Business & equipment finance
Will the machine pay for itself? A practical way to run the numbers
21 July 2026 · 6 min read
Most equipment decisions get made on the purchase price and the monthly repayment. Those are the two easiest numbers to find and the least useful on their own. The question that matters is whether the asset earns more than it costs once you include running costs, downtime and the work it lets you take on that you currently turn away.
Start with the work, not the machine
Before pricing anything, write down what the asset lets you do that you cannot do today. More jobs per week? A job type you currently subcontract? Fewer hire costs? Lower labour hours on the same output?
If the honest answer is 'it would be nicer than what we have', that is a legitimate reason to buy — but it is a comfort purchase, not an investment case, and it should be sized accordingly.
Build the monthly picture
Work in months, because that is how the repayment arrives. Four figures are enough to make a decision:
- Additional revenue the asset realistically generates each month
- Direct operating costs — fuel, consumables, maintenance, tyres or tooling, insurance, registration
- Additional labour, if someone has to operate it
- The finance repayment, including the effect of any deposit or residual
Be conservative about utilisation
The most common modelling error is assuming full utilisation from day one. Machines sit idle during wet weather, breakdowns, staff leave and slow months. Running the numbers at 60 to 70 per cent of your optimistic case gives you a figure you can actually plan against.
If the deal only works at full utilisation, it is not a deal — it is a hope.
Structure changes the answer
Term, deposit and residual all move the repayment, and they are levers rather than fixed conditions. A longer term lowers the monthly figure but increases total interest. A residual lowers the repayment but leaves a lump sum to deal with at the end. A deposit or trade-in reduces the amount financed.
The right structure usually matches the repayment profile to how the asset earns — not to the lowest possible monthly number.
Then talk to your accountant
How the purchase is treated for tax and depreciation, and which structure suits your entity, is a conversation for your accountant or tax adviser. We will explain the practical differences between structures in plain English, but we do not provide tax advice.
The Finsterl view
Our equipment profitability calculator is built around exactly this comparison — revenue in, costs and repayment out. If the numbers do not stack up yet, we would rather tell you that and revisit it in six months than write a deal that puts pressure on your cash flow. Calculator outputs are estimates only and do not constitute financial advice or a guarantee of business performance.
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