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Cross-Border Tax Specialists

U.S. & Cross-Border Tax Services

Specialized tax filing for U.S. citizens, green card holders, and cross-border clients living in Canada.

Stay compliant with both CRA and IRS while avoiding double taxation.

Who Needs to File U.S. Taxes?

U.S. Citizens & Green Card Holders

U.S. citizens and green card holders living in Canada generally must report their worldwide income to the IRS, even if they also file a Canadian return.

Recent Movers

People who moved into or out of the U.S. during the year and earned income in any state may need to file a non-resident alien (1040NR) return and, in some cases, state tax returns.

U.S. Investment Income

Individuals with U.S. investment income or rental properties may have U.S. filing obligations even if they live in Canada.

Dual Filers

Dual filers often have to coordinate Canadian and U.S. tax rules to make sure they don't pay tax twice on the same income.

IRS + CRA

Coordinating Both Systems

Important to Know

If you're a U.S. citizen, green card holder, or you have U.S. income, you may need to file a U.S. return even if you haven't lived there for years.

Using the Canada–U.S. Tax Treaty to Avoid Double Taxation

Canada and the United States have an extensive tax treaty designed to prevent the same income from being taxed twice.

How Sigma Tax Helps

Determine which country has the first right to tax specific types of income.

Claim foreign tax credits and treaty benefits correctly.

Coordinate filing deadlines and documentation for both CRA and IRS.

1

Identify Reporting Requirements

Determine what needs to be reported in each country based on your specific situation and income sources.

2

Minimize Double Taxation

Use the treaty provisions and foreign tax credits strategically to minimize or eliminate double tax on your income.

3

File Everything On Time

Ensure all required forms and disclosures are filed on time to maintain compliance with both tax authorities.

Expert Treaty Navigation

Our cross-border specialists understand the nuances of the Canada-U.S. Tax Treaty and can help you maximize your benefits while staying fully compliant.

Our U.S. & Cross-Border Tax Services

Comprehensive tax solutions for individuals and businesses with U.S. connections

U.S. Individual & Non-Resident Returns (1040, 1040NR)

Prepare and file U.S. returns for citizens, green card holders, and non-residents with U.S. income.

LLC & Entity-Related Filings

Assist with tax filings for LLCs and other U.S. entities connected to Canadian residents.

IRS Audits & Appeals

Help respond to IRS letters, reviews, and audits, and guide clients through the appeals process when needed.

Foreign Reporting & TDF/FBAR

Assist with foreign bank and financial account reporting and other disclosure forms so clients stay compliant.

Grantor Trust Setup & Reporting

Provide guidance on the setup and tax treatment of grantor trusts with U.S. connections.

U.S. Corporate Tax (S Corp, C Corp, Non-Resident Corp)

Prepare corporate returns and advise on tax matters for U.S. corporations owned or controlled by Canadian residents.

Whether you're an individual with U.S. filing requirements or a Canadian business with U.S. operations, our team can coordinate both sides of your tax picture.

Common Situations We Help With

Real-world cross-border scenarios our clients face every day

Long-Term Expats Who Haven't Filed Recently

U.S. citizens living in Canada for many years who haven't filed U.S. returns recently and are unsure where to start or what their obligations are.

Very Common

Temporary U.S. Workers

Canadians working temporarily in the U.S. who receive U.S. employment income and need both Canadian and U.S. filings to properly report their earnings.

Dual Filing

Cross-Border Commuters & Remote Workers

Cross-border commuters and remote workers being paid by a U.S. employer while living in Canada, navigating complex withholding and reporting requirements.

Complex

U.S. Rental Properties & Investments

Canadian residents with U.S. rental properties or investments who must report this income properly in both systems and optimize their tax position.

Investment

Does Your Situation Sound Familiar?

Let's discuss your specific cross-border tax needs and create a solution that works for you.

Schedule a Consultation

U.S. Tax FAQ

Common questions about U.S. and cross-border tax obligations

Have More Questions?

Every cross-border tax situation is unique. Schedule a consultation to discuss your specific circumstances.

Contact Us Today

Need Help With U.S. or Cross-Border Taxes?

Tell us about your situation and we'll guide you through your obligations in both Canada and the United States.

Book a Cross-Border Consultation

Offices in Toronto, Brampton, North York, Oakville & Richmond Hill