Vehicle Extras Explained
Extras are optional add-ons a host offers with their car — things like a child seat, roof rack, or prepaid mileage package — priced by the host and added to your trip at checkout.
What counts as an extra
Extras are anything beyond the car itself that a host chooses to offer on their listing. Common examples:
- Child or booster seats
- Roof racks or cargo carriers
- Prepaid mileage packages (extra miles bundled at a set price, instead of paying per-mile overage)
- Prepaid fuel or charge packages
- Tire chains
- Other host-specific items or services
Not every host offers every extra — it's entirely up to what that host has chosen to list. Each listing has a cap of 10 extras, so you'll always see a manageable, specific list rather than a sprawling menu.
How extras are priced
Hosts set their own prices for each extra they offer. You'll see the price for each one on the vehicle detail page before you book, and you choose which ones you want as part of your booking flow — see Booking a Car: Step by Step.
Extras are billed at 100% pass-through to the host — the host gets what they charge for the extra. Carvia applies its normal 12% service fee to the extras total the same way it does to your trip price, rather than taking a separate cut on top. You can see exactly how extras factor into your total in Understanding Your Trip Price: Fees Explained.
How extras are billed and refunded
- At booking: the cost of any extras you select is added to your trip subtotal and included in your checkout total, upfront — no separate charge later.
- If you cancel: extras are refunded proportionally with the rest of your trip, following the same tier (Flexible, Moderate, or Strict) as your trip price. If your cancellation qualifies for a full refund of the trip price, your extras are refunded in full too; if it qualifies for a 50% refund, extras are refunded at 50% as well. See the Cancellation Policy for the full breakdown.
- If a host can't deliver an extra (for example, a child seat isn't actually in the car at pickup), let your host know through in-app messaging right away — if it can't be resolved, contact support and we'll sort out a refund for that extra.
A note on mileage extras specifically
Every trip includes a default mileage allowance (200 miles per day, though some hosts raise it), and going over that allowance is billed per-mile at a rate the host sets and discloses at booking. A prepaid mileage package is a way to bundle extra miles in ahead of time, often at a better rate than paying overage after the fact — worth considering if you know you'll be putting a lot of miles on the car.