Xero and BigCommerce
Integration Agency & Consultants
Manual reconciliation between BigCommerce and Xero usually becomes unsustainable as order volumes scale. The delay in financial reporting is often caused by the manual effort required to account for payment gateway fees and tax inclusive rounding. We build controlled financial workflows to bridge the gap between storefront transactions and the ledger, ensuring gross sales and bank deposits match. This reduces the reconciliation debt that often prevents a rapid month-end close.
Auditing financial gaps and system inefficiencies
Cogent2 connects your Xero and BigCommerce systems quickly, supporting both Accounting and Ecommerce needs. Our consulting services are invaluable, with system audit services that uncover inefficiencies and integration gaps across Xero, BigCommerce, and related Accounting and Ecommerce platforms. These audits empower our consultants and your team to take decisive action, ensuring your technology ecosystem runs efficiently. This means you can deliver a consistently excellent experience to your customers, with reliable operations and optimised processes at every stage.
Solution Design
Design begins with defining BigCommerce as the sales engine and Xero as the financial source of truth. We typically sequence the flow of orders into Xero invoices or summary journals depending on your reporting needs. A key design decision involves the trade-off between real-time data sync and batch processing. While real-time sync provides immediate visibility, batching financial postings can simplify the month-end close by reducing ledger clutter. We prioritise mapping tax rules correctly to prevent rounding discrepancies between BigCommerce gross sales and Xero deposits. This design allows finance to close the month off Xero while operations rely on BigCommerce for order fulfilment, maintaining a clean ledger.
Syncing sales data to financial records
The integration treats BigCommerce as the primary sales engine and tax calculator, while Xero acts as the financial source of truth. Orders typically sync once payment is confirmed, with line-item data mapped to specific Xero account codes for VAT compliance. To prevent ledger clutter, implementations often use aggregated daily summaries rather than individual invoices for every small transaction. We use clearing accounts to handle the difference between BigCommerce gross sales and net bank deposits, including payment gateway fees. Monitoring is used to detect order sync issues or tax mismatches before they reach the general ledger, protecting the integrity of your financial reporting.
Managing data flows on secure platforms
Leveraging IPaaS with ISO 27001 and SOC 2 and above security accreditations ensures secure, efficient integration between Xero and BigCommerce for Accounting and Ecommerce needs. IPaaS simplifies connecting Xero and BigCommerce, automating Accounting and Ecommerce data flows while maintaining strict security standards. This approach reduces manual effort, minimises errors, and supports compliance, making integration reliable and future-proof for businesses prioritising data protection and operational efficiency.
Surfacing sync errors before month end
Standard dashboards often miss the discrepancies that complicate bank reconciliation. True visibility requires seeing exactly where a BigCommerce order failed to sync to Xero, whether caused by a locked accounting period or a tax mapping error. We surface these exceptions early, categorising them so the appropriate team member can take action. Instead of discovering financial gaps during the month-end close, finance can see specific sync failures in real-time. We focus on the connection between storefront sales and Xero bank feeds, ensuring that transaction statuses remain consistent across both systems.
Establishing workflows for finance and operations
Handover ensures your finance, ecommerce, and operations teams own the new workflow. We provide an operational operating model rather than just technical manuals. Your finance team learns how to reconcile BigCommerce data against Xero ledger entries, while ecommerce teams manage order status exceptions. We establish a clear rhythm for monitoring, ensuring alerts from the integration layer reach the correct owner. Documentation is written as a practical reference for the people running the business. This anchors your team in the specific design decisions made for your store, covering tax mapping and refund processes.
Resolving reconciliation issues after launch
Post-launch support focuses on maintaining financial accuracy and protecting your month-end close. We monitor the integration for reconciliation exceptions, surfacing discrepancies between BigCommerce transactions and Xero ledger entries before they impact reporting. If sync errors or tax mapping issues occur, we manage the resolution process to prevent manual data entry. Our approach ensures the integration remains stable as order volumes scale, identifying data gaps or rounding errors that typically cause friction for finance teams. We provide ongoing technical oversight, managing the flow between your sales engine and your financial source of truth.
Common failures
Mismatched payout and sales reconciliation
Operational impact: Finance teams cannot reconcile the gross sales figures in BigCommerce with the net deposits that land in the bank from payment gateways. This is because payouts often bundle hundreds of orders and deduct variable fees, creating a time-consuming manual matching exercise in Xero. This delays month-end closing and undermines confidence in profit and loss reporting.
Prevention / Action: Design the integration to post daily sales summaries from BigCommerce to a dedicated clearing account in Xero, rather than sending individual sales invoices. When a gateway payout is received, it can be reconciled against this clearing account balance. This allows fee-per-transaction and bulk payout discrepancies to be managed as a single accounting operation, keeping the main bank reconciliation clean.
Invoice inflexibility and VAT rounding errors
Operational impact: Creating a 'Paid' Xero invoice for every BigCommerce order clutters the ledger and makes adjustments difficult, as Xero locks these transactions from being easily edited. Small rounding differences between BigCommerce's tax calculations and Xero's can also occur, creating minor but persistent reconciliation gaps. CX and finance teams are then forced into manual credit note processes for even simple post-sale adjustments.
Prevention / Action: Treat BigCommerce as the definitive source for order and tax calculation, and use a summary-based integration model. A single daily journal entry or summary invoice can record total sales, discounts, and VAT/GST liabilities in Xero. This approach avoids creating thousands of rigid invoices and centralises the granular order detail in the commerce platform, where it is most needed for operations.
Disconnected refund and credit note process
Operational impact: A refund processed in BigCommerce does not automatically create a Credit Note in Xero, leaving an open loop for the finance team. This means revenue and tax liabilities are overstated until a manual credit is created and applied in Xero. This creates significant reconciliation work during month-end close, as the cash outflow for the refund will be visible on the bank statement but has no corresponding entry in the ledger.
Prevention / Action: The integration's logic must manage the full lifecycle of an order, including returns. The process should monitor for refund events in BigCommerce and use them to trigger the creation of a draft Credit Note in Xero, correctly referencing the original sale. This ensures that every refund action has a corresponding and auditable accounting transaction, ready for finance to approve.
Product data and SKU synchronisation failure
Operational impact: If SKUs are not perfectly aligned between BigCommerce and Xero, automated transaction entry fails. An order containing a new or unrecognised SKU will be rejected by the Xero API, blocking the sync and requiring manual investigation by the ops or finance team. This can delay the recording of sales and lead to inaccurate inventory or sales reporting if the errors are not caught and corrected promptly.
Prevention / Action: Define a single system as the source of truth for creating and managing product SKUs, typically BigCommerce or a connected PIM. The integration process must include robust exception handling that queues orders with unrecognised SKUs for review, rather than failing the entire sync job. This ensures that valid transactions continue to flow while data errors are flagged for resolution.
Frequently asked questions
Will every BigCommerce order create a separate invoice in Xero? We're worried about cluttering our ledger.
This is a frequent concern, and the approach depends on your order volume and reconciliation process. Instead of creating an individual invoice for every sales order, the integration can post a daily sales summary to Xero. This single entry represents all sales for the day, making it far simpler to reconcile against bank payouts without overwhelming your ledger.
How does the integration handle payment gateway fees and daily payouts?
A common failure is trying to match gross sales from BigCommerce to the net deposit in your bank account, which creates reconciliation gaps. The integration solves this by creating a summary journal entry in Xero that matches each payout. This entry records gross sales, deducts payment gateway fees and refunds, and matches the net figure that arrives in your bank, automating a key part of the month-end close.
What happens if our finance team locks a financial period in Xero?
Attempting to sync transactions from BigCommerce into a period protected by a Xero Lock Date will cause sync errors. A correctly designed integration respects these financial controls by preventing transactions from posting into a locked period. Instead, these transactions are typically held in a queue or flagged for manual review, ensuring your closed accounting periods remain unchanged.
What is the source of truth for product data like SKUs and prices?
Typically, BigCommerce acts as the master for customer-facing data like product descriptions and the prices stored in its price lists. However, Xero remains the financial source of truth. The integration maps the BigCommerce order's SKU to the correct item record and revenue accounts in Xero, ensuring sales are posted correctly without requiring you to manage financial data in BigCommerce.
What happens if we refund an order in BigCommerce after it has already synced to Xero?
Once an invoice is marked as 'Paid' in Xero, it cannot be edited, which can complicate returns handling. To manage this, refunding an order in BigCommerce should trigger the creation of a corresponding Credit Note in Xero against the original invoice. This maintains a clean audit trail for your order-to-cash process and ensures your financial reporting in Xero accurately reflects the refund.