AM Cost

3D Printing Cost Estimation: What Drives Cost Per Part and How to Quote

What actually drives additive cost per part, how to build a defensible service bureau quote, and the estimating errors that erode margin on FDM, resin, and powder bed work.

A defensible additive quote has five cost buckets: material, machine time, direct and post-processing labor, scrap and failure allowance, and overhead. On a typical polymer service bureau job, machine time and labor together run 55 to 75 percent of cost, while material is often only 15 to 30 percent. Estimators who obsess over grams of filament and ignore build hours miss where the money actually sits. Build the quote bottom-up, one bucket at a time, then check margin against the sell price. Underquoting almost always traces to a machine hour rate set too low or a failure allowance set to zero.

Material cost is the easiest bucket but still trips people up on shared and support material. Price per accepted part, not per attempted part, so a build with 42 dollars of filament and 36 good parts carries 1.17 dollars per part, and rejects pull that number up. Photopolymer resin at 0.10 to 0.15 dollars per milliliter and metal powder at 60 to 120 dollars per kilogram change the calculus completely: a 378 ml resin build is under 45 dollars of material, while a 7.5 kg metal powder build can exceed 700 dollars. Use Filament Cost Per Part or Resin Cost Per Part to lock the material line before layering anything else.

Machine time is the biggest lever and the most under-costed. Build a real machine hour rate from ownership, service, facility, and operating burden: 22 plus 8 plus 6 plus 14 dollars per hour totals 50 dollars per hour for a mid-range polymer printer. That number is sensitive to utilization, because depreciation spread over 3000 booked hours per year is roughly double the rate of 6000 hours. Multiply the rate by planned print hours from the 3D Print Time estimate: an 11.8 hour build at 50 dollars per hour is 590 dollars of machine time, which will dwarf the 12 dollars of filament in that same job.

Support and post-processing labor is where quotes quietly bleed. Support removal on a dense resin or metal part can run 4 to 8 hours, and at a 48 dollar per hour post-processing rate with 90 percent chargeable capture, 6.5 hours is 280 dollars before setup. Many shops fold this into a vague finishing fee and undercharge by half. Price it explicitly with the Support Removal Labor and Support Material Cost calculators, then compare orientations, because an orientation that saves 2 print hours but adds 3 removal hours loses money at these rates. Post-processing frequently exceeds machine cost on small, feature-dense parts.

Scrap and failure allowance is the bucket estimators skip and controllers hate. If print yield runs 93 percent, then 7 percent of your material, machine time, and setup labor produced nothing sellable and must be recovered across good parts. On a job costing 800 dollars at that yield, roughly 56 dollars of failure exposure belongs in the quote. Powder processes add a reuse angle: reused qualified powder can offset material cost, but sieving and qualification carry their own burden, so net savings on 45 kg at 72 dollars per kilogram might be 3240 dollars of avoided virgin cost minus 440 dollars of handling. Model it with Powder Reuse Savings before assuming free reuse.

Overhead and setup are fixed adders that ruin low-volume quotes when spread wrong. A 240 dollar setup and 160 dollar overhead burden on an 80 part build adds 400 dollars, or 5 dollars per part, but on a 5 part prototype run the same 400 dollars is 80 dollars per part. This is why one-off prints need minimum charges: below roughly 6 to 10 parts, fixed cost dominates and per-part pricing looks absurd unless a floor price applies. Total the buckets in a printed part cost model, then divide by accepted quantity to get an honest cost per part before margin.

Turn cost into price with margin, not markup, so discounts do not silently erase profit. Gross margin equals margin dollars divided by selling price: a 6200 dollar quote on 4100 dollars of cost is 2100 dollars, or 34 percent margin. Service bureau targets typically sit between 30 and 55 percent depending on complexity and rush level, and rush jobs on tight machine calendars justify the top of that band. Use the Additive Quote Price calculator to test the margin before it goes out, and reprice if a genuine failure allowance drops you under target rather than absorbing the risk.

Estimates go wrong in four repeatable ways: a machine rate that ignores true utilization, a support labor line buried in finishing, a zero failure allowance, and fixed setup spread as if every job were high volume. Catch them with a checklist. Does the machine rate reflect actual booked hours. Is support removal a separate priced line tied to orientation. Is failure allowance at least the inverse of measured yield. Are setup and overhead divided by accepted parts, with a minimum charge on runs under 10 parts. Clear those four and your additive quotes hold margin instead of eroding it on the back end.

Published 2026-07-01.