Cargo e-bike break-even depends on the job, not just the bike. A rental fleet earns by booked time or bookings, while a delivery fleet earns by drops, routes, or paid hours. Those units need separate models.
Build the spreadsheet around annual fixed costs, variable cost per billable unit, and usable capacity. Then test low, base, and high demand. A 50% utilization assumption is a scenario, not a promise.
Published specifications make useful starting inputs. Tern's official cost comparison lists a $0.08 full-charge cost and a 76-mile range for the Tern HSD P10. Separately, Fleet News reports an Energy Saving Trust benchmark of GBP 342 in annual operating costs over 7,500 miles, excluding purchase or funding costs. Neither figure replaces local quotes or route data.
Use a break-even formula that matches the work
Break-even is not simply fixed costs divided by utilization. Utilization determines how many billable units you sell; it does not change the cost of one booking, drop, or paid hour.
Start with these relationships:
Annual contribution = annual revenue - annual variable costs
Break-even occurs when annual contribution equals annual fixed costs
Break-even revenue = annual fixed costs + annual variable costs
That last formula works when you have already estimated variable costs for the period. For a per-unit model, use contribution instead:
Break-even units = annual fixed costs / (price per unit - variable cost per unit)
Break-even utilization = break-even units / available billable units
For example, a rental booking priced at $30 with a $4 variable cost creates $26 in contribution. If annual fixed costs are $5,200, the bike needs 200 bookings to cover them, before any other annual costs outside that booking calculation.
Use one primary unit per model. A rental model might use booked hours or completed bookings. A delivery model might use completed drops, routes, or productive paid hours.
Put every cost in the right bucket
A useful worksheet separates cash outlays from recurring operating costs. It also makes mixed costs visible instead of hiding them in one optimistic estimate.
| Cost line | What to record | How to treat it |
|---|---|---|
| Purchase and setup | Bike invoice, assembly, locks, racks, cargo equipment | Include in first-year cash payback, or annualize as an asset cost |
| Insurance, permits, storage, and software | Commercial quotes and recurring fees | Usually fixed by month or year |
| Electricity | Local tariff, charging losses, miles, or full-charge equivalents | Variable with use |
| Maintenance | Tires, brakes, drivetrain, inspections, repairs, and parts | Track by mile, hour, booking, or month |
| Labor | Rider wages, loading, dispatch, cleaning, and supervision | Variable if work scales with demand; fixed if salaried |
| Payment and booking fees | Per-transaction fee or percentage of revenue | Variable |
| Battery replacement reserve | Expected replacement policy and downtime | Keep separate from routine charging |
A purchase is a cash outlay, not automatically a one-year operating expense. For an operating view, use depreciation, a replacement reserve, or another annual asset charge. Do not also add the full purchase price for the same period.
Financing needs its own label. Include interest and loan fees if you are measuring cash flow, or leave them out if the model is strictly an unfinanced operating comparison.
Use published benchmarks without double-counting
Tern's HSD P10 example shows why model-specific inputs matter. Using its published figures, a bike traveling 2,500 miles would use about 32.9 full-charge equivalents:
2,500 miles / 76 miles per charge x $0.08 = about $2.63
That is a simple estimate. Actual energy use can differ with load, hills, temperature, tire pressure, battery condition, riding style, and charging losses. The number belongs to that model and those published assumptions.
Turns out, charging can be the easiest line to calculate, but it may not be the largest line in a commercial operation. Labor, downtime, insurance, repairs, and customer handling can matter much more.
The GBP 342 benchmark needs similar care. Fleet News says the Energy Saving Trust study covered one year and 7,500 miles, excluding funding or purchase costs. It is a UK benchmark, not a universal US operating price. Use it as a reasonableness check for a broader operating budget, and keep the currency and market visible in your worksheet.
Do not add GBP 342 to your own electricity and maintenance lines if you are using it as a total operating benchmark. That would count some costs twice. The Energy Saving Trust's eCargo bike information is useful context, but your own electricity tariff, labor market, insurance, and route pattern still control the result.
Turn utilization into a revenue forecast
Utilization only makes sense beside a clear capacity definition.
| Use case | Choose one primary unit | Available capacity should mean |
|---|---|---|
| Rental | Booked hour, booked day, or completed booking | Open hours or days after planned closures and maintenance |
| Delivery | Completed drop, productive hour, or route | Scheduled paid hours, routes, or service capacity |
| Mixed operation | Separate rental and delivery rows | The capacity assigned to each service |
A bike open for eight rental hours a day across 250 days has 2,000 available hours. At 50% utilization, it would produce 1,000 booked hours. If your model uses day rentals instead, do not paste those hours into a bookings column.
A Financial Models Lab rental KPI reference uses 40% to 60% as a planning range. Treat that range as a scenario band, not an industry guarantee. Build separate 40%, 50%, and 60% cases, then compare them with your actual booking and route records.
For a capacity-based rental model, the formula is:
Annual revenue = full-capacity revenue per day x utilization x operating days
If daily revenue already reflects actual bookings, do not multiply by utilization again. That mistake makes a weak forecast look stronger than it is.
Delivery utilization needs another distinction. A bike can be deployed for a full shift and still spend much of that shift waiting, loading, charging, or returning to a depot. Track productive work separately from time on the schedule.
A transparent one-bike break-even example
This sample uses US dollars and deliberately plain assumptions. The $5,000 purchase price is a placeholder, not a quoted Tern price.
| Input | Assumption | Calculation |
|---|---|---|
| Purchase and setup | $5,000 | Replace with your invoice |
| Annual insurance and overhead | $500 | Assumed fixed cost |
| Maintenance allowance | $200 | Replace with service records |
| Electricity | $2.63 | 2,500 miles / 76 miles x $0.08 |
| First-year cash cost | $5,702.63 | Total of the lines above |
| Available rental capacity | 3 bookings per day | 250 operating days |
| Expected utilization | 50% | 1.5 bookings per day |
| Price per booking | $30 | Assumed local test price |
| Expected annual revenue | $11,250 | $30 x 1.5 x 250 |
The expected revenue is $45 per operating day. The first-year cash cost averages $22.81 per operating day across 250 days. At the assumed booking volume, the bike covers the first-year cash outlay after about 127 operating days.
That is cash payback, not full economic profit. The sample excludes rider labor, payment fees, taxes, storage, theft, downtime, battery replacement, and any cost that was not listed. Add those lines before using the result to approve a fleet purchase.
The model also shows why utilization belongs in the revenue calculation. At 50%, the bike sells 1.5 bookings per day. It does not make the $5,000 purchase cost disappear or turn it into a smaller fixed cost.
For a recurring operating view, replace the purchase price with your chosen annual asset charge. That might be depreciation or a replacement reserve based on your own service-life policy. Keep the cash-payback view and the operating view in separate tabs.
Adapt the model for delivery work
Delivery revenue is usually better modeled by contribution per drop, route, or productive hour than by a daily rental price.
Contribution per drop = delivery revenue per drop - variable cost per drop
Variable cost may include allocated rider labor, payment or dispatch fees, electricity, maintenance, and other costs that rise with each job. If you pay riders a fixed salary, classify that labor according to your accounting policy instead of forcing it into a per-drop number.
Break-even drops = annual fixed costs / contribution per drop
Add annual costs that sit outside the per-drop calculation before dividing. The same approach works for routes or paid hours.
A bike-to-van comparison must cover the same work. Compare the cost of completing the same deliveries, with comparable labor, insurance, maintenance, parking, route time, payload, and service levels. The Energy Saving Trust notes that eCargo bikes can have lower running costs and may use shorter routes in some settings, but that advantage depends on the actual route.
Thing is, a cheaper vehicle does not rescue a poorly matched route. Dense stops may suit a cargo bike. Long, low-density routes may require a different asset or a mixed fleet.
Rental pricing also needs local evidence. Weather, weekday demand, and peak inventory can change realized bookings and price. The Greenmoov rental pricing reference is a useful prompt to model those demand patterns rather than using one flat rate all year.
Stress-test the assumptions
Use three cases, but change more than the utilization cell.
| Case | Utilization | What to test |
|---|---|---|
| Conservative | 40% | Lower demand, more idle time, and ordinary downtime |
| Base | 50% | Current booking or route evidence |
| Higher use | 60% | Whether service capacity, labor, and charging can keep up |
Test the price, operating days, route miles, labor rate, maintenance reserve, payment fees, and battery replacement policy separately. A higher utilization rate can increase wear and labor, so revenue should not rise alone.
Published range is another sensitivity. The HSD P10's 76-mile figure is a useful starting point, not a route guarantee. Build a measured range column for the load and terrain your riders actually use. If the fleet has different batteries or models, give each one its own row.
A pilot should record bookings, completed drops, miles, charge sessions, repair tickets, idle hours, and cancellations. That data will quickly expose which assumptions were too generous.
Add compliance and battery safety costs
Rules and safety controls belong in the operating plan. They can create real costs through insurance, training, charging infrastructure, downtime, and documentation.
| Check | Evidence to collect | Possible model impact |
|---|---|---|
| Motor and vehicle classification | State, city, or local transport rules | Permits, route limits, or equipment changes |
| Commercial insurance | Written quote for the actual use | Fixed annual cost and coverage limits |
| Payload and equipment | Manufacturer specifications and service documents | Capacity, wear, and route suitability |
| Battery and charger | Model-specific manual and inspection process | Charging space, training, and downtime |
| Recall screening | Battery model, serial, and service notices | Quarantine or replacement costs |
| Service access | Parts availability, warranty terms, and labor rates | Repair time and maintenance reserve |
Jurisdiction matters. Fleet News reports that UK e-cargo bike motors must be limited to 250 watts and provide assistance up to 15.5 mph. That is not a universal US rule. US requirements vary by state and city, so check the rules for the places where the fleet will operate.
If a supplier mentions EN 17860 compliance, request the exact standard, scope, and supporting documentation. Do not assume that every cargo e-bike meets the same cargo, frame, or battery requirements.
Battery procedures also vary by model and battery design. Follow the manufacturer's directions for charging, storage, inspection, water exposure, and damaged batteries. Do not copy a generic fleet procedure without checking the manual.
If your fleet uses Rad Power Bikes, review the CPSC warning about certain Rad e-bike batteries. The warning identifies battery model numbers HL-RP-S1304, RAD-S1304Y, and RP-1304, and reports 31 fires, including 12 reports of property damage totaling about $734,500. It concerns specific batteries sold with or as replacements for listed models, not every e-bike battery.
Build the spreadsheet in seven passes
- Create one row for each bike, battery configuration, and service type. Do not average different models into one charging or range assumption.
- Set the currency, operating period, operating days, and primary billable unit.
- Enter purchase invoices, insurance quotes, local electricity rates, labor policy, service records, and storage costs.
- Mark every line as fixed, variable, or mixed. Decide whether the sheet measures cash payback, annual operating cost, or both.
- Calculate available capacity, expected utilization, annual revenue, variable costs, contribution, and break-even units.
- Run conservative, base, and higher-use cases. Change weather, downtime, pricing, route miles, and maintenance along with utilization.
- Replace estimates with pilot data. Update the model after actual bookings, miles, charge sessions, repairs, and idle time are available.
Common break-even questions
Is 40% utilization too low?
Not necessarily. It may be workable if pricing and contribution are strong, while 60% may still lose money if labor, repairs, or downtime are high. Use 40%, 50%, and 60% as planning cases until your own records show a stable pattern.
Should I use the published range in the calculator?
Use it to start the model, then replace it with measured route performance. Load, hills, temperature, tire pressure, battery age, and riding behavior can all change the result.
Should purchase price and depreciation both appear?
Use the purchase price for a first-year cash-payback view. Use depreciation or a replacement reserve for an annual operating view. Counting both for the same period overstates cost.
Can I use the GBP 342 benchmark in a US forecast?
Use it only as a UK reference point. It covers a specific one-year, 7,500-mile operating case and excludes purchase or funding costs. Keep US currency, labor, insurance, electricity, and maintenance inputs separate.
How should I compare a cargo e-bike with a van?
Compare the cost of completing the same work. Include labor, route time, parking, insurance, maintenance, energy, payload, downtime, and the number of deliveries completed.
The next practical step
Run the model for one bike before expanding the fleet. Record actual bookings, miles, charging, service time, labor, and idle hours, then replace every placeholder with observed data. To be honest, a fleet that only breaks even in the 60% case needs a demand and capacity review before another purchase.