An analysis of Bird's scooters in Louisville tracked units by serial number and put the average working life at about 28.8 days. Run the full cost stack against that lifespan, and each scooter finished its short career roughly $293 in the hole.
Bird went public via SPAC in 2021 at $2.3 billion. By December 2023, it had filed Chapter 11, having lost more than $430 million since the end of 2021, with the stock at eight cents. Lime, doing the same thing on the same sidewalks, was listed on the Nasdaq on July 1, 2026, at $25 a share and opened at $27.
Same product but opposite outcomes. The separating variable was never demand.
Unit economics is a fraction, and lifespan is the denominator
Every asset-heavy business runs on one piece of arithmetic: revenue per unit per day, times the days that unit stays alive, minus what it cost you.
The early operators spent 2018 and 2019 optimizing the first term. More cities, more rides, better pricing. Bird's fleet in Santa Monica was doing five to six trips a day, which reads like a healthy utilization story.
None of that affected the second term. A scooter earning $12 a day for 29 days generates roughly $350 of gross revenue against a vehicle costing $360 to $550, before charging, repairs, payment processing, insurance, and city permit fees. Doubling rides on a vehicle that dies in a month only accelerates the loss.
The cost stack made the point brutally. Charging ran about $1.72 per ride when Bird paid gig workers roughly $5 a night to take scooters home, plug them in, and redeploy them. Repairs added 51 cents. On a $3.70 ride, most of the margin disappears before the asset depreciates in a day.
Why the "professional charger" model was a trap
The charger network looked like a beautiful asset-light hack: no electricity bill, no warehouse, no employees, just a marketplace of people with spare outlets.
What it did was convert a fixed cost into a variable one, scaling with every ride and every night, while adding a van trip to the life of every scooter. Vehicles got driven to a house, charged, and driven back. Mileage and handling damage piled up, and the fleet aged in dog years.
Asset-light framing feels efficient right up to the point where the per-unit toll lands on the thing determining your survival.
Lime went after the denominator
When Wayne Ting took over Lime in 2020 with an $85 million lifeline from Uber, the company was losing roughly three dollars per dollar of revenue at a daily fleet decay rate near 3%, meaning it repurchased its entire fleet every month.
Three changes moved the math.
- The swappable battery, introduced in 2020, let a worker pull up, drop in a charged pack, and leave the scooter on the curb. In Paris, miles traveled per maintenance trip fell 87% between 2019 and 2025. Fewer van miles, less handling, longer life.
- Vertical integration on hardware and software let Lime design for repairability and parts reuse, something commodity consumer scooters were never built for.
- Warehouse accountability turned repair into a measured activity: vehicles fixed today and how long until each broke again. Whatever the best general manager figured out got written into the system and shipped to every other city.
The scooter that once survived 30 days now runs on a five-year depreciation schedule and, by Ting's account, pays itself back in under a year at a four- to five-times return on invested capital across its life.
Density turned into a moat, but only after the asset survived
Lime's 2025 numbers are unusual for a marketplace: average fleet grew 18%, almost entirely inside cities it already served, and revenue per vehicle per day still rose 10% to $7.47 (S-1 filing, June 2026).
Adding supply usually thins demand per unit. In micromobility it does the opposite, because riders are buying reliability. A scooter six minutes away is worthless. A scooter on your corner converts. Flood the city and every vehicle gets used more, which is why Lime spends under 2% of revenue on marketing. The scooters are the billboard.
That flywheel is only available to an operator who can keep buying vehicles. Bird could not because its vehicles evaporated.
Read the add-back, not the headline
Lime's 2025 revenue hit $886.7 million, up 29%, with adjusted EBITDA of $218.1 million and a net loss of $59.3 million. Adjusted gross margin sat near 53% against a reported gross margin of 39%.
This fourteen-point gap is vehicle depreciation.
Adjusted EBITDA on a scooter business adds back the single largest real cost in the model. Anyone underwriting Lime at roughly 7x adjusted EBITDA is making one bet: operational discipline keeps stretching asset life faster than the fleet wears out. If it slips, the depreciation that we cheerfully add back still sits there.
Founder takeaways
If you have a startup of your own, here are some lessons from this issue:
- Write your unit economics with time in them. Revenue per unit per day times days alive, minus fully loaded unit cost. If you cannot state the middle term confidently, you do not know whether you have a business.
- Instrument asset death before you scale deployment. Serial-number tracking of how long each unit survives and why it died is cheap to build early and near impossible to retrofit at 100,000 units.
- Price the wear, not just the invoice. Outsourcing an operation can quietly add handling, transport, and damage that shortens asset life.
- Treat every adjusted metric as a question. When a company adds a cost back, ask whether that cost is the core risk in the model. In hardware-heavy businesses, depreciation usually is.
- Fix the asset before you buy the market. Bird raised around $500 million and spent it on acquiring cities. Lime spent its survival years fixing warehouses and batteries, then built the density moat. Sequencing decided who trades on the Nasdaq.
