US-Canada Cross Border Tax Accountant in Mississauga
For businesses selling into the US and people with tax on both sides. One team prepares both returns, so you don't pay twice.
30 min · no obligation
Featured in The Globe and Mail & Yahoo Finance
Brands we work with
Our Cross-Border Tax Services in Mississauga
For goods moving south and people living on both sides.
Most common
Shopify & Amazon Cross-Border
US sales tax nexus, inventory in US warehouses, FBA state registrations, payout reconciliation.
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US LLC & Corporation Setup
LLC or C-Corp, EIN, state choice and Form 8832.
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IRS penalty for a missed Form 5472. Per form, per year.
States plus DC with sales tax nexus rules.
US Entity Filings
Form 1120, 1120-F, 5472, state returns.
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Personal Cross-Border Tax
US citizens in Canada, US income or property, FBAR.
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SAL Can Help You If…
01
You store inventory in a US warehouse or 3PL and do not know if that triggers nexus.
02
You crossed a state threshold and haven’t registered.
03
You are importing into the US and unsure who should be importer of record.
04
You’re a US citizen in Canada and haven’t filed US returns in years.
Choose Your Cross-Border Tax Need
Form 1040 or 1040-NR, FBAR, foreign tax credits and T1135, filed with your Canadian return.
Sales Tax & Nexus Compliance
Economic and physical nexus tracking across states, registrations, marketplace facilitator rules, and ongoing filing calendars.
US Entity Setup & Filings
Structure review, entity choice, EIN and registered agent, then Forms 1120, 1120-F and 5472 filed on time.
Customs & Transfer Pricing
Importer of record decisions, duty and landed cost treatment, intercompany pricing.
Personal US-Canada Returns
Form 1040 or 1040-NR, FBAR, foreign tax credits and T1135, filed with your Canadian return.
What Mississauga Clients Say
Real reviews from our Mississauga Google profile.
01
Free 30-minute call
You tell us where you sell and what you ship. We tell you, on the call, where we think your exposure sits.
02
Nexus review
We map every state you have crossed into, physically or economically, and check whether your entity is the right one.
03
Catch-up filings
We register you where you should already be, and use voluntary disclosure where the back years are exposed.
04
Ongoing filings
State sales tax returns, federal and state entity filings, and a calendar so nothing arrives as a surprise.
Why SAL
One Team, Both Returns
Your Canadian and US returns are prepared together, so the numbers match on both sides.
CRA and IRS Audit Support
If the CRA or IRS asks questions, we handle it at no additional fee.
Transparent Pricing
Scope and fees agreed upfront. You know what you are getting before work starts.
Our Mississauga Location
SAL Accounting, 55 Village Centre Pl, Suite 734, Mississauga, ON L4Z 1V9 · (416) 848-8470 · View on Google Maps
Not Sure What You Need to File?
A free 30-minute call with our cross-border team. You’ll leave knowing what’s due on each side of the border.
Frequently Asked Questions
Answered by our Mississauga cross-border team.
Does storing inventory in a US warehouse create nexus?
Yes, in almost every case. Inventory sitting in a state, your own warehouse, a 3PL, or an Amazon fulfilment centre, is physical presence in that state. It creates sales tax nexus from the first unit, with no dollar threshold to clear first. If you use FBA and Amazon moves your stock, you can pick up nexus in states you never chose.
What are the economic nexus thresholds?
Most states use $100,000 in sales into that state over twelve months, and some also count 200 separate transactions. A handful sit higher, California and Texas are at $500,000. The measurement period and whether marketplace sales count differ by state, which is why we track it per state rather than by rule of thumb.
I sell on Amazon FBA. Do I still need to register in each state?
Often yes. Marketplace facilitator laws mean Amazon collects and remits sales tax on your Amazon orders, but that does not always remove your own registration and filing obligation, and it does nothing for your Shopify or wholesale sales into the same state. Where you hold inventory, you usually still need to be registered.
Who should be the importer of record?
It depends on whether you want title to pass in Canada or in the US. If your US entity is importer of record, it takes on duty, customs compliance and the paperwork, and that supports a cleaner transfer pricing story. If your customer is importer of record, you avoid the burden but complicate the sale. We work this out before your first shipment where possible.
Do I charge HST on sales to US customers?
Generally no. Goods exported to a US customer are zero-rated for GST/HST, so you charge 0% and still claim input tax credits on your costs. You need export documentation to support it. Digital services and services to US customers follow different place-of-supply rules.
Which state should an Ontario seller incorporate in?
Delaware is the default answer and often the wrong one for a goods business. If your inventory, staff and customers concentrate in one state, incorporating there avoids foreign qualification fees and duplicate filings. Wyoming and Nevada are cheap but do not remove obligations in states where you actually operate.
Do I need to file Form 5472?
If you own a US corporation or a single-member LLC and you are a foreign person, and there were reportable transactions with you during the year, yes. That includes capital contributions and loans, not just sales. The penalty for missing it is $25,000 per form per year, and it applies even when the entity had no income.
LLC or C-Corp for a Canadian business selling into the US?
The CRA treats a US LLC as a corporation while the IRS may treat it as a flow-through, and that mismatch can cost you foreign tax credits. For most Canadian companies expanding into the US, a C-Corp subsidiary is the cleaner structure. The right answer depends on who owns it and how profits come back to Canada.
I'm a US citizen living in Mississauga. Do I still file US taxes?
Usually, yes. The US taxes its citizens on worldwide income, wherever they live. If your income is above the US filing threshold, you file a US return every year as well as your Canadian one. Foreign tax credits and the treaty mostly stop you paying twice, but only if both returns are prepared to work together.
Do I need to file an FBAR?
If you’re a US person and your non-US bank and investment accounts add up to more than $10,000 at any time in the year, yes. That’s the combined total, not each account. If you’ve missed past years and it wasn’t deliberate, the IRS Streamlined procedures usually let you catch up.
What does cross-border tax work cost?
It depends on how many states you’re in, whether you have a US entity, and if personal returns are involved. We quote before we start. See our cross-border pricing page for typical ranges.
Is there a cross-border tax accountant near me in Mississauga?
Yes. Our office is at 55 Village Centre Place, Suite 734, Mississauga. We work with clients across Oakville, Brampton, Milton, Burlington, Etobicoke, Streetsville, Port Credit and Meadowvale.
