Vision Cost

Machine Vision Inspection Cost Estimation: What Drives Cost Per Part and How to Quote It

A money-first breakdown of what a vision inspection cell actually costs per part, from data labeling labor to the hidden cost of false rejects.

Cost per inspected part is the number a buyer signs against, and it is dominated by amortized capital, not runtime. A single-camera station typically runs 25,000 to 90,000 dollars installed: 4,000 to 15,000 for the camera and lens, 1,500 to 8,000 for lighting, 3,000 to 12,000 for a GPU inference box, and the rest in mounting, enclosure, PLC integration, and commissioning labor. Amortize 60,000 dollars over 3 years and 15 million parts and capital contributes 0.004 dollars per part before you count a single hour of labor.

Data labeling is the labor line estimators forget, and it can rival the hardware. A pilot needing 40,000 labeled images at 20 seconds per region and 3 regions per image is roughly 667 hours. In-house at a loaded 35 dollars per hour that is 23,000 dollars; outsourced segmentation runs 0.05 to 0.50 dollars per region, so 120,000 regions costs 6,000 to 60,000 dollars. Use the Annotation Workload calculator to convert image counts into hours before you quote, because guessing here routinely blows the estimate by 30 to 50 percent.

False reject cost is the largest recurring cost most quotes ignore. Every good part scrapped by an oversensitive model carries full accumulated value, not just material. At a 1.5 percent false reject rate on 100,000 parts worth 12 dollars each, that is 1500 parts times 12, or 18,000 dollars of good product destroyed. The False Reject Cost calculator multiplies false reject rate by throughput by part value, and a half-point of tuning from 1.5 to 1.0 percent recovers 6,000 dollars on that volume alone.

False accept cost sits on the other side of the tradeoff and is harder to bound. An escaped defect that reaches a customer carries warranty, return freight, and recall exposure that can be 10 to 100 times the part value. At a 6 percent escape rate on a 2 percent defect population across 100,000 parts, 120 defective parts ship. If each field failure costs 400 dollars in warranty and handling, that is 48,000 dollars. The False Accept Cost calculator forces you to price this explicitly so the reject threshold is a business decision, not a default.

Labor shifts from inspection to supervision, and the quote should show the swap. Manual visual inspection typically costs 0.02 to 0.15 dollars per part depending on cycle and wage. A vision cell removes most of that but adds a technician managing false rejects and retraining, often 0.1 to 0.3 full-time equivalents per line at 50,000 to 80,000 dollars loaded. On a 5 million part per year line, 0.2 FTE at 65,000 dollars is 13,000 dollars, or 0.0026 dollars per part, which still beats manual inspection but is real money.

Build the quote as a stack, not a single markup. Sum amortized capital per part, labeling amortized over model life, per-part inference compute, technician labor, false reject scrap, and false accept exposure, then apply overhead and margin. A representative stack: 0.004 capital, 0.003 labeling, 0.001 compute, 0.003 labor, 0.006 false reject, 0.010 false accept, totaling 0.027 dollars per part before overhead. Add 20 percent overhead and 25 percent margin and you quote roughly 0.041 dollars per part, defensible line by line.

Estimates go wrong in predictable places, and each has a number. Teams quote the camera and forget lighting, which is 15 to 25 percent of hardware and drives detection rate. They budget one round of labeling and hit two or three retraining cycles as new defects appear, doubling the 23,000 dollar labeling line. They price false reject at material cost when the part is nearly finished, understating scrap by 5 to 10 times. Run Machine Vision ROI and Inspection Automation Payback with these corrected inputs before committing.

Payback ties the money together and sets the go decision. Inspection Automation Payback equals net installed cost divided by annual savings from reduced escapes, reduced manual labor, and reduced scrap. A 60,000 dollar cell saving 40,000 dollars from labor plus 25,000 dollars from fewer escaped defects minus 18,000 dollars of new false reject scrap nets 47,000 dollars per year, a 1.3 year payback. If your calculated payback exceeds 2.5 years, the false reject line is usually the culprit, and tuning the threshold beats buying more hardware.

Published 2026-07-01.