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Finance and growth

Plant hire profit margins explained

Gross and net margin in plant hire explained: how to calculate margin per machine, what drives it, where it leaks, and the levers that improve it.

Guide specPHSUG-77
Read time6 min
LevelIntermediate
MeasurePer machine
UpdatedOct 2026

Key takeaways

  • Gross margin is hire income minus the direct costs of the machines; net margin is what's left after overheads.
  • Measure margin per machine: fleet averages hide the losers.
  • Utilisation, rate discipline and delivery pricing drive margin more than anything else.
  • Margin leaks through free delivery, unbilled extras, downtime and bad debt.

Gross and net margin

MeasureFormulaTells you
Gross margin(Hire income − direct machine costs) ÷ hire incomeWhether the fleet earns
Net marginNet profit ÷ total revenueWhether the business earns after overheads

Direct machine costs are finance or depreciation, servicing and repairs, insurance and tracking for the machine. Overheads are the yard, office, vehicles, staff not tied to one machine, marketing and software.

Margin per machine

machine margin = hire income from the machine − (finance + servicing + repairs + insurance share + tracker)

Work it out monthly from your booking system and accounts. Rank machines by margin and look hard at the bottom three. See utilisation and break-even.

What drives margin

DriverEffect
UtilisationFixed costs spread over more hire weeks
Rate disciplineFewer discounts and free extras
Machine costBuying well, used where sensible
MaintenanceLess downtime and fewer big repairs
AttachmentsHigh-margin add-ons
Delivery pricingTrips that pay for themselves

Where margin leaks

  • Free or under-priced delivery.
  • Fuel, cleaning and damage not charged.
  • Hire days lost through late off-hire processing.
  • Long-hire discounts that are too deep.
  • Bad debt and slow payers.
  • Machines waiting for parts.

Levers to improve it

  1. 01

    Price from cost

    Use the rate calculator for every machine.

  2. 02

    Charge delivery properly

    Use the delivery calculator.

  3. 03

    Bill every extra

    Fuel, cleaning, damage, attachments.

  4. 04

    Raise utilisation

    Promote idle machines; sell persistent losers.

  5. 05

    Protect cash

    Deposits, credit limits and prompt chasing.

FAQs

Common questions

What is a good profit margin for plant hire?
It varies widely with fleet, utilisation and market. Measure gross margin per machine and net margin for the business, and focus on improving your weakest machines rather than comparing with averages.
How do I calculate margin per machine?
Take the machine's hire income for the month and subtract its direct costs: finance or depreciation, servicing, repairs, insurance share and tracker.
What reduces plant hire margins most?
Low utilisation, discounting, under-priced delivery, unbilled extras, downtime and bad debt.

This guide is general information for people setting up a plant hire business in the UK. It is not legal, tax, insurance or financial advice. Rules and thresholds change, so check current guidance on GOV.UK and take advice from an accountant, solicitor or broker before acting.