UAV & Drone Manufacturing worked example

Warranty Return Cost at 6.9% warranty return rate: a worked example

This scenario runs the warranty return cost calculation on the strong side: 6.9% warranty return rate, with every other input held at its documented default. A finance analyst pricing the warranty return burden into the unit cost of a consumer or commercial drone line.

The inputs for this scenario

  • Drones sold under active warranty: 800 units (unchanged)
  • Cost to process each RMA return: 210 $/return (unchanged)
  • Warranty return (RMA) rate: 6.9 % (raised for this scenario; the documented default is 6)
  • Fixed returns program overhead: 3,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total cost = units sold x processing cost per return x warranty return rate + returns program overhead) to the inputs above produces each figure below.
  • At this operating point the engine returns 14,592 $ for total warranty return cost, the number this scenario is built around.
  • At this operating point the engine returns 18.24 $ / piece for warranty return cost per unit.
  • At this operating point the engine returns 11,592 $ for variable warranty return cost.
  • At this operating point the engine returns 3,000 $ for fixed warranty return cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where warranty return rate sits at 6% and the headline result is 13,080 $, this scenario comes in 11.56% above the baseline at 14,592 $.
  • Use it when setting a warranty reserve per airframe, quoting an enterprise fleet deal, or building the business case to fix a recurring field failure. 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

  • Total warranty return cost: 14,592 $ (headline result)
  • Warranty return cost per unit: 18.24 $ / piece
  • Variable warranty return cost: 11,592 $
  • Fixed warranty return cost adder: 3,000 $

Run it with your numbers

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

Last reviewed 2026-05-12.