Sales tax calculation software, exact.
A wrong rate at checkout puts every sale at risk. Zamp returns the right sales tax in real time, for every jurisdiction, so you collect exactly what you owe.
Trusted by partners worldwide.
The right rate, every transaction.
Guaranteed accuracy.
We stand behind our rates. If a bad calculation causes a filing error, that's our problem to fix, not yours.
Under 100ms.
Rates come back in under 100 milliseconds. Your checkout doesn't wait on us, and neither does your customer.
Calculations that feed your filings.
What Zamp calculates at checkout flows straight into your Zamp returns and reports. Nothing gets re-keyed, nothing gets lost in translation.
Real-time sales tax calculation, how.
Rooftop-accurate, at checkout.
Zamp calculates tax on the buyer's exact address, the product type, and any exemption that applies, then returns the jurisdiction-level rate and amount before the order completes. Every time.
Rate tables, always current.
13,000+ jurisdictions change rates constantly. We maintain the database continuously, so state and local changes, special district updates, and new rules land before they take effect.
Taxability by product, not place.
Location is half the answer. Zamp applies the right taxability rules to your catalog, including exemptions, reduced rates, and item-level logic, so a snack and a supplement don't get the same rate.
One integration, whole stack.
Connect by API or native integration to Shopify, NetSuite, Stripe, QuickBooks, Business Central, and more. Send the product and address at checkout, get the correct rate back.
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