3D Printing Cost Breakdown: What a Part Really Costs
Most people compare 3D printing quotes by material price per kilogram, and almost never by what the job actually costs end to end. This cost breakdown is the one we walk customers through: seven lines, which one dominates by process, and which lines a headline price quietly leaves out.
Every breakdown we have ever seen is wrong for somebody, because the split moves with part size, geometry and batch quantity. A fixed percentage would mislead you, so we will not publish one. What we can do is tell you which lines exist, which one dominates, and how to make two quotes comparable.
To get a number for your part, send the drawing and quantity through the quote form — we price the lines, not a rule of thumb.
What a real quote should contain
Seven lines. If a quote has fewer than five, it is a headline, not a quote — and the difference will surface later.
- Material, at the quantity your part actually consumes, not a per-kilo figure applied to the whole build.
- Machine time — print hours, plus any hands-on or setup time the process needs.
- Supports and consumables, where the process uses them.
- Post-processing: removal, finishing, heat treatment or curing.
- Inspection and documentation — dimensional check, photos, certificates.
- Packaging, which is a real line for delicate or plated parts.
- Freight, duty and terms — which line these sit on is a scope question, and a common source of a gap between quote and invoice.
Lines 4 to 7 are the ones that get left out. They are also the ones you can negotiate, specify or simply be aware of.
Which line dominates depends on the process
The same geometry printed three ways has three different cost shapes, and the reason is simple: the consumable cost per kilo differs by orders of magnitude, while the machine hour does not.
Swipe the chart sideways to read it →
SLS: machine time leads
Nylon is inexpensive per kilo, so build length and machine time dominate. The upside is batch economics: SLS nests many parts in one build, so setup cost is amortised across the batch. As PA12 data sheets show, it is also the most forgiving material in terms of storage and reuse, which keeps the material line small.
SLA: material leads
Resin is the expensive consumable, and in SLA it is usually the largest single line. This is the process where buying "cheaper resin" reliably shows up in the total rather than being worth it — resin is the one material where a cheap additive shows up in your invoice rather than your scrap rate. SLA does gain from batching — several parts fit on one platform — but less than SLS does, because every resin part still needs its own supports, washing and curing rather than coming out support-free. The tighter the packing, the closer the two get.
SLM: everything is heavy
Metal combines powder cost, long build times and support removal. For a large metal part, post-processing can rival the print itself in cost — which is why finishing deserves its own conversation rather than being a line at the bottom of a quote. The published process numbers also matter here: our SLM layer height and tolerance are what determine build time for your geometry.
Geometry moves cost more than size
A bigger part is not simply a more expensive part. Four features change cost disproportionately to volume:
- Surface area. Cost follows the surface the process has to build, and some processes build a skin more slowly than a solid.
- Thin walls. Below the minimum wall thickness, cost rises rather than falls, because a thin feature may need more passes, more support, or a slower parameter set. We publish typical minimums for SLA, SLS and SLM — but the safe number is a conversation, not a lookup.
- Overhangs and unsupported features. Each one is support, and support is material plus labour plus a surface finish to clean up.
- Batch quantity. Moving from one to ten parts often costs far less than ten times one part, in SLS and SLM. If a part is going into production, say so at quote time.
The hidden lines
Three costs that rarely appear on a quote and frequently appear on an invoice.
Scrap and yield. A quote that assumes a first-time-right build is a quote that will move. Ask what the supplier's assumption is: a maker who prices first-time-right will quote lower and revise later, which is worse for you than a higher number you can rely on.
Finish. A machined surface, a bead-blasted one and an as-built one are not the same price, and "as printed" is rarely what a functional part needs. Decide the finish before the quote, not after.
Terms and freight. Our terms of sale state what a price includes and what it does not, and for cross-border orders the destination affects both cost and lead time. A quote that is silent on this is not cheaper, it is incomplete.
How to compare two quotes fairly
- Put them on the same scope. Same finish, same inspection, same documentation, same delivery terms. Most large gaps are scope, not margin.
- Ask for the line breakdown. If a supplier will not itemise, you cannot compare, and that is a legitimate reason to choose another supplier.
- Compare per delivered part. Divide by the number of usable parts, not the kilograms shipped. This is the same logic as the powder comparison in our metal powder buyer's guide.
- Ask how long the price holds. A quote without a validity period is not a quote.
- Watch the outlier. A far-below quote is usually a different scope or a different process decision. Ask, rather than celebrating.
A worked comparison, without the numbers
Here is the shape of a comparison we do regularly, shown without figures because the figures are the supplier's business, not ours.
A customer sends a small metal bracket. Supplier A quotes one price; supplier B quotes roughly twice that. The instinct is that B is charging more. In practice the two are usually quoting different things, and the gap comes from four questions:
- Which process and parameters? A part built with a slower parameter set to hit a tolerance nobody asked for costs more, and that choice is often invisible on the quote.
- Which material? Grade 5 and Grade 23 ELI are the same alloy with a different oxygen budget, and the ELI premium is a published step. A quote that does not name the grade is not a quote.
- What is the finish? As-built, bead-blasted and machined are three different prices. Both suppliers may be quoting the same print and different finishing.
- What is included? Inspection, documentation, packaging, freight and duty. This is the line where the gap most often hides.
Ask those four questions of both suppliers and the gap usually narrows to something you can act on: a process change, a material change, a finish change, or a quantity change. Each of those is a decision. The number on its own is not.
The version of this conversation we enjoy most is the one where the honest answer is “this will be cheaper if you print it in a different process” — and the quote goes down rather than up. That happens more often than buyers expect, and it is a normal thing to ask us.
What actually lowers cost
Not negotiating — specification. The cheapest part is the one that needed less of everything, and that is decided on the drawing, not at the counter.
- Choose the process for the function, not the price. A resin part that meets the requirement beats a metal one that is over-specified; we are happy to say so.
- Design so the part does not need support where support is avoidable. A change of orientation often removes an entire line of cost.
- Push features off the part where possible. Holes, threads and text add build time rather than adding function.
- Consolidate. Several small parts in one build share setup cost, and assembly is a real line too.
- Agree the tolerance you actually need. Tighter than the function demands costs money for no functional gain; our published tolerances are typical values, not minimums you have to accept.
Where this leaves you
The takeaway is not a number. It is that a 3D printing cost breakdown is a structured set of lines, and a headline price is only one of them. Ask for the breakdown, put two quotes on the same scope, and compare per delivered part. The cheapest headline is frequently the most expensive order.
To see what that looks like applied to your part, send the drawing and quantity through the quote form. We will itemise the lines and tell you which ones your design can bring down — including when that means recommending a cheaper process than the one you asked about. How we work is set out in how it works.
Process tolerances, layer heights and minimum wall thickness referenced here are the typical values published on our process pages. Cost structure relationships are stated qualitatively on purpose; no percentage split is published because none would hold for your part. Nothing here is a quotation.