A cost-per-vehicle-per-day finance can close the books on
Cost per vehicle per day is dwell multiplied by what each phase costs. Most operators can produce the invoices but not the dwell, so the figure is estimated at month end, and an estimated number loses every argument. Parq.ai runs a dwell clock per phase on every VIN, so the number comes from recorded events, not memory and a stack of vendor bills.
1.2M+status events620,000+timeline entries100,000+work orders
Why the number is usually an estimate
The arithmetic is easy: cost divided by custody days. The hard part is that the two inputs live in different worlds. Costs arrive as invoices, organized by vendor and site, on the vendor's billing cycle. Dwell is a physical fact nobody wrote down, so it is inferred later from arrival and departure dates, which collapses six phases into one number.
That collapse makes the figure useless operationally. A unit that sat nine days is actionable only if you know it spent one day in intake, one in inspection, and seven waiting on a glass vendor. "Nine days at a blended rate" says the total was too high and gives you nowhere to push.
What has to be true to compute it accurately
Three things. Phase timestamps on every unit, captured as the work happens. Cost rules set per program, so storage rates, transport legs, wash, and recon labor attach to the right units without a spreadsheet in the middle. And one record that both the yard and finance read, so the operations number and the close number match.
The third one is the one people underestimate. Most disagreement about cost-per-vehicle-per-day is not disagreement about cost - it is two teams computing from two datasets and defending their own. Removing the second dataset ends the argument structurally.
What this looks like in your operation
Rental and mobility fleets. Utilization is the headline metric, but the cost of the non-utilised days is what quietly decides the program's margin. Phase-level dwell tells you whether idle units are idle by demand or idle by process.
Auto logistics and remarketing. You are billing clients for time and handling, which means your cost basis and your invoice basis need to reconcile per VIN. Disputes are won with a phase history, not with an average.
Last-mile and delivery. Dwell is short and volume is enormous, so cost-per-vehicle-per-day is sensitive to small process failures repeated thousands of times. This is where a per-phase breakdown pays for itself fastest.
AV and robotaxi operations. Charging, cleaning, and calibration are recurring cost centres with no driver absorbing any of the labor. Attributing them per unit per day is the only way to model unit economics as the fleet scales.
What stays in your GL
Parq computes the operating half: costs that accrue while a vehicle is worked on or waiting. Depreciation, insurance, financing, and overhead stay in your accounting system. If finance wants a fully loaded figure, Parq supplies the operating component per VIN and pushes it on your close schedule through ERP and accounting exports.
Frequently asked questions
Yes. Cost rules are configured per program, so storage, transport, wash, recon, and charging attach to the correct units and roll up by client, sub-client, market, or site without a separate reconciliation step.
No. It supplies the operating cost component with per-VIN attribution and exports it on your close schedule. Depreciation, insurance, financing, and overhead allocation stay in your accounting system.
Site-level invoices are allocated across the units that were actually present and in the relevant phase during the billing period, using the recorded dwell rather than a flat per-unit split. The allocation basis is visible on the record, which is what makes it defensible.
Terms used on this page are defined in the fleet operations glossary, including cpvd, dwell time, readiness gate.
Thirty minutes, screen-shared. We take one of your vehicles through every gate in the live product.