Where Sioux Falls and Canada Connect
BOMCAS is based in Edmonton and works on both sides of the border. Sioux Falls's links to Canada come through its hospitals and universities, its manufacturers and processors, and the regional retail and service trade. A Canadian nurse working at a Sioux Falls hospital, a Manitoba supplier shipping to a Sioux Falls plant, a Canadian student at Augustana University or the University of Sioux Falls, and a Sioux Falls family moving to Alberta each need a different set of filings. We prepare the U.S. and Canadian sides together so they agree.
Treaty and residency rules that apply anywhere in the state are on our South Dakota cross-border tax page; this one looks at how Canadians connect with Sioux Falls in particular.
Canadian Health Care Professionals in Sioux Falls
Sanford Health and Avera Health are the city's two largest employers, and health systems across the United States recruit Canadian nurses and other professionals. A Canadian who moves to Sioux Falls for a hospital job usually becomes a U.S. tax resident, either through a green card or under the substantial presence test, which counts days in the United States over three years. In the first year:
- The U.S. return may be a dual-status return, or the year may be split under special first-year rules.
- Canada generally treats the person as an emigrant from the departure date. That brings a final Canadian return and a deemed disposition of certain property.
- RRSPs and RRIFs keep treaty treatment that defers U.S. tax on their growth, but TFSAs and RESPs can bring U.S. tax and reporting.
- Canadian bank and investment accounts totalling more than $10,000 at any time in the year must be reported on an FBAR (FinCEN Form 114), due April 15 with an automatic extension to October 15.
Because South Dakota has no income tax, the U.S. side is federal only, unless the person also works in Minnesota or Iowa.
Canadian Students and Researchers
Canadians studying at Augustana University, the University of Sioux Falls or the city's other colleges, or training at the Sanford School of Medicine programs in the city, are often exempt individuals for the substantial presence test while on student status. They usually file Form 8843 and, if they have U.S. income, a nonresident return. Scholarships, stipends and on-campus wages each have their own rules and treaty articles. Back in Canada, they generally remain Canadian residents and file there.
Canadian Suppliers and Service Firms Selling Into Sioux Falls
Canadian businesses sell equipment, ingredients, packaging, software and services to Sioux Falls manufacturers, processors, clinics and retailers. South Dakota's remote seller law applies to them: once gross revenue from sales delivered into South Dakota exceeds $100,000 in the current or previous year, they must register and collect state sales tax and the local tax at each delivery address. That is the Sioux Falls 2 percent rate for most city deliveries, and from January 1, 2027, Lincoln County's 0.5 percent county tax for deliveries into that county. Because South Dakota taxes most services, a Canadian marketing, design or IT firm with Sioux Falls clients can be caught as well.
At the federal level, a Canadian company without a permanent establishment in the United States is generally protected from U.S. income tax by the Canada–U.S. tax treaty, but it may need to file a U.S. return disclosing that position. Sioux Falls customers will usually ask for Form W-8BEN-E.
Canadians Owning Property in Sioux Falls
Some Canadians buy Sioux Falls rental property, often for family members studying or working in the city. If the owner does nothing, the tenant or property manager must withhold 30 percent of every rent payment, with no deduction for expenses. Electing instead to pay tax on the net rental profit, through an annual U.S. nonresident return, usually costs far less. A sale is generally subject to FIRPTA withholding by the buyer unless an exception or reduced withholding certificate applies. In Canada, the property is reported on the owner's return and on Form T1135 if total foreign property cost exceeds $100,000, with foreign tax credits for the U.S. tax.
Sioux Falls Residents Moving to Canada
Sioux Falls professionals and families sometimes move to Canada for work. U.S. citizens keep filing U.S. returns every year wherever they live, and they start filing Canadian returns on worldwide income. Retirement accounts, U.S. brokerage accounts and any Sioux Falls home that is kept or rented out all need planning before the move. We map the move with you and prepare both countries' returns afterwards.
How We Work
We start by mapping residency, income sources and treaty positions for each person and business, then prepare the U.S. and Canadian filings together. Cross-border outcomes turn on small facts, such as move dates and account types, so treat this page as a starting point for a conversation.
Sioux Falls Cross-Border Tax Questions
I'm a Canadian nurse moving to Sioux Falls. What do I file?
Usually a U.S. federal return as a new resident, possibly dual-status in the first year, and a final Canadian return as an emigrant. South Dakota has no state income tax. FBAR reporting applies if your Canadian accounts total more than $10,000.
Does a Canadian supplier have to collect Sioux Falls sales tax?
Yes, once its gross revenue from sales into South Dakota exceeds $100,000 in the current or previous year. It collects state tax plus the local rate at each delivery address, which is 2 percent for most Sioux Falls deliveries.
Do Canadian students in Sioux Falls file U.S. returns?
Most file Form 8843, and a nonresident return if they have U.S. income such as campus wages or taxable scholarships. Student status generally keeps them exempt from the substantial presence test.
I'm Canadian and own a rental in Sioux Falls. How is it taxed?
By default the tenant or manager withholds 30 percent of the rent. Electing to be taxed on net profit with a yearly U.S. nonresident return is usually cheaper, and the Canadian return then claims a credit for the U.S. tax.
Talk to BOMCAS About Cross-Border Tax in Sioux Falls
Canadians in Sioux Falls usually need the U.S. side handled through personal tax preparation or business tax preparation, and Canadian suppliers often need Sioux Falls sales tax registration. Companies opening here typically add bookkeeping and payroll, tax planning covers the timing of a move, and anyone with missed filings can begin with back taxes and late filing. The statewide rules behind the rest of our work are explained on our South Dakota pages for business tax preparation, personal tax preparation, sales and use tax, bookkeeping, payroll, tax planning and back taxes and late filing, and the South Dakota overview brings them together.
Send us a short note about your Sioux Falls situation and we will come back with next steps. Reach us through the BOMCAS contact page or the form below, call 780-667-5250 or email info@bomcas.ca. You can also return to the Sioux Falls overview. Nothing on this page is advice for your specific circumstances.