ITIN for US Brokerage and Bank Interest Income: Reclaiming 30% Backup Withholding Under Exception 1

A common scenario for non-resident investors with US-domiciled brokerage or bank accounts: you receive a year-end Form 1042-S from Interactive Brokers, Charles Schwab, Fidelity, or your bank, showing US-source income paid to you with 30% withheld at source. The withholding rate is the IRS default for foreign payees without a valid W-8BEN carrying a US Taxpayer Identification Number.

You do not necessarily need to file a US tax return to recover that withholding — but you do need an ITIN. Exception 1 on Form W-7 is the IRS pathway that lets non-resident recipients of passive income apply for the ITIN without first attaching a tax return.

This guide explains who qualifies, what the application looks like, and how the refund cycle works once you have the number.

What is being withheld and why

The US withholding regime treats payments to foreign persons differently from payments to US persons. Under Internal Revenue Code Sections 1441 and 3406, a US-domiciled payer of US-source income to a foreign payee must:

1. Identify the payee as a foreign person via Form W-8BEN.
2. Apply the correct withholding rate at source.
3. Report the gross income and withheld amount to the IRS via Form 1042 (the payer's filing) and to the payee via Form 1042-S.

The default rate is 30% for most US-source passive income (interest, dividends, royalties, rents). The rate can be reduced or eliminated if:

• The payee provides a valid W-8BEN including a US Taxpayer Identification Number (TIN), and
• The payee is resident in a country that has an income tax treaty with the US, and
• The W-8BEN claims the applicable treaty rate.

Without a US TIN on the W-8BEN, the brokerage or bank cannot honour any treaty claim, and the default 30% applies. The cause of the over-withholding is almost always the missing US TIN. The fix is the ITIN.

Source: IRS — Tax Treaties.

Form 1042-S — your record of withholding

If you have a US-domiciled brokerage or bank account and you are a foreign person, you receive a Form 1042-S for each tax year in which US-source income was paid to you. The form shows:

• Gross income (Box 2)
• Income code identifying the type of income (e.g., 06 for dividends, 01 for interest)
• Country of residence (Box 13b)
• Tax rate applied at withholding (Box 3b)
• Tax withheld (Box 7a) — the dollar figure that was sent to the IRS on your behalf

The Form 1042-S is what tells you how much was withheld and which income type triggered it. It is also the supporting document attached to your eventual Form 1040-NR when you claim credit for the withholding.

If you received a 1042-S with a 30% rate in Box 3b and your country has a treaty providing a lower rate (China 10% on dividends, India 25% on dividends, UK 15%, etc.), the difference is what is recoverable.

Exception 1 on Form W-7

The Form W-7 instructions (current revision 12/2024) include five Exceptions under reason code (h). Exception 1 is the one that applies to recipients of passive income subject to third-party withholding.

The IRS describes Exception 1 as covering applicants who are:

"the recipient of partnership income, interest income, annuity income, rental income, or other passive income that is subject to third-party withholding or is covered by a tax treaty."

Source: Instructions for Form W-7.

Within Exception 1, the IRS divides applicants into sub-categories:

• Exception 1(a) — partnership income subject to withholding (Form 1042-S or K-1 reporting).
• Exception 1(b) — other income subject to tax withholding by a withholding agent.
• Exception 1(c) — specific withholding agent requirements (e.g., income from gambling winnings reported on Form 1042-S).
• Exception 1(d) — third-party withholding on bank deposit interest.

For a non-resident with a US brokerage account where dividends and interest are being withheld at 30%, Exception 1(b) is typically the right sub-category. For a non-resident with US bank deposit interest specifically, Exception 1(d) is the precise reference.

The practical effect: Form W-7 can be filed without attaching a Form 1040-NR. The supporting evidence demonstrates that you are subject to withholding now (the 1042-S, plus a confirmation letter from the brokerage or bank) and that you need an ITIN to either reduce the withholding going forward or to file the refund claim later.

Who Exception 1 fits well

Exception 1 is well suited for:

• Non-resident individuals with US-domiciled brokerage accounts (IBKR, Schwab, Fidelity) where dividends and interest are being withheld at 30%.
• Non-residents holding partnership interests in US-organised partnerships (real estate funds, hedge funds) that issue K-1s with US-source income.
• Non-residents with US bank deposit interest that has been backup-withheld because no W-8BEN with a US TIN is on file.
• Non-residents whose US LLC bank account generates interest that flows to them as the disregarded entity owner.

Exception 1 is not the right path when:

• The non-resident has US-source income that is not passive — for example, active business income from a US trade or business. That falls under reason (b) with the 1040-NR.
• The non-resident has no current US-source income at all. There is no passive income to anchor the Exception 1 claim.
• The applicant is a US citizen or resident alien. Different forms apply (SSN or different ITIN reason code).

We confirm the right code based on the actual income mix and withholding facts shown on the 1042-S and other supporting documents.

The application package

A clean Exception 1 W-7 package contains:

1. Form W-7 with reason code (h) ticked and Exception 1(a), 1(b), 1(c), or 1(d) identified in the supporting explanation.
2. A letter from the withholding agent (brokerage, bank, partnership) confirming that you are subject to third-party withholding. The W-7 instructions specify what the letter should state; we provide a template that the withholding agent typically completes within a few business days.
3. The most recent Form 1042-S showing the income paid and the tax withheld.
4. Certified passport copy with Certificate of Accuracy from the CAA. The original passport stays with you.
5. A cover letter to the IRS ITIN Operation explaining the Exception 1 basis and listing the supporting documents.

The package goes to the ITIN Operation:

Internal Revenue Service ITIN Operation P.O. Box 149342 Austin, TX 78714-9342

Processing typically completes within the IRS-published 7-week window for routine applications, longer during the January–April peak.

The refund cycle: ITIN first, then 1040-NR

Once the ITIN is issued (you receive a CP565 notice from the IRS), the refund claim is a separate filing. The steps:

1. Use the new ITIN to file Form 1040-NR for the tax year in which the over-withholding occurred. Attach the 1042-S as evidence of the withholding.
2. Claim credit for the withheld amount on the appropriate line of the 1040-NR. If a treaty rate applies, compute the tax at the treaty rate (e.g., 10% China dividend), with the 30% withheld now showing as a payment against that lower liability.
3. Mail the 1040-NR to the IRS address for non-resident filers (different from the ITIN Operation address).
4. Wait for the refund. Non-resident refunds processed through the 1040-NR cycle typically take 6–10 months from filing to receipt. The IRS pays statutory interest on certain refunds depending on the timeline.

The refund-claim window is three years from the original due date of the return in which the credit should have been claimed. For 2024 income on a 1040-NR due 15 June 2025, the refund-claim window closes 15 June 2028.

Fixing the forward problem: updating W-8BEN

The ITIN solves the recovery problem for past withholding. To stop the over-withholding going forward, update your W-8BEN with the brokerage or bank:

1. Log into the brokerage's tax forms portal (every major brokerage has one).
2. Submit a fresh Form W-8BEN with your name, country of residence, ITIN in the US TIN field, and the treaty claim if applicable (Part II of the W-8BEN).
3. Confirm the brokerage has accepted the form and reduced the withholding rate.

After the W-8BEN update, future dividend and interest payments are withheld at the treaty rate (or zero, for certain interest types), eliminating the over-withholding cycle.

A W-8BEN is valid for three calendar years. Plan a renewal date so you do not silently revert to 30% in year four.

Common scenarios

Chinese resident with IBKR account holding US stocks. Receives 1042-S showing 30% on dividends. US-China treaty provides 10%. ITIN under Exception 1(b), then 1040-NR claiming the 20% difference. Forward W-8BEN with ITIN to drop the ongoing rate to 10%.

Indian resident with Schwab brokerage account. Receives 1042-S showing 30% on dividends. US-India treaty provides 25%. ITIN under Exception 1(b), then 1040-NR claiming the 5% difference (smaller absolute amount but same procedure).

UK resident with US LLC bank account earning interest. LLC is disregarded for federal tax purposes; interest flows to the foreign owner. ITIN under Exception 1(d) for the bank deposit interest. UK treaty zero rate on most interest, so the recovery is the full 30% withheld.

Hong Kong resident as limited partner in a US real estate partnership. Receives K-1 showing rental income with backup withholding. ITIN under Exception 1(a). 1040-NR computes the actual partnership-level tax owed and claims credit for the withholding.

When Exception 1 is not enough

A few situations need more than just the ITIN under Exception 1:

• The non-resident has multiple income types — passive from brokerage + active from a US LLC business + real estate. In that case the ITIN application typically anchors to whichever code is cleanest (often reason (b) with the 1040-NR), and the passive items flow into the same return.
• The withholding agent has not yet issued the 1042-S for the relevant year. Exception 1 generally requires the 1042-S as evidence; without it the application is weaker. Wait for the issued form, which arrives by 15 March of the following year for most brokerages.
• The applicant's treaty country has no US tax treaty at all. Without a treaty, the ITIN does not reduce the 30% rate — it just gives you a personal TIN. The withholding remains at the IRS default and may be a final tax depending on the income type.

Frequently asked questions

The FAQ block above covers the most common Exception 1 scenarios. If your situation involves multiple withholding sources, multiple tax years, or a country without a US treaty, an eligibility review maps the recoverable amount and the path before you commit to a package.