KDP royalties and the 30 percent that never had to leave

The treaty rate on book royalties is zero — if you claim it

US payers must withhold 30 percent from royalties paid to non-residents unless a treaty says otherwise, and the Canada-US treaty says a lot: the general royalty rate drops to 10 percent, and copyright royalties on literary work are exempt from US withholding entirely. For a self-published author, that means the correct withholding on KDP and IngramSpark royalties is zero — but the treaty does not apply automatically. You claim it inside each platform's tax interview, which generates a W-8BEN on your behalf.

The step that used to stall everyone — getting a US tax number — is largely gone. The tax interview accepts your Canadian SIN as the foreign tax ID, so most authors never need an ITIN or EIN to stop the withholding going forward. The claim expires and platforms re-prompt you; letting the interview lapse quietly restarts the 30 percent.

Audiobooks follow the same script. ACX royalties come from a US Amazon entity, so the treaty claim has to be made there too — completing the KDP interview does not carry over. The same goes for a foreign-rights deal with a US publisher: the advance and royalty stream sit under that publisher's withholding paperwork, and the 1042-S it issues should reconcile to the royalty statements line by line. And the W-8BEN itself is not permanent — it generally holds for three calendar years, so a claim made when you published book one can quietly lapse by book four.

Recovering tax already withheld: the 1042-S route

Withheld money comes back from the IRS, not from CRA. Each March the platform issues a Form 1042-S showing gross royalties and US tax withheld; filing a 1040-NR for that year claims the treaty exemption and requests the refund. The 1040-NR does need an ITIN, and the W-7 application can travel with the return itself — slower than we would like, but it works, and refund claims generally stay open for three years.

The common mistake is claiming the 30 percent as a foreign tax credit on the Canadian return instead. CRA limits the credit to tax the treaty actually allows the US to keep — which for book royalties is nothing — so the credit gets denied and the money is stranded unless you go back to the IRS. Recover it where it sits.

The Canadian side: everything is taxable, in Canadian dollars

Canadian residents report worldwide royalties on T2125 as business income — KDP, Ingram, Kobo, audiobook platforms, foreign-rights deals — converted at the exchange rate when earned. Advances are income too; they are not loans. Against that sit real deductions: editing, cover design, Amazon Ads spend, formatting software, conferences and a home-office claim. We book royalties gross and platform fees as expenses so the numbers reconcile to the 1042-S and the dashboard, not just to bank deposits.

Timing trips authors more than anything else. KDP pays roughly sixty days after month end, so December sales land as income in the year they were earned on an accrual view — and an author whose royalties jumped mid-year can meet a first instalment notice from CRA before the cash pattern feels real. A simple royalty schedule by platform and month keeps both problems visible early.

GST/HST: royalties from non-resident platforms are zero-rated

Royalties from Amazon and Ingram are payments from non-residents, and those supplies are generally zero-rated — no HST to charge. They still count toward the $30,000 small-supplier threshold, and registering once you cross it (or voluntarily before) turns the file into a refund position, because you claim input tax credits on editing, design and ad spend while collecting nothing. Direct sales are the exception: a book table at an Ontario festival is taxable once registered, while direct sales shipped to US readers are zero-rated exports.

Where this fits

The cross-border layer sits on top of an ordinary author file — royalty tracking, advances, expense discipline and instalments — which our author tax services page covers. For W-8BEN setups, 1040-NR recoveries and the rest of the Canada-US practice, see cross-border tax services. Boutique firm, fixed fees quoted after a discovery call.

Source: IRS — About Form 1042-S, Foreign Person's US Source Income Subject to Withholding.