How do you calculate machine hour rate?

Divide Annual Ownership Cost by Available Hours. Annual Ownership Cost sums depreciation, maintenance, tooling, utilities, and space allocation for the year. Available Hours is shifts times working days times uptime percentage. In the example, $15,000 depreciation plus $8,000 maintenance plus $4,000 utilities equals $27,000, divided by 3,400 available hours, giving $7.94 per machine hour. This is machine cost only; operator labor is added separately.

Should I use calendar hours or available hours in the denominator?

Use available hours, never the 8,760 calendar hours in a year. No machine runs continuously; it stops for shifts not worked, weekends, holidays, breakdowns, and changeovers. Model it as shifts times days times uptime. The example's 2 shifts times 250 days times 85 percent uptime gives 3,400 hours. Using 8,760 would slash the rate to about $3.08 and badly under-recover the machine's real cost across the jobs you quote.

What is a typical machine hour rate for a CNC machine?

It varies widely by machine size and cost. A small mill or lathe like the $150,000 example lands near $8 to $15 per machine hour before labor. Large 5-axis or multi-pallet machines can run $30 to $60 or more. Add the loaded operator rate on top, so a shop rate often reaches $60 to $120 per hour all-in. Build yours from actual ownership costs rather than copying a benchmark.

What costs go into annual ownership cost?

Five buckets: depreciation (purchase price divided by useful life, so $150,000 over 10 years is $15,000/yr), maintenance including spares and service contracts, perishable and durable tooling, utilities such as electricity and compressed air, and a floor-space allocation based on square footage and facility cost per square foot. The example uses $15,000 plus $8,000 plus $4,000 equals $27,000. Omitting tooling or space understates the rate.

Does machine hour rate include the operator's wage?

No. Machine hour rate is equipment cost only: ownership, maintenance, tooling, utilities, and space. The $7.94 in the example excludes labor. To get a loaded shop rate, add the operator's loaded hourly rate, adjusted for how many machines one person tends. If one operator at $42/hr runs two machines, add $21/hr, making the loaded rate about $28.94 per hour for this station.

How do I convert machine hour rate to a per-part cost?

Multiply the machine hour rate by the cycle time expressed in hours. At $7.94 per hour and a 30-second cycle, that is 30/3,600 hours times $7.94, which equals about $0.066 per part. Then add the labor cost per part and material to reach a full piece cost. Keep units consistent: convert seconds to hours by dividing by 3,600 before multiplying by the hourly rate.

Cost and Quoting

Machine Hour Rate Formula

Machine hour rate expresses the total cost of running a machine for one hour including ownership, maintenance, tooling, and utilities. Use it when building a shop rate, pricing a job, or comparing process costs.

Formula

Machine Hour Rate = Annual Ownership Cost / Available Hours

Variables

Annual Ownership Cost: Machine depreciation + maintenance + tooling + utilities + space allocation for the year
Available Hours: Total hours the machine is available to run in the year (shifts x days x uptime)

Understanding the Machine Hour Rate Formula

Machine hour rate answers what it truly costs to keep a machine turning for one hour, before any operator touches it. It rolls depreciation, maintenance, tooling, utilities, and floor-space allocation into a single number you can multiply by cycle time to cost any job on that asset. On the shop floor it separates equipment cost from labor cost, so you can see whether a slow, cheap manual machine actually beats a fast, expensive CNC once ownership is spread across real running hours.

Build Annual Ownership Cost from the books: straight-line depreciation (purchase price divided by useful life), a maintenance budget or trailing actuals, perishable tooling, metered or estimated utilities, and a per-square-foot space charge. Available Hours is the honest denominator: shifts times working days times uptime, not calendar hours. In the example, 2 shifts times 250 days times 85 percent uptime equals 3,400 hours. Keep depreciation on a consistent basis and revisit maintenance yearly as the machine ages and repair costs climb.

The example gives $27,000 divided by 3,400 hours, or $7.94 per machine hour, and that is machine-only. Add the loaded operator rate on top to quote a job. Interpret it against the alternatives: if a newer machine runs the same part in half the cycle at $12/hr, it may still win. A rate that looks too low usually means the denominator is inflated by counting calendar hours. Rising maintenance pushing the rate up is a signal the asset is nearing replacement.

Worked Example

A machine costs $150,000 over 10 years ($15,000/yr depreciation). Annual maintenance is $8,000. Utilities are $4,000/yr. The machine runs 2 shifts x 250 days x 85% uptime = 3,400 available hours.

Annual ownership = $15,000 + $8,000 + $4,000 = $27,000
Machine rate = $27,000 / 3,400 = $7.94/hr

Result: $7.94 per machine hour (add labor on top for loaded rate)

Common Mistake

Dividing by total calendar hours instead of available hours. A machine rated at 8,760 calendar hours per year is not actually running 8,760 hours. Using actual uptime-adjusted hours gives a more accurate rate that reflects real operating cost.

Frequently Asked Questions

How do you calculate machine hour rate?: Divide Annual Ownership Cost by Available Hours. Annual Ownership Cost sums depreciation, maintenance, tooling, utilities, and space allocation for the year. Available Hours is shifts times working days times uptime percentage. In the example, $15,000 depreciation plus $8,000 maintenance plus $4,000 utilities equals $27,000, divided by 3,400 available hours, giving $7.94 per machine hour. This is machine cost only; operator labor is added separately.
Should I use calendar hours or available hours in the denominator?: Use available hours, never the 8,760 calendar hours in a year. No machine runs continuously; it stops for shifts not worked, weekends, holidays, breakdowns, and changeovers. Model it as shifts times days times uptime. The example's 2 shifts times 250 days times 85 percent uptime gives 3,400 hours. Using 8,760 would slash the rate to about $3.08 and badly under-recover the machine's real cost across the jobs you quote.
What is a typical machine hour rate for a CNC machine?: It varies widely by machine size and cost. A small mill or lathe like the $150,000 example lands near $8 to $15 per machine hour before labor. Large 5-axis or multi-pallet machines can run $30 to $60 or more. Add the loaded operator rate on top, so a shop rate often reaches $60 to $120 per hour all-in. Build yours from actual ownership costs rather than copying a benchmark.
What costs go into annual ownership cost?: Five buckets: depreciation (purchase price divided by useful life, so $150,000 over 10 years is $15,000/yr), maintenance including spares and service contracts, perishable and durable tooling, utilities such as electricity and compressed air, and a floor-space allocation based on square footage and facility cost per square foot. The example uses $15,000 plus $8,000 plus $4,000 equals $27,000. Omitting tooling or space understates the rate.
Does machine hour rate include the operator's wage?: No. Machine hour rate is equipment cost only: ownership, maintenance, tooling, utilities, and space. The $7.94 in the example excludes labor. To get a loaded shop rate, add the operator's loaded hourly rate, adjusted for how many machines one person tends. If one operator at $42/hr runs two machines, add $21/hr, making the loaded rate about $28.94 per hour for this station.
How do I convert machine hour rate to a per-part cost?: Multiply the machine hour rate by the cycle time expressed in hours. At $7.94 per hour and a 30-second cycle, that is 30/3,600 hours times $7.94, which equals about $0.066 per part. Then add the labor cost per part and material to reach a full piece cost. Keep units consistent: convert seconds to hours by dividing by 3,600 before multiplying by the hourly rate.