#3d-printing
On-demand 3D printing and print-farm bookkeeping, including per-print material and machine-time costing, failed-print cost allocation, filament inventory tracking, and Section 179 versus bonus depreciation on printer fleets
Filament is often under a third of a 3D print's true cost. A six-layer costing method — filament, electricity, wear parts, failed prints, post-processing labor, and machine depreciation — shows why a $4.20 print really costs $15.32, and how to work backwards from Etsy's ~10–12% fees to a list price with a real margin.
Filament is only 20-30% of what a 3D print actually costs - machine depreciation, a 2-25% failure rate, and labor make up the rest, and Section 179 combined with 100% bonus depreciation under the OBBBA can let a print-for-hire shop deduct a new printer's full cost in the year it's purchased.
