A print farm’s real hourly rate is its total cost divided by the hours that produce good parts, not by the hours in the year. Work out the fixed cost of each printer, divide by the hours it actually prints, adjust for failed prints, then add the labour to clear and restart each plate and a share of overhead. Utilisation and labour per plate move the result far more than the printer’s purchase price does.
Key points
- Fixed printer costs are divided by printing hours, so utilisation sets the machine cost per hour.
- Failed prints are paid for by the good ones: divide by your success rate.
- Labour per plate is often the largest cost per hour on short jobs.
- Overhead belongs in the rate as an amount per good hour, not as a guess on top.
- Price short jobs with a per-plate charge or a minimum, and push long jobs onto shared plates.
- Measure your own utilisation, failure rate and minutes per plate before trusting any rate.
What goes into a print farm’s hourly rate?
A print farm is a set of similar printers run as one production unit, usually FDM. The cost per hour is built from five pieces:
| Component | What it includes | How it scales |
|---|---|---|
| Fixed printer cost | Depreciation, maintenance, spare parts, floor space and utilities share | Per printer per year, divided by printing hours |
| Energy | Power drawn while printing | Per printing hour |
| Failures | Machine, labour and material of plates that fail | Divide by the success rate |
| Labour | Clearing plates, checking parts, starting the next job | Per plate, so per hour depends on plate length |
| Overhead | Rent beyond the print room, software, admin, packing, sales | Per farm per year, shared over good hours |
This is the same structure as any machine-hour rate, described in full in our guide to the machine-hour rate. What is special about farms is that the printers are cheap, so the other four pieces dominate.
How does utilisation change the rate?
Utilisation is the share of hours a printer actually prints. Few farms run printers anywhere near 100 % of the year: nights and weekends when nobody clears plates, maintenance, waiting for work, colour changes and failed starts all cut into it. A plate that finishes at 2 a.m. and waits until 8 a.m. to be cleared adds six idle hours.
Because the fixed costs are the same whatever the utilisation, the cost per printing hour falls as the printers get busier. Using the example costs from the worked example below (€940 fixed per printer per year, €1,500 overhead share, an 8 % failure rate):
| Utilisation | Printing hours a year | Machine cost per good hour | Overhead per good hour | Total before labour |
|---|---|---|---|---|
| 30 % | 2,628 | €0.43 | €0.62 | €1.05 |
| 55 % | 4,818 | €0.25 | €0.34 | €0.59 |
| 75 % | 6,570 | €0.19 | €0.25 | €0.44 |
Moving from 30 % to 55 % utilisation nearly halves the cost per hour before labour. That is why capacity planning, keeping plates full and printers queued, is worth as much as tuning the rate itself.
How should you account for failed prints?
Every farm has failures: spaghetti, warped corners, layer shifts, clogged nozzles, a first layer that did not stick. The machine time, filament and labour of a failed plate are real costs, and they have to be paid by the plates that succeed.
The clean way to include them is to divide by the success rate. If 8 % of plates fail, 92 % succeed, and every good hour carries 1 ÷ 0.92, about 1.087 times its direct cost. Count failures honestly over a few months, including partial failures that need a reprint of some parts. Many farms find the number is higher than they assumed, and it varies by material: flexible and engineering filaments usually fail more often than PLA.
Apply the allowance once. If it is in the hourly rate, do not add a separate failure line to each quote.
Why is labour per plate so important?
Every plate needs the same handful of minutes: remove the parts, check them, clean or swap the plate, load the next job, confirm the first layer. That time is the same whether the plate ran for one hour or twelve. Spread over the plate’s hours, it becomes the biggest cost of short jobs.
With 12 minutes per plate at €30.00/h, a plate costs €6.00 of labour. At 55 % utilisation, with machine and overhead at €0.59 per good hour:
| Plate length | Labour per good hour (€6.00 ÷ hours ÷ 0.92) | Real cost per good hour |
|---|---|---|
| 1 h | €6.52 | €7.11 |
| 3 h | €2.17 | €2.76 |
| 6 h | €1.09 | €1.68 |
| 12 h | €0.54 | €1.13 |
A one-hour plate costs over six times as much per hour as a twelve-hour one. A flat hourly price will lose money on short jobs and overcharge long ones. Three fixes, which work well together:
- A per-plate or per-job charge that covers handling, shown as its own line.
- A minimum order value, so a tiny job pays for the plate it occupies.
- Batching: hold small jobs and print them together on longer plates, and quote a longer lead time for that price.
Automation that ejects plates or swaps them without a person, where it works reliably, attacks this cost directly.
Parts per plate matter too. If a plate holds eight copies of a part, the €6.00 of handling becomes €0.75 a part, plus a minute or two each for checking and bagging. A quote for a quantity of small parts should therefore count plates, not parts: work out how many fit on one plate with the spacing your printers need, how many plates the order takes, and charge the per-plate labour per plate. The same quantity on a printer with a larger bed can be noticeably cheaper.
A worked example: the real hourly rate of one printer
Worked example: one FDM printer in a farm, at 55 % utilisation (example figures)
| Line | Calculation | Amount |
|---|---|---|
| Depreciation | €1,200 printer over 3 years | €400 a year |
| Maintenance and spares | Nozzles, belts, plates, fans | €300 a year |
| Floor space and utilities share | €240 a year | |
| Fixed cost | €400 + €300 + €240 | €940 a year |
| Printing hours | 8,760 h × 55 % | 4,818 h |
| Fixed cost per printing hour | €940 ÷ 4,818 h | €0.195 |
| Energy | 0.12 kW average × €0.30/kWh | €0.036 |
| Machine cost per printing hour | €0.195 + €0.036 | €0.231 |
| Machine cost per good hour | €0.231 ÷ 0.92 | €0.251 |
| Overhead share | €1,500 ÷ (4,818 h × 0.92 = 4,433 good hours) | €0.338 |
| Labour per good hour | €6.00 per plate ÷ 6 h average plate ÷ 0.92 | €1.087 |
| Real cost per good hour | €0.251 + €0.338 + €1.087 | €1.68 |
Two things stand out. The printer itself, depreciation included, is about €0.25 of the €1.68. Labour is about two thirds of it. A farm that prices from the printer’s cost alone will be badly short; one that prices from labour per plate and utilisation will be close.
Material is on top, charged per job by mass with its own waste allowance and divided by the same 0.92 for failures. Margin is on top of everything.
How do you turn the rate into a price?
- Estimate print time properly. The hourly rate is only as good as the hours it is multiplied by; see FDM print time estimation for why volume is not enough.
- Charge machine and overhead per good hour, from your own utilisation.
- Charge labour per plate, shared between the parts on the plate.
- Add material by mass, with waste and the failure allowance.
- Add margin once, at the end, and apply a minimum.
The full line-by-line method is in how to calculate 3D printing cost, and if you are spreading rent, admin and software across machines, overhead is treated in more depth in overhead allocation for job shops. To run the rate arithmetic on your own figures, the machine-hour rate calculator takes the inputs above.
What to measure first
If you change only one habit, log three numbers for a month: hours each printer actually printed, plates that failed, and minutes spent per plate. Those three numbers set most of your real hourly rate, and most farms have never measured them.
Quotometry prices FDM from the printers, speeds, labour per plate and utilisation cap a farm configures, and packs parts onto shared plates when the shop allows it. The print farms page shows how farms use it.
Questions people ask
What hourly rate should a print farm charge?
There is no single right figure, because it depends on what your printers cost, how busy they are, your failure rate, your labour per plate and your overhead. Work out your real cost per good printing hour from those, then add margin. A farm that charges a rate it read online, without this arithmetic, may be selling below cost on short jobs and above the market on long ones.
How does utilisation change the hourly rate?
The fixed costs of a printer, such as depreciation, maintenance and floor space, are paid whether it prints or not. Divide them by fewer printing hours and each hour costs more. Going from 30 % to 55 % utilisation in the worked example nearly halves the machine and overhead cost per hour. That is why capacity planning matters as much as the rate itself.
Why does labour per plate matter so much for a print farm?
Every plate needs someone to clear it, check it and start the next one, whatever its length. On a twelve-hour plate that time is a small cost per hour. On a one-hour plate it can be several times the machine cost. Short jobs need either a per-plate charge, a minimum order value, or batching onto longer plates.
How should failed prints be included in the price?
Measure the share of plates that fail or need reprinting, then divide machine, labour and material costs by the share that succeed. If 8 % of plates fail, every good hour carries the cost of the bad ones, so divide by 0.92. Do not add the allowance again elsewhere, or you will double count it.
Quotometry prices every part from your own machines and rates, on your website, in seconds.