Bridging QuickBooks and ERP

Common SMB pattern: operations run in something specialized (Cin7 inventory, ServiceTitan field service, MindBody for fitness studios) and accounting lives in QuickBooks Online. The bridge between them is constantly leaking.

What typically syncs:

• Sales — invoices, payments — from operations to QB.
• Purchases — bills, vendor payments — from operations to QB.
• COGS / inventory adjustments — from operations to QB.
• Customer master — usually from operations.

What breaks:

• Sales tax mismatches. Operations system calculates one way, QB another. Reports won't reconcile.
• Multi-currency. Different rate sources, different rounding. Even cents matter at trial balance.
• Voided transactions. Operations void doesn't always trigger QB void cleanly.
• Date timing. Operations posts on transaction date, QB on receive date — month-end gap.

Tools:

• Native integrations — many ops tools have official QB connectors. Try first, but verify they handle all your edge cases.
• Webgility, OneSaaS, A2X — middleware specifically for QB sync. Ranges $50-300/month.
• Custom integration — only if no off-shelf works. Costs $20-50k typically.
• Spreadsheet imports — fine for <100 transactions/month, breaks at higher volume.