1099-K or 1042-S From a US Platform: Canadian Seller Tax

Why did a US platform send me a 1099-K or 1042-S?

A Form 1099-K reports payments processed for a seller. A Form 1042-S generally reports specified US-source income paid to a foreign recipient and any related withholding; the forms serve different purposes.

When a platform files either form, it gives the recipient one copy and files another with the IRS. A 1042-S can be required even when a treaty or other exemption means no tax was withheld. IRS: Form 1099-K, IRS: Form 1042-S instructions.

What to do with the form. Keep it with your sales records and compare box 1a with your own sales and payout reports. A payment being reported on a 1099-K does not by itself make it taxable, and Canadian business income is reported whether or not a form arrived. IRS: What to do with Form 1099-K.

Does receiving either form mean I owe US tax?

Receiving a 1099-K or 1042-S does not establish that a Canadian seller owes US income tax.

For a seller who is not a US tax resident, separate three questions: where the income is sourced, whether the seller conducts a US trade or business, and whether a treaty limits the resulting tax. An exemption from US tax can still leave a US return requirement. IRS: Publication 519.

When can a Canadian seller's income be taxable in the US?

US tax on a Canadian seller's income turns on what was sold and where the sale or the work happens, not on where the buyer or the platform is.

These are starting rules, with exceptions: a sale attributable to the seller's US office can change the result. For purchased goods, the sale is generally treated as made where ownership and risk of loss pass to the buyer. IRS: Publication 519, source of income, 26 CFR 1.861-7(c), 26 CFR 1.863-3(c).

Source is only the first step. A seller engaged in a US trade or business generally has US-source profit from selling goods treated as effectively connected with it; foreign-source income generally is not, unless a US office is involved. A seller with no US trade or business is taxed at the 30% (or lower treaty) rate only on US-source fixed or determinable annual or periodical income, such as royalties; the withholding rules treat gains from selling property as outside that class. IRS: Publication 519, chapter 4, 26 CFR 1.1441-2(b)(2).

Under Article VII, a Canadian treaty resident entitled to treaty benefits generally has US federal tax on business profits only to the extent attributable to a US permanent establishment. Article V covers fixed locations, certain agents and qualifying service activities, so having no US office does not settle it. Canada-US treaty, Articles V and VII.

Why did I get a 1099-K as a Canadian, and how do I stop it?

A Canadian seller usually gets a 1099-K because the platform treated the account as a US payee: no foreign-status form on file, or a US address, US bank account or another sign of a US person. A Canadian address alone does not stop one. To lower the chance of another:

1. Give the platform the right form from the table below, and keep it current.
2. Check that the account's name, address and payout bank match the entity that made the sales.
3. Ask whether the form on file covers payouts already made: the relief depends on documentation held before payment, so a later W-8 may not remove a form already issued; ask whether the platform will correct it.

A US platform need not file a 1099-K for a payee with a foreign address paid to an account outside the US if it holds valid foreign-status documents before paying. If the account shows a US address or US payout instructions, that relief also needs a W-8 collected within 90 days after the platform's contract with the seller, and fails if the platform knows the seller is a US person. A marketplace or payment app must report to the IRS above US$20,000 across more than 200 transactions a year but may send a form below that; payment-card payments have no minimum. IRS: foreign-payee exceptions, IRS: reporting threshold.

The form goes to the platform, not the IRS. If the income is effectively connected with a US trade or business (business carried on in the US), the form can instead be W-8ECI; a W-8 certifies the payee's status, so it has to match the income. A W-8 generally lasts through the third calendar year after signing, but a change that makes it incorrect (income becoming effectively connected or, for an individual, a move to the US) must be reported to the platform within 30 days with a new form; W forms for a Canadian corporation covers corporate completion and renewal. IRS: W-8BEN instructions, IRS: W-8BEN-E instructions.

What if the platform withheld tax and sent a 1042-S?

A 1042-S means the platform treated a payment as US-source income paid to a foreign person, and it reports any tax withheld. Whether that tax is recoverable or creditable depends on why the platform withheld it, which the income code and exemption codes show.

Certain US-source income, such as royalties, can face a default 30% tax on the gross amount when it is not effectively connected with a US trade or business; a treaty may reduce that tax. That is not a blanket tax on all sales through a US platform; for royalties, see Royalties and licence fees from US customers. IRS: fixed or determinable income.

A platform that receives no W-8 from the payee may have to withhold at the 30% rate or at the backup withholding rate of 24% (a share of a payment held back for the IRS); 1099-K box 4 reports backup withholding. IRS: W-8BEN instructions, IRS: Form 1099-K instructions.

For what to check on each 1042-S box, and for the recovery or credit process, see US tax withheld on payments to Canadians.

Do I have to file a US return because of the form?

The form alone does not create a US filing duty. A return may be needed where there is a US trade or business (even if a treaty removes the tax), US-source income that withholding did not fully cover, or a refund claim.

Which return applies depends on the seller's US activities: see Canadian corporation US tax return (and, for missed years, Missed US returns for a Canadian corporation) or, for an individual, Canadian freelancer with US clients.

Filing also decides whether deductions survive. To take deductions and credits against income later found to be US-taxable, a foreign corporation generally must file within 18 months of the return's due date and an individual within 16 months of it; an earlier deadline can apply when the prior year's return was not filed. The 1120-F instructions tell a foreign corporation to file a protective return to safeguard them if its limited US activities produce no effectively connected income, or if it finds no US tax under a treaty (for example, no permanent establishment). A return claiming that income is not attributable to a US permanent establishment generally needs Form 8833 attached unless a waiver applies; failing to disclose can cost US$1,000 (US$10,000 for a C corporation) per failure. IRS: Publication 519, filing information, IRS: 1120-F filing and protective returns, 26 CFR 1.882-4(a)(3), IRS: Form 8833.

What do I report in Canada, and what happens to US tax withheld?

A Canadian-resident seller reports the business's income in Canada, including sales not shown on a US form. Sales and eligible costs are reported separately, not as a net platform payout. CRA: platform tax obligations.

Canadian tax amounts are generally worked out in Canadian dollars at the exchange rate for the day each amount arises; for which rate to use, and the election that lets some corporations report in US dollars, see US-dollar sales and marketplace payouts. CRA: reporting currency, paragraphs 1.3-1.8.

US withholding is not automatically a Canadian credit: the credit is limited, and refunded tax and withholding above the treaty rate are not eligible foreign tax. An unused credit for foreign business-income tax can be carried back 3 years or forward 10 years (Income Tax Act, s. 126(2)). A provincial or territorial credit is claimed separately (Form T2036; Quebec residents use Revenu Québec, per the CRA credit page). See Foreign income on a Canadian return (individual) or Claiming US tax on your corporate return (corporation). CRA: Foreign Tax Credit, paragraphs 1.32-1.38.

How do I tie the form's gross amount to my books?

Reconcile the form to transaction records first, then those records to payouts and Canadian tax reporting. Form 1099-K box 1a does not subtract fees, refunds, discounts or shipping amounts. IRS: gross payment reporting.

A self-employed seller other than a farmer, fisher or commission agent reports income on the accrual basis, which counts income when earned rather than when paid, so a calendar-year form can differ from the income for the reporting period. CRA: T4002, Chapter 1. On the T2125, sales tax, returns, allowances and discounts included in sales are entered at amount 3B, and goods bought or made for sale are claimed in the period they are sold. CRA: T4002, Chapter 2.

For the detailed process, see Reconciling sales and payouts.

Does the CRA see what a platform reports about me?

Canada has its own platform reporting rules, separate from the US forms; a 1099-K or 1042-S does not show whether a platform has a Canadian reporting duty. The closest counterpart to a 1099-K is the information a reporting platform must give each seller it reports.

The rules are in Part XX of the Income Tax Act, and the first reportable period was the 2024 calendar year. A platform operator based outside Canada can also be a reporting platform operator when it facilitates sales or services by sellers resident in Canada. A reporting operator reports each seller's identity, consideration paid or credited, activity counts, and fees, commissions or taxes charged or withheld, and gives the seller that information by January 31 of the following year. A seller for which the operator facilitated only sales of goods, fewer than 30 of them and totalling no more than C$2,800 in the calendar year, is excluded. CRA: platform reporting guidance, paragraphs 2.29, 6.2, 6.3 and 6.11, Income Tax Act, s. 282(1).

The Canadian rules have operator, seller and activity conditions, and software that exclusively processes payments is not a platform. Reported consideration is the net amount paid or credited, unlike 1099-K gross payments, so the totals will differ. CRA: paragraphs 2.5-2.6 and 7.7. For reporting platform income, see How self-employed income is taxed.

What if the form is wrong, duplicated or missing?

Ask the issuer to correct an inaccurate payment form, and report the underlying business transactions once. A missing form does not remove a Canadian resident's income-reporting obligation. A platform required to issue a form must furnish a 1099-K by January 31 and a 1042-S by March 15 of the following year. IRS: 1099-K recipient copy, IRS: 1042-S due date.

1. Compare the payee name, account, period and amounts with your records. Several platforms can mean several 1099-Ks, so check that two forms do not cover the same sales. If the form names you but your corporation made the sales (or the reverse), ask the issuer to correct the payee and keep records showing which entity earned the income.
2. For an incorrect, duplicate or misdirected 1099-K, ask the filer named on the form for a corrected one, showing a zero amount for a duplicate or a form that is not yours. The IRS cannot correct the issuer's form.
3. For an incorrect 1042-S, ask the withholding agent for a corrected recipient copy and any required amendment of the IRS filing.
4. Keep the original, corrected copy and correspondence, and follow the return deadline while the correction is pending.

IRS: incorrect 1099-K, IRS: correcting 1042-S.

Gather the forms, W-8 and acceptance record, payout reports and monthly sales; if US exposure is uncertain, add contracts, shipping terms, production locations and US work dates.

Example

Illustrative only. All amounts are US dollars; the example does not calculate tax or supply an exchange rate.

A Canadian sole proprietor performs services entirely in Canada through a US platform. Form 1099-K shows US$40,000 in gross payments. The platform records US$2,000 of refunds and US$3,000 of fees, leaving US$35,000 paid to the seller. Assume no sales tax, withholding, other costs or timing differences.

On the T2125, the US$40,000 of gross payments goes at amount 3A and the US$2,000 of refunds at amount 3B, giving US$38,000 of sales after refunds at amount 3C. The US$3,000 fee is a separate expense, leaving US$35,000 before other expenses. Canadian reporting uses the corresponding Canadian-dollar amounts.

The form alone does not establish US tax or a US return obligation. Work performed entirely in Canada is generally foreign-source for US purposes; any other US business activities still need review.

Different for you?

• You performed services in the US: see Canadian freelancer with US clients.
• You hold inventory in a US warehouse: see Canadian sellers with US inventory.
• The payment is for licensing: see Royalties and licence fees from US customers.
• You need to assess sales tax: see Foreign sellers and sales tax for US sales tax and Charging GST/HST to US customers for GST/HST.
• Your sales run through a US LLC or US corporation: the form may name that entity, not you; see Canadian owner of a US LLC or Canadian owner of a US corporation.
• You spend long stays in the US: enough days can make a Canadian a US tax resident, and a W-8 is then wrong; see Snowbirds and US residency.
• You are a US citizen or green card holder: see Americans living in Canada and, for a 1099-K as a US taxpayer, Online seller income tax.
• A corporation has uncertain US activities or treaty eligibility: bring the forms and records for cross-border tax review.