Every fleet manager can quote a repair estimate from memory. Almost none can quote what the downtime itself costs — and that number is usually bigger than the repair bill. This calculator combines trucks down, your revenue per truck per day, days out of service, and the repair estimate into one total cost figure, so the repair-vs-replace and tow-vs-limp decisions are math instead of gut feel.
The calculator separates downtime cost (lost revenue while the truck isn't running — the number most fleet managers never actually calculate) from the repair cost (what's usually the only number tracked). Adding them gives the real total cost of the breakdown, which is the figure that should actually drive decisions like whether to expedite a repair at a premium, rent a replacement vehicle, or in extreme cases replace the truck outright.
A $1,200 transmission repair sounds like the whole story. It isn't. If that truck is down for 4 days at $550/day in lost route revenue, the actual cost of the breakdown is $3,400 — nearly triple the repair bill. That gap is exactly why paying a premium for faster turnaround (a remanufactured transmission swap in 2 days instead of a 5-day rebuild, for example) is often the financially correct call even though the repair line item is higher. Fleet managers who only look at the repair quote consistently choose the cheaper-but-slower option and lose money on the decision.
The same math applies to whether an aging vehicle is worth continuing to repair. If a truck has racked up three downtime events this year, each costing $2,000-4,000 in combined repair and lost-revenue cost, that's $6,000-12,000 in total cost of ownership that never shows up on a single repair invoice — it only becomes visible when you total the downtime cost alongside the repair bills. Run this calculator on your last 3-4 breakdowns for a given vehicle and add up the totals; that combined number, not any single repair quote, is what should inform a replace decision.
If you're unsure what to enter for revenue per truck per day, here are reasonable starting points based on aggregated small-fleet data: HVAC and trades service vans typically run $300-800/day depending on call volume and ticket size; last-mile delivery routes run $180-400/day; construction and landscaping trucks tied to crew productivity can represent $500-2,000/day in crew idle cost alone when a truck grounds the whole crew; food truck and catering vehicles risk $500-1,500/day plus potential spoiled inventory; NEMT and medical transport vehicles carry regulatory and missed-appointment costs on top of the base revenue figure. Use your own numbers where you have them — these are starting estimates only.
Once you know what the downtime is costing, the next step is knowing what's actually wrong. Run a free AI triage for the specific symptom and get likely causes, safety steps, and a realistic repair cost range in under two minutes.
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