The lease-versus-buy decision is often made on accounting preference rather than on the underlying economics. Both can be correct; the deciding factors are risk appetite, capital availability and how well you manage vehicles.
The main options
Outright purchase. You own the asset, carry the residual value risk and the reward, and control everything — specification, maintenance, holding period, disposal timing.
Contract hire (operating lease). Fixed monthly payment for an agreed term and mileage. The lessor carries residual risk. Maintenance may be included. The vehicle returns at term end, subject to condition and mileage terms.
Finance lease. You take substantially all the risks and rewards of ownership without legal title, typically with a balloon or a share of sale proceeds at the end.
Hire purchase. Purchase funded over a term, with ownership transferring at the end. Economically close to buying with finance.
Short-term and flexible hire. Monthly or seasonal rental at a premium rate, with maximum flexibility.
Accounting treatment of leases has converged in recent years under both IFRS and US GAAP, with most leases appearing on the balance sheet. If your decision was historically driven by off-balance-sheet treatment, revisit it — confirm the current position with your accountants.
A lessor bears residual and sometimes maintenance risk, and prices it. That premium is worth paying if you value cost certainty, lack capital, or manage vehicles poorly.
The comparison
| Factor | Purchase | Contract hire |
|---|---|---|
| Capital required | High | Low |
| Residual value risk | Yours | Lessor's |
| Residual value upside | Yours | Lessor's |
| Cost certainty | Variable | Fixed |
| Specification freedom | Complete | Constrained by lessor policy |
| Holding period | Your choice | Fixed by contract |
| Mileage flexibility | Unlimited | Contracted, with excess charges |
| Condition at return | Irrelevant | Charged, sometimes substantially |
| Maintenance control | Yours | Often the lessor's |
| Administrative burden | Higher | Lower |
| Early termination | Sell the vehicle | Contractual penalty |
| Effective cost | Lower if well managed | Includes the lessor's risk premium |
When leasing usually wins
- Capital is constrained or better deployed elsewhere in the business
- Cost certainty matters more than the lowest expected cost
- Fleet size is small, so administration and disposal expertise are lacking
- Vehicles are replaced frequently on a predictable cycle
- Residual values are uncertain — as with early electric vehicle adoption or vehicles facing emission zone restrictions
- You want maintenance bundled and administratively simplified
When buying usually wins
- Capital is available at a reasonable cost
- Vehicles are kept long, beyond typical lease terms
- Mileage is unpredictable or high, making excess charges likely
- Specification is specialised — conversions, bodywork, fitted equipment
- You manage condition well, avoiding the end-of-contract charges that surprise many lessees
- Fleet size supports in-house maintenance and disposal expertise
- You want flexibility to redeploy, extend or dispose when it suits you
The charges that catch people out
Excess mileage. Contracted mileage is a forecast; forecasts are wrong. Model your actual historical variance and negotiate the excess rate, not just the allowance.
Damage and condition. Return standards are defined in the contract and applied strictly. Fleets routinely receive end-of-contract charges they had not budgeted. Inspect vehicles a few months before return and rectify economically, rather than at the lessor's rates.
Early termination. Penalties can be substantial. If your business is changing shape, that flexibility has real value.
Maintenance exclusions. "Fully maintained" contracts have exclusions — tyres beyond fair wear, damage, glass, misfuelling. Read the schedule.
Making the comparison
Model both as total cost over the same period, per mile or per operating hour:
Purchase: acquisition + finance cost + maintenance + tyres + insurance + tax − residual, over the period.
Contract hire: monthly payments × term + excluded costs + expected excess mileage + expected condition charges.
Run the purchase model with high, expected and low residual scenarios. If purchase wins only at the high residual, the decision rests on a used-market forecast — which is precisely the risk contract hire removes.
Frequently asked questions
Is leasing more expensive than buying?
Usually slightly, over the full term, because the lessor prices the risk they carry. That premium buys cost certainty and removes residual risk, which can be worth more than the difference depending on your circumstances.
Does leasing keep vehicles off the balance sheet?
Under current accounting standards, most leases are recognised on the balance sheet. Confirm the specific treatment with your accountants rather than relying on the historical position.
What about electric vehicles?
Uncertain used-EV residual values make leasing attractive for early adopters, since the lessor bears the risk. As the market matures and residuals become predictable, that advantage narrows.
Can we mix approaches?
Commonly and sensibly: lease the standard vehicles replaced on a predictable cycle, buy the specialised ones kept long-term, and use short-term hire for peaks. A single funding policy across a mixed fleet rarely optimises anything.
What is the most common mistake?
Setting contracted mileage too low to reduce the monthly payment, then paying excess charges that exceed the saving. Model your actual mileage distribution, including its variability, before agreeing the allowance.
