If you need plastic parts made, you have two main choices: build a mold and inject plastic into it, or print the parts directly from your file. Injection molding has the lowest price per part at very large quantities. 3D printing has no tooling cost, delivers parts in days and lets you change the design at any time. For most products selling in the tens, hundreds or low thousands, printing gets you to market sooner and for less money.

The short answer

Under a few thousand identical parts: 3D printing usually costs less in total, because there is no mold to pay for.
Need parts this month: 3D printing. First parts are printed in 2–3 business days; a production mold takes 2 to 4 months before the first part exists.
Design still changing: 3D printing. A new file is simply the next batch.
Tens of thousands of one unchanging part: a mold earns its cost back. Many companies still print the first runs while the mold is being made.

What an injection mold really costs

A mold is a precision tool machined from metal, and you pay for it before you get a single part. A hardened steel production mold commonly costs $50,000 to $70,000, and large, complex or multi-cavity tools pass $100,000, depending on part size, complexity and the number of cavities. Every separate part number needs its own mold.

That cost has to be spread across the parts you actually order. A $50,000 mold adds $5,000 to each part on a 10-part order, $500 on a 100-part order, $100 on a 500-part order and $50 on a 1,000-part order. That is before any plastic, machine time or shipping.

What a printed production part costs

Printed production has no tooling, so the price is the part itself. As an example, here is a PETG bracket measuring 50 × 30 × 40 mm, priced by our quote system in November 2026, before shipping and tax. Your own price depends on your part:

10 parts: $2.00 each
25 parts: $1.32 each
100 parts: $1.17 each
Over 100 parts: every run is custom quoted

On a 100-part order, this example bracket costs $1.17. The molded one starts at $500 of tooling per part. You can check your own part in seconds with the instant quote, or see how the price is built on the cost calculator.

Lead time: days against months

A mold has to be designed, machined, test-shot and corrected. A steel production mold typically takes 2 to 4 months, and longer when samples need changes. A print run starts from your file. We print first parts in 2–3 business days, you approve one, and the batch follows. If a missing part has stopped a line, next-business-day printing is available.

Design changes and versions

A mold freezes the design. Moving a hole, thickening a wall or adding a clip means reworking the tool or cutting a new one. With printing, you send a revised file and the next batch is the new revision, with nothing scrapped. The same goes for versions: left and right, three sizes, a customer's name on each part. A mold makes one shape. A print plate can hold a different part in every position.

Shapes a mold cannot make

Molded parts need draft angles so they release from the tool, and features such as undercuts and side holes need extra moving sections that add cost. Printed parts have none of those limits. Internal channels, undercuts, lattices and several pieces combined into one part print as easily as a plain block, which often removes assembly steps.

Inventory and cash

Molding rewards big batches, so you buy and store months of stock and hope the forecast was right. Printed production is made to order: 50 parts this week, 50 next month. Your cash stays in the business and nothing sits on a shelf.

How to choose

Print when you need parts quickly, when yearly demand is under a few thousand, when the design may change, or when you sell several versions.
Print first, mold later when you expect high volume but want sales and customer feedback before you commit to tooling. This is called bridge production.
Mold when one unchanging part will sell in the tens of thousands and you can wait for the tool.

Are printed parts good enough to sell?

Yes. Printed parts in PETG, ABS, ASA, TPU and carbon-fiber nylon go into finished products, machines and vehicles every day. Choose the material for the job: ASA for sun and weather, ABS for heat, TPU for flex and carbon-fiber nylon for stiff, load-bearing parts. Our materials page compares them with prices and colors in stock. Every part is checked before packing, and general tolerance is ±0.5% with a lower limit of ±0.5 mm.

Production printing at Pluribus Manufacturing

We run production orders from one part to thousands with no tooling and no minimum order. Up to 100 parts are priced instantly from your file, and larger runs are quoted within one business day with a price per part and a schedule. You approve a real part before every run. Parts are 3D printed in the USA: we print in San Diego, California, and have started setting up a new 5,000 sq ft production facility in Yuma, Arizona, where lower energy costs allow lower prices and faster turnaround. See mass production 3D printing for the full details and a quote form.

Frequently asked questions

Is 3D printing cheaper than injection molding?

At small and medium quantities, yes, because there is no mold to pay for. The total cost of molding only falls below printing once the tooling is spread over thousands of identical parts.

How many parts do I need before a mold pays for itself?

It depends on the part and the mold, but for small plastic parts the crossover is usually in the thousands. Divide the mold price by your quantity to see what tooling adds to each part, then compare that with a printed quote.

What is bridge production?

Bridge production means printing your first production runs so you can sell while a mold is being made, or while you decide whether you need one. It protects your launch date and lets you prove the design with real customers first.

How do I get a quote?

Upload your file on the instant quote page for up to 100 parts, or send the part and quantity through the form on the mass production page for a larger run. You can also call (928) 955-8251.

3D printing vs injection molding: cost, lead time and how to choose (2026)