Business Service Contract ROI Calculator
Evaluate whether a business service contract delivers positive ROI by comparing total contract costs against quantifiable savings, productivity gains, and risk mitigation benefits.
Formulas Used
Annual Total Benefits = Labor Savings + Downtime Prevention Savings + Maintenance & Repair Savings + Productivity Gain + Risk Mitigation Value
Annual Net Benefit = Annual Total Benefits − Annual Contract Cost
Simple ROI (%) = (Total Net Benefit ÷ Total Contract Cost) × 100
Net Present Value (NPV) = Σt=1..n [ Annual Net Benefit ÷ (1 + r)t ]
where r = Discount Rate and n = Contract Duration in years
Benefit-to-Cost Ratio (BCR) = Total Benefits ÷ Total Cost
BCR > 1 indicates positive return; BCR < 1 indicates a net loss.
Internal Rate of Return (IRR) = The discount rate r* at which NPV = 0, solved numerically via bisection.
Payback Period = Annual Contract Cost ÷ Annual Total Benefits (in years)
Assumptions & References
- All benefit values are self-reported estimates; accuracy depends on quality of input data.
- Cash flows are assumed to be uniform and occur at end of each year (standard discounting convention).
- Simple ROI does not account for the time value of money; NPV and IRR are preferred for multi-year contracts.
- The discount rate should reflect your organization's weighted average cost of capital (WACC) or hurdle rate. A typical range is 6–12% for most businesses.
- IRR is computed via bisection over the range [−99.99%, 1000%] with 200 iterations for precision to 8 decimal places.
- Risk mitigation value should be estimated as: (Probability of Risk Event) × (Financial Impact of Event).
- Productivity gains should be quantified as: (Hours Saved per Year) × (Fully-Loaded Hourly Labor Rate).
- References: Brealey, Myers & Allen, Principles of Corporate Finance (13th ed.); PMI, Business Analysis for Practitioners; ISO 55000 Asset Management standards.