- Launch Services
Overview
Chart your path to success with specialized services.Implementation Project Management
Experts to ensure you launch on time and under budget.Solution Architecture
Seasoned advisors to help you best design your store.Data Migration & Optimization
Expertise on a clean and clear path to migrating your data.Enterprise Launch Package
Personal training on how to set up and launch your BigCommerce Store.
Professional Services Blog Series
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The Global B2B Buyer Behavior Report
This in-depth report provides actionable strategies to help you sell more online.
About the App
Avalara for BigCommerce connects stores to the Avalara Agentic Tax and Compliance™ platform to calculate sales tax, VAT, and customs duties in real time and manage VAT, exemptions, and tax returns. Easy to compare and easy to buy, our simplified & transparent pricing allows you to get started on your terms—and qualifying businesses may access state-funded compliance services in up to 25 states through the SST program, potentially at no cost.
Avalara AvaTax automatically calculates sales tax on BigCommerce transactions for every merchant type, including B2C and B2B, as well as exempt customers. It uses your nexus settings, product data, and customer profiles to apply the right treatment on each transaction and improve accuracy. With 1,400+ signed partner integrations across ecommerce, ERP, billing, marketplaces, and POS, Avalara becomes your single source of tax data across your entire stack.
The Avalara Agentic Tax and Compliance™ platform processed 54B+ API calls and files 6.6M+ tax returns in 2025, and is trusted by 200,000+ direct and indirect customers worldwide.
Pricing
Custom Pricing:
Transparent pricing plans or custom set up. Compare and get started.
Information
Last Updated:
August 21, 2026
Compatible with:
CatalystMulti StorefrontSingle ClickDocumentation:
Installation GuideUser GuideResources:
Terms of ServicePrivacy PolicyApp Features
Calculate tax
Calculate sales tax, VAT, and indirect taxes in real time on BigCommerce transactions using regularly updated tax rules and rates, so shoppers see transparent, accurate tax at checkout.
Manage exempt sales
Manage tax-exempt customers within BigCommerce by uploading, collecting, storing, and accessing certificates, while AI validates details to reduce manual steps and audit risk.
Go global with cross-border sales
Calculate customs duties at checkout with Avalara Cross-Border to enable a Delivered Duty Paid (DDP) experience that reduces cart abandonment and refused packages.
Automate tax returns
Streamline multistate tax returns and VAT reporting with Avalara Returns; AI flags anomalies to keep what you charge aligned with what you file.
Simple setup
Connect Avalara to your BigCommerce store in minutes and configure your tax, product, and customer settings with in-browser guidance from the Avi Chrome Extension to help you get set up quickly and accurately.
Case Studies
GTSE smooths U.S. expansion with Avalara and BigCommerce
Having chosen BigCommerce as its ecommerce engine, GTSE had one non-negotiable criterion for its tax compliance software: integration.
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