Electric cargo bike vs second car: the real cost in London
The like-for-like numbers behind the choice most London families are actually making: keep the second car, buy a cargo bike, or subscribe.
Running a car costs the average UK household about £317 a month (RAC) — roughly £3,800 a year — before London extras like resident parking and emissions charges. A family e-bike subscription is £125–£250 a month all-in, and buying a cargo bike outright is a £4,000–£7,000 upfront commitment. For short urban family trips, the bike wins on cost by a wide margin; the honest exceptions are listed below.
What does a second car really cost in London?
The RAC puts the average cost of simply running a car — insurance, fuel, servicing, tax and depreciation — at around £317 a month. That's the national average; London adds its own line items:
- Resident parking permits — priced per borough, and rising in many of them, with surcharges for more polluting cars.
- ULEZ — £12.50 per day if the car doesn't meet the emissions standard.
- Congestion charge — payable per day if you drive into the centre.
- Depreciation you don't see — a second car that mostly sits at the kerb loses value while doing very few useful miles.
The key detail for families: a second car mostly exists for a handful of short trips a day — the school run, the shop, an activity. Those are exactly the trips a cargo bike does door-to-gate, with no parking.
The three options, side by side
| Second car | Buying a cargo bike | Moon subscription | |
|---|---|---|---|
| Upfront | Purchase or finance deposit | £4,000–£7,000 | £0 (£50 deposit only with the optional waiver) |
| Monthly | ~£317 average running cost (RAC) | Servicing, insurance & parts on top of purchase | £125–£250 all-in |
| Insurance & theft risk | Compulsory insurance | Yours to arrange; cargo bikes are theft targets | GPS, heavy-duty lock and in-house recovery included; optional Damage & Excess Protection £20/mo (£50 excess) |
| Servicing | Garage bills | Your problem | Included, done in our workshop |
| ULEZ / congestion charge | Depends on the car | £0 | £0 |
| Parking at school | Circling + walking | Door to gate | Door to gate |
| Commitment | Ownership | £4k–£7k gamble on family life fitting a bike | Monthly rolling from a 1-month minimum, one week's notice to end |
Why not just buy the cargo bike?
If you already know cargo-bike life fits your family, buying can make sense long-term. The catch is the £4,000–£7,000 upfront before you know that — plus insurance, servicing and theft risk on you. A subscription is the cheap way to find out: all-in from £125 a month, and if it doesn't fit, you end it at a renewal with one week's notice. If it does, you'll know exactly which type of bike to buy — or you just keep subscribing and skip ownership admin entirely.
When does the car still win?
Honesty matters more than a tidy pitch: a cargo bike doesn't replace motorway trips, big airport runs or moving furniture. If your second car regularly does long out-of-town journeys, it's earning its keep. The question is narrower: for the daily short trips — drop-off, shop, park — is the second car worth ~£317 a month plus London extras, when £125–£250 covers them by bike? Many families keep the first car and replace only the second; that's where the saving is.
The bottom line
Replace a second car with a long-tail subscription at £210 a month and the RAC average says you free up roughly £1,300 a year — before parking permits and emissions charges, and before counting the time not spent circling for a space. Electric cargo bikes also need no licence, tax or registration, and if you're only carrying one child, an e-bike with a child seat costs £125 — and saves you closer to £2,300 a year.
Sources: RAC average car running cost (2026); Transport for London ULEZ daily charge. Subscription prices are our own, current at publication.
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