Equipment Depreciation Calculator
Estimate straight-line value loss, book value, hourly depreciation, and a separate repair allowance for equipment ownership planning. Results update automatically as inputs change.
How this calculator works
Annual depreciation = (purchase price - expected resale value) / useful life. Hourly depreciation = annual depreciation / annual billable hours.
Separate value loss from replacement savings
Use this calculator to account for the value a machine gives up while it works, even when there is no monthly payment left.
This tool is best for including machine value loss in cost per hour. It does not decide how much cash to save for the next machine. Review purchase basis, economic life, resale evidence, annual billed hours, and repair history before using the result in an hourly cost.
Worked example
A $65,000 machine with $25,000 expected resale over 6 years loses about $6,667 per year, or $9.52/hour at 700 billable hours.
Use conservative resale value and realistic annual billable hours so paid-off equipment is not priced like it is free. Keep cash planning separate with the Replacement Fund Planning Guide, and test the broader ownership picture in the Total Cost of Ownership Calculator.
Review the ownership assumptions
- Use depreciation even when there is no loan payment.
- Review resale value after major hours or damage.
- Model future replacement cash separately from straight-line value loss.
- Add a documented repair allowance without counting the same cost twice.
Keep the final scope, assumptions, exclusions, allowances, change triggers, and post-job results with the estimate so future defaults are supported by evidence.
Common questions
Is depreciation the same as a replacement reserve?
No. Depreciation spreads an entered loss in value across a planning period. A replacement reserve estimates the cash needed for a future machine after savings and expected resale; use the separate replacement-fund calculator for that decision.
Does this calculate tax depreciation?
No. This is straight-line economic planning math. Tax basis, recovery periods, elections, and reporting require current records and qualified tax advice.
How should useful life and resale value be chosen?
Use the machine's intended ownership period, expected hours and condition, and current dealer, trade, or auction evidence. Run a range when resale is uncertain.