Automation Cost

Robotic Workcell Cost Per Part: How to Quote Automation

How to turn a robot cell's capital, labor, energy, and scrap into a defensible cost per part and a quote that survives scrutiny.

Cost per part in a robot cell is dominated by amortized capital, not touch labor, which reverses the intuition estimators bring from manual lines. A turnkey single-arm pick-and-place cell runs 180,000 to 320,000 dollars installed: robot 45,000 to 90,000, end-of-arm tooling 8,000 to 40,000, safety and guarding 15,000 to 35,000, controls and integration 60,000 to 120,000, plus fixtures and vision. Spread over a 5 year life and 3.47 million parts a year, a 250,000 dollar cell adds about 0.0144 dollars per part in straight-line depreciation. That capital line, not the operator, is usually your largest single driver.

Machine time is the honest denominator, so quote against effective throughput, never nameplate. If the Robot Cell Throughput math gives 963 good parts per hour rather than the theoretical 1,058, your per-part capital and overhead recovery is 10 percent higher than a nameplate quote assumes. Convert the cell's fully burdened hourly cost, say 38 dollars an hour covering depreciation, floor space, and support, into cost per part by dividing by good parts per hour: 38 divided by 963 is 0.0395 dollars. Bids that divide by theoretical rate underprice by that same 10 percent and erode margin all year.

Labor does not vanish with automation, it shifts. One operator now tends 3 to 6 cells instead of one station, so allocate a fraction of a loaded wage. At 32 dollars per hour loaded, an operator covering 4 cells charges 8 dollars per cell-hour, which at 963 parts is 0.0083 dollars per part. Add skilled support: a robotics technician at 55 dollars per hour for 4 hours a week across 6 cells adds roughly 220 dollars weekly, near 0.0006 dollars per part. Underestimating support labor is common; new cells often need 6 to 10 technician hours weekly in the first quarter before settling.

Energy and consumables are small but real, and buyers respect a quote that names them. A 20 kg robot draws 2 to 5 kW under load; at 3 kW average and 0.12 dollars per kWh that is 0.36 dollars per hour, about 0.0004 dollars per part. Pneumatic grippers hide cost: compressed air at roughly 0.25 dollars per 1,000 standard cubic feet, with a vacuum cup cycle pulling meaningful flow, can reach 0.001 to 0.003 dollars per part on high-cycle cells. The Pneumatic Gripper Air Cost and EOAT Cost Per Part calculators size these so they are not buried in an overhead lump.

Scrap is where automation quotes swing most, in both directions. A robot holds tighter placement repeatability, so scrap may fall from a manual 1.5 percent to 0.3 percent, and on a 4 dollar part that recovered 1.2 percent is 0.048 dollars saved per part, often larger than the entire labor line. Quote the improvement with the Robot Scrap Savings calculator using measured before-and-after rates, not hope. But new cells run high scrap during ramp, sometimes 3 to 5 percent for the first few weeks, so a first-year quote should carry a blended scrap number, not the eventual steady-state figure.

Changeover cost belongs in the per-part number whenever the cell runs mixed products. A changeover that idles the cell 25 minutes at 38 dollars per hour burns 15.83 dollars in lost machine time, plus 20 minutes of technician time near 18 dollars, so 34 dollars per changeover. Across a 3,000 part batch that is 0.011 dollars per part; across a 300 part batch it balloons to 0.113 dollars per part, ten times higher. The Robot Changeover Cost calculator makes batch size the visible lever, which is exactly the conversation to have with a customer chasing small lots.

Overhead and margin turn cost into price without hand-waving. Sum the drivers: 0.0144 capital, 0.0395 machine burden already covers some of this so avoid double counting, plus labor 0.0089, energy and air 0.0034, and net scrap. A clean method is to build fully burdened cell-hour cost first, divide once by good parts per hour, then add material and any per-part tooling wear separately. Apply overhead at your plant rate, often 12 to 20 percent of conversion cost, then margin. Stating each line lets a buyer challenge one number without reopening the whole quote.

Estimates go wrong in predictable places, so guard them. The three biggest errors are quoting nameplate throughput instead of effective, assuming steady-state scrap on a first-year job, and forgetting integration cost, which routinely equals or exceeds the robot itself. A useful check: capital plus integration should land near 2 to 3 times the bare robot price, and if your quote shows the robot as more than half the cell cost, you have missed guarding, controls, or fixtures. Validate payback separately with the Automation ROI and Automation Payback calculators before committing to a price.

Published 2026-07-01.