3D Printing Shop Numbers: What a Part Really Costs, and Which Products Pay
By PlainSight — Insightful Actions · Updated October 2026 · ~6 min read
A print shop rarely runs out of orders first. It runs out of margin, a few cents at a time. Filament is cheap, so the price gets set near the filament, and then the hours the printer ran, the prints that failed, the time spent cleaning up and packing, and the marketplace's cut all come out of what was meant to be profit. The numbers below put a real cost on every part, so you can see which products pay and which ones only keep the printers busy.
Where your numbers live
Your shop's order export (Etsy, Shopify, or your own invoices for custom and business work) as CSV or Excel: one row per order line with the date, the product or job, the channel and the amount. Customer names aren't needed.
Your slicer already tells you the print time and grams of material for every file. Keep those per product in a second sheet; they turn a sales report into a cost-per-part report.
The numbers that decide whether a print pays
1. True cost per part
What good looks like: a written-down cost for every product you sell, worked out before you set its price.
Add the material (grams times what you pay per gram), the printer's time (what the machine cost plus the parts and repairs you expect, spread over the hours you expect it to print, with the electricity it draws), your hands-on minutes at what your time is worth, packaging, and a share for failed prints. The filament is usually the smallest line. A part priced at three times its filament can still lose money once six printer-hours and ten minutes of cleanup are counted.
An example, to show the arithmetic (not a benchmark)
| Cost line | Cable tray |
|---|
| Material (85 g at $22 a kilo) | $1.87 |
|---|
| Printer time (6 hours at $0.40, power included) | $2.40 |
|---|
| Failed prints (8% of material and printer time) | $0.34 |
|---|
| Your time (10 minutes at $30 an hour) | $5.00 |
|---|
| Packaging | $0.90 |
|---|
| Cost per part | $10.51 |
|---|
| Etsy fees on a $24 sale (listing, 6.5%, 3% + $0.25) | $2.73 |
|---|
| Left from a $24 sale | $10.76 |
|---|
2. Failed-print rate
What good looks like: low, steady, and known by printer and by material.
Count the prints that went in the bin against the ones you sold. A failure costs its material and its printer hours, and then the reprint costs them again. A rate that climbs on one machine is a maintenance job; a rate that climbs on one product is a design or settings job. Put the rate into each part's cost rather than pricing as if every print works the first time.
3. Revenue per printer-hour
What good looks like: known for every product, and highest on the products you promote.
Divide what a product sells for, after fees, by the hours it spends on the printer. A printer has about 720 hours in a month, and each one goes to whatever is in the queue. Ranking products this way shows the ones worth the machine's time, and the slow, cheap ones that tie up a printer for a day to earn a few dollars.
4. Fees by channel
What good looks like: every channel's full cut known, and prices set channel by channel.
On Etsy, a US seller pays $0.20 to list an item, a 6.5% transaction fee on the item price plus shipping and gift wrap, and payment processing of 3% plus $0.25, before any advertising. On a $24 sale with shipping included that is $2.73, about 11%. Your own site and direct business orders carry card processing only. Keep the channel in your export and compare what each one leaves you per order, not what it sells.
5. Custom work against catalog products
What good looks like: a catalog that sells without you, and custom work priced for the hours it takes.
Split sales into catalog products (designed once, printed many times) and custom jobs (quoted, modeled, revised). Custom work pays for its design time only if the quote charges for it, so put the modeling hours on the quote, not just the print. Business customers who order replacement parts, fixtures or small batches tend to come back; track the share of revenue from customers who have ordered before.
6. The design rights behind each product
What good looks like: every product made from your own design, or from a license that allows sales where you sell it.
On June 10, 2025 Etsy changed its Creativity Standards: items made with computerized tools such as 3D printers must be produced from the seller's own original design, and the wording that allowed templated designs was removed. A design file bought with a commercial license doesn't meet that rule on Etsy, however legitimate the license. Write down each product's design source next to its sales. A best seller printed from someone else's file is revenue you could lose in a day.
Warning signs worth acting on
- Prices set from the filament cost — the printer time and your own time are the bigger lines.
- A best seller you didn't design, listed on a marketplace that requires your own designs.
- One printer doing most of the failing — a maintenance job that is costing material and hours every week.
- Custom quotes with no line for design time — the modeling is free and the print is the only thing paid for.
- Sales rising while revenue per printer-hour falls — the queue is filling with the products that pay least.
Make it a monthly rhythm
Once a month, export your orders and read each product's sales beside its cost per part and its printer-hours. Reprice or retire the bottom few. Once a quarter, redo the cost per part with what you pay now for filament, power and fees.
Let PlainSight read your order export
Upload your orders and PlainSight breaks sales down by product, channel and customer, shows which products carry the shop and how concentrated it is, and writes the next steps in plain English. Everything runs in your browser — your data never leaves your device.
See it on a live example →
Starting a print shop? Read the free handbook for starting a 3D printing business — the market, the stages ahead, how each kind of work pays, and what to do first. No account needed.
Frequently asked questions
- What file does PlainSight need from a 3D printing shop?
- An order or invoice export with a date, the product or job, and the amount. A channel column (Etsy, website, direct) adds the channel comparison. Print hours and grams per product can sit in your own sheet, and no customer names are needed.
- How do I work out the printer's cost per hour?
- Take what the printer cost, add the parts and repairs you expect over its life, and divide by the hours you expect it to print before you replace it. Add the electricity it draws in an hour at your rate. Recheck it once a year.
- Can I sell prints of designs I downloaded?
- Only where the design's license allows commercial use, and on Etsy not even then: since June 2025 its rules require items made with a 3D printer to come from the seller's own original design. Read each license before you list, and keep a copy.
- Is my data safe if I use PlainSight?
- Yes. Files are processed entirely in your browser and never uploaded. Optional AI features send only anonymized summary totals, never names or raw rows.
Sources
This guide is general information for print-shop owners, not financial, tax, or legal advice. Figures described as “typical” or “common” are survey results and rules of thumb, not standards — always read your own numbers in context.