Bigcommerce + Avalara integration for accurate, automated sales tax

Connect Bigcommerce with Avalara to calculate sales tax at checkout, keep product tax codes consistent, and simplify compliance workflows across your nexus states.

Set up your integration

Trusted by 700+ leading brands worldwide

What is the BigCommerce + Avalara integration

Tax gets messy fast once you sell across states, channels, and customer types. In BigCommerce, it’s easy to end up with manual rate updates, guesswork around exemptions, and checkout tax totals that don’t match what finance expects. The result is support tickets, accounting cleanups, and a real risk of under- or over-collecting. The BigCommerce Avalara integration connects your store tax calculation to Avalara so transactions can be evaluated in real time and recorded for reporting. It ties BigCommerce checkout data to Avalara’s tax engine, keeps tax decisions consistent across orders, returns, and refunds, and supports a cleaner handoff between ecommerce ops and accounting. This setup fits if you need BigCommerce sales tax automation for multi-state compliance, exemptions, or higher order volume.

BigCommerce + Avalara integration benefits

Cut checkout tax disputes with consistent BigCommerce tax totals

Reduce audit exposure with jurisdiction-ready tax logic per order

Handle exemption customers cleanly without custom checkout hacks

Protect margin by applying the right tax rules to shipping and fees

Speed up month-end close with tax-ready transactions for finance

Scale multi-state selling in BigCommerce without manual rate upkeep

How the BigCommerce Avalara integration works technically

• BigCommerce order, customer, ship-to address, line item, and shipping charge data is sent to Avalara AvaTax for real-time tax calculation during checkout.

• Product taxability codes (when provided) are mapped to Avalara item tax codes, with fallback handling for uncategorized SKUs based on default tax rules.

• Jurisdiction results returned by Avalara are written back to the BigCommerce order as tax lines, preserving per-line and order-level tax breakdowns.

• Finalized orders are committed to Avalara as transactions; cancellations, refunds, and returns create void or adjustment entries to keep ledgers aligned.

• Customer exemption status and certificate identifiers (when used) are associated to the customer record and applied during tax calculation for eligible transactions.

• Sync processes log request/response payload metadata and error states, supporting reconciliation when totals differ between BigCommerce and Avalara.

Why choose scandiweb to handle BigCommerce integration for you?

BigCommerce builds with real-world system complexity

We’ve shipped 50+ Shopify and BigCommerce projects, so we plan Avalara around your catalog, promos, and edge cases.

Tax setup validated against real orders and refunds

We QA Avalara with end-to-end scenarios like discounts, partial refunds, and RMA flows, not just happy-path carts.

Clean integration with your ERP and finance stack

We connect Avalara to the systems that matter after checkout – ERP, accounting, and BI – so reporting stays consistent.

Tracking you can trust after the tax rollout

Our analytics team has delivered 575+ eCommerce BI dashboards, so you can spot tax-related drop-offs and fix fast.

Security-first delivery for regulated tax data flows

ISO 27001 and 27017 practices guide how we handle credentials, logs, and data access across BigCommerce and Avalara.

Scale multi-state selling in BigCommerce without manual rate upkeep

We run 24/7 SLA-backed support for 450+ active clients, covering connector failures, API changes, and release QA.

Frequently Asked Questions about BigCommerce Avalara integration

How do I connect BigCommerce to Avalara AvaTax for real-time checkout sales tax calculation?

We map BigCommerce checkout fields, customer groups, and ship-from locations to Avalara AvaTax, then validate results in a staging flow before Go-live.

What BigCommerce order data is sent to Avalara for tax calculation and reporting?

Avalara receives key fields like line items, discounts, shipping, addresses, customer tax status, and transaction totals so tax decisions and reports match the order.

Can the BigCommerce Avalara integration handle tax-exempt customers and resale certificates?

Yes – we configure exemption logic and customer tax statuses so Avalara applies the right rules at checkout and on invoices.

Does Avalara support refunds and returns from BigCommerce without breaking tax records?

Yes – refunds and credit memos can be synced as adjustments so Avalara keeps a clean transaction trail for filing and audits.

Can I use Avalara with multi-store or multi-country BigCommerce setups?

For multi-store BigCommerce, we align store channels, ship-from addresses, and nexus rules per storefront; cross-border tax needs should be scoped case by case.

Explore related BigCommerce Tax Automation integrations

Start your BigCommerce + Avalara integration

1. Submit your integration request

Fill out the form and share your integration requirements.

2. Join a free strategy & discovery call

Join a 60-minute session with our BigCommerce integration specialists.
We’ll review your business systems, identify key challenges, and uncover actionable opportunities.

3. Get a tailored proposal

After the consultation, receive a detailed proposal with clear, high-impact steps to integrate BigCommerce with the tools your business needs to thrive.