How do surges apply when there are multiple passengers?
How does Surge Pricing or Prime Time work on UberPool or Lyft Line? (The carpooling options)
The Guru Take
Determined on the First Pickup
Unfortunately, the surge pricing that was triggered at the time of the first pickup will apply to all passengers that join the ride. Lyft and Uber's official comments below:
(Lyft) Q: Do I still get Prime Time for Line rides?
A: Yes. If Prime Time is in effect for your first pickup, you'll receive that rate for the entire trip.
(Uber) Q: How does surge work?
A: Surge on uberPOOL always matches surge on uberX. If you pick up multiple riders at different surge multiples then the average of the surge multiples will apply to your fare.