How to price a 3D print: the costs every maker forgets

The most common way to lose money selling 3D prints is to price by gut: weigh the filament, double it, call it a day. That number feels safe and is almost always too low, because filament is the smallest real cost in the job. The machine time, the power, the wear on the printer, the prints that fail at hour nine, and your own labor are all invisible in a "filament times two" estimate — and they're where the money actually goes.

Here's the full cost stack, in the order it bites, and how to turn it into a price that survives contact with a tax return.

The five costs that make up a print

1. Material — the obvious one

Start with cost per gram, not cost per spool. A $25 spool holding 1,000 g costs 2.5 cents per gram. A 60 g model is therefore $1.50 in raw plastic. Simple — and the only number most sellers ever calculate.

Don't forget the parts of the material you paid for but didn't sell: purge towers, brims, rafts, and supports all consume filament that ends up in the bin. For a heavily-supported model, add 10–20% to the model weight to cover them.

2. Electricity — small per print, real per month

A typical FDM printer draws 100–150 watts while running (mostly the heated bed). Multiply wattage by print hours to get watt-hours, divide by 1,000 for kilowatt-hours, and multiply by your electricity rate.

A 10-hour print at 120 W is 1.2 kWh. At $0.16/kWh that's about 19 cents. Trivial on one print — but a busy printer running 200 hours a month is pulling real money off your meter, and it scales with every job. It belongs in the price.

3. Machine wear — the cost nobody invoices for

Your printer is a consumable. Nozzles clog, belts stretch, hotends fail, bearings wear, build plates lose their grip. A reasonable way to capture this is depreciation per hour: take the printer's price plus expected maintenance over its life, divide by the hours you expect to get out of it.

A $400 printer you expect to run for 4,000 productive hours costs 10 cents an hour in wear before any repairs. Add a maintenance allowance and 15–20 cents per hour is realistic. Skip this and you'll be "profitable" right up until the hotend dies and the replacement eats a month of margin.

4. Failure rate — you pay for the prints that don't sell

Prints fail. Spaghetti at hour nine, a warped corner, a bed-adhesion release. Even a dialed-in machine loses some percentage of jobs, and a failed print has consumed material, power, and wear with nothing to sell at the end.

The fix is a failure buffer: if 1 in 10 prints fails, divide your production cost by 0.9 (a roughly 11% uplift) so the nine good prints cover the tenth. Sellers who ignore this are quietly subsidizing every failure out of their own pocket.

5. Labor — the cost makers refuse to charge for

This is the big one, and the one hobbyists-turned-sellers chronically zero out. Labor is not just watching the print. It's slicing and prepping the file, loading and leveling, removing supports, sanding, gluing multi-part models, priming and painting, and packing for shipping. That can easily be 20–40 minutes of hands-on work on a model that printed "by itself" overnight.

Pay yourself an hourly rate and put the prep-and-finish time into the cost. If you don't, you've built a job that pays for plastic and electricity but not for you — which is a hobby with extra paperwork, not a business.

From cost to price

Add the five together and you have your production cost — what one sellable unit truly costs you. Price is a separate decision on top of that:

• Wholesale / bulk: cost × 1.5–2. Thin margin, high volume, you're competing on price.
• Standard retail (Etsy, craft fair): cost × 2.5–3. The usual handmade-goods markup; leaves room for fees and the occasional discount.
• Premium / bespoke: cost × 3–4+. Custom work, original design, painted finishes — you're charging for skill and originality, not plastic.

Then sanity-check against your marketplace. If the math says $34 and comparable listings sit at $22, the answer usually isn't "drop the price." It's "find a faster print, a cheaper material, a less support-heavy model, or a market that values the design" — because selling at $22 when you cost $17 to make is a part-time job paying a few dollars an hour.

Don't forget the platform's cut

Marketplace fees come off the top of the sale price, not your cost, so they compound. Etsy alone takes a listing fee, a transaction fee, and a payment-processing fee that together land around 9–11% before any ads. If you priced to a 2.5× markup and then hand 10% back to the platform, your real margin is meaningfully thinner than the spreadsheet promised. Price as if the fee is a cost, because it is.

Run the numbers instead of guessing

Doing this by hand for every model is tedious, which is exactly why most sellers skip it and default to "filament times two." Our 3D print pricing calculator takes spool cost, model weight, print hours, wattage, electricity rate, a failure buffer, labor, and markup, and returns the raw production cost, electricity overhead, wear allowance, and a tiered retail price — so you can see exactly which cost is eating your margin. If you also cut on a laser, the laser cutter pricing calculator applies the same logic to sheet material and machine time.

The discipline is simple: count every cost, not just the visible one. Filament is the cheap part. The printer, the power, the failures, and your time are the job — and a price that ignores them isn't a low price, it's a loss you haven't noticed yet.