Equipment Costing: Charging Jobs for What They Actually Use

The Asymmetry That Distorts Your Margins

When you rent an excavator for a job, the invoice arrives with the job name on it and the cost lands where it belongs. When you use the excavator you own, nothing happens in your accounting at all. The loan payment, insurance, maintenance and fuel sit in overhead, unconnected to the job that consumed them.

The result is systematic distortion. Jobs that use owned equipment look more profitable than they are. Jobs that rent look worse. Your bidding gradually skews towards whichever is misrepresented, and because the error is embedded in how costs are recorded, no amount of staring at job reports will reveal it.

Building an Internal Rate

The fix is to charge jobs an internal hourly or daily rate for owned equipment, the same way a rental company would invoice you. The job absorbs a realistic cost; the equipment account collects those charges and is measured against what the machine actually costs to own and run.

To set the rate, total the annual cost of the machine:

• Ownership costs — depreciation or loan principal, interest, insurance, registration and any storage
• Operating costs — fuel, routine maintenance, repairs, tyres, wear parts
• Major component reserve — an annual provision for the rebuild or replacement that is coming whether or not it is budgeted

Then divide by realistic annual utilisation hours. As with labour burden, the denominator is where people go wrong: assume the machine works far more hours than it does and your rate will be too low, quietly under-charging every job.

Be honest about utilisation. Most owned equipment works considerably less than owners estimate, and idle time is precisely the cost that ownership imposes and rental does not.

Depreciation Alone Is Not the Answer

A common shortcut is to allocate book depreciation and stop there. Two problems with that.

Tax depreciation is designed to produce a tax outcome, not to measure consumption. Accelerated methods can write off most of a machine's cost in its first year or two, after which your allocation says the machine is free. It is not — it still burns fuel, still needs repair, and will still need replacing.

Second, depreciation is historical while replacement is a future cost at a future price. A rate built to recover only original cost will not fund the replacement when it arrives. If you want the equipment to pay for its own succession, the reserve has to reflect what the next one will cost.

Reading the Equipment Account

Once rates are charged to jobs, the equipment account becomes informative. Charges out versus actual costs in tells you whether your rate is set correctly, and whether owning is working.

Persistently under-recovering usually means one of three things: the rate is too low, utilisation is below what you assumed, or maintenance costs have risen on an ageing machine. Each points to a different decision, and you cannot distinguish between them if equipment costs are pooled in overhead.

This is also the analysis that answers the own-versus-rent question honestly. Compare your fully loaded internal rate against the market rental rate for the same machine. If renting is cheaper at your actual utilisation, the machine is costing you money to own — and the calculation should include the capital tied up, not only the cash cost.

Small Tools Need a Different Treatment

Tracking a $400 compactor at an hourly rate costs more than the information is worth. Small tools and consumables are better handled as an indirect cost allocated across jobs on labour hours or labour dollars.

That keeps the cost inside production rather than general overhead, without creating a tracking burden nobody will maintain. As with cost codes in your chart of accounts, the test is whether the extra precision would change a decision.

Start With the Big Machines

You do not need a full fleet costing system to benefit. Take your three or four largest pieces of equipment, build a defensible rate for each, and start charging jobs. Those few machines represent most of the distortion.

Once that is running for a year you will have real data on utilisation and cost recovery — which is exactly what you need before the next purchase decision, and considerably better than the instinct most equipment is bought on.

If you want help building rates from your actual equipment costs, get in touch and we will work through them with you.