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NZ tax · Reviewed 2026-05-02

US withholding tax + the W-8BEN form.

By default the IRS withholds 30% on US dividends paid to non-US persons. With a W-8BEN form filed via your broker, NZ residents drop to 15% under the NZ–US Double Tax Agreement — and the 15% can usually be claimed as a foreign tax credit against your NZ tax bill.

The default vs the treaty rate

When a US-listed ETF (SPY, VOO, QQQ, etc.) pays a dividend, the IRS treats the recipient as US-source income and applies a default 30% withholding tax to non-US persons[2].

NZ residents fall under the NZ–US Double Tax Agreement (DTA). Article 10 of the DTA caps the withholding rate on portfolio dividends at 15%, provided the recipient certifies their NZ tax residency[1]. The certification mechanism is IRS Form W-8BEN, filed via your broker.

On NZ$1,000 of US ETF dividends, that's the difference between US$300 withheld (no W-8BEN) and US$150 withheld (W-8BEN on file). The 15% you do pay is generally claimable as a foreign tax credit on your NZ IR3[3].

How to file

You don't file with the IRS yourself

  1. Account opening. When you open a US-market account on Hatch, Stake, Sharesies, or Interactive Brokers, the platform onboarding asks for your tax residency and walks you through the W-8BEN. You sign electronically; the broker holds the form.
  2. Re-cert every three years. The W-8BEN expires after 3 years from signing. Your broker prompts you to re-sign; if you ignore the prompt, withholding reverts to 30% on the next dividend.
  3. Update on residency change. If you become non-NZ-resident for tax purposes, file a new W-8BEN reflecting the change — the treaty rate depends on your actual tax residency.
  4. Verify on a payslip. Your platform's annual tax report shows withholding actually applied. If you see 30% lines, your W-8BEN isn't current.

Sources

  1. [1]NZ–US Double Tax Agreement (Article 10 — Dividends) — Inland Revenue (NZ) (2026)
  2. [2]IRS Form W-8BEN (current revision) — Internal Revenue Service (US) (2026)
  3. [3]Tax credits — overseas tax paid (NZ side) — Inland Revenue (NZ) (2026)

Continue with

FIF explained

When the FIF regime applies to your US ETF holdings.

FDR vs Comparative Value

Method choice once FIF kicks in — and how the W-8BEN credit interacts.

PIE vs FIF

Skip US withholding entirely with NZX-listed PIE wrappers.

How to buy US ETFs from NZ

Account opening + W-8BEN walkthrough across NZ platforms.

FAQ

Where do I file the W-8BEN?⌄

You don't mail it to the IRS yourself. Your broker collects it on account opening and re-collects it every three years. Hatch, Stake, Sharesies (US market), and Interactive Brokers all walk you through the W-8BEN as part of US-account setup. If you're not sure whether yours is current, check the tax-document section of your platform.

What if I forget the W-8BEN?⌄

The IRS withholds 30% on US dividends instead of the treaty 15%. The 15% gap is generally not recoverable retroactively without a US tax filing. The fix is straightforward — refile the W-8BEN through your broker — but the forgone tax credit on past dividends is usually unrecoverable.

Can I claim the 15% as a NZ tax credit?⌄

Yes, in most cases. The 15% US withholding tax can typically be claimed as a foreign tax credit against your NZ tax liability on the same income — preventing double taxation under the NZ–US Double Tax Agreement. The mechanics differ between FDR and CV methods; check IR461 or your accountant.