Cross-border tax terms — W

7 terms beginning with W, each defined at mechanism level.

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What each entry gives you is the mechanism: the condition that triggers the term, and the consequence that follows. Amounts and rates belong on the filing pages, where they carry a tax year and a source.

Terminology is where cross-border risk hides. The rate is visible and gets checked; the classification is invisible and does not, which is why the classification is what usually goes wrong. Each term page therefore says what the word means, why it bites, and which of our pages it actually changes.

If a term like this is in a notice you have received, bring the notice. The definition matters far less than what the sender is actually asking for. Every page here carries the name of the person who reviewed it and the date they did.

  • Worldwide income — All income wherever it arises.
  • Withholding tax — Tax collected by the payer at the moment of payment, on the strength of the documentation the payer holds.
  • Withholding agent — The person required to withhold and remit.
  • Withholding certificate — An advance determination reducing withholding on a transaction to the tax actually expected — worth many times more applied for before closing than after.
  • Wrapped asset — A token representing another asset.
  • Wash sale — A sale and repurchase intended to realise a loss, restricted by rules in several systems including superficial-loss provisions.
  • W-8BEN — The individual certificate of foreign status given to a US payer to claim a treaty rate.

What the W entries have in common

7 terms begin with W. The term below is defined in full on its own page, alongside the filings it governs and the fee for dealing with them. Three to start with: Worldwide income, Withholding tax and Withholding agent.

Nearby letters

V — 2 terms · Z — 1 term. The full A–Z lists all 297 terms in one place.

Back to the full glossary · Cross-border tax answers · Side-by-side comparisons

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Get a cross-border question handled for a fixed fee

One call to the 24-hour helpline is enough to tell you what has to be filed, what it costs, and whether you need us at all.

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Files that look like this one

Case study 1

An Adjustment in One Country and No Relief in the Other

A pricing adjustment taxes the same profit twice unless the other country makes a corresponding one. The mutual agreement route is what produces that relief, and it is opened on a timetable set by the treaty rather than by either revenue authority.

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Case study 2

A Canadian Working in the US on a Work Visa

Immigration status and tax residence are different tests, and a visa says nothing about which country taxes the salary. The file fixes residence, applies the employment article, and sequences the two returns so the credit lands where it is usable.

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Case study 3

The Same Income Taxed Twice on Paper

Relief usually exists and is lost to sequence: one country taxes at source and the other credits it, and preparing them in the wrong order claims a credit against a figure nobody has computed.

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Case study 4

A Student or Researcher Covered by a Treaty Article

Several treaties carry a dedicated article for students, trainees and visiting researchers that displaces the ordinary employment rules. Whether it applies turns on the purpose of the stay and the source of the funds, both of which are evidenced rather than asserted.

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Case study 5

A Taxable Presence Created Without an Office

A dependent agent habitually concluding contracts can create a permanent establishment where there is no premises at all. The review tests what the person actually does against what the treaty describes.

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Case study 6

Paid for Work Done in Canada While Living Elsewhere

Employment carried out in Canada is taxable here even where the employer and the bank account are not. The engagement establishes how many of the days were worked in Canada, applies the treaty employment article, and deals with the withholding the payer has already taken.

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Case study 7

Trips That Added Up to a Filing Obligation

Short visits are tracked against a treaty threshold that is measured over a moving window rather than a calendar year. Where the threshold is passed, the obligation reaches back over the whole period.

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Case study 8

A Country-by-Country Report and Who Files It

The obligation sits with the group and the filing can fall on a surrogate where the parent's jurisdiction does not exchange. Establishing who files where comes before preparing anything.

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All 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.

One coordinating team: filings on every side of the border are sequenced so treaty relief and foreign tax credits are claimed once — and in the right country.

U.S. & Cross-Border Tax Returns

Dual filers: U.S. citizens in Canada and Canadians with U.S. income run two parallel systems — we prepare both, in the right order, every year.

Expat & Emigration Tax

The move year is its own project: the elections and valuations filed that year decide the next decade of both countries’ returns.

Non-Resident Canadian Tax

Default withholding is 25% of gross: elective returns routinely turn over-withheld rent and pensions into refunds.

Transfer Pricing & BEPS

Documentation prepared with the return is the cheapest insurance in international tax; reconstructing it during an audit is the most expensive.

Cross-Border Estates & Trusts

Wills drafted for one country routinely misfire in the other — deemed disposition here, estate tax there, credits in between.

Cross-Border Corporate Tax

Expansion raises the same four questions every time — entity, PE, repatriation, payroll. We answer them before the tax authorities do.

India Tax for NRIs & Returning Residents

The deduction is taken on the sale price, not the gain — which is why an NRI property sale strands cash unless the certificate is applied for before closing.

Canadian Tax with a Foreign Element

Residency is decided on facts, not on a form — and the year you arrive or leave is the one where the largest amounts turn on the smallest details.

UAE Tax for Expats & Their Home Country

A zero-tax country is only half the answer — the question that decides the bill is whether the country you came from still treats you as resident.

Industries & Client Types We Serve Worldwide

Global E-commerce & Marketplaces
Technology & SaaS
Professional Services Firms
Cross-Border Real Estate
Importers, Exporters & Manufacturers
Athletes, Artists & Entertainers
Remote Workers & Digital Nomads
Investment Funds & Holding Companies

Global E-commerce & Marketplaces

  • Foreign VAT / GST / sales tax registrations
  • Marketplace withholding reviews
  • Inventory nexus & PE analysis
  • Multi-currency books reconciled
Explore E-commerce & Marketplaces

Technology & SaaS

  • Cross-border revenue sourcing & withholding
  • IP structuring with real substance
  • Equity for cross-border teams
  • U.S. expansion: entity & PE setup
Explore Technology & SaaS

Importers, Exporters & Manufacturers

  • Transfer pricing documentation (s.247)
  • Customs value vs transfer price
  • Foreign affiliate reporting (T1134)
  • Country-by-country reporting
Explore Trade & Manufacturing

Athletes, Artists & Entertainers

Performance income is taxed where earned — Regulation 105 in Canada, withholding agreements in the U.S. — with special treaty articles overriding the usual rules.

Performance income is taxed where the performance happens, and the deduction is usually taken at source on the gross fee before expenses. Recovering the difference is a filing exercise in the other country, and it only works if the tour, the residency and the withholding certificates were documented while the work was being done.

  • Reg 105 & U.S. CWA agreements
  • Multi-state & country calendars
  • Touring income allocation
  • Royalty & image-rights withholding
Explore Athletes & Entertainers

Remote Workers & Digital Nomads

  • Residency analysis before moving
  • Employer payroll exposure
  • Totalization & social security
  • Foreign tax credits
Explore Remote Workers

Investment Funds & Holding Companies

  • Treaty access & PPT reviews
  • FAPI & surplus computations
  • Withholding-efficient routing
  • Governance & substance
Explore Funds & Holdcos

Our practitioners are alumni of leading accounting and tax institutions

Where our partners studied — CPA Canada (In-Depth Tax Program), AICPA, the Institute of Chartered Accountants of India and the Malaysian Institute of Accountants.

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