3D Printer: Buy vs Outsource Calculator

Finance

Deciding whether to buy a 3D printer or pay a service to print your parts comes down to volume. This calculator compares the total cost of owning a printer — its upfront price plus a per-part material cost — against outsourcing every part at a higher per-unit price. It shows the total each way, your saving from buying, and the break-even quantity where buying starts to pay off.

Formula

Buy Total = Fixed Cost + (Buy Cost per Unit × Units); Outsource Total = Outsource Cost per Unit × Units
  • Buy total = printer fixed cost + (in-house cost per part × parts needed).
  • Outsource total = outsourced cost per part × parts needed.
  • Saving from buying = outsource total − buy total; a positive number means owning is cheaper at that volume.
  • Break-even parts = fixed cost ÷ (outsource cost per part − in-house cost per part), the quantity where the two options cost the same.
  • The model ignores the printer's running costs beyond materials — electricity, failures, maintenance and your time — so the real break-even is a little higher.

Example Calculation

Inputs
  • Buy Option Fixed Cost (PKR): 300000
  • Buy Option Cost per Unit (PKR): 450
  • Outsource Cost per Unit (PKR): 900
  • Units Needed: 1000

A printer costs 300,000 plus 450 per part, while outsourcing costs 900 per part. For 1,000 parts, buying totals 300,000 + 450,000 = 750,000 versus 900,000 outsourced — a saving of 150,000. The break-even is 300,000 ÷ (900 − 450) ≈ 667 parts, so above ~667 parts owning a printer is cheaper.

Frequently asked questions

When is buying a 3D printer worth it?
Once you need more parts than the break-even quantity. Below it, the printer's upfront cost outweighs the per-part saving and outsourcing is cheaper.
What is the break-even quantity?
It is the number of parts at which buying and outsourcing cost the same. It equals the printer's fixed cost divided by the per-part saving from printing in-house.
What costs am I missing?
This compares purchase price and material cost only. Real ownership also includes electricity, failed prints, maintenance, post-processing and your own labour.
Why is the in-house cost per part lower?
Once you own the printer, each part costs mainly filament or resin, whereas an outsourcing service builds in their machine, labour and profit margin.
Can I use this for other buy-vs-outsource decisions?
Yes. Any choice with a fixed upfront cost plus a low per-unit cost versus a higher per-unit cost with no upfront outlay follows the same break-even logic.