The Taxi Workers Alliance wants the per-mile metered rate to increase from $2 a mile to $2.50.
They also want a 10-cent hike in the fare paid when cabs are stuck in traffic, from 40 cents per minute to 50 cents.
The proposal will be presented to the Taxi and Limousine Commission next week.
They cite rising gas prices as the reason for the fare hike.
The Taxi Workers Alliance is not asking for any other increases in cab fees.
TLC Chairman David Yassky told reporters after a City Council hearing Wednesday that the request would be considered.
