Small Batch 3D Printing Costs

One of the most common surprises on a quote: the second part is much cheaper than the first, and the twentieth is cheaper again — but the curve flattens out, and it never gets to nothing. Here is why, so you can order the right quantity rather than guessing.

The two kinds of cost

Every printed part is a mix of:

Costs that repeat for every part. Material, and the print time to lay it down. Twenty parts use twenty parts' worth of plastic and roughly twenty parts' worth of machine time. This never goes away — it is the floor under the price.

Costs that happen once, whatever the quantity. Reviewing the file, fixing the geometry, working out orientation and supports, slicing, setting up, and — if a part needs designing — the design time. Doing this for one part or fifty is nearly the same job.

Per-unit cost falls because the second bucket gets divided by more parts. It stops falling because the first bucket does not.

What that looks like in practice

• 1 part carries all the setup on its own. This is why a single small clip usually lands at or near the minimum order — you are not really paying for a few grams of plastic, you are paying for a job to happen at all.
• 2 to 5 parts is where the drop is steepest. The setup splits several ways and the marginal parts are close to their material-and-time cost. Going from one to five rarely costs five times as much.
• 5 to 20 parts keeps improving, more gently. Packing a plate full also helps: a plate of small parts prints more efficiently than the same parts run one at a time, because the machine is not starting and stopping and cooling between each.
• 20 to 100+ is mostly flat per unit. You are close to pure material and time. Beyond this, savings come from design changes — a part that prints faster or uses less plastic — rather than from quantity.

Our general cost guide breaks down the individual drivers.

Why plate packing matters

The machine can only print one plate at a time, but a plate holds many parts. Small parts nested together share the warm-up, the first layer, and the operator handling. Fill the plate and the per-part overhead collapses.

This has a practical consequence: there is often a quantity that costs barely more than the one you asked for. If eight parts fill a plate and you asked for six, six and eight may be close in price. Ask us — we will tell you where the plate boundaries fall for your part.

Design cost is the biggest lever of all

If your part needs designing from scratch, that design time can easily exceed the printing on a small order. It is a one-off. Spread across one part it dominates the invoice; across thirty it is noise.

So if you know you will want more later, say so now. Ordering thirty at once beats ordering one thirty times, and it also beats ordering one now and twenty-nine in six months — the setup happens twice either way.

What does not get cheaper

Being straight about the limits:

• Material is material. There is no bulk discount inside a single print.
• Print time is print time. A part that takes six hours takes sixty hours for ten.
• Post-processing. If every part needs supports removed and a surface sanded, that is per-part manual work, and it scales linearly. Heavy support and fine finishing are the two things most likely to keep your per-unit cost stubbornly high — which is an argument for designing supports out.
• Failure risk. Longer, bigger, fussier prints fail more often, and that has to sit somewhere in the price.

Where 3D printing stops being the cheap option

This is the honest bit. FDM has effectively no setup cost and a high per-unit cost. Injection moulding is the reverse: a serious tooling bill, then pennies a part.

The crossover depends on the part, but roughly:

• Up to a few hundred parts, printing is almost always cheaper and always faster.
• In the low thousands, it depends on part size and complexity — worth pricing both.
• Tens of thousands of a simple part, moulding wins, and it is not close.

If you are asking us to print thousands of identical simple parts, we will tell you that a mould is the better answer and that we are the wrong tool for the job. Where printing still wins at higher volumes is when the parts are not identical — every one different, or a design still changing.

The other reason to print a batch

Beyond cost: spares. Small functional parts break, get lost, or get lent out. While the design work is done and the machine is set up, extras are the cheapest they will ever be. For clips, brackets, jigs and fittings, ordering a few spares is nearly always the right call.

Getting a figure

Send the file or the description and tell us the quantity you are considering — or a couple of quantities. We will show you what each costs so you can see the curve rather than guess at it.

Get an estimate · upload a file · see the small batch service · how pricing works.