UK Construction Saves 1 Workday Weekly

This client is a growing UK construction company running 50+ jobs a week, invoicing every one of them out of QuickBooks Online.

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Every invoice was created by hand: the accounts team keyed in customer details, line items, and amounts for each job, then tracked payment status separately across spreadsheets, emails, and QuickBooks.

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At 15 to 20 minutes per job, that repetitive copy-paste work added up to a full working day a week, and the brief was to connect the systems so invoices and payment status updated themselves with zero manual entry.

• The accounts team created every invoice by hand in QuickBooks Online, entering customer details, line items, and amounts manually for each job
• Every new job meant 15 to 20 minutes of copying data between the job-management workflow and QuickBooks, across 50+ jobs a week
• Payment status had no single source of truth, forcing the team to chase updates across spreadsheets, emails, and QuickBooks separately
• At 50+ jobs a week, the cumulative manual effort consumed an entire working day that could have gone toward higher-value work

• Eliminate manual invoice creation for every job logged
• Give payment status one single source of truth instead of three
• Reclaim the working day a week currently lost to copy-paste work
• Meet Intuit's production API requirements for a fully compliant integration
• Build an integration the client's own team could run without ongoing dependency on outside developers

• Connected QuickBooks Online via secure OAuth2 authentication, meeting Intuit's production API requirements from day one
• Built webhook listeners so payment status updates flow in real time, removing the need to check QuickBooks manually or update spreadsheets
• Automated customer creation and invoice generation, so the moment a job is logged the pipeline creates the customer if new, generates the invoice with correct line items, and sends it with zero manual input
• Built and tested the integration in Intuit's sandbox environment before securing approved production API keys
• Deployed the full integration on the client's own n8n Cloud instance, so the client owns and runs the automation directly

• 15 to 20 minutes saved per job - Every invoice that used to require manual entry now creates and sends itself
• 50+ jobs automated end to end every week - Covers the full cycle from job logged to invoice sent to payment status tracked
• 1 full working day reclaimed every week - Time the accounts team now spends on higher-value work instead of copy-paste
• Zero manual entry across the invoicing cycle - Customer creation, invoice generation, and payment tracking all run without anyone touching a keyboard
• Production-grade integration, not a workaround - Built through Intuit's sandbox and approved for production API access, running on the client's own n8n Cloud instance

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