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Worldwide tax calculations on every sale

Quaderno's VAT, GST, and Sales Tax API performs tax calculations instantly at checkout. Every sale gets the correct tax rate based on the customer’s location, pulled from a tax database that stays up to date on 12,000+ jurisdictions worldwide. Our tax engine automates other steps of compliance too, such as verifying VAT and GST numbers of your customers and sending invoices.

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Tax engine for marketplaces, embedded in your business

Quaderno’s flexible API tools integrate directly into your product, bringing tax automation to your sellers in a way that’s fast, accurate – and in your own name. It’s only your brand that users see.

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With Connect, your sellers can

  • Calculate taxes at checkout

    Our Tax Calculation API applies the correct tax rates to all of your merchants’ sales, directly in your checkout form.

  • Send invoices to their customers

    If they want to send tax-compliant invoices to buyers automatically, they can do so in HTML or PDF format.

  • Track thresholds & get tax registration alerts

    Quaderno tracks your sellers’ economic nexus, VAT and GST thresholds. They get alerts via webhooks when the business needs to register for sales tax in a new place.

  • Use instant tax reports to file returns

    Download reports that simplify their tax filing process. Accurate data, updated daily, easy to send to their team or tax advisor.
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Security & Scalability

  • Certified security

    Our security has been audited and certified with the Visma Security Program Gold standard.

  • GDPR compliant

    Quaderno is built to strict GDPR standards to protect the data of our customers and their customers.

  • REST API

    Stay flexible as you grow. Manage high volumes of data and maintain optimal performance even as your operations expand.
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The best thing about Quaderno is that it gets our data straight from the payment platforms. Hence, we have 90% of the work already done.

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Agus GarcíaChief Financial Officer

See how easy it is

Quaderno Connect offers flexible API tools that automate tax compliance for your sellers, from calculations to invoices to reporting. Built for peace of mind, from our developers to yours.

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