18 pages. Assignments, secondments, equity and the day counts everything depends on. Each one opens with the part that applies to that situation and nowhere else — a threshold, a treaty article, a filing that one group owes and the group beside it does not — and works one example through in full.
Cross-border payroll and global mobility
Assignments, secondments, equity and the day counts everything depends on.
- 15+Years of the founder's cross-border experience
- 18,000+Clients served across our offices in India, the USA, Canada and the UAE
- 5.0Google rating
- 4Global offices — India, USA, Canada & UAE
Secure a fixed quote
Begin with the papers you already have. The engagement is priced from them, in writing, before the work.
24-hour helpline: +1 (416) 619-006818 pages in this section. Assignments, secondments, equity and the day counts everything depends on.
← All cross-border and international tax services
Every page in this section is written to the same standard: it opens with the block that exists nowhere else on the site — a threshold, a treaty article, a rule that applies to one group and not the one beside it — and it carries one worked example, worked through in full rather than a set of generalities.
Where a page needs a statutory threshold, a rate or a day-count, that figure is verified against the issuing authority before it ships. Where it cannot be verified for the year in question, the page states the mechanism and quotes no number, because a wrong threshold on a page like this is worse than no page at all. Every statutory page also carries the name of the person who reviewed it and the date they did.
Fees are fixed and agreed in writing before any work begins, and you review the finished work before it is filed. Documents move through a secure portal and you can meet us at any of our offices, so where you are makes no difference to how it works.
Payroll & mobility 18
- Payroll for a foreign employee in Canada
- Payroll for a Canadian employee abroad
- US payroll for a Canadian company
- State payroll & nexus for remote staff
- Shadow payroll
- Tax equalisation & protection policies
- Assignment letters & secondments
- Short-term business visitors
- 183-day rules in practice
- Social security & totalization certificates
- CPP/EI vs FICA for cross-border staff
- Stock options across borders
- RSUs across borders
- Employee vs contractor — both countries
- Personal services business risk
- Relocation benefits & taxability
- Remote work policy — tax exposure
- Global mobility calendar & day tracking
- Your existing accountant keeps the domestic file; we take the cross-border piece, with the boundary in writing.
- Nothing is filed until you have read it.
- A change of scope is re-quoted before the work, never added to the invoice after it.
Reviewed against current guidance for the 2025 and 2026 filing seasons by Udit Gupta, International Tax, Cross-Border Tax & Transfer Pricing Expert, Legal Quotient Consultants. Published as general information. For a position on your own file, call the 24-hour helpline.
Questions readers ask before they pick a page
The fee is fixed and agreed in writing before any work begins, priced from the documents you send rather than estimated afterwards, and it does not move once accepted. You see the finished work and approve it before anything is filed.
A named adviser reviews every return and every information filing before it goes out, and the statutory pages on this site carry the name of the person who reviewed them and the date they did it. You approve the finished work yourself as the last step.
Send what you have — a return, a notice, a set of statements, in whatever state it is in — through the secure portal after the first call, and you get a written fixed fee back. Or call the 24-hour helpline on +1 (416) 619-0068 and we will tell you what is needed.
Because most cross-border employment questions — which country withholds, whether a treaty exemption applies, whether a permanent establishment is created — turn on how many days the employee actually spent in each country, so tracking that figure accurately is the foundation the rest of the analysis sits on.
A single short trip usually does not, but a pattern of short trips can accumulate into the same exposure a longer assignment would create, which is why this section treats frequent travellers and formal secondments as related rather than separate questions.
What working with us on cross-border payroll and global mobility looks like
18,000+ clients served
Individuals, expats and corporations across India, the USA, Canada and the UAE have filed with us — 15+ years of cross-border work.
Every figure on a page is traceable
Where a rate or a threshold appears in our writing it names the tax year it belongs to. Where it could not be confirmed, the page describes the mechanism and quotes no number.
The reporting penalties get named early
The heaviest exposure on a cross-border file is usually a disclosure form, not the tax. We identify which ones apply before a deadline turns into a penalty.
Residence is tested, not assumed
Where you are resident for treaty purposes is a question with a method. We work through it and write down the answer, with the facts it rests on.


From first document to filed return
- Step 1: Send the documents as they are – No tidying required — forward what you have and we tell you what is missing.
- Step 2: Get a fixed quote in writing – Priced from your actual documents before any work begins, not estimated after.
- Step 3: Both countries prepared together – One team builds the filings against each other so the relief lands exactly once.
- Step 4: Review, then file – You approve the finished work before we file it.
Quoted up front, in writing.
Contact Us 24-hour helpline +1 (416) 619-0068Recommended by clients on both sides of the border
We keep the promises short so they stay checkable: a fixed fee in writing before work begins, 18,000+ clients served over 15+ years, and a 5.0/5 Google rating — with the case files published so you can read how engagements actually ended.
- 18,000+ files and counting, handled over 15+ years by a team working from India, the USA, Canada and the UAE.
- Offices in India, the USA, Canada and the UAE and a secure portal for the paperwork — nothing has to be posted or dropped off.
- The first call costs nothing: the helpline is open 24 hours, and occasionally its conclusion is that no engagement is needed.
We list coverage only where the article can be linked. What we say publicly, and where · Credentials and memberships · Read the reviews
Keep reading, sideways
Browse sideways: the pages below answer the neighbouring questions.
Core services for this situation
Clients who arrive with this exact page
The corridors we work every week
Cross-border situations we are engaged for
Group's global mobility program reviewed across every assignment type it runs
A group running secondments, short visits and permanent transfers all at once needed its entire mobility program reviewed together, since each assignment type carries its own day count and its own set of obligations. We reviewed every assignment category the group ran and set out the obligations specific to each one.
Employer's equity compensation coordinated with its cross-border payroll for the first time
An employer granting equity to employees who moved between countries needed that compensation coordinated with its payroll for the first time, since equity vesting across a move creates its own sourcing question separate from salary. We reviewed the equity grants against the affected employees' moves and coordinated the resulting payroll treatment.
Company's mobility program restructured after a rapid increase in cross-border hiring
A company whose cross-border hiring increased rapidly needed its mobility program restructured, since the informal approach that worked for a handful of assignees no longer scaled to the larger number involved. We reviewed the expanded program and restructured it around a consistent, repeatable process.
An Assignment Priced Without Counting the Days
Nearly every relief in a mobility file — treaty exemption, residence, social security — is decided by a day count that has to be evidenced. The engagement puts the tracking in place at the start, because it cannot be reconstructed at the end.
Read how this one runsWhich Country Taxes the Salary
The employment article turns on where the work is done, who pays, and who bears the cost — three tests that can point in different directions. The file establishes all three before either return is drafted.
Read how this one runsPutting a Foreign Hire on a Canadian Payroll
The obligation sits on the payer, and the payer is liable for what it failed to withhold. Registration, the residence question and any treaty exemption are settled before the first pay run rather than after.
Read how this one runsSocial Security Paid Twice Until a Certificate Arrived
Income tax relief does not reach a social security charge; only an agreement does, and only against a certificate from the system actually being paid into. Obtaining it is the work, and it is often retrospective.
Read how this one runsOptions Granted in India and Exercised Elsewhere
Where the grant, the vesting and the exercise happen in different countries, each may claim part of the same gain. Apportioning it across the period worked is what prevents the whole amount being taxed twice.
Read how this one runsAll case studies — every published engagement in one place.
Core International & Cross-Border Tax Services
Strategy and compliance for income, assets and families spread across borders.
Industries & Client Types We Serve Worldwide
- Foreign VAT / GST / sales tax registrations
- Marketplace withholding reviews
- Inventory nexus & PE analysis
- Multi-currency books reconciled
- Cross-border revenue sourcing & withholding
- IP structuring with real substance
- Equity for cross-border teams
- U.S. expansion: entity & PE setup
Firms and partners working across borders meet Regulation 105 withholding, PE risk on long engagements and per-country payroll for travelling staff.
A partnership is taxed in the hands of its partners, so one engagement abroad can reach every partner's personal return. The order matters: the waiver is applied for before the invoice, the presence is tracked before it becomes an establishment, and the payroll is registered before the first day worked in the other country.
- Reg 105 / 102 waivers
- Permanent establishment risk
- Partner mobility planning
- Cross-border withholding recovery
- Section 216 rental returns
- FIRPTA withholding recovery
- Section 116 clearance
- Treaty credit optimization
- Transfer pricing documentation (s.247)
- Customs value vs transfer price
- Foreign affiliate reporting (T1134)
- Country-by-country reporting
- Reg 105 & U.S. CWA agreements
- Multi-state & country calendars
- Touring income allocation
- Royalty & image-rights withholding
- Residency analysis before moving
- Employer payroll exposure
- Totalization & social security
- Foreign tax credits
- Treaty access & PPT reviews
- FAPI & surplus computations
- Withholding-efficient routing
- Governance & substance



