How to Fill Out Form W-8BEN for Charles Schwab in Cambodia in 2026

Charles Schwab Tax Update

If you have a Charles Schwab international brokerage account and live in Cambodia, Schwab may ask you to update or renew your Form W-8BEN. This form is important because it confirms to the U.S. financial institution that you are a foreign individual rather than a U.S. person for U.S. tax-withholding purposes.

In this guide, we explain how a Cambodian resident can complete the Schwab W-8BEN update step by step.

Charles Schwab states that Form W-8BEN is required for nonresident account holders and generally must be renewed every three years. Schwab also says that if information that makes the form incorrect changes, a new form should be completed.

What Is Form W-8BEN?

Form W-8BEN stands for Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals).

It is generally used by a non-U.S. individual to:

• Confirm that they are not a U.S. person.
• Certify their foreign status.
• Confirm that they are the beneficial owner of the income covered by the form.
• Claim a reduced U.S. withholding rate when an applicable U.S. tax treaty exists.

The IRS explains that Form W-8BEN is given to the withholding agent or financial institution rather than sent directly to the IRS.

For Schwab customers, the form can normally be completed through the Schwab account interface. Schwab also provides a Substitute Form W-8BEN through its W-8 Resource Center.

Before You Start

Have the following information available:

1. Your legal name
2. Country of citizenship
3. Permanent residential address in Cambodia
4. Mailing address, if different
5. U.S. Social Security Number or ITIN, if you have one
6. Cambodian foreign tax identification number (FTIN), if applicable
7. Schwab account number
8. Your date of birth, if requested by Schwab
9. Your telephone number
10. The date you are completing the form

For Cambodian taxpayers, the General Department of Taxation uses a Tax Identification Number (TIN) for registered taxpayers. If you have a Cambodian TIN, use your actual tax identification information where Schwab asks for your foreign tax identification number.

If you are unsure whether your Cambodian identification number qualifies as the FTIN requested by Schwab, verify it with the Cambodian General Department of Taxation or a qualified tax professional rather than guessing.

Note: This guide I want to show for citizens in Cambodia only who have no Tax (TIN), and you are Cambodian.

Step 1: Log In Charles Schwab Account

Go to the official Schwab website and sign in to your international brokerage account.

After logging in, Schwab says you can find the W-8BEN form through:

Service → Forms → Account Servicing → International → Substitute Form W-8BEN

The exact wording or location may change slightly depending on Schwab’s current website interface.

If Schwab displays a notification asking you to update your tax information, you can also follow that notification. Right now, when you log in to your Charles Schwab account, you will see the W-8BEN form in your interface. And you can click on Verify Now

Step 2: Start the W-8BEN Update

Select the option to update, renew, or complete your W-8BEN. This step is for when you are already inside your account.

Schwab may display an electronic version of its Substitute Form W-8BEN rather than the standard paper IRS form.

The information requested generally corresponds to the IRS W-8BEN requirements.

Step 3: Enter Your Name

Look for:

Name of Individual Who Is the Beneficial Owner

Example

Jenny William

Use your legal name, not a nickname.

If your passport or official identification says “Jenny William,” enter:

Jenny William

Do not enter the name of your brokerage account as the beneficial owner’s name if you are completing the form as an individual.

The IRS specifically instructs individuals to enter their name on Line 1.

Fill in all fields as you see

Step 4: Enter Your Country of Citizenship

The next field asks for:

Country of Citizenship

Example

Cambodia

Do not enter an abbreviation if the form asks for the full country name.

The IRS instructions state that an individual should enter the country of citizenship. Special rules apply if someone has dual citizenship.

Example for Jenny William

Country of Citizenship: Cambodia

This assumes Jenny is actually a Cambodian citizen.

If you have another citizenship, use your actual circumstances rather than automatically copying this example.

Step 5: Tax Identification Numbers

If you have a valid U.S. SSN or ITIN, enter it where requested.

If you do not have a U.S. SSN or ITIN, do not invent a number.

The IRS instructions distinguish between the U.S. TIN and the foreign tax identification number.

Then fill in the Tax Identification Numbers

Step 6: Enter Permanent Residence Address

This is one of the most important sections.

Enter your actual permanent residential address in Cambodia.

The IRS says the permanent residence address should be the address in the country where you claim residence for tax purposes. It should not be a financial institution address, P.O. Box, or an address used only for mailing.

Example

Jenny William

Street/House: [Jenny’s actual street and house number]

City/Province: Siem Reap

Country: Cambodia

Postal Code: [Actual postal code]

Do not use the example information unless it is actually your address.

Step 7: Enter Your Mailing Address

Schwab may ask for a separate mailing address.

If your mailing address is exactly the same as your permanent residence, you may be able to indicate that it is the same.

If it is different, enter your actual mailing address.

Example

Mailing Address: Same as Permanent Residence

Mailing Address Example: [email protected] and then enter your First name, Last name, and phone number, check the box, and continue

If your mailing address is different, enter the correct address.

When you click on Continue, you will get to this step. Note: Enter your Confirmation Code, choose a question, and create a security word. Please note as well, then click on OK

After you click on OK, you will see the Form W-8BEN; click on it and continue

Then you get to the next step: United States Citizenship Status; click No all and => continue

Step 8: U.S. Taxpayer Identification Number

The W-8BEN may ask for the reason why you don’t have a TIN, U.S. taxpayer identification number (SSN or ITIN). Because you are Cambodian and living in Cambodia, you don’t have a TIN or SSN, so please select as below, and you can write in the box like this text [ I am a resident of Cambodia and do not have a foreign tax identification number because I am not legally required to obtain one under the applicable tax rules in Cambodia.] or create a new one as you understand. Then click Continue

When you click Continue, it will ask you to enter it again; then click Continue again

Step 9: Claiming U.S. Tax Treaty Benefit

This is a particularly important step for Cambodian residents.

The W-8BEN contains a section for claiming benefits under an applicable income-tax treaty.

The IRS explains that this section is used when a person is a resident of a foreign country with which the United States has an applicable income tax treaty.

As of 2026, Cambodia is not listed among the U.S. income-tax treaty jurisdictions on the U.S. Treasury’s current treaty list.

Therefore, a Cambodian resident should not enter Cambodia as a treaty country or claim a reduced treaty withholding rate simply because they live in Cambodia.

Example for Jenny William

Country claiming treaty benefits: Do not claim a treaty benefit based on Cambodian residence.

If Schwab’s electronic questionnaire asks whether you want to claim treaty benefits, the appropriate answer for a Cambodian resident will generally be No, assuming there is no other applicable treaty-country residence or special circumstance.

Do not select another country just to obtain a lower withholding rate.

When you click Continue, it will ask you to enter it again; then click Continue again. Next step: click on Confirm & Continue from uploading any document needed if you are U.S., but now you are not

Step 10: Review Withholding Information

Schwab may present additional questions about:

• U.S. dividends
• Interest
• Other U.S.-source income
• Tax withholding
• Treaty benefits
• Foreign status

Answer these according to your actual circumstances.

A W-8BEN does not mean that all U.S. investment income is automatically tax-free.

For example, Schwab explains that non-U.S. investors may receive U.S. tax reporting such as Form 1042-S for reportable income and withholding.

Step 11: Carefully Review Your Information

Before submitting the form, check every field.

For our fictional example:

Never publish your real Schwab account number, TIN, passport number, or other private information in a website article.

Step 12: Complete the Certification

The final section is the certification.

By signing the form, you are certifying that the information you provided is accurate and that you meet the requirements stated in the certification.

For an electronic Schwab form, you may be asked to:

• Confirm the certification
• Provide an electronic signature
• Enter your name
• Confirm your date of birth or other information
• Submit the form electronically

Only sign or certify the form if the information is true and correct.

The IRS provides specific certification requirements for Form W-8BEN.

Then sign your name, for example: Jenny William, like line 1 from the first name that you have entered. Then enter the confirmation code that you noted from step 7

Step 13: Submit the W-8BEN to Schwab

After reviewing everything, submit the form through Schwab’s electronic process.

If Schwab instead asks you to submit a paper form, Schwab says completed forms can be uploaded through the Message Center after logging in. Schwab also provides mailing instructions for account-update forms.

Keep a copy or screenshot of the completed submission for your records.

Confirm your Signature

Final Checklist Before Submitting

Before clicking Submit, check:

☐ Legal name is correct
☐ Country of citizenship is correct
☐ Cambodian permanent residence is correct
☐ Mailing address is correct
☐ U.S. SSN/ITIN is entered only if applicable
☐ Cambodian FTIN is entered correctly if applicable
☐ You have not falsely claimed a U.S. tax treaty benefit
☐ Schwab account information is correct
☐ Certification information is accurate
☐ Electronic signature is completed
☐ You have saved a copy of the submission

Final submit form

Now you are completing the W-8BEN form submission with Charles Schwab, just waiting for review 30 days. This form is valid for 3 years and will expire, so we need to fill it out again.

How Long Is the W-8BEN Valid?

Schwab states that a W-8BEN generally remains valid for the year in which it is signed plus three additional calendar years, unless a change in circumstances makes the information incorrect.

For example, if a W-8BEN is signed during 2026, it would generally remain valid through December 31, 2029, assuming no relevant change in circumstances.

If information that affects the validity of the form changes, you may need to submit a new W-8BEN before the normal expiration date.

What Happens If Not Update Form W-8BEN?

Schwab warns that if there is no valid W-8BEN on file, U.S. tax withholding requirements can result in significantly higher withholding on certain payments. Schwab currently states that an expired or missing W-8BEN can result in withholding of 24% on gross proceeds from certain sales/redemptions and up to 37% on certain U.S.-source payments such as dividends and interest.

The exact tax treatment depends on the type of payment and the applicable U.S. tax rules.

This is one reason it is important to respond when Schwab asks you to renew your W-8BEN.

Common Mistakes Cambodian Should Avoid

1. Claiming a U.S.–Cambodia tax treaty benefit

Do not claim a treaty rate simply because you are a Cambodian resident. The current U.S. Treasury treaty list does not list Cambodia as a U.S. income-tax treaty jurisdiction.

2. Using a P.O. Box as your permanent residence

The IRS specifically says not to use a P.O. Box or an address used solely for mailing as the permanent residence address.

3. Entering your passport number as your FTIN

Your passport number and tax identification number are different types of identification. Use the number that actually qualifies as your foreign tax identification number.

4. Inventing a TIN

If you do not know your Cambodian FTIN, do not guess.

Check your Cambodian tax documentation or contact the Cambodian General Department of Taxation.

5. Using someone else’s information

Each account holder must complete their own W-8BEN. Schwab specifically states that each account holder on a joint account needs a separate form.

6. Assuming W-8BEN determines your Cambodian tax obligations

W-8BEN primarily documents your foreign status for U.S. withholding purposes. It does not by itself determine whether you owe tax in Cambodia.

Important Tax for Cambodian Investors

Completing W-8BEN for Schwab and dealing with Cambodian tax obligations are separate matters.

A Cambodian resident investing in U.S. securities may have U.S. withholding/reporting considerations and may also have Cambodian tax obligations depending on their residency, income, investment activity, and the applicable Cambodian tax rules.

Schwab explicitly states that it does not provide tax advice and recommends consulting a tax professional regarding individual circumstances.

For a significant investment account, it is therefore sensible to confirm your particular situation with a qualified Cambodian tax professional.

Frequently Asked Questions

Does a Cambodian citizen need Form W-8BEN at Schwab?

Generally, a non-U.S. individual using a Schwab international account may be required to complete W-8BEN to document foreign status. Schwab specifically states that the form is required for nonresident account holders.

Can I use my Cambodian address?

Yes. Your permanent residence address should reflect your actual permanent residence in Cambodia if Cambodia is your tax residence.

Should I enter Cambodia for the treaty-benefit section?

Do not claim a U.S. treaty benefit merely because you live in Cambodia. Cambodia is not listed on the U.S. Treasury’s current U.S. income-tax treaty jurisdiction list.

Do I need a Cambodian TIN?

If you have a Cambodian tax identification number, use the applicable number when Schwab asks for your foreign tax identification number. If you are uncertain about which Cambodian number qualifies, verify it with the Cambodian tax authorities or a tax professional.

Does W-8BEN mean I will pay no U.S. tax?

No. W-8BEN establishes your foreign status and may affect withholding. It does not automatically eliminate U.S. tax on U.S.-source income.

How often must I renew it?

Schwab says W-8BEN generally needs to be renewed every three years, subject to the expiration rules and changes in circumstances.

Updating Form W-8BEN is an important part of maintaining a Charles Schwab international brokerage account as a non-U.S. investor. For a Cambodian resident, the key is to provide your real legal information, Cambodian residence information, and applicable Cambodian tax identification information, while avoiding an unsupported U.S. tax-treaty claim.

The example of Jenny William in this guide is only for demonstrating where information goes. Your own W-8BEN should always contain your actual legal and tax information.

Because tax circumstances can differ from one investor to another, this article is intended as a practical guide rather than individualized tax advice. For questions about Cambodian tax obligations, U.S. withholding, or your particular investment situation, consult the relevant tax authority or a qualified tax professional.

Official resources:

• Charles Schwab W-8BEN information and account instructions
• IRS Form W-8BEN instructions
• U.S. Department of the Treasury tax treaty information
• Cambodia General Department of Taxation