What's the biggest hidden cost people miss?

Their own time. If you spend 10 minutes setting up a print and 5 minutes cleaning up after it, and you value your time at even $15/hour, that's $3.75 per print before any material cost. For small prints, your time can cost more than the filament.

Is 3D printing cheaper than buying the same thing on Amazon?

Almost always no, for anything mass-produced. A plastic phone case on Amazon is $10 including shipping. Printing one yourself runs $5 to $15 when you count everything honestly. The win is custom parts, parts nobody sells, or parts you can iterate on quickly. It's rarely about saving money.

Does infill percentage change the cost much?

Yes, linearly with material. 20% infill uses roughly half the filament of 40% infill on the same model. For most display parts, 10 to 15% is fine. Functional parts that need to hold weight can justify 30 to 50%.

What about multi-color prints?

Multi-color adds a surprising amount. Bambu's AMS purges 5 to 15 grams of filament per color swap, and prints with dozens of swaps can easily waste half the filament on purge. For a two-color phone case with 40 swaps, you might use 30g on the part and another 200g on purge. The dedicated AMS waste calculator handles this specifically.

How do I price a print I'm selling on Etsy?

A rough formula that works: (filament cost + electricity) x 3 + your time at a fair hourly rate. The 3x multiplier covers printer wear, failure amortization, post-processing supplies, and a small margin. Then compare to what similar items sell for and adjust. If your number is way above market, your cost structure is off.

How much does it really cost to 3D print? Full breakdown for 2026

Most 3D printing cost estimates you find online are either wrong or incomplete. Manufacturer marketing talks about "prints for pennies." Doom-posters on Reddit lump in printer wear at $5 per print. The actual number, for most hobbyist prints, sits in between, and it's made up of five things most people ignore at least one of.

I print on a Bambu P1S almost daily, and I've done the math enough times to have a stable picture of what a real print costs. This breakdown walks through each component, with the small numbers that add up, so you can stop guessing.

The five costs that matter

Filament
Electricity
Failure waste (prints that don't complete)
Printer wear and amortization
Your time

1. Filament (the biggest cost, easy to calculate)

Filament is sold by the kilogram. Prints use grams. The math: convert grams to kg, multiply by price per kg, add a small waste factor for priming and skirts.

cost = (grams / 1000) × price_per_kg × (1 + waste_factor)

Concrete example: a 3DBenchy at standard settings uses about 20 grams of PLA. At $20 per kg with 5% waste, that's $0.42. An articulated dragon print at 300g on the same filament is $6.30. The Filament Cost Calculator handles this across the main material types.

One caveat that catches people: multi-color prints waste filament on AMS purge. A two-color print with 40 color swaps at 8 grams per swap adds 320 grams of purge on top of the actual part weight. That's often more filament than the print itself.

2. Electricity (almost nothing, most people get this wrong)

Hobbyists consistently overestimate electricity cost. A Bambu X1C averages around 115 watts during a print. At the US average electricity rate of $0.18 per kWh, a 12-hour print costs about 25 cents. An Ender 3 at the same duration runs a bit higher because it's less efficient, roughly 27 cents.

Electricity is small enough that it almost never changes a purchase decision. The Electricity Cost Calculator covers the full range of printer classes and regional rates.

3. Failure waste (small per print, real over time)

Even with a well-tuned printer, you'll lose prints. Community consensus for hobbyist failure rates sits around 5 to 10%. When something fails mid-print, the filament is gone, the time is gone, and you still paid the electricity.

To amortize this across your print cost, figure out what fraction of prints fail and scale up all other costs by that fraction. A 10% failure rate means every successful print is effectively carrying about 11% extra cost (since you need ~1.11 attempts on average). The Failure Rate Calculator tracks this and compares to benchmark bands.

4. Printer wear (the controversial one)

This is where arguments happen on forums. Some people treat it as free (paid for the printer already, so ongoing cost is zero). Others amortize aggressively (full printer cost spread over expected lifetime hours).

The honest middle ground: a $700 Bambu P1S used for roughly 2000 hours before major parts need replacement amortizes to about $0.35 per hour of print time. An 8-hour print carries about $2.80 of wear cost by this math. This covers typical wear parts: nozzles, hotends, belts, beds. Include it if you're pricing work for sale. Ignore it if you're printing for yourself and the printer is already paid off.

5. Your time (the cost people really miss)

Every print takes some human time even if the printer runs unattended. Roughly 5 minutes to slice and send a file, another 5 to 10 minutes to remove the print, clean the plate, and check the nozzle. If you value your time at $15 per hour, that's $1.25 to $2.50 per print in setup and cleanup alone.

For prints you're selling, this needs to be in your price. For prints for yourself, call it a hobby cost. Either way, it's real.

Worked example: a 100g phone case

Standard PLA, 8-hour print on a Bambu P1S:

Filament: $2.10 (100g × $20/kg × 1.05 waste)
Electricity: $0.14 (95W × 8h at $0.18/kWh)
Failure waste amortized: $0.25 (7% typical failure rate)
Printer wear: $2.80 (8h × $0.35/h)
Your time: $3.75 (15 min at $15/h)
Total: about $9.05

If you're selling that phone case on Etsy, your price needs to clear $15 to $20 for it to be worth making. Below that and you're essentially subsidizing buyers with your time.

If it's a case for yourself and you already own the printer? The honest out-of-pocket cost is closer to $2.50 (just filament and electricity). Everything else is sunk.

Frequently asked

What's the biggest hidden cost people miss?: Their own time. If you spend 10 minutes setting up a print and 5 minutes cleaning up after it, and you value your time at even $15/hour, that's $3.75 per print before any material cost. For small prints, your time can cost more than the filament.
Is 3D printing cheaper than buying the same thing on Amazon?: Almost always no, for anything mass-produced. A plastic phone case on Amazon is $10 including shipping. Printing one yourself runs $5 to $15 when you count everything honestly. The win is custom parts, parts nobody sells, or parts you can iterate on quickly. It's rarely about saving money.
Does infill percentage change the cost much?: Yes, linearly with material. 20% infill uses roughly half the filament of 40% infill on the same model. For most display parts, 10 to 15% is fine. Functional parts that need to hold weight can justify 30 to 50%.
What about multi-color prints?: Multi-color adds a surprising amount. Bambu's AMS purges 5 to 15 grams of filament per color swap, and prints with dozens of swaps can easily waste half the filament on purge. For a two-color phone case with 40 swaps, you might use 30g on the part and another 200g on purge. The dedicated AMS waste calculator handles this specifically.
How do I price a print I'm selling on Etsy?: A rough formula that works: (filament cost + electricity) x 3 + your time at a fair hourly rate. The 3x multiplier covers printer wear, failure amortization, post-processing supplies, and a small margin. Then compare to what similar items sell for and adjust. If your number is way above market, your cost structure is off.