Rotational Molding worked example

Mold Payback with mold tooling investment of 62,500 $: a worked example

This scenario runs the mold payback calculation on the strong side: mold tooling investment of 62,500 $, with every other input held at its documented default. Use it when mold payback in rotational molding is being put in front of a capital committee and the savings story needs to hold up.

The inputs for this scenario

  • Mold tooling investment: 62,500 $ (raised for this scenario; the documented default is 25,000)
  • Gross annual savings from the mold: 18,000 $ / yr (unchanged)
  • Annual mold support cost: 2,500 $ / yr (unchanged)

Working through the calculation

  • Applying the documented formula (Net annual savings = annual savings - annual support) to the inputs above produces each figure below.
  • At this operating point the engine returns 4.03 yr for payback period, the number this scenario is built around.
  • At this operating point the engine returns 15,500 $ / yr for net annual savings.
  • At this operating point the engine returns 62,500 $ for investment.
  • At this operating point the engine returns 15,000 $ for five year net.

How this compares with the baseline

  • Against the tool's baseline example, where mold tooling investment sits at 25,000 $ and the headline result is 1.61 yr, this scenario comes in 150% above the baseline at 4.03 yr.
  • Use it when deciding whether to commission a new rotomold, re-tool an aging one, or bring an outsourced part in-house. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Payback period: 4.03 yr (headline result)
  • Net annual savings: 15,500 $ / yr
  • Investment: 62,500 $
  • Five year net: 15,000 $

Run it with your numbers

  • Every input above is editable in the live Mold Payback calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.