment and supporting documents.

How is the tax amount calculated when submitting the affidavit?

The tax is calculated based on the property's selling price. Washington uses a graduated tax rate, so the rate increases as the purchase price goes up. The amount is determined by applying the combined state and local tax rate to the fair value of the property as reported on the excise tax affidavit.