Payback period is one of the simplest ways to explain a packaging automation investment: how long does it take the annual benefit to recover the project cost?
Start with total project investment
Do not use only the machine purchase price. Include integration, installation, freight, electrical or utility work, startup, training, tooling and other project-specific costs.
Build annual benefit from defensible inputs
- Labor savings: positions reduced or reassigned multiplied by loaded labor cost
- Scrap reduction: only savings you can support with current waste data
- Throughput improvement: use contribution margin, not total sales revenue
- Downtime reduction: include only when baseline and expected improvement are credible
Subtract recurring costs
Automation can add maintenance, service agreements, consumables, utilities and spare-parts costs. Leaving them out makes the business case look better than reality.
Simple payback formula
Payback period = Total project investment ÷ Annual net benefit
For example, a $300,000 project producing $150,000 in annual net benefit has a simple payback of 2.0 years.
Use payback with a longer-term view
Payback is useful, but it does not show the full value after the investment is recovered. A 5-year net benefit and ROI view can help decision-makers compare projects more effectively.