Everything we publish, in one place
Free to read, nothing to fill in first. Rates and thresholds state the tax year they apply to, and anything we are not certain of is described rather than quoted.
Free e-book library
Long-form guides on the filings this practice runs every day — departure years, dual filings, transfer pricing files, cross-border estates. Free to read, no email gate.
21 guides
Open free e-book libraryTax calculators
Work out corporate tax, personal tax, and salary against dividends before you commit to anything. Every figure states the tax year it uses.
25 calculators
Open tax calculatorsCross-border tax answers
Direct answers to the questions people actually arrive with — late filings, foreign property, departure tax, treaty positions.
808 answers
Open cross-border tax answersCross-border tax glossary
Plain definitions for the terms the CRA and the IRS use without explaining, each one linked to the pages where it matters.
322 terms
Open cross-border tax glossaryCountry corridors
What changes when money, work or residence crosses one specific border, corridor by corridor rather than country by country.
25 corridors
Open country corridorsSide-by-side comparisons
Two regimes, two structures or two filing routes set against each other, so the trade-off is visible before you pick one.
31 comparisons
Open side-by-side comparisonsArticles
Longer pieces on rules that changed, deadlines that moved, and filings that go wrong in a predictable way.
60 articles
Open articlesWant one of these applied to your own file? The helpline is open 24 hours, the fee is agreed in writing before any work starts, and 18,000+ clients have already been through the process. Book a consultation.
What these engagements turn on
Residency Changed Mid-Year and Both Returns Assumed a Full One
A move part-way through a year produces two part-year positions, not two full ones. The engagement establishes the date residence actually changed, allocates income either side of it, and amends whichever return was filed on the wrong footing.
Read how this one runsA Canadian Landlord With Property in the United States
Gross withholding on US rents takes no account of mortgage interest, tax or repairs, so a leveraged property can face tax on turnover. An election onto net basis fixes that, and it has its own timing and its own filing.
Read how this one runsAn Estate Using Its Graduated Rates in Time
The favourable rate treatment an estate can access is time-limited and conditional, and it is lost by administration rather than by decision. The file identifies the window and the filings that keep it open.
Read how this one runsDocumentation Built to the US Standard
The US requirements differ from the OECD-aligned ones in what has to exist at the time of filing, and a file prepared for one regime can leave the other unprotected. The engagement builds to whichever governs.
Read how this one runsA US LLC Owned From Canada
The two countries classify the vehicle differently, so relief that ought to apply frequently does not and the same profit can be taxed in both hands. The engagement examines whether the structure can be changed and what the change itself costs.
Read how this one runsAn Assignment Priced on an Equalisation Promise
A policy that leaves the assignee no better or worse off has to be computed, not just stated, and the hypothetical deduction runs alongside the real one. The engagement builds both and reconciles them at year end.
Read how this one runsAn NRI Selling Indian Property With Tax Withheld on the Price
Withholding on a sale by a non-resident is applied to the sale value rather than to the gain, so it routinely exceeds the tax due. A lower-deduction certificate obtained before completion avoids locking the difference up until a return is assessed.
Read how this one runsA Penalty Argued on the Facts Rather Than the Form
Reasonable cause is a documented story with dates, not an assertion of good intent. The engagement assembles what the client actually knew and when, and puts the sequence in writing alongside the filings it explains.
Read how this one runsAll case studies — every published engagement in one place.
Core International & Cross-Border Tax Services
International Tax Planning & Advisory
Strategy and compliance for income, assets and families spread across borders.
U.S. & Cross-Border Tax Returns
Expat & Emigration Tax
Non-Resident Canadian Tax
Transfer Pricing & BEPS
Tax Treaties & Withholding
Cross-Border Estates & Trusts
Global Investments & Reporting
Cross-Border Corporate Tax
India Tax for NRIs & Returning Residents
Canadian Tax with a Foreign Element
UAE Tax for Expats & Their Home Country
Industries & Client Types We Serve Worldwide
Global E-commerce & Marketplaces
- Foreign VAT / GST / sales tax registrations
- Marketplace withholding reviews
- Inventory nexus & PE analysis
- Multi-currency books reconciled
Technology & SaaS
- Cross-border revenue sourcing & withholding
- IP structuring with real substance
- Equity for cross-border teams
- U.S. expansion: entity & PE setup
Professional Services Firms
- Reg 105 / 102 waivers
- Permanent establishment risk
- Partner mobility planning
- Cross-border withholding recovery
Cross-Border Real Estate
- Section 216 rental returns
- FIRPTA withholding recovery
- Section 116 clearance
- Treaty credit optimization
Importers, Exporters & Manufacturers
Related-party purchasing, customs value versus transfer price, and foreign-affiliate structures put trading businesses inside the s.247 documentation rules.
Goods crossing a border move the tax question from income to indirect: registration thresholds, place of supply, the customs value and the transfer price between related entities all have to agree with each other. When they do not, the adjustment arrives from two authorities at once and each one uses the other's number.
- Transfer pricing documentation (s.247)
- Customs value vs transfer price
- Foreign affiliate reporting (T1134)
- Country-by-country reporting
Athletes, Artists & Entertainers
- Reg 105 & U.S. CWA agreements
- Multi-state & country calendars
- Touring income allocation
- Royalty & image-rights withholding
Remote Workers & Digital Nomads
- Residency analysis before moving
- Employer payroll exposure
- Totalization & social security
- Foreign tax credits
Investment Funds & Holding Companies
- Treaty access & PPT reviews
- FAPI & surplus computations
- Withholding-efficient routing
- Governance & substance
