The Payback Question
CFOs want to know: How long until investment pays for itself? Understanding payback calculation and realistic timelines enables informed budgeting.
Payback Formula
Implementation cost ÷ Monthly savings = Months to payback
By Exception Volume (Time Savings Only)
40 exceptions monthly:
- Monthly savings: $500
- Payback: $35,000 ÷ $500 = 70 months
- Assessment: Not justified on time alone
60 exceptions monthly:
- Monthly savings: $790
- Payback: $35,000 ÷ $790 = 44 months
- Assessment: Marginal
80 exceptions monthly:
- Monthly savings: $1,600
- Payback: $35,000 ÷ $1,600 = 22 months
- Assessment: Acceptable
With Working Capital Impact (Collections)
60 exceptions monthly:
- Time savings: $790
- Working capital: $5,500
- Total monthly: $6,290
- Payback: $35,000 ÷ $6,290 = 5.6 months
- Assessment: Strong
80 exceptions monthly:
- Time savings: $1,600
- Working capital: $5,600
- Total monthly: $7,200
- Payback: $35,000 ÷ $7,200 = 4.9 months
- Assessment: Very strong
Typical Payback
Without working capital: 18-36 months
With working capital: 6-12 months
Working capital impact accelerates payback dramatically for AR collections
Cumulative Value Over Time
Year 1: Investment recovered + $10K-$40K benefit
Year 2: $75K-$95K cumulative benefit
Year 3: $150K-$190K cumulative benefit
Value compounds as volume grows and costs remain flat
The Reality
Payback typically occurs within 6-18 months.
Working capital improvements for collections accelerate payback to 5-6 months.
Volume threshold: 60+ exceptions monthly for reasonable payback timeline.
Cumulative three-year value: $150K-$390K depending on volume and working capital impact.