Fleet Break-Even Calculator
There is a distance below which your fleet loses money no matter how well it is run. This calculator finds it. Enter what a kilometre earns and what a kilometre costs, and it reports the monthly distance that covers your fixed base, plus how much room you have above it.
Your numbers
Depreciation, finance, insurance, yard, salaried staff. Costs that arrive whether you run or not.
Total billed revenue divided by total kilometres, including empty running.
Only the part that varies with running. Salaried drivers belong in fixed costs.
Tyre spend over a replacement cycle, divided by the distance it covered.
What the fleet really does in a normal month, across all vehicles.
Result
Break-even distance
80,000 km/month
Distance the fleet must run each month before it starts making money.
- Contribution per km
- 0.600
- Variable cost per km
- 1.300
- Monthly profit at current distance
- 108,000
- Margin of safety
- 69.2 %
- Revenue per km needed at current distance
- 1.485
The formula
- Variable cost per km = Fuel + Driver + Maintenance + Tyres + Tolls and road charges
- Contribution per km = Revenue per kilometre − Variable cost per km
- Break-even distance = Fixed costs per month ÷ Contribution per km
- Monthly profit = (Contribution per km × Distance actually run) − Fixed costs per month
- Margin of safety = ((Distance actually run − Break-even distance) ÷ Distance actually run) × 100
- Revenue per km needed at current distance = Variable cost per km + (Fixed costs per month ÷ Distance actually run)
Assumptions and limits
- Contribution per kilometre is treated as constant. It is not: a long trunk run and an urban multi-drop earn and cost completely different amounts per kilometre, and the blend moves with your order book.
- Fixed costs are only fixed within a range. Adding enough work to need another vehicle, another bay or another supervisor steps the fixed base up, and the break-even point jumps with it.
- Empty running is included in the distance by construction, because revenue per kilometre is calculated across all kilometres. Splitting revenue-earning distance from total distance is a different and more revealing exercise.
- If contribution per kilometre is zero or negative, there is no break-even distance at all. The result will show zero, which means running further makes the loss larger, not smaller.
- The model is monthly and ignores timing. A fleet can be above break-even for the year and still run out of cash in February.
- Currency is unit-agnostic. Enter every field in one currency and read every result in it.
Break-even is a distance, not an opinion
Fleets are unusual in that a very large share of their cost arrives before anything happens. On the first of the month you owe depreciation, finance, insurance, the yard and the salaried staff, and none of it cares whether a single vehicle turned a wheel. Everything after that is a race to cover it.
Break-even distance is how far the fleet has to run to win that race. Below it, working harder produces a smaller loss rather than a profit. Above it, every additional kilometre contributes at the full contribution rate, which is why the last twenty percent of volume is worth so much more than the first twenty percent.
The margin of safety is what you are really managing
Break-even on its own is a static fact. The margin of safety is the operational question: how much of your volume could disappear before the fleet stops covering its base. A fleet running comfortably above break-even can absorb a lost customer. A fleet running just above it cannot absorb anything at all, including a fortnight of bad weather.
This is where fixed-heavy operations get caught. The margin of safety narrows silently, because nothing about the day-to-day feels different at the margin. The vehicles still go out, the drivers still work, the invoices still go out. Then one contract renews at a lower rate and the whole month is under water.
Watch the margin rather than the profit. Profit tells you what happened. The margin tells you what a bad quarter would do to you.
Using the required rate to test a contract
The last output is the one to take into a pricing conversation. It is the revenue per kilometre you need at the distance you actually run, and it makes the arithmetic on a rate card unavoidable: below this figure, at this volume, the fleet does not cover its costs.
The trap it exposes is the low rate justified by volume. A cheap contract that fills empty capacity can be worth taking, because it contributes something against fixed costs you are paying anyway. But it only works if the capacity really was empty and the fixed base really does not move. If the contract needs three more vehicles and a night shift supervisor, the fixed base is not fixed, and the contribution argument collapses.
So test it twice. Once against variable cost, to see whether the work contributes at all. Once against this required rate, to see whether it contributes enough.
Frequently asked questions
Fixed, if you pay them whether or not the work exists, which is the case in most employed fleets. Only put driver cost in the per-kilometre field to the extent it genuinely varies with running: overtime, night rates, agency cover and subsistence. Getting this wrong in the flattering direction, by treating all wages as variable, will make your break-even distance look far lower than it is.
That each kilometre costs more to run than it earns, so the fleet loses money faster the more it works and no distance breaks even. The calculator reports zero rather than a nonsensical number. This is not always a disaster in the short term, since some fixed cost is recovered while you fix the pricing, but it is a situation with a deadline attached. Check the revenue field first: it is often understated because empty kilometres have been left out of the distance.
Both answer different questions. Whole fleet tells you whether the business covers its base and is what your finance team wants. Per vehicle, or per contract, tells you which work is carrying which, and that is the operational answer. A fleet comfortably above break-even overall can easily contain two contracts that lose money, subsidised by one that does not.
Distance is the unit most fleets can measure without argument, because the odometer settles it. Trips are a better unit if your work is priced per drop rather than per kilometre, and revenue break-even is better if the mix is so varied that a kilometre means nothing. Use whichever unit your rates are actually built on. If your rates are per drop, a per-kilometre break-even will mislead you.
Every time fuel price moves, every time a rate is renegotiated, and every time you add or dispose of a vehicle. In practice it moves monthly, which is why calculating it once a year and pinning it to the wall is worse than not calculating it. It should be a live figure, recalculated from actual cost and actual distance, not a slide from last budget season.
Stop estimating. Measure it.
Fleet Break-Even Calculator gives you the arithmetic. Fleet Analytics Software gives you the live numbers from your own fleet.