What is a Form W-3?

What is a Form W-3 and who must file it?
Form W-3 is a summary tax form that U.S. employers file with the SSA to report the totals from all their Form W-2s.
- It sums up wages, tax, and withholding for all staff.
- Any employer who files Form W-2 must also file it.
- It is due by January 31 of the next tax year.
As an employer in the United States, filing Form W-3 is one of your key duties. In this article, we explain what this tax form needs and why it matters. Read on for a simple, step-by-step guide to fill and file it right.
Form W-3 defined
See Form W-3 (Rev. July 2023).
Form W-3 is also called the Transmittal of Wage and Tax Statements. It is a key document that you file along with Form W-2. In fact, it works hand in hand with the Form W-2 you send for each worker.
In short, this document sums up your employees’ tax details. For example, it covers total earnings, withholdings, and other key data. As a result, the IRS can cross-check the figures on Form W-2 with ease.
As an employer, you must make sure the W-3 Form is correct and complete. So take care with every number you enter.

Why does the IRS need a Form W-3?
First, the IRS uses Form W-3 to check reporting and spot any gaps in the tax data from employers. With this document, the IRS can confirm that all taxes owed have been paid. So it helps flag fraud or errors in reporting.
Form W-3 also validates employee and business details from your workers’ W-2 Forms. This includes:
- Employee wages
- Federal income tax data
- Withheld amounts for Medicare and Social Security taxes
- State income tax details
- Employer identification number
- Business contact information
An accurate Form W-3 helps workers get the right wage and withholding data for the year. So it keeps everyone on the same page.
Who needs to file a Form W-3?
Any employer who must file Form W-2 must also file Form W-3. This includes:
- Businesses of all sizes
- Non-profit organizations
- Government entities
- Household employers who paid wages to household staff
There is one exception. If you report your W-2 data online, that filing counts as your Form W-3. So you do not send a separate paper copy.
How to fill out a Form W-3
So a correct Form W-3 gives the IRS complete data. Here is a simple step-by-step guide to fill it out:
- Enter your employer details at the top. This includes your employer identification number (EIN), business name, and address.
- Report the number of Form W-2s filed under your EIN for the tax year.
- Enter the total Social Security wages and Medicare wages from all your Form W-2s.
- Fill in the total amounts withheld for Social Security and Medicare taxes.
- If needed, report any other withheld taxes, such as federal or state taxes.
- Double-check every entry for accuracy and completeness.
- Sign and date the form to certify it.
Good payroll software can fill in many of these totals for you. As a result, you cut the chance of manual errors.
How to file a Form W-3
When you file Form W-3, you have a few options. Let us look at three common methods.
File online with Business Services Online (BSO)
The IRS urges employers to file Forms W-3 and W-2 online through the Business Services Online (BSO) platform. In addition, BSO has a simple interface that makes filing easier. Here is how you file online with BSO:
- Go to the Social Security Administration (SSA) website and follow the sign-up steps. Have your EIN, business details, and contact information ready.
- Once registered, open the Form W-3 on BSO. Enter the correct wage and withholding data from your Form W-2.
- When your forms are done, submit them through BSO. The system then walks you through each step.

Use payroll or tax software
Another easy option is to use payroll or tax software to file Form W-3. In fact, many payroll tools let you prepare and e-file the form in one place. Here is how you use software to file the form:
- Pick reliable payroll or tax software that fits your needs. Confirm that it can create and file Form W-3.
- Enter employee details with care, including earnings and withholdings. The software then compiles this data into the form.
- Double-check the auto-filled form for accuracy. Once confirmed, follow the software’s steps to e-file.
Mail Forms W-3 and W-2
Still, you may prefer a traditional route. In that case, you can mail the completed Form W-3 and Form W-2 to the SSA. Follow these steps to file by mail:
- Print the Form W-3 and all matching Form W-2s for your workers.
- Fill out both forms with care, and include all needed information.
- Before you mail them, make copies for your records. Keeping a copy of every filed form is essential.
- Once done, package the forms and send them to the right SSA office. Check the IRS guidelines for the correct address, which can vary by location.
Some firms skip this work and outsource payroll to a provider instead. As a result, a specialist handles the filing for them.
When to submit a Form W-3
Form W-3 must reach the Social Security Administration by January 31 of the next tax year. In addition, this deadline applies to both paper and electronic filing.

If you miss the deadline or send wrong forms, the IRS may charge penalties. So make sure all the data on these forms is correct and complete. Sound payroll best practices help you avoid these fines.
Finally, staying compliant with IRS rules is key to smooth operations. Form W-3 is often overlooked, yet it is a needed part of that compliance.
Frequently asked questions
What is a Form W-3 used for?
In short, it sums up the wage and tax totals from all your Form W-2s. So the IRS and SSA can cross-check the figures. In short, it is a transmittal, or summary, form.
Who has to file Form W-3?
Any employer who files Form W-2 must also file Form W-3. This covers businesses, non-profits, government bodies, and household employers.
When is Form W-3 due?
So Form W-3 is due by January 31 of the next tax year. Also, this date applies to both paper and electronic filing.
Do I still file Form W-3 if I file W-2 online?
No, you do not. When you file your W-2 data online, that filing counts as your Form W-3. So you skip the separate form.
What happens if I file Form W-3 late or wrong?
The IRS may charge penalties for late or incorrect forms. So double-check every entry before you file. Payroll software and clear records help you stay accurate.







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