Ecommerce Sales Tax Software and Compliance Solutions.
Full-lifecycle sales tax compliance across all 50 US states, plus registration and filing in the EU, UK, Australia, New Zealand, Singapore, Switzerland and Malaysia - from nexus monitoring to filing, global tax workflows and B2B2C support.
Powering 1000+ Global Businesses
50
States covered
Full-lifecycle US sales tax compliance in every state
24-48h
Specialist response time
Every merchant gets a dedicated tax specialist
2yr
Nexus look-back
Historical exposure reviewed and remediated via VDA or back-filing
Stay compliant across all borders - without slowing down.
Swap automates tax compliance across the U.S. and international markets - replacing fragmented tools with one system built for scale. Expand faster, reduce risk, and stay audit-ready by default.
End-to-End Compliance Coverage
One system that doesn’t break as you scale.
Automation & Operational Load
Compliance shouldn’t consume your team.
Risk Management & Audit Readiness
Being prepared shouldn’t be reactive.
Global Accuracy & Classification
Errors compound fast at scale.
Scalability for Lean Teams
Growth without headcount creep.
Pricing & Platform Advantage
Predictable costs, connected workflows.
One system that doesn’t break as you scale.
Compliance shouldn’t consume your team.
Being prepared shouldn’t be reactive.
Errors compound fast at scale.
Growth without headcount creep.
Predictable costs, connected workflows.
Better management, less manual
We automate the painful parts of compliance: tracking where you owe, registering in new regions, filing on time, and handling notices before they hit your inbox.
No portals, no spreadsheets, and no added complexity.
- Nexus monitoring and analysis
- Automated tax registration and filing across all 50 US states, plus the EU, UK, Australia, New Zealand, Singapore, Switzerland and Malaysia
- State and tax authority mail handled for you
Stay protected (even when compliance gets complex)
Store and manage certificates, resolve historical exposure, and stay prepared as regulations change. Swap keeps everything organized, documented, and audit-ready by default.
- VDA & exemption cert management
- HS code classification to support accurate global tax treatment
- Custom return rules by product, region, or scenario
- Audit-ready reporting across markets
Built for lean teams scaling across markets
Compliance shouldn’t block expansion. Swap helps teams move fast with automation that supports international operations - without adding operational drag.
- Sales tax compliance across all 50 US states, plus supported international markets
- Built to scale with global expansion
- Operational efficiency without added headcount
- Transparent pricing
Compliance works best when it’s connected. Swap integrates tax compliance with global operations, demand planning, returns, and more - all in one system.
Ecommerce sales tax questions, answered
What is ecommerce sales tax software?
Ecommerce sales tax software automatically calculates, collects, files and remits sales tax on online orders. It monitors where a brand has crossed economic nexus thresholds, registers the business in those states, files returns on schedule and keeps audit-ready records — replacing manual tracking across state portals, spreadsheets and external accountants.
What is sales tax nexus, and when do I have to register?
Sales tax nexus is the connection that obliges a business to collect tax in a state, triggered by physical presence or by crossing that state's economic threshold for sales revenue or transaction count. Thresholds differ by state and change, so obligations appear as you grow. Swap monitors all 50 states continuously and flags each threshold before you cross it.
How does Swap file my sales tax returns each month?
Swap runs a fixed monthly cycle. After month-end, calculations are complete by the 5th and draft returns reach you by the 10th, with full supporting detail. You have up to ten days to review, question or approve. Returns are submitted on the 18th and payment initiated on the 20th, with filings and proof uploaded to your portal.
What happens if I've missed sales tax filings in the past?
Swap performs a two-year nexus audit, identifies missing filings and calculates what was owed, including estimated interest and penalties. You then choose the remedy: back-file the outstanding returns, or enter a Voluntary Disclosure Agreement, typically worthwhile once liability, interest and penalties exceed roughly $4,000. VDAs are available in the US market only.
How is Swap different from Avalara, Vertex, Numeral and Kintsugi?
Those tools treat tax as an accounting function. Swap is commerce-native: tax compliance runs inside the same platform as cross-border landed cost, shipping and returns, on one flat fee covering all 50 states. Avalara and Vertex are built for ERP-heavy enterprises; Numeral and Kintsugi are tax-only and lack cross-border landed cost.
What do VDA, nexus and HS code mean?
Nexus is the link that creates a tax obligation in a state. A Voluntary Disclosure Agreement (VDA) is a negotiated settlement with a state to resolve past unpaid tax, usually with reduced penalties. An HS code is the international classification number for a product, which determines its duty and tax treatment when it crosses a border.
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See your operations streamlined by the power of Swap.