How do you calculate a machine hour rate?

Add up the machine's yearly costs (depreciation, interest on the capital if you charge it, floor space, insurance, maintenance and tooling), divide by the hours it actually runs in a year, and add the energy it uses per running hour. A $250,000 machine with $55,800 of yearly costs that runs 3,060 hours, plus 15 kW × 70% × $0.12 of energy, costs $55,800 ÷ 3,060 + $1.26 = $19.50 an hour before labour.

Should the operator's wage be in the machine hour rate?

Conventions differ, so this calculator shows both. Indian cost accounting answers from the ICAI include operator wages as a standing charge of the machine; the Iowa State machinery cost method keeps operator labour as a separate operating cost; most quotes price the machine and the operator separately so either can change. Never count the same operator in both the machine rate and a labour line.

Why divide by productive hours and not clock hours?

Because the yearly costs have to be recovered from the hours the machine makes parts. ICAI deducts maintenance hours, and set-up hours when they are not chargeable, before dividing. Dividing by every hour in the year (8,760) turns the example's $19.50 into $7.63, so every quote made with it loses money.

Should interest on the machine's cost be included?

It is a method choice. ICAI leaves interest on capital out of cost accounts as a financial matter. Machinery cost methods such as Iowa State's charge it as the cost of the money tied up, using a capital recovery factor. A simpler version charges the rate on the average capital, (cost + residual) ÷ 2. In the example that is $13,032 or $11,000 a year at 8%; leaving it out gives $15.90 an hour.

Depreciation by years or by machine hours?

Either. ICAI's examples use both: (cost − scrap) ÷ life in years, divided by the year's hours, or (cost − scrap) ÷ life in machine hours when wear follows use. This calculator takes the life in years. To use a life in hours, enter the life in years as life hours ÷ productive hours a year, for example 25,000 ÷ 2,500 = 10.

Is the machine hour rate the cost of downtime?

Not on its own. The yearly costs are spent whether the machine runs or not, so an hour of downtime costs the lost output, idle labour and overtime to catch up, which the downtime cost calculator works out. A cost deployment matrix does value lost machine hours at a machine hour rate, so agree that rate with Finance once and use it every month.

What load factor should I use?

The machine's average power draw while it runs divided by its rated power. A clamp meter or power logger over a few typical shifts gives it; the nameplate gives only the rating. If the machine stays powered while it waits for work, its pumps, chillers or hydraulics keep drawing power: add that idle energy to the other yearly costs.

How do I add set-up time to the cost per part?

Spread it over the batch: cost per part = machine hour rate × (cycle time + set-up time ÷ batch size). A 30-minute set-up on a batch of 200 adds 9 seconds to a 240-second cycle, so $19.50 × 249 ÷ 3,600 = $1.35 a part instead of $1.30.

Free tool

Machine hour rate calculator

A machine hour rate is what one productive hour of a machine costs: its yearly costs of ownership and upkeep divided by the hours it really runs, plus the energy it uses while running. Enter the machine's cost, life, space, maintenance, tooling, insurance, power and hours to get the rate with and without the operator, the cost per part, and how the rate moves when the machine runs more or less.

Depreciation a yearequalsinstalled cost − residual value divided by life in years

Interest a yearequalsinstalled cost + residual value divided by 2 × cost of capital

Productive hoursequalsshifts × hours a shift × days × utilisation

Machine hour rateequalsdepreciation + interest + space + insurance + maintenance + tooling divided by productive hours + kW × load factor × price per kWh

With labourequalsmachine hour rate + operator cost an hour × operators × paid hours divided by productive hours

Cost per partequalsrate × cycle time, s divided by 3,600 × parts per cycle

Fixed yearly costs are spread over the productive hours; energy is charged only for running hours. Method: ICAI Board of Studies, Overheads (machine hour rate) and Iowa State Extension, Estimating Farm Machinery Costs (A3-29, 2026) for interest and the capital recovery option. Interest and labour are method choices; the calculator lets you switch them.

The machine

Installed cost

Price, delivery, foundations, installation.

Residual value at the end

Life

The years you expect to use it, not the tax life.

Currency

Interest on the capital

(Cost + residual) ÷ 2 × rate. A method choice: agree it with Finance.

Cost of capital

Yearly costs of having it

Floor area

Include the operator and service space.

Unit

Cost of space per m² a year

Rent or building cost, heat, light, cleaning.

Insurance

Maintenance and repairs a year

Parts, contracts and maintenance labour.

Tooling a year

Cutters, inserts, dies, fixtures worn out.

Other costs charged to it a year

Optional: supervision share, consumables, software.

Energy while it runs

Rated power

Load factor

Average share of rated power drawn.

Electricity

Hours

Shifts a day

Hours a shift

Paid time less breaks.

Working days a year

Utilisation

Share of those hours it actually makes parts.

Operator labour (kept separate)Add the operator. Off: the machine rate alone, as most costing treats direct labour as its own line. On: a machine-and-operator rate for quotes.

Operator cost an hour

Wage plus benefits and payroll taxes.

Operators per machine

0.5 if one runs two machines.

Cost per part (optional)

Cycle time

Leave blank to skip.

Parts per cycle

Pre-filled with the worked example (illustrative). Every input is a site value; costing conventions differ, so agree the method with Finance.

Machine hour rate, before labour

$19.50

$55,800 a year of fixed cost over 3,060 productive hours, plus $1.26 of energy an hour.

With operator labour

$57.14

Labour $37.65 per productive hour

Cost per part

$1.30

$3.81 with labour

Productive hours a year

3,060

3,600 scheduled × 85%

Fixed cost of idle hours

$8,370

Unrecovered if you priced on scheduled hours

Where the rate before labour comes from

Depreciation$7.35 · 37.7%

Interest on capital$3.59 · 18.4%

Maintenance and repairs$2.94 · 15.1%

Tooling$1.96 · 10.1%

Floor space$1.57 · 8.0%

Energy$1.26 · 6.5%

Insurance$0.82 · 4.2%

The working, line by line

Each yearly cost divided by 3,060 productive hours (2 × 7.5 h × 240 days = 3,600 scheduled, × 85%). Energy is paid only while the machine runs: 15 kW × 70% × 0.12 per kWh.

Machine hour rate: each cost a year and per productive hour
Cost	A year	An hour
Depreciation	$22,500	$7.35
Interest on capital	$11,000	$3.59
Floor space	$4,800	$1.57
Insurance	$2,500	$0.82
Maintenance and repairs	$9,000	$2.94
Tooling	$6,000	$1.96
Other charged costs	$0.00	$0.00
Energy	$3,856	$1.26
Machine hour rate	$59,656	$19.50
Operator (1 × 32 × 3,600 paid h)	$115,200	$37.65
With labour	$174,856	$57.14

The same machine at other utilisations

Machine hour rate by utilisation of the scheduled hours, and over every hour of the year
Utilisation	Hours	Rate	With labour
50%	1,800	$32.26	$96.26
60%	2,160	$27.09	$80.43
70%	2,520	$23.40	$69.12
80%	2,880	$20.64	$60.64
90%	3,240	$18.48	$54.04
100%	3,600	$16.76	$48.76
Every hour of the year	8,760	$7.63	$39.63

Same yearly costs, different hours. The last row is the classic mistake: a rate spread over 8,760 hours looks cheap and recovers a fraction of the cost.

Next step

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Before you enter numbers

Choosing the inputs

Installed cost and life. Use what it cost to get the machine making parts: price, freight, foundations, installation. Take the life you expect to use it for, which is often different from the tax life, and a realistic resale or scrap value at the end.

Interest is a choice. Cost accountants following ICAI leave it out as a financing cost. Machinery cost methods such as Iowa State's include it as an opportunity cost, because the money in the machine could earn a return elsewhere; that matters most when comparing machines or making a make-or-buy case. Pick one with Finance and use it for every machine.

Space, maintenance and tooling. Floor area includes the operator's space and service access. Maintenance includes the maintenance team's time on this machine, not only parts. Tooling is what wears out in a year: inserts, cutters, dies.

Energy. The load factor is the average draw while running as a share of the rated kW. Measure it with a power logger if you can; the nameplate gives only the rating.

Hours. Scheduled hours are shifts × paid hours a shift less breaks × days. Utilisation is the share of those hours the machine actually makes parts, after planned maintenance, set-ups, breakdowns and waiting for work. Your OEE availability data or machine logs give it.

Worked example

Illustrative numbers, not a benchmark

A CNC machining centre installed for $250,000, used for 10 years and sold for $25,000. Cost of capital 8%, 40 m² of floor at $120 per m² a year, insurance 1%, maintenance $9,000 and tooling $6,000 a year. 15 kW rated at a 70% load factor and $0.12 per kWh. Two 7.5-hour shifts on 240 days; it makes parts 85% of that time. One operator at $32 an hour loaded. A part takes 4 minutes.

1Yearly costs: depreciation (250,000 − 25,000) ÷ 10 = $22,500. Interest (250,000 + 25,000) ÷ 2 × 8% = $11,000. Space 40 × 120 = $4,800. Insurance $2,500. Maintenance $9,000. Tooling $6,000. Total $55,800.
2Hours: 2 × 7.5 × 240 = 3,600 scheduled; × 85% = 3,060 productive hours.
3Fixed cost per hour: 55,800 ÷ 3,060 = $18.24. Energy: 15 × 0.70 × 0.12 = $1.26. Machine hour rate: $19.50.
4Where it comes from: depreciation 37.7%, interest 18.4%, maintenance 15.1%, tooling 10.1%, space 8.0%, energy 6.5%, insurance 4.2%.
5Operator: 32 × 3,600 paid hours = $115,200 ÷ 3,060 = $37.65 per productive hour. Rate with labour: $57.14.
6Cost per part: 19.50 × 240 ÷ 3,600 = $1.30 machine only; $3.81 with the operator.

$19.50 a machine hour before labour, $57.14 with the operator, $1.30 and $3.81 a part. At 60% utilisation the same machine costs $27.09 an hour; spread over 8,760 hours it would look like $7.63. The calculator above is filled in with this machine. The numbers are illustrative.

Used hours or capacity hours?

The yearly costs barely change with use, so the rate depends on the hours you divide by. In the example: $16.76 an hour at 100% of scheduled hours, $19.50 at 85%, $27.09 at 60%. Same machine, same costs.

For quotes and make-or-buy, use the hours you expect the machine to run next year. That is how a predetermined overhead rate works: estimated overhead divided by the estimated activity, machine hours being one of the usual bases (OpenStax, Principles of Managerial Accounting, 6.1).

For valuing stock, the accounting rule is different. IAS 2 (paragraph 13) spreads fixed production overhead over the normal capacity of the plant, allowing for planned maintenance, and says low production or idle plant does not raise the overhead per unit: the unabsorbed part is a cost of the period (IAS 2 Inventories). The calculator's "fixed cost of idle hours" is that unabsorbed part: $8,370 a year in the example.

For improvement cases, an hour freed by a faster changeover or fewer breakdowns is worth the machine hour rate only if it makes more saleable parts or avoids a cost such as overtime, a second shift or a new machine. Otherwise the yearly costs stay the same and the rate per hour simply goes up.

If utilisation falls and the rate is recalculated, quotes go up just when work is short. Decide which hours the rate is built on, write it down and keep it for the year, as the cost deployment matrix advises for its unit costs.

Mistakes that skew the rate

Theoretical hours. Dividing by 8,760 hours, or by scheduled hours at 100%, as if the machine never stops for set-ups, maintenance or lack of work. The example drops from $19.50 to $7.63, 61% too low.
Forgetting floor space and energy. Together $2.83 of the example's $19.50, about 15%. Space is easy to miss because rent is paid centrally.
Counting the operator twice. Once in the machine rate as a standing charge and again as direct labour on the routing.
Tax depreciation. Accelerated or tax lives load the early years. Use the life and residual value you expect.
Purchase price only. Leaving out freight, foundations, installation and commissioning understates depreciation and interest.
One rate for every machine. A shop-wide average hides that a large machining centre and a drill press cost very different amounts an hour. ICAI's examples work out a separate rate for each machine.
Rate set once, never checked. Compare the hours the machine really ran with the hours the rate assumed at least once a year, and reset it if they differ.

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How LeanSuite helps

LeanSuite does not calculate machine hour rates. Its Loss & Cost Management imports your loss data, builds a loss tree that puts a cost on each loss and tracks the savings as you remove them, which is where a machine hour rate agreed with Finance gets used.

See Loss & Cost Management

FAQ

Machine hour rate calculator: common questions

Add up the machine's yearly costs (depreciation, interest on the capital if you charge it, floor space, insurance, maintenance and tooling), divide by the hours it actually runs in a year, and add the energy it uses per running hour. A $250,000 machine with $55,800 of yearly costs that runs 3,060 hours, plus 15 kW × 70% × $0.12 of energy, costs $55,800 ÷ 3,060 + $1.26 = $19.50 an hour before labour.

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