US Sales Tax Calculator

Use Cases Cluster

Ecommerce Sales Tax

Direct Answer

Ecommerce sales tax is a business workflow problem: determine nexus, decide who collects, identify the buyer destination, apply product taxability, and store evidence for the order. The calculator supports the rate-estimation step, not the whole compliance decision.

Instant Calculator

Calculate Sales Tax

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Dallas, Texas combined rate

8.2%

State-level estimate using 2026 population-weighted average local sales tax data; verify by address before collecting or filing.

State tax
$6.25
Local tax
$1.95
Total tax
$8.20
Final amount
$108.20

Ecommerce Decision Flow

1. Nexus: decide whether the seller has a collection obligation in the buyer state.
2. Channel: determine whether the order is direct-to-consumer, wholesale, or marketplace facilitated.
3. Destination: use the shipping ZIP or full address to estimate state and local rates.
4. Taxability: check whether the item, buyer, or certificate changes the tax treatment.
5. Evidence: store rate, ZIP, exemption, and collection details with the order.

Real Scenarios

Direct Shopify order

The seller usually owns the nexus check, destination rate, product taxability, and invoice record.

Marketplace order

The marketplace may collect tax, but the seller still needs order-level documentation.

B2B exempt buyer

A valid exemption or resale certificate can change collection even when the destination rate is known.

Marketplace And Nexus Notes

Marketplace facilitator rules and economic nexus thresholds are separate concepts. A marketplace can collect on marketplace orders, while the same seller may still need to evaluate direct website orders in the same state.

FAQ

Sales Tax Questions

What is ecommerce sales tax?+

Ecommerce sales tax is tax collected on online orders when a seller or marketplace has a state obligation and the product is taxable.

What creates sales tax nexus for online sellers?+

Nexus can come from physical presence, inventory, employees, affiliates, or economic thresholds based on sales volume or transaction count.

Do marketplace rules replace seller compliance?+

Marketplace facilitator rules can shift collection on marketplace orders, but sellers still need records, direct-store review, and state-specific reporting awareness.

Does Shopify collect sales tax automatically?+

Shopify can help calculate and collect tax when configured, but the seller is responsible for registration, nexus decisions, product settings, and filing.

Does Amazon collect marketplace sales tax?+

Amazon and other marketplaces may collect tax under marketplace facilitator laws, but sellers should keep reports and separate marketplace sales from direct sales.

Which address matters for ecommerce sales tax?+

For shipped orders, the delivery destination is often the practical rate input. State sourcing rules should still be verified.

Do digital products need sales tax?+

Digital product taxability varies by state. Software, downloads, subscriptions, and SaaS can be taxed differently from physical goods.

What records should ecommerce sellers keep?+

Keep order date, destination, taxable subtotal, rate, tax collected, exemption documents, marketplace collection status, and refund adjustments.

Can ecommerce sellers ignore states with low sales volume?+

Not safely. Sellers should monitor economic nexus thresholds because a promotion, marketplace growth, or seasonal spike can create obligations.

Related Tools

US sales tax calculatorPrimary calculator page for amount, ZIP code, tax breakdown, and final total.Sales tax by ZIP codeLocation-based sales tax logic, ZIP limits, and jurisdiction accuracy.Local sales taxCity, county, district, transit, and other local sales tax layers.City sales taxUnderstand when a city or municipality can add sales tax on top of state and county rates.County sales taxLearn how county-level tax can affect the final combined sales tax rate.Special district sales taxReview transit, district, school, and special-purpose local tax layers.Reverse sales tax calculatorBack out the pre-tax price and tax amount from a final tax-included total.Tax included calculatorSeparate embedded sales tax from a price that already includes tax.Sales tax for ecommerceBusiness scenarios for nexus, marketplace collection, and checkout tax.US sales tax rulesConceptual sales tax rules for taxability, sourcing, exemptions, and nexus.2026 state sales tax ratesCompare state rates, average local rates, and combined sales tax rates across the United States.

Use these pages to verify rate logic, ZIP accuracy, ecommerce obligations, and state-level data before relying on an estimate.