TaxJar API

Instantly Calculate Accurate Sales Tax

The TaxJar API provides the ability to connect with your eCommerce platforms, marketplaces, and carts in minutes and generate precise sales tax rates and calculations at the state, county, city and special taxing district level in real time.

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High performance and reliability

TaxJar’s sales tax API clocks in at sub-18ms with 99.99% uptime. Our calculations are over 99% accurate and we offer an accuracy guarantee for all TaxJar API users.

Read how API performance and scalability makes a difference
TaxJar API Uptime Screenshot
const Taxjar = require('taxjar'); const client = new Taxjar({ apiKey: '365ab65aa4d2200ce859fd64d4a762ff' }); // Get rates for a location (ZIP+4 w/ Street Address for Rooftop Accuracy) const rates = await client.ratesForLocation('05495-2086', { street: '312 Hurricane Lane', city: 'Williston', state: 'VT', country: 'US' }); // Click 'run'to see a rooftop accurate sales tax calculation

Stay on top of tax changes

TaxJar stays on top of changes at the state, county, city and special taxing district level so you don’t have to. Don’t spend another moment with rate tables or keeping up with tax changes.

Right rate every time

ZIP code rates don’t provide the level of accuracy you need for accurate sales tax collection. With TaxJar you can rely on “rooftop-level” calculations to ensure that the exact address corresponds to the right rate.

Learn more about our detailed sales tax rates and calculations
API Right Rate Screenshot

Get started with TaxJar

Let us handle the complexities of sales tax while you focus on what matters most — growing your business.
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Anthony Bott Photo
We integrated TaxJar in three weeks. One dedicated dev did it in one sprint. We were really happy with how easy it was. And since TaxJar stores everything in the cloud, we haven't had any significant downtime, and it’s scaled really well with us."

Anthony Bott

VP of Finance, logo