Deep-dive guide
Equipment Lease vs Buy Simulator: What a Machine Really Costs Per Hour of Use
Executive industry analysis
Buying a machine feels like building an asset and leasing feels like paying rent, but neither feeling is a calculation. What matters is the cost of each hour of useful work over the years you keep the equipment. A purchase turns one large price into a stream of costs: depreciation as the machine loses value, interest on the money borrowed, maintenance, insurance and the hours lost when it breaks down. Spread over few hours, those costs per hour are enormous. Spread over many, they almost vanish. That single idea, utilisation, decides most lease versus buy questions.
The structure of the problem is a bet on three unknowns. The first is usage: how many hours you will really run the machine, which is usually fewer than the sales brochure assumed. The second is resale: what the machine will fetch in five years, which is uncertain and moves with markets and technology. The third is reliability: how often it fails and how much each failure costs in repairs and lost work. A lease moves part of each bet to the lessor in return for a higher rate and no residual value, so it is a way of paying to avoid risk.
The domino cascade makes this visible. Low utilisation raises the ownership cost carried by each hour, which lowers the margin per hour. A thin margin leaves little to absorb a higher interest rate or a poor resale price, and monthly profit turns negative. Each stage feeds the next, so a drop in usage that looks small in the first box can turn the last one red. Because ownership cost is fixed while hours are variable, profit falls faster than revenue when work slows down, and that is when owners discover they bought for the peak.
The iceberg separates the price on the invoice from the true cost of ownership. Above the waterline are depreciation and running costs, which most owners can see. Below it sit four costs that rarely get their own line: interest paid over the life of the loan, maintenance and repairs, insurance, and the margin lost during breakdown hours. Together they often exceed the running cost of the machine itself. Use the simulator to find the usage level at which owning stops paying, then compare it with the lease before you sign anything.
Formula and methodology blueprint
The model works per month over a five-year term. The purchase is fully financed with a standard monthly payment. Depreciation is the price minus the expected resale value, spread over sixty months. Interest is the average monthly share of the payment that is not principal. Maintenance is a yearly percentage of price, and higher maintenance also raises breakdown downtime. Operating cost is a fixed amount per productive hour. Net is the margin from productive hours less all ownership costs.
- Monthly payment
- PMT = price × r / (1 − (1 + r)^−60), r = rate / 12
- The level payment of a fully financed purchase over sixty months.
- Ownership cost
- O = (price − resale) / 60 + interest + maintenance + insurance
- Monthly cost of holding the machine, whether or not it works.
- Downtime
- d = 2% + 0.8 × maintenance share, capped at 25%
- Share of scheduled hours lost to breakdowns. More costly upkeep signals an older, less reliable machine.
- Cost per hour
- C = O / (hours × (1 − d))
- What each productive hour carries in ownership cost.
- Machine result
- Net = productive hours × (rate − 30) − O
- Monthly profit, where 30 is the operating cost per hour. The break-even usage is where this reaches zero.
Cascading elasticity
Usage hours and revenue per hour are the most elastic inputs, because ownership cost is fixed and every missing hour comes straight off the margin. Price and resale value come next, since together they set depreciation. Interest and maintenance are smaller but compound with price, so they matter most on expensive machines.
Three real-world case studies
Bootstrapped starter
A small contractor buys a first machine
A one-person business buys a modest machine, finances it over five years and runs it about sixty hours a month. The price is low enough that even moderate usage covers ownership. Load it to see how a smaller machine can pay its way on modest hours.
Scaling mid-market
A busy fleet runs a large machine hard
A growing firm buys an expensive machine and keeps it busy for two hundred hours a month at a premium rate. Ownership cost is spread over so many hours that each carries very little. Load it to see why heavy use is the strongest argument for buying.
Black-swan crisis
A big machine bought for a contract that ended
A firm buys a costly machine for a large contract, which then ends. Usage falls to twenty-five hours, the loan rate is high, repairs are rising and resale prices are weak. Load it to see how fixed ownership cost turns a good purchase into a monthly loss.
Industry benchmark matrix
| Metric | Danger zone | Industry average | Top 10% elite |
|---|---|---|---|
| Machine utilisation (share of full month) | Below 30% | 45–65% | Above 75% |
| Ownership cost per hour against revenue per hour | Above 70% | 35–50% | Below 30% |
| Yearly maintenance as share of price | Above 12% | 4–7% | Below 4% |
| Resale value after five years | Below 15% | 25–40% | Above 45% |
| Breakdown downtime | Above 12% | 3–6% | Below 3% |
Variables and levers
Purchase price
Full price of the equipment, assumed to be financed over five years.
Lever: Compare the cheaper or smaller model against your real peak hours, because a machine sized for the busiest week sits idle the rest of the year.
Productive machine hours per month
Scheduled hours of billable or useful work before breakdowns are taken off.
Lever: Raise utilisation by renting the machine out or pooling jobs, since fixed ownership cost falls with every extra hour.
Revenue per machine hour
What an hour of machine work earns, including the operator's billed time.
Lever: Reprice machine time to cover true ownership cost per hour, not just the running cost.
Financing rate
Yearly interest on the loan used to buy the machine.
Lever: Shop the financing and keep the term matched to the machine's useful life; a lower rate cuts the hidden interest line directly.
Yearly maintenance
Servicing and repairs as a share of the price each year. Higher maintenance also means more breakdown hours.
Lever: Prepay a service plan or lease with servicing included, because unplanned repairs cost twice: the bill and the lost hours.
Resale value after five years
Share of the purchase price you expect to recover when you sell the machine at the end of the term.
Lever: Choose models and brands with a strong second-hand market and keep service records, since resale value is the biggest swing factor in owning.
How to use this simulator
- 1Enter the price and the financing rate quoted to you.
- 2Set the hours you will really use the machine each month and the revenue per hour.
- 3Add yearly maintenance and a cautious resale value.
- 4Read the five dominoes to see whether utilisation or ownership cost turns amber first.
- 5Open the Parallel universe tab to compare with the lease and share the link with your adviser.
Mistakes to avoid
- Sizing the machine for the busiest week. It then sits idle most of the year while its fixed cost keeps running.
- Using the optimistic resale figure from the dealer. Resale is the largest uncertain term, so test a figure ten points lower.
- Comparing the lease payment to the loan payment alone. A fair comparison includes maintenance, insurance, downtime and the residual you give up.
- Counting revenue from hours the machine does not run. Breakdowns and waiting time take scheduled hours off the productive total.
Frequently asked questions
When is leasing better than buying?
Usually when usage is low or uncertain, when the equipment changes fast, or when you value predictable servicing. Buying tends to win at high, steady utilisation. The Parallel universe tab compares both over 24 months.
Why is resale value so important?
Depreciation is the price minus resale, so a ten point change in resale shifts the cost of owning by thousands over the term. It is also the least certain input, so test a low value.
Does the model include tax effects?
No. Depreciation allowances, lease accounting and tax treatment differ by country and by business. Check current rules with your adviser before deciding.
What does the lease scenario assume?
You finance about 70% of the price at a rate three points higher, own no residual and pay 20% less for servicing. Real lease terms vary, so replace these with an actual quote.
Why does maintenance raise downtime?
A machine that needs heavy upkeep is usually older or harder worked, and it fails more often. The model links the two so that cheap-looking old equipment is not flattered.
How accurate is this?
It is an educational planning model with the assumptions shown, not financial or tax advice. Replace the inputs with real quotes before committing.
This is an educational planning model with stated assumptions. It is not financial, tax or legal advice. Replace the inputs with your own figures and verify important decisions with a qualified professional.