So I pulled out this napkin math that closed the deal in 5 minutes:
THEIR CURRENT INVOICE PROCESSING:
Staff:
- 3 full-time data entry people
- $35/hour × 8 hours × 22 days = $6,160/month each
- Total salary cost: $18,480/month
Errors:
- Manual error rate: 3%
- 6,000 invoices/month × 3% = 180 errors
- Cost per error (corrections, credits, relationships): $50
- Error cost: $9,000/month
Speed:
- Current: 3-day processing backlog
- Late payment penalties: $3,000/month
- Lost early payment discounts: $5,000/month
Total monthly burn: $35,480
MY PROPOSED AUTOMATION:
One-time setup: $2,500
Monthly maintenance: $500
Processing time: 30 minutes daily oversight
Error rate: 0.3% (18 errors vs 180)
Same-day processing (capture all early discounts)
Their monthly cost with automation: $599
Their monthly savings: $34,881
ROI payback period: 2.1 days
THE CEO's RESPONSE:
"Why the f*** haven't we done this already?"
*Signed contract on the spot*
THE ACTUAL BUILD:
- Gmail → PDF extraction → Validation → QuickBooks
- Built in n8n in 4 hours
- Been running for 7 months
- They've processed 42,000 invoices
- Total downtime: 47 minutes
They tried to give me a bonus last month because the savings were "embarrassing their previous decisions."
The lesson: Nobody cares about your nodes. They care about their numbers.
What's the biggest monthly saving you've delivered? Drop the actual numbers 📊