How to Calculate Machine Hour Rate (Formula, Example and Template)

Cost Engineering · Reading time: about 10 minutes

A machine hour rate is the cost of running one machine for one productive hour. It’s the number you multiply by cycle time to get the machining, cutting or forming cost of a part. Get it wrong and every cost estimate built on it is wrong too.

This guide shows how to calculate machine hour rate step by step for CNC, laser and press machines. It includes a worked example comparing a 3-axis and a 5-axis CNC, and shows why utilisation matters more than any other input. It’s also the rate behind the cutting and bending costs in our sheet metal cost estimation guide.

What a Machine Hour Rate Is

A machine hour rate (MHR) spreads all the annual costs of owning and running a machine over the hours it actually produces parts. The result is one number in dollars per hour.

Shops use it because a single “shop rate” hides real differences. A $300,000 five-axis machine costs far more per hour than a $60,000 manual mill, and your estimates should show that.

Components: Depreciation, Finance, Power, Maintenance, Tooling, Floor Space

Most machine hour rates are built from the same cost blocks:

• Depreciation: the machine’s purchase price, less residual value, spread over its useful life.
• Finance cost: the cost of capital tied up in the machine (interest, or the return you’d earn elsewhere).
• Power: electricity for the spindle, axes, coolant, hydraulics and controls.
• Maintenance: scheduled service, repairs and spare parts, often 3 to 7 percent of purchase price per year.
• Tooling and consumables: cutting tools, inserts, coolant, assist gas, lubricants.
• Floor space: the share of rent or building cost for the area the machine occupies.
• Operator: wages plus benefits, if you want a fully loaded rate (see below).

Insurance, software licences and compressed air are smaller items, but add them if they matter in your shop.

Formula Step by Step

1. Calculate annual depreciation: (purchase price − residual value) ÷ useful life in years.
2. Calculate finance cost: average investment × interest rate, where average investment = (purchase price + residual value) ÷ 2.
3. Add power: average kW draw × productive hours × electricity price per kWh.
4. Add maintenance: a percentage of purchase price, or actual service history if you have it.
5. Add tooling and consumables, and floor space (area × cost per m² per year).
6. Add operator cost if the rate is meant to include labour.
7. Calculate productive hours: scheduled hours × utilisation.
8. Divide the total annual cost by productive hours.

Productive hours are the hours when the machine is actually cutting or forming, not the hours it sits powered on. That is what step 7 is for.

Worked Example: 3-Axis vs 5-Axis CNC

Shared assumptions (illustrative; use your own figures):

• Useful life: 10 years; finance rate: 8%; residual value: 10% of price
• Scheduled hours: 4,000 per year (two shifts, about 250 days)
• Utilisation: 75%, so productive hours = 4,000 × 0.75 = 3,000
• Electricity: $0.12/kWh at an average 10 kW draw while productive
• Maintenance: 5% of purchase price per year
• Floor space: $120 per m² per year

The 5-axis machine costs about 69 percent more per hour. That does not mean parts cost 69 percent more. Take a part that needs 12 minutes on the 3-axis machine across multiple setups, but 7 minutes on the 5-axis machine in one setup:

• 3-axis: 12 ÷ 60 × $37.59 = $7.52
• 5-axis: 7 ÷ 60 × $63.40 = $7.40

Same part, near-identical machine cost, in spite of a much higher hourly rate. This is why you compare cost per part, not rate per hour, when choosing a process. (Fixturing and extra setups on the 3-axis route would tip it further toward the 5-axis.)

Utilisation: The Input That Moves the Rate Most

Utilisation is the share of scheduled hours the machine spends producing. Almost every cost in the rate is fixed. Depreciation, finance, floor space and the operator’s wage don’t fall when the machine sits idle. So fewer productive hours means the same cost spread over fewer hours.

Using the 3-axis example (treating all costs as fixed for simplicity):

Moving from 60 to 90 percent utilisation cuts the rate by a third. In reality, power and tooling rise with run time, so the swing is slightly smaller, but the direction is the same. When a quote seems high, ask what utilisation the supplier assumed. And when you build a rate, use a realistic utilisation, not 100 percent. Typical job shops run at 50 to 80 percent.

Machine Hour Rate vs Labour Rate

These are different numbers, and mixing them up double-counts or misses cost.

• Labour rate: the loaded hourly cost of a person (wages, benefits, payroll taxes). In the example, $22/h.
• Machine hour rate: the cost of the machine itself, with or without the operator.

There are two clean ways to handle it:

1. Machine-only rate plus a separate labour line. Use this when one operator tends several machines, or labour time differs from machine time (for example, manual setup).
2. Combined rate, as in the table above. Use this when one operator is tied to one machine for the whole cycle.

Pick one method and use it consistently across your estimates. If you want to see how these roll up into a part price, read how to calculate total manufacturing cost.

Using the Rate in a Should-Cost Model

In a should-cost model, each operation’s cost is:

Rates are the biggest lever in a bottom-up estimate, because they apply to every minute of every operation. A few practical rules:

• Keep a rate table by machine type, not one shop-wide number.
• Review it annually, and when you buy or retire a machine.
• Validate your rates against a few real supplier quotes before relying on them.

For the full method, see our should-cost analysis guide. For a ready-made spreadsheet, use the should-cost Excel template guide or run it in our should-cost analysis platform.

FAQ

What is a machine hour rate?

It’s the cost of running a machine for one productive hour, calculated by dividing its total annual cost (depreciation, finance, power, maintenance, tooling, floor space and optionally the operator) by its annual productive hours.

How do you calculate machine hour rate?

Add up annual depreciation, finance cost, power, maintenance, tooling and floor space (plus operator cost if included), then divide by productive hours, which equal scheduled hours multiplied by utilisation.

What is a typical CNC machine hour rate?

It varies widely by machine, region and what’s included. Rates of roughly $30 to $60 per hour for 3-axis machines and $60 to $120 or more for 5-axis machines are common when the operator is included, but you should calculate your own rate rather than rely on a benchmark.

What is the difference between machine hour rate and labour rate?

Labour rate is the loaded hourly cost of a person. Machine hour rate is the cost of the machine, and it may or may not include the operator. Use one method consistently so you don’t double-count labour.

Why does utilisation matter so much?

Most machine costs are fixed, so lower utilisation spreads them over fewer hours. In the example above, dropping from 90 to 60 percent utilisation raises the rate by 50 percent.

Should I include overhead in the machine hour rate?

Include costs directly tied to the machine (floor space, power, maintenance). General overhead such as admin and management is usually added separately as a percentage on top, so it isn’t counted twice.

Calculate Your Own Rates

Related reading: Should-cost analysis guide · Sheet metal cost estimation · Cost modeling in manufacturing