Published by
Throne of Profit EditorialReviewed by
William Hassell
Founder & Chief Editor, Throne of Profit
Ask most small-shop owners what an hour on the CNC costs, and you'll get a number that came from somewhere they can't quite name — a rate the old owner used, a figure a competitor mentioned, a round number that "feels about right." It quotes fine on easy jobs and quietly loses money on the hard ones, and nobody can say why. A machine-hour rate isn't a number you pick; it's a number you calculate — what one hour on that specific machine must earn to cover its share of everything it takes to keep the doors open.
This matters more in a shop than almost anywhere else because your machines are not interchangeable. A manual bench and a five-axis mill don't cost the same to own, power, maintain, or tool — so an hour on each shouldn't earn the same. When every machine carries one blended shop rate, the cheap equipment overcharges and the expensive equipment undercharges, and your quoting is wrong in both directions at once.
WHAT ONE MACHINE-HOUR MUST EARN
machine's yearly costs productive hours
┌────────────────────┐ ┌──────────────┐
│ depreciation │ │ 2,080 paid │
│ floor space + power │ ÷ │ − downtime │ = $/hour
│ maintenance + tools │ │ − setup gap │ this machine
│ share of overhead │ │ = billable │ must earn
└────────────────────┘ └──────────────┘Owner symptoms
You quote from a single shop rate, even though your machines cost wildly different amounts to run.
Some jobs feel profitable and some feel tight, but you can't point to which machine is the reason.
When a customer pushes back on a price, you can't break down where the number came from.
Why this happens
Machine-hour rates get skipped because they feel like accounting, and the shop floor is where the owner's attention lives. A blended rate is easy — one number, applied to everything — and usually inherited rather than built. The trouble is that a blend hides which machine is carrying its weight. Expensive, low-utilization equipment quietly eats margin while a cheap workhorse subsidizes it, and because both hide inside one average, the owner never sees the transfer happening.
Common mistakes
Using one blended rate across machines that cost very different amounts to run.
Dividing by all 2,080 hours as if every paid hour is billable, ignoring downtime and setup.
Leaving out tooling and maintenance, which hit some machines far harder than others.
Forgetting overhead — rent, insurance, admin — so the rate covers the machine but not the building around it.
Setting it once and never revisiting as utilization, energy, and tooling costs shift.
Business consequences
A rate that's too low turns your busiest machine into your biggest loss center — every hour it runs, you fall further behind, and volume makes it worse, not better. A rate that's too high loses the quotable work to shops that priced it right. Either way, you're steering with a broken gauge. The owner who calculates a real per-machine rate can look at two jobs, see which one actually pays for the equipment it ties up, and walk away from the one that doesn't without guessing — pricing becomes a decision you can defend to a customer's face.
How experienced operators think about it
They treat each machine as a small business that has to pay for itself. The question is plain: what does this machine cost me for a year — to own it, power it, tool it, maintain it, and shelter it — and how many hours will it actually be earning money, not just switched on? Costs over billable hours gives the floor: the rate below which running the machine loses money. Everything above that floor is where margin lives. They also keep the cost of an hour and the price of an hour separate, because confusing the two is how a shop convinces itself a losing job is a winner.
Practical actions
List each machine's yearly ownership cost — purchase or lease spread over its useful life, plus financing. This is the piece a blended rate erases.
Add the running costs it actually incurs — power draw, tooling and consumables, maintenance and expected repairs. Heavy machines carry heavy numbers here.
Assign it a fair share of overhead — floor space, insurance, admin — so the rate covers the shop, not just the spindle.
Divide by billable hours, not paid hours. Start from working hours, then subtract realistic downtime, setup, and idle time to get the hours the machine truly earns.
Compare the result to what you charge now, and re-run it yearly or after any big change in utilization, energy, or equipment.
Questions every owner should ask
If I priced every job at my current rate, would my most expensive machine actually pay for itself?
How many hours a year is each machine truly billable — not just powered on?
When a customer challenges a quote, can I break the number down by what the machine costs to run?
Frequently asked questions
Do I really need a different rate for every machine, or is one shop rate close enough?
One rate is close enough only if your machines are genuinely similar in cost to own and run — which is rare. The moment you have a mix of cheap manual equipment and expensive automated machines, a blended rate overcharges the cheap work and undercharges the expensive work. You don't need a rate for every hand tool; you need separate rates for the machines that differ meaningfully in cost. Group similar machines to keep the math manageable.
What billable-hours number should I divide by?
Not 2,080 — that's paid time, not earning time. Start from the hours the machine is scheduled to work, then subtract the reality: setup between jobs, maintenance windows, breakdowns, and stretches with no work queued. A machine that's "always running" is often billable only 60 to 75 percent of its available hours, and dividing by an honest number is what separates a rate you can defend from one that only looks good on paper.
Related articles
Running a Profitable Small or Midsize Manufacturing Business — the pillar.
Raising Prices on Long-Standing Manufacturing Customers — moving rates without losing accounts.
Passing Material Price Swings Through to Your Prices — the other half of a defensible quote.
What Does a Job Actually Cost You? Real Job Costing — the universal costing method.
Am I Charging Enough? How to Know for Sure — knowing your price is right.
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