How is a professional services firms business taxed across borders?

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Answer

Partnership income is allocated by rules that ignore where a partner happens to live, so an internationally mobile partner group creates allocation and credit questions the firm has to solve centrally. The first foreign obligation in this sector is rarely income tax, which is why it is discovered late.

The rule for this sector

Partnership income is allocated by rules that ignore where a partner happens to live, so an internationally mobile partner group creates allocation and credit questions the firm has to solve centrally.

Two of the firm’s advisers and the team in the open-plan office

When it does not bind you

Our partners live in three countries and the allocation is done in one.

How is a professional services firms business taxed across borders?
ItemAmount
Annual salaryC$181,000
Working days in the year243
Days worked in the other country76
Days worked at home167
Income sourced to the other countryC$56,609
Income sourced at homeC$124,391

C$56,609 is sourced abroad on this split, which is the figure the host country taxes and the figure the home credit is computed on. Reproduce this from a travel record, not from memory — it is the first thing an auditor asks for.

Treat these numbers as a worked example rather than advice — they exist to make the mechanics visible, and the rates and thresholds are assumed for the illustration. For a real filing, we verify each figure with the authority that publishes it, for your year.

Where to go from here

The full treatment — who it binds, the deadline, the penalty and the fixed fee — is on Cross-border tax for professional services firms. Send us the facts and we will tell you what has to be filed and what it costs.

Reviewed for the 2025 and 2026 filing seasons by Udit Gupta, Cross-Border Tax Expert, Legal Quotient Consultants. General information, not advice for your circumstances — call our 24-hour helpline to discuss your own position.

Expat tax professionals, in practice

This is the page to read on expat tax professionals. It takes professional services firms in order — the test that decides who is affected, the returns and forms that follow from it, and a fee quoted in writing before anything starts.

Cross-border tax case studies

Case study 1

Allocation rebuilt so partners in three countries filed consistently

The firm allocated profit in one country under its partnership agreement while partners resident in two others filed on whatever figures reached them, in different formats and at different times. We reconciled the allocation to each partner's own filing position, identified where source and character had been reported inconsistently between the three, and set out which country held the primary taxing right over each stream of income. The engagement produced a single allocation statement issued to every partner in a form each of their advisers can use, corrected filings where the positions had diverged, and a timetable that gets the statement out before the earliest of the three deadlines.

Read how this one runs
Case study 2

Secondment relief tested before a cost recharge would have removed it

The firm was about to second a senior manager to an office abroad and had assumed the short-assignment relief in the treaty would apply. It also intended to recharge the cost to the host office, which would have meant the remuneration was borne by an entity in the host country and the relief lost. We set out the conditions the relief depends on, tested the proposal against each of them, and modelled the alternative of registering for host payroll from the start. The work produced a revised recharge arrangement, a written record of the position taken, and a checklist the firm now runs before any secondment is confirmed.

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Case study 3

Foreign tax on firm income traced through to partner returns

Tax had been deducted abroad on income the firm earned through an overseas engagement, and the partners had no evidence of what had been borne on their own shares. Without that evidence no credit could be claimed at home. We traced the deduction back to the underlying income, apportioned it across the profit-sharing ratios in force for the period, and prepared the schedules each partner's return required. The engagement produced per-partner statements of foreign tax borne, credit claims filed on a consistent basis across the three countries, and a process for issuing the same schedules each year without another reconstruction.

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Case study 4

Engagement history reviewed for presences the firm had never registered

Partners had worked on client matters abroad for years and nobody had asked whether any of it amounted to a presence. We took the engagement records for the open years, listed every country in which work had physically been performed, and tested the duration and continuity of that work against each country's rules. Most fell well short of a presence. Two did not. The engagement produced a documented assessment for every country on the list, registrations and outstanding filings in the two countries concerned, and a rule the firm now applies whenever an engagement requires sustained work in another country.

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Case study 5

Classification of the firm settled before any foreign return was filed

Before filing anywhere, the firm needed to know whether the country concerned treated it as transparent or as a taxable entity in its own right, because the two answers lead to different returns signed by different people. We established the classification that country applies to a partnership of this form, checked it against the treatment in each partner's country of residence, and identified the mismatch that would otherwise have produced tax in both with relief in neither. The result was a written classification analysis, returns filed by the correct person in each country, and a note of the position for the firm's own file.

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Case study 6

Partner admitted from a new country and the allocation reworked

The firm admitted a partner resident in a country it had never dealt with, part-way through its financial year. The allocation, the change in profit shares and the partner's own filing obligations all had to be settled at once, and the partner's country taxed on a different year end. We computed the share attributable to the part-year, established how each country would source and time it, and set out what the firm had to provide and by when. The engagement produced the part-year allocation statement, the new partner's first filings in both countries, and an admissions note the firm now follows whenever a partner joins from outside its existing jurisdictions.

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Case study 7

Fifteen Per Cent Held Back From a Fee for Services in Canada

A payer must withhold from fees paid to a non-resident for services rendered in Canada, whether or not any tax is ultimately owed. A waiver applied for before the work is invoiced avoids the withholding; after it, the money comes back through a return.

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Case study 8

A Family Trust Abroad With Reporting on Both Sides

A trust settled in one country and a beneficiary living in another produces reporting for the trust, the settlor and the beneficiary, on different forms and different dates. The engagement maps who files what before anything is prepared.

Read how this one runs

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

Cross-border tax for sellers shipping worldwide: marketplace withholding, foreign registrations and inventory nexus handled before they become audits.

Marketplaces withhold, remit and report in their own right, so the tax position of a single sale is decided by where the stock sat, where the buyer was and which platform collected — not by where the company is registered. We reconcile the platform's own filings against the returns before either is submitted.

  • Foreign VAT / GST / sales tax registrations
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  • Inventory nexus & PE analysis
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Technology & SaaS

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  • IP structuring with real substance
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  • U.S. expansion: entity & PE setup
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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

  • 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

The follow-up questions on Professional services firms

Our partners live in three countries — how is the profit allocated?

The allocation is made by the partnership agreement and by the tax rules of the country the partnership was formed in, and those rules pay no attention to where an individual partner happens to live. That is the source of the difficulty. The partnership computes and allocates a share to each partner; each partner's own country then applies its own rules to that share, and may characterise it differently, source it differently, or tax it in a different year. A firm with partners in three countries is answering three sets of questions about one number, and it has to do so centrally, because only the firm holds the allocation. Partners filing in isolation is how inconsistent positions arise.

Why is a partner taxed in a country they do not live in?

Because partnership income usually keeps its source. In most systems a partnership is transparent: the profit is not taxed at the level of the firm, it is allocated to the partners and taxed in their hands, and it carries with it the character and the source it had when the firm earned it. So a share of profit earned through an office or an engagement in another country can be taxable in that country in the partner's own name, whether or not that partner has ever set foot in it. The partner's country of residence then taxes the same share and gives credit for the foreign tax. Getting the source right at firm level is what makes the credit work at partner level.

Do secondments between our offices create a payroll obligation abroad?

Frequently. A secondment moves a person's place of work, and employment tax in most countries follows where the work is performed rather than where the payroll sits. Short assignments are often relieved by treaty, but the relief is conditional — typically on the length of the stay, on the remuneration not being borne by an entity in the host country, and on the employer having no taxable presence there. A firm that recharges the secondee's cost to the host office usually breaks the second condition without noticing, because the recharge is an accounting entry made months after the person arrived. The time to test a secondment is before it starts, not in the following filing season.

Can a partner claim credit for tax the firm paid abroad?

Usually yes, but the mechanics depend on whether the tax was borne by the firm or by the partner. Where the partnership is transparent, foreign tax paid on partnership income is normally treated as paid by the partners in their profit-sharing ratio and claimed in their own returns. Two things commonly break it. The first is timing: the foreign tax and the home taxation of the same profit can fall in different years, and a credit generally has to be claimed in the year the income is taxed at home. The second is evidence, because the partner needs proof of tax paid on their own share and only the firm can produce it. Both are firm-level problems with partner-level consequences.

Has client work performed abroad created a presence we never registered?

It is worth assuming so until you have checked. A presence can arise from an office, but it can equally arise from people: partners or staff working on a client's matter in another country over a sustained period, or someone there who habitually concludes engagements for the firm. Because the work is billed centrally and the partners are taxed personally, nothing in the firm's own accounts flags it. The way to find out is to take the open years of engagements, list the countries in which work was physically performed, and test each against the presence rules of that country. Where a presence did arise, the firm and the partners generally both have filings to make.

Should the firm or the partner file in the foreign country?

Often both, and they are not alternatives. Where the partnership is transparent, the foreign country may require an information filing from the firm and a return from each partner with a share of income sourced there. Where it treats the firm as opaque, or the firm operates through a local entity, that entity files and the partner may have nothing to do. The first thing to establish is how the foreign country characterises your firm, because two countries can classify the same partnership differently and that mismatch produces double taxation no credit relieves. Answer the classification question before any return is drafted.

How much foreign income is tax-free in the United States?

Nothing is exempt in the USA merely for arising abroad — a US person is taxed on worldwide income. What exists is an election: the foreign earned income exclusion removes foreign *earned* income up to an annual cap if you meet one of two qualifying tests, $132,900 for 2026 and $130,000 for 2025, with a separate housing amount alongside it. It does not touch investment income, pensions or gains, and it is claimed on a form rather than assumed. See the foreign earned income exclusion.

Is the sale of foreign property taxable where I live?

For a resident, yes — worldwide gains are taxable, and the gain is computed in your own currency, so the exchange rate at purchase and at sale changes the number even when the local-currency price did not move. The country where the property sits usually taxes it too, often with a withholding or clearance step before closing, and that tax becomes a credit. A principal residence relief may apply to a home abroad on the same terms as one at home. See principal residence and foreign property.

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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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