Developers: Introducing Zamp’s Free API Trial

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Sales tax is complex. Paying for it shouldn't be.

From first nexus to multi-jurisdiction complexity, invest in a partner that delivers accurate filings, fewer surprises, and real peace of mind as you scale.

Free

Best for teams who want clarity on tax exposure.

Key features:

Nexus & exposure assessment

  • One-time nexus analysis
  • Historical liability exposure estimate
  • Jurisdiction-by-jurisdiction risk summary

Product taxability review

  • Taxability classification by product / service
  • State and country-specific rule application
  • Review of edge cases (e.g., mixed offerings)

Expert consultation

  • 30-minute session with a senior sales tax professional
  • Review of current setup, risks, and recommended next steps

API sandbox access

  • Free, production-grade API trial environment
  • Test rates, taxability, and edge cases before go-live
  • Preloaded with all remote-seller state registrations
  • Rate-limited, 30-day sandbox with automatic cleanup
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U.S.

Perfect for teams who need audit-ready compliance while scaling.

All the features of Free, and:

Rooftop-accurate tax calculations

  • Geospatial rate determination at the address level
  • Real-time address validation
  • Product-specific taxability rules
  • Support for exemptions, reduced rates, and tax holidays
  • Audit-defensible calculation logic

Proactive nexus monitoring & registration

  • Real-time threshold tracking by state
  • 80% early-warning alerts
  • Automated state registrations and account setup
  • Ongoing obligation monitoring

Automated filing & remittance 

  • AI-powered return preparation and submission
  • Direct ACH remittance to states
  • Early-filing discount capture
  • Automatic filing frequency management

End-to-End Notice Management

  • Daily state portal monitoring
  • AI-assisted notice classification
  • Expert response and resolution
  • Centralized, searchable notice archive

Dedicated U.S. tax expertise

  • Former state auditors and senior tax specialists
  • Support for complex scenarios (e.g., marketplaces, drop-ship, new SKUs)
  • Continuity of ownership and account context
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Global

Specifically for teams who need enterprise-grade global compliance.

All the features of U.S., and:

Global VAT & GST calculations

  • Country-specific rate determination
  • Buyer location validation
  • Digital vs. physical product tax logic
  • Reverse-charge, marketplace, and refund handling
  • Local currency support

International threshold monitoring

  • Country-by-country registration thresholds
  • Expansion alerts before obligations trigger
  • Unified global liability view

Streamlined global registrations

  • Guided VAT / GST ID registration workflows
  • Tax ID tracking and management
  • Country-specific compliance requirements visibility

Unified international filing & reporting

  • Multi-country return preparation and submission
  • Normalized, return-ready transaction data
  • Central dashboard for deadlines, status, and audit trail

Cross-border tax expertise

  • VAT / GST specialists with international audit experience
  • Support for complex entity structures and supply chains
  • Defensible documentation and regulatory readiness
View all features

1,200+ finance and accounting teams have saved thousands of hours with Zamp

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Find the right plan for you.

Zamp is the operating system of sales tax for growing businesses. Our plans scale with your needs.

Compare Plans

Assess and diagnose

One-time nexus assessment

Product taxability assessment

Historical liability exposure analysis

Expert tax consultation

API sandbox environment

Tax calculation and determination

Rooftop-accurate rate calculation

Real-time address validation

Product-level taxability rules

Exemption & resale certificate logic

Reduced rates & tax holidays

VAT / GST rate calculation

Cross-border product classification

Reverse charge handling

Marketplace & platform rules

Refunds & credit note tax logic

Local currency tax support

Nexus and registrations

Ongoing nexus monitoring

80% early-warning alerts

Automated U.S. state registrations

State account setup & portal linking

International VAT / GST threshold monitoring

Country-specific registration requirements

VAT / GST registration & tax ID management

VAT ID validation & reverse-charge eligibility

Filing and remittance

Return preparation

AI-powered filing submission

Direct ACH remittance

Early-filing discount capture

Filing frequency management

Multi-country VAT / GST filings

Centralized global filing calendar

Audit, notices and risk management

Automated state notice monitoring

AI-assisted notice classification

Expert-led notice resolution

Audit support & representation

Centralized notice & audit archive

International audit support

Reporting, reconciliation and close

Liability reporting by jurisdiction

GL-ready reconciliation reports

Audit-ready transaction history

Multi-entity support

Multi-country reporting

Integrations and platform

ERP and accounting integrations

E-commerce and billing integrations

Real-time data sync

API access (production)

Multi-currency settlement support

Support and ownership

Access to tax professionals

Dedicated account manager

Former auditors

End-to-end compliance ownership

White-glove onboarding

Global tax specialist coverage

FAQ.

Still have questions? Call us at 1-866-438-9267
or email us at support@zamp.com.

 Why don’t you list fixed prices by state or per filing?

Sales tax complexity varies widely by product mix, number of states, entities, and historical exposure. Flat per-state or per-filing pricing often hides risk and leads to add-ons later. Zamp scopes pricing based on your actual footprint and compliance needs so coverage is complete, predictable, and audit-ready from day one.

Why do the U.S. and Global plans require a conversation with sales?

Sales tax setups differ by business model, jurisdictions, entities, and prior history. A short assessment ensures the right coverage and configuration. In over 80% of companies, we uncover gaps or issues from prior providers that need to be addressed upfront.

Can I get started with Zamp before speaking to sales?

You can explore calculations and taxability in the API sandbox. Full platform access is configured around your products, entities, and integrations to ensure accuracy and audit-ready compliance.

Are plans one-size-fits-all, or tailored to each company?

Plans are designed by stage of growth, then scoped to your specific nexus, jurisdictions, entities, and systems so compliance scales cleanly and defensibly.

What happens if there’s an error or a deadline is missed?

Zamp owns the outcome. Under the Zamp Commitment, if a Zamp-managed calculation or filing results in penalties or interest, Zamp covers the cost. Accuracy, deadlines, and compliance risk are fully backed.

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“Zamp’s pricing model allowed me to be confident in the cost I budgeted for sales tax across our portfolio of companies. There have been no surprises.”

Matthew Rehurek

CFO of The Hedgehog Company 

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