Changes That Change the Price: Adding Passengers, Bags or a Child Seat

In each case, the reason is the same: the fixed price you were quoted was for a specific set of things, and one of those things has genuinely changed. We re-quote the difference and you're told the new figure before it's charged — never adjusted after the fact without your knowledge.

• Adding a child seat request that wasn't in the original booking
• Needing a bigger vehicle category because passengers or luggage grew beyond the original count
• Changing the pickup or drop-off address to a different route

These are all details about the same trip you already booked, not a different trip. Add your flight number the day before departure, or a note about which entrance to use the morning of — none of it reopens the price.

• Adding or updating your flight number
• Editing the notes field — a door code, a landmark, an oversized item you're now confirming fits
• Changing the pickup time on the same day and route, subject to a car being available

If a change means the new price is higher, you pay the difference before it's confirmed — never a surprise charge after the ride. If it's lower — say you drop to a smaller category — the difference is refunded to the same payment method. Either way, you see the new figure and agree to it before anything changes on your booking.

If you already expect extra bags, an extra passenger or a child seat, the simplest route is to book the right category from the start rather than adjust later — it's one less step, and it means the price shown at booking is already the final one. Where you genuinely can't know in advance, changing it later is straightforward; it just isn't free if what you're asking for has genuinely grown.