3D printing costs can vary enormously for what appears to be a similar job — and most of that variation traces back to design and specification decisions made before the printer ever starts. Material volume, support structures, print time, post-processing requirements, and technology selection all drive cost in ways that are largely controllable if you know what to optimize.
Here’s a practical breakdown of where 3D printing costs come from and the specific decisions that reduce them without compromising the result.
Understand What You’re Actually Paying For
3D printing cost is primarily a function of:
- Material consumed — Both the part itself and any support material used during printing
- Machine time — How long the printer runs to complete the job
- Post-processing labor — Support removal, surface finishing, curing, or secondary operations
- Technology and material selection — SLS costs more per part than FDM; engineering resins cost more than standard resins
- Setup and engineering time — File preparation, orientation decisions, and print parameter configuration
Most cost reduction levers are on the design and specification side, not the production side.
Reduce Material Volume
The most direct cost driver is how much material the part consumes. Several design strategies address this:
- Shell the part — For parts that don’t need to be solid, designing a hollow shell with sufficient wall thickness reduces material dramatically. Most slicer software has infill density settings (20–40% infill is sufficient for many functional applications); designing true hollow geometry in CAD gives you more control.
- Remove unnecessary material — Ribs, holes, and cutouts in non-critical areas reduce mass without significantly affecting strength, especially when oriented correctly.
- Right-size the part — If only a portion of a larger assembly needs to be printed, isolate that section. Printing a full housing when only a mounting bracket needs verification wastes material and time.
Minimize Support Structures
Support material is essentially wasted cost — it’s printed, then removed. Designs that minimize the need for supports reduce both material cost and post-processing labor. The key principle: most FDM printers can bridge horizontal gaps and print overhangs up to roughly 45–50 degrees without supports. Designing with this in mind — orienting features to self-support, adding chamfers instead of sharp overhangs, splitting complex parts at convenient planes — can eliminate supports entirely in many cases.
Print orientation is also a lever here. The same part printed in different orientations may require very different support volumes. Working with your print service to optimize orientation before printing is time well spent.
Choose the Right Technology for the Job
Using a more capable (and more expensive) technology than the application requires is a common source of unnecessary cost. SLA produces excellent surface quality and fine detail — but if the part is a structural bracket that will never be seen, FDM at appropriate settings delivers the same function at significantly lower cost.
A practical guide:
- FDM — Best value for functional prototypes, structural parts, tooling, and fixtures where surface finish is secondary
- SLA — Worth the premium for presentation models, fine-detail parts, and applications where smooth surfaces matter
- SLS — Higher base cost, but no support structures and excellent mechanical properties; often the most cost-effective for complex functional geometry at small volumes
Batch Jobs Where Possible
Setup time is roughly constant regardless of how many parts are in a build. Running multiple small parts in a single print job — filling the build volume efficiently — amortizes setup across more parts and reduces cost per piece. If you have several parts to print, timing them together and nesting them intelligently in the build volume is a straightforward cost reduction.
Simplify Post-Processing Requirements
Post-processing is often underestimated as a cost driver. A part that requires extensive support removal, sanding, priming, and painting can cost more in finishing labor than the print itself. If appearance requirements can be met with less finishing work — through better print orientation, a higher-quality material, or accepting the printed surface finish for non-visible areas — that labor cost drops significantly.
Work with Your Print Service Early
The most effective cost reduction strategy is involving your print service during design, not after. File preparation decisions — orientation, support strategy, infill settings — are much easier to optimize before a part is committed to print than after. At Kemperle Industries, our 3D printing services include design-for-printability review as part of the process, and we’ll flag cost optimization opportunities before they’re locked in. Get in touch to discuss your project.
