U.S. SALES TAX FOR INTERNATIONAL BUSINESSES
Selling in the U.S.? Know where sales tax applies.
Your company can have U.S. sales tax obligations without an office in America. IST helps international businesses assess nexus, register where needed, and manage state-by-state compliance.
Designed for businesses entering the U.S. market or already selling across multiple states.
THE FIRST QUESTIONS
What should we check first?
01 Where you sell
States receiving your U.S. orders
02 Where you operate
Inventory, warehouses, personnel, or other presence
03 How you sell
Direct sales, marketplaces, and transaction history
Nexus, taxability, and registration requirements must be reviewed by state.
THE U.S. SYSTEM
One country. Different state sales tax rules.
U.S. sales tax is not one national VAT-style system. States and local jurisdictions can apply different rules to sales, products, services, exemptions, and filing obligations.
Economic nexus
Sales into a state may create duties even when your company has no physical location there.
Physical presence
Inventory, warehouses, employees, or other activities can change the analysis.
Marketplace sales
A marketplace may collect tax on facilitated sales, but that does not automatically settle every seller obligation.
WHO THIS IS FOR
International companies building U.S. sales.
IST works with businesses that need a practical compliance process before or after expanding into U.S. states.
- Non-U.S. ecommerce and direct-to-consumer sellers
- Businesses using U.S. fulfillment centers or third-party warehouses
- Software and service businesses selling to U.S. customers
- Growing companies with U.S. sales history but unclear registrations
IST MANAGED SERVICES
From first nexus review to recurring filings.
IST handles the compliance workflow beyond tax-rate calculation, with specialist oversight and connected data support where applicable.
01
Nexus analysis
Review state sales activity and physical-presence factors to identify where obligations may arise.
02
State registrations
Prepare registration steps and establish accounts where the state-by-state review indicates they are needed.
03
Returns and remittance
Manage ongoing filing calendars, returns, and related remittance workflows.
04
Notice management
Review correspondence from tax authorities and coordinate the response and follow-through.
05
Past exposure remediation
Assess historical sales and potential missed obligations, then evaluate suitable cleanup paths.
BEFORE AND AFTER MARKET ENTRY
The earlier you review exposure, the clearer the next step.
Already making U.S. sales? Start with your history. Just entering the market? Start with your planned sales model and where your business will operate.
Before your first U.S. orders
Review anticipated states, fulfillment arrangements, product or service taxability, and registration timing.
After sales have started
Review historical state activity, marketplace transactions, inventory locations, existing permits, and prior filings.
YOUR COMPLIANCE PATH
A clear process for an unfamiliar tax system.
01 / PROCESS
Review the footprint
Map U.S. customers, states, sales channels, and physical presence.
02 / PROCESS
Prioritize obligations
Assess nexus, registration status, and historical exposure.
03 / PROCESS
Set up compliance
Address registrations and define a filing schedule based on confirmed obligations.
04 / PROCESS
Manage ongoing work
Coordinate returns, notices, and changes as U.S. sales grow.
MANAGED + CONNECTED
A specialist-led process, supported by your business data.
IST combines managed sales tax work with connected workflows. Where relevant, its AutoFill capability can help prepare tax-related document information for human review.
The exact integrations and document requirements are assessed for each business. IST does not present AutoFill as an autonomous tax decision-maker.
What your team can bring to the review
- Sales by state and transaction date
- Marketplace versus direct sales records
- Inventory and U.S. fulfillment locations
- Product or service descriptions
- Past registrations, returns, or tax notices
QUESTIONS INTERNATIONAL SELLERS ASK
U.S. sales tax, explained simply.
Do we need a U.S. office to owe sales tax?
Not necessarily. Economic nexus can arise from sales into a state. Inventory or other physical presence can also matter. Each state has its own rules.
Is U.S. sales tax the same as VAT?
No. U.S. state and local sales tax rules differ from VAT systems. Product or service taxability, collection, and filing obligations must be evaluated by jurisdiction.
If a marketplace collects sales tax, are we fully covered?
Not always. Marketplace facilitator laws can affect collection duties, but registration, reporting, direct sales, and other obligations may still require review.
What if we have been selling into the U.S. without registering?
IST can review historical activity, assess potential exposure, and help evaluate appropriate remediation steps, including state-specific options where available.
Can the free Nexus Checker determine our exact obligations?
No. It is an initial screening tool. A state-by-state review is needed before relying on a final registration or filing decision.
START WITH CLARITY
Know your U.S. exposure before it becomes a surprise.
Start with a nexus screening or speak with IST about a managed compliance plan for your U.S. sales.