Construction Equipment Rent vs Own Calculator
Recommendation: Rent
At 100 days/year utilization, renting saves 13% annually. Consider owning if utilization exceeds 118 days/year.
5-Year Comparison
| Year | Own (Annual) | Rent (Annual) | Own (Cumulative) | Rent (Cumulative) |
|---|---|---|---|---|
| 1 | $28,000.00 | $24,500.00 | $28,000.00 | $24,500.00 |
| 2 | $28,000.00 | $24,500.00 | $56,000.00 | $49,000.00 |
| 3 | $28,000.00 | $24,500.00 | $84,000.00 | $73,500.00 |
| 4 | $28,000.00 | $24,500.00 | $112,000.00 | $98,000.00 |
| 5 | $28,000.00 | $24,500.00 | $140,000.00 | $122,500.00 |
This rent-vs-own calculator compares the annual cost of owning a piece of construction equipment against renting it for the days you actually use it. Ownership cost bundles straight-line depreciation, financing on the average balance, maintenance, insurance, and storage; rental cost picks the cheapest mix of daily, weekly, and monthly rates for your utilization. It finds the break-even days per year, projects a five-year cumulative comparison, and recommends rent or own.
Formula
Annual ownership = (Price − 0.1×Price) / Life + (Price/2 × Rate) + Maintenance + Insurance + Storage
- Price
- Equipment purchase price
- Life
- Useful life in years (straight-line depreciation, 10% salvage)
- Rate
- Financing rate as a decimal, applied to the average balance (Price ÷ 2)
- Maintenance / Insurance / Storage
- Annual carrying costs in dollars
How it works
- Enter the purchase price, useful life, and annual carrying costs (maintenance, insurance, storage) plus a financing rate. Depreciation is straight-line assuming a 10% salvage value, and financing is charged on roughly half the purchase price as the average balance.
- Enter daily, weekly, and monthly rental rates and your annual utilization in days. The calculator builds the lowest-cost rental package using months (≈22 working days), weeks (5 days), and remaining days, capped by the straight daily total.
- It compares annual ownership versus rental cost, solves for the break-even utilization where the two are equal, runs a five-year NPV at a discount rate (the higher of your financing rate or 5%), and recommends the cheaper option for your usage level.
Worked example
A $150,000 excavator with a 7-year life, $8,000 maintenance, $3,000 insurance, $2,000 storage, 7% financing, rented at $1,200/day, $4,000/week, $12,000/month, used 100 days a year.
- Depreciation: (150,000 − 15,000) / 7 = $19,285.71. Financing: 75,000 × 7% = $5,250.
- Annual ownership: 19,285.71 + 5,250 + 8,000 + 3,000 + 2,000 = $37,535.71.
- Rental for 100 days: 4 months (≈88 days) leaves 12 days = 2 weeks (10 days) + 2 days, so 4×12,000 + 2×4,000 + 2×1,200 = $58,400, well below the straight daily total of 100×1,200 = $120,000.
- Owning ($37,535.71) is cheaper than renting ($58,400) at 100 days, with a break-even near 60 days.
At 100 days/year, owning costs about $37,536 versus $58,400 to rent — owning saves roughly 36%, and the break-even is about 60 days per year.
Frequently asked questions
- How is the break-even utilization found?
- The calculator searches for the number of rental days per year at which the optimal rental cost equals the annual ownership cost. Below that threshold renting is cheaper; above it, ownership wins because the fixed carrying costs are spread over more usage.
- Why does the rental cost not just multiply days by the daily rate?
- Weekly and monthly rates are discounted, so for longer durations the calculator assembles the cheapest mix of monthly (about 22 working days), weekly (5 days), and daily blocks, then caps that against the straight daily total. This reflects how rental houses actually price extended terms.
- What does the five-year NPV add over the annual comparison?
- The NPV discounts each year of cost back to present value using the higher of your financing rate or 5%, so it accounts for the time value of money over the holding period rather than treating a dollar spent in year five the same as one spent today.
- What costs are not captured?
- The model omits resale timing beyond the 10% salvage assumption, mobilization and delivery fees, operator labor, fuel, downtime, and tax effects like Section 179 depreciation. Treat the recommendation as a first-pass financial screen rather than a complete acquisition analysis.