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§00Dossiers

90 dossiers.
One coherent canon.

Each dossier takes one cross-border exposure and works it end to end: the statute that creates it, the operational facts that trigger it, and what the position depends on. Read sequentially or by category.

Dossiers

№1336m
Filings & Penalties

The Year-End Checklist for Non-U.S. Residents: 12 Things to Settle Before 31 December

Twelve items that are cheap to fix before the year closes and expensive afterwards: the day count, expiring treaty forms, undocumented intercompany charges, and the four deadlines that land between January and April.

Open Dossier
№1345m
U.S. Tax Residency

Christmas in Florida: How Holiday Visits Add Up on the Day Count

A three-week visit is 21 days, and days in the current year count at full weight. How a holiday trip turns into U.S. tax residency on worldwide income, and which two exceptions are still open once it has.

Open Dossier
№1354m
ECI & Exposure

Peak Season: What Black Friday to Christmas Does to a Non-Resident Seller's U.S. Tax Position

Fourth-quarter stock in U.S. fulfilment centres, seasonal contractors, and a returns wave that runs into February. The facts that decide whether a foreign seller is taxed in the United States are at their highest in Q4.

Open Dossier
№1365m
Filings & Penalties

Year-End for a Foreign-Owned U.S. Company: Four Things to Settle Before 31 December

Expiring W-8 forms, related-party charges that need a written basis, the transactions that belong on the annual information return, and the timing decisions that stop being available once the year closes.

Open Dossier
№1374m
U.S. Property

Holiday Gifts and U.S. Gift Tax for Non-Residents

For a non-domiciled giver, U.S. gift tax turns on what is given rather than who gives it: U.S. real estate and tangible property here are within reach, most financial assets are not, and the estate tax rules run the other way.

Open Dossier
№1269m
Treaty Optimization

Royalty, Service Fee, or Sale?

The same payment can be a royalty, a fee for services, or the price of a sale, and each is sourced and withheld differently. The contract's label is not what decides it.

Open Dossier
№1258m
Treaty Optimization

The Payer Is On the Hook

U.S. withholding runs through the person making the payment, who becomes personally liable for tax they failed to withhold. What that means whether you are receiving the payment or making it.

Open Dossier
№12410m
Treaty Optimization

Why a Treaty Can Exist and Still Not Apply to You

Modern U.S. treaties contain a gatekeeping article designed to stop residents of third countries from borrowing benefits. Passing it is a structural question about who owns you and where.

Open Dossier
№1239m
ECI & Exposure

What Gets Withheld When You Sell

A buyer purchasing U.S. real property from a foreign seller is required to withhold from the purchase price, not from the gain. The reduction procedures exist but they have to be started before closing.

Open Dossier
№1229m
ECI & Exposure

Rental Income From U.S. Property

By default, rent paid to a non-resident owner is taxed on the gross amount with nothing deducted. An election changes that to net taxation, and it has to be made deliberately.

Open Dossier
№12110m
ECI & Exposure

Where the Sale Happens

For a seller of goods, the place where title passes has historically driven where the income is sourced. What that means for a dropshipper who never touches the product.

Open Dossier
№1209m
ECI & Exposure

Sales Tax Is Not Income Tax

Sales tax is collected from your customer and owed to the state whether or not you have any U.S. income tax exposure. Economic nexus, marketplace facilitator rules, and the registrations that follow.

Open Dossier
№1198m
ECI & Exposure

Does a Server Create a Presence?

Equipment you own and control is analysed differently from capacity you rent. Why the distinction matters, and why the answer for a cloud subscription is usually not the answer for a rack you own.

Open Dossier
№1189m
ECI & Exposure

Hiring in the United States

One person working for you inside the United States can change your filing position, and whether they are an employee or a contractor changes it in different ways.

Open Dossier
№329m
Filings & Penalties

Late Form 5472: Reasonable Cause and What Relief Actually Requires

The $25,000 penalty is not a tax penalty, it does not scale with income, and filing late with a reasonable cause statement does not guarantee it will not be assessed.

Open Dossier
№339m
Filings & Penalties

Delinquent International Return Procedures: Choosing the Right Route

More than one route exists for coming back into compliance, built for different taxpayers. Filing under the wrong one is one of the more expensive mistakes available in this area.

Open Dossier
№349m
Filings & Penalties

BEA Surveys: The Mandatory Filing That Has Nothing to Do With the IRS

A foreign-owned U.S. business can owe a federal survey to the Bureau of Economic Analysis at a 10% ownership threshold, triggered by the transaction itself rather than by being asked.

Open Dossier
№359m
Filings & Penalties

ITIN Renewal: Why Numbers Expire and How Rejections Happen

An ITIN can expire from disuse, and filing a return with an expired number can mean credits and treaty benefits are quietly disallowed, discovered only when the refund does not arrive.

Open Dossier
№369m
Filings & Penalties

What a Certifying Acceptance Agent Actually Does

The one authorisation that lets an ITIN applicant keep their passport rather than mailing it to the United States, and the easy-to-miss difference between this and an ordinary acceptance agent.

Open Dossier
№378m
U.S. Property

Form 8288-B: Reducing FIRPTA Withholding Before Closing

An application that can reduce the standard 15% withholding before the sale closes, and it must be filed by the closing date, which means the decision to apply has to be made early.

Open Dossier
№389m
U.S. Property

The Net Election on U.S. Rental Income for Foreign Owners

By default, rental income to a non-resident is taxed at 30% of the gross rent, with no deduction for costs. An election available to every foreign landlord changes that to tax on the net profit.

Open Dossier
№398m
U.S. Property

Selling U.S. Rental Property: Depreciation Recapture Explained

Depreciation recapture applies to what you were entitled to deduct, whether or not you actually claimed it, the least forgiving rule for an owner who never realised they should have been filing.

Open Dossier
№409m
U.S. Property

How Foreign Buyers Should Structure U.S. Real Estate Purchases

Personally, through a U.S. company, through a foreign company, or through a trust, four structures that trade off income tax, exit tax and estate tax exposure differently, and the choice is expensive to reverse.

Open Dossier
№419m
Country Guides

U.S. Tax for UAE Residents: Why No Treaty Changes Everything

The UAE has no U.S. income tax treaty, which removes the treaty tie-breaker and the reduced withholding rate that residents of treaty countries rely on for the same facts.

Open Dossier
№429m
Country Guides

U.S. Tax for Brazilian Residents With U.S. Business Interests

Brazil has no comprehensive U.S. tax treaty, which removes the treaty tie-breaker and the reduced withholding rate available to founders resident in treaty countries.

Open Dossier
№439m
Country Guides

U.S. Tax for Nigerian and African Founders Using U.S. Entities

Why U.S. entities are increasingly used across the region for payment infrastructure alone, and why that entity still owes its own federal filings independent of where the real business operates.

Open Dossier
№449m
ECI & Exposure

ECI vs. FDAP: The Classification That Decides Everything

Two categories of U.S.-source income taxed in completely different ways, 30% of the gross amount, or graduated tax on the net. Getting the classification wrong is the single most consequential error in inbound tax.

Open Dossier
№459m
ECI & Exposure

Independent Contractor or Dependent Agent? The U.S. Presence Test

One U.S.-based contractor, engaged the wrong way, can single-handedly create a taxable U.S. presence for a foreign business that otherwise has no U.S. footprint at all.

Open Dossier
№469m
ECI & Exposure

Transfer Pricing for Small Foreign-Owned U.S. Subsidiaries

The arm's-length rule applies from the first intercompany dollar, and a pattern of U.S. subsidiary losses alongside a profitable foreign parent is a documented IRS enforcement target.

Open Dossier
№479m
Filings & Penalties

The Stripe Atlas, Firstbase and doola Compliance Gap

These platforms are genuinely good at incorporation. None of them file the annual federal return a foreign-owned entity owes, and paid 'compliance' tiers often cover only the state filing, not the federal one.

Open Dossier
№488m
ECI & Exposure

What a 1099-K Actually Means for a Foreign-Owned Entity

Gross payment volume on a 1099-K is not a tax bill and does not by itself create U.S. tax, but it is exactly the kind of IRS data trail that surfaces an entity with no filing history.

Open Dossier
№498m
ECI & Exposure

Digital Services Tax and VAT: What a U.S. Founder Actually Owes Abroad

Headline digital services taxes target large platforms and rarely reach a small U.S. company. Foreign VAT and GST registration on direct digital sales is the much more common and much lower-threshold obligation.

Open Dossier
№507m
U.S. Tax Residency

The Closer Connection Exception and Form 8840

A route to stay a non-resident despite meeting the day count, available only under 183 actual days this year, and closed outright by a pending green card application.

Open Dossier
№5111m
Filings & Penalties

State Income Tax Nexus for Foreign Sellers

A federal treaty position and full IRS compliance say nothing about what an individual U.S. state can assert. Physical and economic nexus rules now reach many sellers who assume they are protected.

Open Dossier
№529m
Incorporation Architecture

Choosing a State Beyond Wyoming and Delaware

Formation state and operating state are separate questions, and most foreign founders end up registered in more than one. What matters is the structure of each state's recurring charge, not the advertised filing fee.

Open Dossier
№1277m
Treaty Optimization

Claiming a Treaty Position on the Return

A treaty benefit that is not claimed is generally not given. The disclosure that has to accompany the position, the exceptions that waive it, and the penalty for staying silent.

Open Dossier
№1289m
Treaty Optimization

The India Treaty for Inbound Business

For Indian residents with U.S. income, the treaty modifies withholding, defines when a presence becomes taxable, and contains a technical services article that most U.S. treaties do not.

Open Dossier
№1299m
Treaty Optimization

The United Kingdom Treaty for Inbound Business

The U.S. and United Kingdom treaty is among the most developed in the network, with a detailed benefits-limitation article and a zero-rate dividend provision that has strict conditions attached.

Open Dossier
№13010m
Treaty Optimization

The Canada Treaty for Inbound Business

Proximity makes the Canadian treaty the one most often relied on by accident. The services permanent establishment rule and the treatment of hybrid entities are where Canadian owners get caught.

Open Dossier
№1319m
Treaty Optimization

The Mexico Treaty and the USMCA Overlay

The tax treaty and the trade agreement do different jobs and are constantly confused. One governs income tax, the other governs goods, tariffs and market access, and neither substitutes for the other.

Open Dossier
№1328m
Treaty Optimization

The Japan Treaty for Inbound Business

The Japan treaty carries some of the most favourable withholding provisions in the U.S. network, paired with a correspondingly demanding benefits-limitation article.

Open Dossier
№1179m
ECI & Exposure

Inventory in a U.S. Warehouse

Goods sitting in a fulfilment centre are the fact pattern that most often turns a foreign seller into a U.S. filer. What inventory establishes under domestic law, and what a treaty may still take back.

Open Dossier
№1167m
ECI & Exposure

Two Different Tests, Two Different Answers

Domestic law asks whether you have a U.S. trade or business. A treaty asks whether you have a permanent establishment. Both can be answered, and the answers are not required to agree.

Open Dossier
№1159m
Incorporation Architecture

Beneficial Ownership Reporting After the Rule Changed

The federal beneficial ownership regime narrowed sharply in 2025 and now reaches foreign-formed companies registered to do business in a U.S. state. What that leaves in scope, and why the position needs rechecking.

Open Dossier
№1149m
Incorporation Architecture

The Formalities That Keep the Shield Standing

Limited liability is a default that can be lost. The record-keeping, capitalisation and separation practices that distinguish a respected entity from one a court looks straight through.

Open Dossier
№1138m
Incorporation Architecture

Holding Companies, Subsidiaries and Series LLCs

Separating assets into layers is easy to draw and easy to get wrong. What a holding structure actually separates, where the series LLC is and is not recognised, and the filing multiplication nobody budgets for.

Open Dossier
№11210m
Incorporation Architecture

Closing a U.S. Entity Without Leaving a Tail

Abandoning an entity does not end it. Filing obligations, state franchise charges and penalty exposure continue against a company nobody is administering, and they follow the owner.

Open Dossier
№1119m
Incorporation Architecture

Getting an EIN With No Social Security Number

The online application is closed to applicants without a U.S. taxpayer identification number, which is most foreign owners. The routes that remain, what the responsible party field means, and why third-party filings go wrong.

Open Dossier
№1109m
Incorporation Architecture

Why the Bank Says No

The entity is formed, the EIN is issued, and the account application still fails. What U.S. financial institutions are required to collect, why a foreign-owned single-member LLC is the hardest case, and what makes a file approvable.

Open Dossier
№1099m
Incorporation Architecture

What a U.S. Address Actually Creates

A registered agent is a service-of-process requirement, not a place of business. Where the two get confused, foreign owners create exposure they never intended and lose mail that starts a clock.

Open Dossier
№1089m
U.S. Tax Residency

Days You Could Not Leave

Some days spent in the United States never enter the residency count: a medical condition that arose while present, transit, commuting from Canada or Mexico, and crew days. Each has its own conditions.

Open Dossier
№10710m
U.S. Tax Residency

Leaving the U.S. Tax System

Giving up citizenship or long-term permanent residence can trigger a mark-to-market charge on unrealised gain. The three tests that make someone covered, and the filing that has to happen either way.

Open Dossier
№1069m
U.S. Tax Residency

What a Non-Resident Actually Files

Non-residents file on a different form, under different rules, with income split into two baskets taxed two different ways. What goes where, and the deductions that are simply unavailable.

Open Dossier
№1059m
U.S. Tax Residency

Getting an ITIN Without a Social Security Number

An ITIN is issued to people with a U.S. filing requirement who cannot get a Social Security number. What has to accompany the application, why passports go missing in the mail, and how ITINs expire.

Open Dossier
№1046m
U.S. Tax Residency

The Green Card Test and What Ends It

Lawful permanent residence makes you a U.S. tax resident regardless of where you live or how few days you spend in the country, and it continues until it is formally ended, not until you stop using it.

Open Dossier
№1039m
U.S. Tax Residency

Exempt Individuals: Days That Do Not Count

Students, teachers, trainees and certain foreign government personnel exclude days from the residency count entirely, but only for a limited number of years and only if the exclusion is reported.

Open Dossier
№10210m
U.S. Tax Residency

Dual-Status Years and the First-Year Choice

The year you arrive is rarely all resident or all non-resident. How a dual-status year is filed, what the first-year choice buys and costs, and the deductions a dual-status filer gives up.

Open Dossier
№10110m
U.S. Tax Residency

When Two Countries Both Call You Resident

Dual residence is common and the treaties anticipate it. The tie-breaker ladder runs through permanent home, centre of vital interests, habitual abode and nationality, in that order, and stops at the first rung that resolves.

Open Dossier
№1007m
U.S. Tax Residency

The Substantial Presence Test, Day by Day

The 183-day formula counts three years, not one, and it weights them differently. How the count works, which days are excluded before you start, and what changes the moment the test is met.

Open Dossier
№318m
Incorporation Architecture

Check-the-Box: Election Mechanics, Deemed Transactions, and the 60-Month Lock

Form 8832 changes what an entity is for U.S. tax purposes. The election is simple to file and difficult to unwind: it triggers a deemed liquidation or incorporation, allows only 75 days of backdating, and locks you out of changing again for five years.

Open Dossier
№309m
Treaty Optimization

Sovereign Capital Management Strategy

Protecting cross-border earnings while scaling global operations. The four-tier capital sovereignty model and the threshold at which it pays for itself.

Open Dossier
№298m
Treaty Optimization

The Merchant Account Compliance Guide

Managing international tax requirements for global Stripe and Adyen setups. KYC implications, beneficial ownership disclosures, and the 1099-K cascade for foreign entities.

Open Dossier
№288m
Treaty Optimization

Navigating Branch Profits Tax Architecture

Managing earnings distributions from U.S. entities to global parent companies. The branch profits tax mechanics, treaty reductions, and the dividend equivalent amount calculation.

Open Dossier
№278m
Treaty Optimization

The FBAR and FATCA Blueprint

Essential asset disclosure tracking for international founders and citizens. FinCEN 114 mechanics, Form 8938 thresholds, and the $10,000 penalty cliff.

Open Dossier
№268m
Treaty Optimization

Intellectual Property Location Strategy

Choosing where to place your brand assets to optimize your international tax position. Royalty withholding under treaty, GILTI implications, and the BEAT cliff.

Open Dossier
№258m
Treaty Optimization

The Portfolio Interest Exception

Structuring international debt and intercompany financing efficiently. The portfolio interest exception, the 10% ownership rule, and the documentation that survives review.

Open Dossier
№248m
Treaty Optimization

Managing Form 1120-F Requirements

A master class in corporate filings for international enterprises. Protective return strategy, branch profits tax, and the schedule M-1/M-3 reconciliation.

Open Dossier
№238m
Treaty Optimization

Transfer Pricing Essentials

Designing arm's-length agreements between foreign parents and U.S. entities. Cost-plus, profit-split, CUP — the three methods and when each is defensible.

Open Dossier
№228m
Treaty Optimization

The Cross-Border W-8BEN-E Protocol

Correctly completing documentation to avoid automatic platform withholdings. The Part III treaty claim, FATCA classification, and the 11 fields most foreign entities get wrong.

Open Dossier
№218m
Treaty Optimization

How a U.S. Income Tax Treaty Actually Works

How a U.S. income tax treaty overrides statutory withholding, and where it does not reach. Residency, the limitation on benefits article, and the jurisdictions with no treaty at all.

Open Dossier
№209m
ECI & Exposure

Physical Property vs. Digital Infrastructure

Defining asset presence rules for modern global enterprises. Servers, edge nodes, leased warehouse space — what the IRS treats as fixed place of business.

Open Dossier
№197m
ECI & Exposure

The Digital Service Framework

Tax optimization strategies for international development and marketing teams. Engineering team in Lahore, sales team in London, customers in the U.S. — where does it tax?

Open Dossier
№187m
ECI & Exposure

Cross-Border Affiliate Networks

How affiliate commissions are characterized and sourced, in both directions. W-8 collection as a payer obligation, 1042-S reporting, and when withholding applies at all.

Open Dossier
№177m
ECI & Exposure

The Remote Enterprise Assessment

Evaluating physical presence rules for international digital service agencies. When a single U.S. contractor changes everything.

Open Dossier
№167m
ECI & Exposure

Isolating Pass-Through Profits

Managing passive investments vs. active business income for non-residents. Portfolio interest exception, FDAP treatment, and the case for a separate investment vehicle.

Open Dossier
№159m
ECI & Exposure

The Independent Agent Risk

How remote contractors can accidentally expand your U.S. tax exposure. The independent-versus-dependent agent distinction, and the treaty article that decides it.

Open Dossier
№148m
ECI & Exposure

The E-Commerce Tax Trap

Navigating source withholding rules for cross-border digital platforms. Stripe, Shopify, Amazon, Etsy — the 1099-K cascade and how to keep your foreign source position intact.

Open Dossier
№138m
ECI & Exposure

SaaS Platforms and Borderless Sales

Managing tax exposure for global cloud architectures. Hosted server location, customer concentration, dependent contractor risk — the four dimensions that flip SaaS into ECI.

Open Dossier
№129m
ECI & Exposure

The 3PL and Remote Fulfillment Pivot

Does using U.S. warehousing create a domestic permanent establishment? Amazon FBA, ShipBob, Deliverr — the de minimis activity carve-outs and the IRS positions that override them.

Open Dossier
№119m
ECI & Exposure

Decoding Effectively Connected Income (ECI)

How to determine if your global sales trigger U.S. corporate taxation. The U.S.-trade-or-business framework, dependent-agent rules, and the practical test the IRS actually applies.

Open Dossier
№109m
Incorporation Architecture

The Capital Relocation Framework

Structuring global funding rounds for cross-border startups. SAFE notes from foreign investors, qualified small business stock eligibility, and §83(b) for non-resident founders.

Open Dossier
№098m
Incorporation Architecture

Delaware Corporate Maintenance Rules

Managing international operations without a physical domestic presence. Registered agent obligations, franchise tax computation, and annual report mechanics.

Open Dossier
№088m
Incorporation Architecture

Wyoming's Privacy Protections

Strategic asset management for high-net-worth international investors. What the Wyoming filing record does and does not contain, and where state-level privacy stops.

Open Dossier
№079m
Incorporation Architecture

The Foreign Parent Entity Guide

A foreign parent owning a U.S. subsidiary: capitalization versus debt, pricing on intercompany services set at market rates, dividend withholding, and the Form 5472 reporting that follows.

Open Dossier
№068m
Incorporation Architecture

Operating via Corporate Shells: Asset Insulation for Cross-Border Trade

Mitigating personal asset exposure while navigating cross-border commerce. The five-layer shell model and the failure modes that collapse it.

Open Dossier
№059m
Incorporation Architecture

The Non-Resident Single-Member LLC Handbook

A clear compliance roadmap for international entrepreneurs. EIN procurement without SSN, Form 5472 + Pro-Forma 1120 cycle, banking, and the first-year audit checklist.

Open Dossier
№049m
Incorporation Architecture

Anatomy of a U.S. Blocker Corporation

How international holding groups isolate U.S. tax exposure through blocker entities. Effectively connected income shields, branch profits tax minimization, and exit planning.

Open Dossier
№038m
Incorporation Architecture

Stripe Atlas / Firstbase Aftermath: When the Automation Stops

Transitioning from automated incorporation platforms to institutional cross-border structure. The eight downstream failures Stripe Atlas and Firstbase cannot resolve.

Open Dossier
№029m
Incorporation Architecture

The Disregarded Entity Hazard: The $25,000 Form 5472 Trap

How foreign founders mistakenly trigger the $25,000 IRS penalty by omitting Form 5472. The Treasury §1.6038A-1 mechanics, what counts as a reportable transaction, and the remediation timeline.

Open Dossier
№019m
Incorporation Architecture

The Wyoming LLC vs. Delaware C-Corp Blueprint

Decoupling structural options for non-U.S. resident operators. When the LLC wins on privacy and pass-through. When the C-Corp wins on capital formation and treaty integration.

Open Dossier