If you live in Canada and run a US LLC, the self-employment tax question gets answered three different ways depending on which YouTube video or AI summary you read. The short version: as a Canadian non-resident, you do not pay US self-employment tax on your LLC income. The longer version covers what you do owe on the Canadian side, why the popular "elect S-Corp to save SE tax" advice does not apply to you, and how the Canada-US Totalization Agreement fits in. This post is the decision tree most cross-border articles skip.
30-second answer
A Canadian resident running a US LLC as a non-resident of the US is generally exempt from US self-employment tax. The exemption sits in IRC §1402(b), which limits SE tax to US citizens and US residents. A Canadian non-resident does not meet either status, so the 15.3% SE tax does not attach to LLC business income. You still owe regular income tax on US-source effectively connected income via Form 1040-NR, and you still owe full Canadian tax on worldwide income. CPP contributions and possibly GST/HST may apply on the Canadian side.
Why Canadian non-residents are exempt from US SE tax
Self-employment tax is the self-employed equivalent of FICA, the payroll tax that funds Social Security and Medicare. The statute that imposes it is IRC §1401, and §1402 defines who counts as having "net earnings from self-employment."
| Code section | What it does |
|---|---|
| §1401 | Imposes SE tax at 15.3% (12.4% Social Security + 2.9% Medicare) on net earnings from self-employment |
| §1402(b) | Limits "net earnings from self-employment" to amounts received by US citizens, residents, or Puerto Rico residents |
| §1402(c) | Defines self-employment income (services personally performed, business profit, partnership shares) |
A Canadian who is not a US citizen, has no green card, and does not meet the substantial presence test is a non-resident alien for US tax purposes. By the plain text of §1402(b), there are no "net earnings from self-employment" to tax. The IRS confirms this in Publication 519 and has applied it consistently in guidance.
This applies whether your LLC is a single-member LLC (disregarded entity), a multi-member LLC (partnership), or has elected to be treated as a corporation. The exemption is at the member level, not the entity level.
What you do owe on the US side
SE tax exemption does not mean zero US tax. Income tax still applies to effectively connected income.
| Income type | US tax owed | Form |
|---|---|---|
| ECI (active US trade or business) | Graduated rates 10-37% on net | Form 1040-NR with Schedule C/E |
| FDAP (passive yields, royalties, dividends) | 30% gross or treaty-reduced | Generally collected at source via withholding |
| FIRPTA (US real property gains) | 15% withholding + final reconciliation | Form 8288, Form 1040-NR |
| Form 5472 reporting (SMLLC) | $0 tax but $25,000 penalty for non-filing | Form 5472 + Pro Forma 1120 |
If you have no US trade or business and no US-source FDAP, you may have no US tax obligation at all beyond Form 5472 reporting for an SMLLC. Treaty Article VII often exempts business profits when the Canadian-owned LLC has no US permanent establishment.
What you owe on the Canadian side
Canada treats self-employment differently. As a Canadian resident, you pay full Canadian income tax on worldwide income, including LLC profits. CPP and possibly GST/HST add on top.
Canadian income tax on LLC income
CRA classifies a US LLC as a foreign corporation by default, regardless of how the IRS treats it. Income from the LLC is generally taxed in Canada when distributed to the Canadian member as a dividend, not as it accrues. This creates the classic Canadian LLC timing mismatch.
If you operate the LLC from Canada, the CRA may also assert that the LLC has a Canadian permanent establishment (your home office), and tax LLC profits as Canadian active business income through corporate tax rules. This is the area where cross-border CPAs disagree most.
CPP contributions
Self-employed Canadians pay both the employer and employee portion of CPP on net business income, currently 11.9% on earnings up to the year's maximum pensionable earnings ($71,300 in 2025), with an additional 8% on the second tier. There is no equivalent SE tax exemption on the Canadian side for CRA purposes. CPP is owed on Canadian self-employment income whether you operate through a US LLC or directly.
GST/HST registration threshold
If your worldwide taxable supplies (including services billed through a US LLC) exceed $30,000 CAD over four consecutive calendar quarters, you must register for GST/HST and collect tax on services delivered to Canadian customers. The trigger is on you as a Canadian resident operator, not on the LLC's location.
| Trigger | Action required |
|---|---|
| Revenue under $30K CAD/year worldwide | Voluntary registration only |
| Revenue over $30K CAD/year, all US customers | Registration not required (zero-rated exports) |
| Revenue over $30K CAD/year, mix of US and Canadian customers | Registration required, charge GST/HST on Canadian-supply portion |
| Sales to other countries (UK, EU, Asia) | Generally zero-rated |
The "all US customers" path is common for Canadian SaaS founders. You stay below the registration trigger for Canadian-domestic supplies because the entire stream is zero-rated to US customers.
The Canada-US Totalization Agreement
The Canada-US Totalization Agreement coordinates social security taxation between the two countries. For a Canadian non-resident operating a US LLC, the practical relevance is limited because IRC §1402(b) already exempts you from US SE tax.
| Scenario | Totalization relevance |
|---|---|
| Canadian non-resident, US LLC, exempt under §1402(b) | No certificate needed (already exempt) |
| Canadian who becomes US tax resident under SPT, runs US LLC | Certificate of Coverage from CRA exempts US SE tax for up to 5 years |
| US citizen living in Canada, runs US LLC | Certificate of Coverage from CRA exempts US SE tax (covered under CPP instead) |
Most Canadian-resident LLC owners never need to file the Certificate of Coverage because they were never subject to US SE tax to begin with. The CoC matters when residency status flips or when a US citizen abroad needs to document the exemption.
The S-Corp tax-saving trap (do not fall for this)
The most-watched cross-border tax YouTube videos recommend converting an LLC to an S corporation to save self-employment tax. The strategy: pay yourself a "reasonable salary" subject to FICA and take the rest as distributions free of SE tax. This works for US residents.
It does not work for Canadian non-residents.
IRC §1361 limits S corporation shareholders to:
- US citizens or US residents (individuals)
- Certain estates and trusts
- A small set of qualified retirement plan trusts and tax-exempt entities
Non-resident aliens are explicitly excluded from owning S corporation stock. A Canadian who is not a US tax resident cannot be an S corp shareholder. Filing Form 2553 to elect S corp status while having a non-resident alien shareholder invalidates the election entirely. The IRS will treat the entity as a regular C corporation, and you will face the worst of both worlds: 21% federal corporate tax on profits plus 30% (or treaty-reduced) withholding on distributions.
If your CPA, online video, or AI assistant suggests S-Corp election to save SE tax for your Canadian-owned LLC, stop. This is the most common cross-border tax mistake we see. The right answer is usually one of: stay as an SMLLC disregarded entity, elect Form 8832 to be treated as a C corporation (full corporate tax election), or restructure ownership through a Canadian corporation.
Worked examples by business type
Case 1: Toronto SaaS founder, $200K revenue
Canadian resident, no US visits, sells SaaS subscriptions to US customers via a Wyoming LLC.
| Item | Amount |
|---|---|
| LLC net profit | $200,000 USD |
| US SE tax | $0 (§1402(b) exemption) |
| US income tax | $0 (treaty Article VII, no US PE) |
| Form 5472 | Required, $0 tax |
| Canadian income tax | Full Canadian rate on CAD equivalent |
| CPP | Yes, on net self-employment income |
| GST/HST | No (US sales are zero-rated exports) |
Case 2: Vancouver consultant, mixed clients
Canadian resident consultant, $150K revenue from US clients (LLC) + $50K from Canadian clients (direct invoicing).
| Item | Amount |
|---|---|
| US SE tax on LLC income | $0 |
| US income tax on LLC income | Depends on US PE, often $0 under Article VII |
| Canadian income tax | Full rate on combined $200K |
| CPP | Yes, on combined self-employment income |
| GST/HST | Required (Canadian client supplies > $30K), charge HST on Canadian invoices only |
Case 3: Halifax FBA seller via US LLC
Canadian resident sells inventory through Amazon FBA, $400K revenue.
| Item | Amount |
|---|---|
| US SE tax | $0 |
| US income tax (Wayfair sales tax separate) | Treaty Article VII may exempt under PE storage exemption |
| State sales tax nexus | Triggered by FBA inventory in multiple states |
| Canadian income tax | Full rate |
| GST/HST | No (US-bound sales zero-rated) |
Case 4: Calgary developer, US LLC for client work
Canadian resident builds custom software for US clients, $300K through a Wyoming LLC.
| Item | Amount |
|---|---|
| US SE tax | $0 |
| US income tax | $0 if no US PE; protective Form 1040-NR + Form 8833 recommended |
| Canadian income tax | Full rate |
| CPP | Yes |
| Did "S-Corp election" save SE tax? | No (NRA shareholder ineligible, which would have invalidated the entity) |
Frequently asked questions
I read that "all US LLC owners pay 15.3% SE tax." Is that wrong?
For US residents, that is correct. For Canadian non-residents, it is wrong. The blanket "15.3% SE tax" advice ignores §1402(b)'s residency requirement. Most popular tax videos target US-resident audiences and do not address the non-resident exemption.
My LLC issued me a Schedule K-1 with self-employment earnings reported. Do I owe SE tax?
The K-1 reports your share of partnership income, but SE tax is calculated on Schedule SE only if you are subject to it. As a Canadian non-resident, you do not file Schedule SE and the SE earnings figure on K-1 does not generate US tax liability. You report the K-1 income on Form 1040-NR (effectively connected portion) and apply treaty positions where applicable.
If I become a US resident under SPT, when does SE tax start applying?
SE tax applies for the full tax year in which you meet residency. If you trigger SPT in the middle of a year, you may file as a dual-status alien. The Canada-US Totalization Agreement Certificate of Coverage from CRA can exempt you from US SE tax for up to 5 years if you continue paying into CPP. This is the practical use case for the Totalization Agreement.