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Vertexis Nexus

Rooftop sales tax calculations at checkout, in milliseconds.

Rates are priced at the exact delivery address, not a ZIP code, across more than 11,000 overlapping jurisdictions.

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API explorerExample response
POST /v1/calculate
{
  "ship_to": { "street": "1200 Pine St", "city": "Seattle", "state": "WA", "zip": "98101" },
  "lines": [{ "sku": "TEE-BLK-M", "category": "apparel", "amount": 48.00 }]
}
{
  "taxable_amount": 48.00,
  "jurisdictions": ["state", "county", "city", "special_district"],
  "rate_precision": "rooftop",
  "tax": 4.92
}

What is behind the API

  1. 01

    Rooftop address validation

    Addresses resolve to exact coordinates, which removes the ZIP-code estimation errors that come from overlapping state, county, city and special district boundaries.

  2. 02

    Product taxability catalog

    Pre-configured rules for 5,000+ product categories, including apparel exemptions in NY, PA and MA, food and beverage rates, digital downloads, SaaS and supplements.

  3. 03

    SST sourcing

    Compatible with Streamlined Sales Tax sourcing, including origin and destination rules.

  4. 04

    Built for checkout

    A 99.99% uptime SLA and sub-25ms latency keep carts fast.

Common questions.

Still unsure? A SALT specialist can walk through your exposure on a call: +91 80 4123 0713

Can I use the API without the filing product?

Yes, though most merchants use both so the rates they charge are the rates they file.

How are rates kept current?

Jurisdiction rates and boundaries are updated against state and local bulletins.

Find out which states you owe sales tax in today.

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