From the MTA website (www.mta.info)
Pay-Per-Ride MetroCard
Buy as many rides as you want from $4.50 to $80.
Put $8 or more on your card and receive a 15 percent bonus. For example, a $20 purchase gives you $23 on your card. 10 trips for the price of 9, with $.50 balance. Refill your card to use the balance.
You get an automatic free transfer between subway and bus, or between buses.
Unlimited Ride MetroCard
Buy an unlimited number of subway and bus rides for a fixed price. Choose from a 1-Day Fun Pass, a 7-Day, 14-Day, 30-Day, 7-Day Express Bus Plus, 30-Day Unlimited Ride MetroCard accepted on JFK AirTrain only, or a JFK-AirTrain 10-Trip MetroCard.
1-Day Fun Pass
Cost: $8.25, reduced fare not available
Good for unlimited subway and local bus rides from first use until 3 a.m. the following day. Sold at MetroCard Vending Machines and at neighborhood stores. Not available at station booths.
7-Day Unlimited Ride MetroCard
Cost: $27, reduced fare $13.50
Good for unlimited subway and local bus rides until midnight, 7 days from day of first use.
14-Day Unlimited Ride MetroCard
Cost: $51.50, reduced fare $25.75
Good for unlimited subway and local bus rides until midnight, 14 days from day of first use. This card is protected against loss of theft when purchased at a vending machine with a creditor debit/ATM card.
30-Day Unlimited Ride MetroCard
Cost: $89, reduced fare $44.50
Good for unlimited subway and local bus rides until midnight, 30 days from day of first use. This card is protected against loss of theft when purchased at a vending machine with a creditor debit/ATM card.