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Knowledge CenterUS Tax & Business Guides for
International Entrepreneurs
In-depth, IRS-sourced guides covering every business model — from remote freelancing to Amazon FBA to real estate investment. Each guide includes case studies, worked examples, and the specific tax rules that apply to your situation.
Why These Guides Exist
The United States tax code treats non-resident aliens differently depending on the type of income they earn, where the services are performed, and how the business is structured. A freelance web developer in Portugal serving US clients through Upwork faces entirely different tax rules than a Brazilian entrepreneur selling physical products through Amazon FBA — even though both operate through a US LLC. The developer’s income is foreign-source services income (zero US tax), while the Amazon seller’s income may be effectively connected income (taxed at graduated rates) because inventory stored in US warehouses creates a US trade or business.
These distinctions are not academic. They determine whether you owe the IRS nothing, 30% of your gross income, or graduated rates on your net income. They determine whether you need to file Form 1040-NR, whether FIRPTA withholding applies when you sell property, and whether your estate faces a $345,000 tax bill if something happens to you while owning US assets. Getting the classification wrong — or simply not knowing which rules apply to your specific business model — is the single most expensive mistake international entrepreneurs make.
Each guide below is built around the specific IRS rules that apply to that business model. We cite the actual Internal Revenue Code sections — IRC §861 for income sourcing, IRC §871 for the capital gains exemption, IRC §897 for FIRPTA, IRC §871(d) for the rental income election. We include worked examples with real numbers so you can see exactly how the math works for your situation. And we include case studies based on common scenarios we see in practice, so you can find the one that most closely matches your own circumstances.
These guides are not legal advice — they are educational resources designed to help you understand the rules before you speak with a CPA. The tax code changes, treaty interpretations evolve, and your specific facts may create exceptions that a general guide cannot address. But understanding the framework first means you can have a far more productive conversation with your tax advisor, ask the right questions, and avoid the most common and costly mistakes.
Choose Your Business Model
Industry-Specific Tax Guides
Each guide covers the IRS rules, case studies, and step-by-step strategies specific to your type of business. Select the one that matches your situation.
Remote Service Providers
Freelancers, Consultants & Agencies
The IRS sourcing rules that allow non-residents to serve US clients on Upwork, Fiverr, and directly — while paying zero US tax on their service income. Covers IRC §861-865, the W-8BEN process, and platform-specific strategies for freelancers and consultants.
- IRS Sourcing Rules (IRC §861-865)
- Upwork, Fiverr & Toptal Setup
- W-8BEN Walkthrough
- B2B & B2C Direct Services
- US Travel Allocation Rules
25 min read
.
3 case studies
.
15 FAQs
E-Commerce Sellers
Amazon FBA, Shopify & Digital Goods
Why Amazon FBA creates ECI through US-based inventory while Shopify dropshipping stays foreign-source. The critical distinction between physical and digital goods, sales tax nexus after South Dakota v. Wayfair, and marketplace facilitator laws across all 50 states.
- Amazon FBA ECI Analysis
- Shopify & Dropshipping Rules
- Sales Tax Nexus (Wayfair)
- Marketplace Facilitator Laws
- Digital Goods Sourcing
30 min read
.
4 case studies
.
15 FAQs
SaaS & Digital Products
Software, Courses & Content Creators
The 2025 IRS final regulations (T.D. 10022) that classify digital transactions into four categories. How SaaS qualifies as services income, when digital downloads become royalties, and the platform setup guides for Whop, Gumroad, Stripe, and Teachable.
- IRS 4-Category Framework
- SaaS as Services Income
- Royalty vs. Copyrighted Article
- Treaty Rates for Royalties
- Platform Setup Guides
28 min read
.
4 case studies
.
15 FAQs
Stock & Crypto Traders
Capital Gains, Dividends & DeFi
The capital gains exemption under IRC §871 that makes stock trading tax-free for non-residents, dividend withholding treaty rates for 11 countries, the trading safe harbor under IRC §864(b)(2), and the evolving IRS treatment of cryptocurrency, DeFi, and staking income.
- Capital Gains Exemption (IRC §871)
- Dividend Treaty Rates
- Trading Safe Harbor
- Crypto as Property
- DeFi & Staking Taxation
27 min read
.
4 case studies
.
15 FAQs
Digital Nomads
Tax Residency, Travel & Compliance
The substantial presence test with the weighted 3-year formula, the closer connection exception (Form 8840), treaty tie-breaker rules, and how your travel patterns between countries affect income sourcing and tax obligations. State tax residency traps included.
- Substantial Presence Test
- Closer Connection Exception
- Treaty Tie-Breaker Rules
- Income Allocation Formula
- State Tax Residency Traps
26 min read
.
4 case studies
.
15 FAQs
Real Estate Investors
FIRPTA, Rental Income & Estate Tax
FIRPTA withholding mechanics, the §871(d) ECI election that can cut rental income taxes by 80%, NRA ownership structures (direct vs. LLC vs. foreign corporation), and the $60,000 estate tax exemption trap. Includes treaty benefits for 16 countries.
- FIRPTA Withholding (3 Tiers)
- §871(d) ECI Election
- Ownership Structures
- Estate Tax ($60K Exemption)
- Treaty Estate Tax Benefits
35 min read
.
4 case studies
.
15 FAQs
Content Creators
YouTube, Twitch, Patreon & Influencers
How YouTube AdSense ad revenue qualifies as services income (foreign-source when created abroad) while YouTube Premium royalties face 30% withholding. Covers sponsorship income sourcing, merchandise sales, multi-platform strategies, and the W-8BEN process that reduces withholding to treaty rates.
- YouTube AdSense vs. Premium
- Sponsorship Income Sourcing
- Merchandise Sales Rules
- Platform Tax Comparison
- W-8BEN for Creators
30 min read
.
4 case studies
.
15 FAQs
Industry-Specific Tax Guides
Many international entrepreneurs operate across multiple business models simultaneously. You might run a SaaS product while also trading stocks, or provide consulting services while investing in US real estate. In these cases, the tax treatment is determined separately for each income stream. Your consulting income follows the services sourcing rules (foreign-source if performed abroad), while your rental income follows the real property rules (always US-source, subject to FIRPTA on sale).
If you are unsure which guide to start with, here is a simple framework: identify your primary income source — the one that generates the most revenue — and read that guide first. It will give you the foundational understanding of how the IRS classifies your income. Then read any additional guides that apply to your secondary income streams. The cross-links at the bottom of each guide will point you to the related topics.
I sell services (consulting, design, development)
Your income is sourced based on where you physically perform the work. If you work from outside the US, your income is foreign-source — even if your clients are American companies.
I sell physical products online
The key question is where your inventory is stored. US-based inventory (Amazon FBA) creates ECI. Dropshipping from overseas suppliers typically does not. Sales tax nexus rules also apply.
I sell software, courses, or digital products
The IRS classifies digital transactions into four categories. SaaS is typically services income (foreign-source). Software licenses may generate royalties (subject to withholding). The distinction matters enormously.
I trade stocks, crypto, or other investments
Non-residents enjoy a complete capital gains exemption on stocks and crypto. Dividends are subject to 30% withholding (reducible by treaty). The trading safe harbor has specific requirements.
I travel frequently or live in multiple countries
Your days in the US determine whether you pass the substantial presence test. The weighted 3-year formula, closer connection exception, and treaty tie-breaker rules all affect your tax status.
Step-by-Step Service Guides
How-To Guides for Every Step
Beyond understanding the tax rules for your business model, you need practical guidance on forming your LLC, opening bank accounts, building credit, and setting up payment processing.
How to Use These Resources
We recommend a three-step approach. First, read the industry guide that matches your primary business model. This gives you the tax framework — which IRC sections apply, how your income is classified, and what your filing obligations are. Second, read the service guides in order: LLC Formation first (the legal foundation), then Bank Account Setup (the financial infrastructure), then Tax Strategy (the optimization layer), and finally Compliance (the ongoing obligations). Third, schedule a consultation with James Baker to review your specific situation, confirm the strategy, and begin implementation.
Every guide includes cross-links to related topics, so you can navigate between them naturally. The FAQ sections at the bottom of each guide are structured with schema markup, which means they may appear directly in Google search results — making it easy to find specific answers later. And every guide is updated regularly as IRS rules change, new regulations are issued, and court decisions clarify ambiguous areas.
Ready to Get Expert Guidance?
Beyond understanding the tax rules for your business model, you need practical guidance on forming your LLC, opening bank accounts, building credit, and setting up payment processing.