 There are two 24-hour services for which there is no N equivalent and daytime fares are charged all day 

Apart from some tourist buses, all bus services in Dublin are one-person operated, and daytime fares are determined by the number of fare stages travelled through — fares are payable in coin and only the exact fare is acceptable — if passengers overpay they will not receive change.A cheaper alternative to cash is a Leap card loaded with a cash balance or a weekly or other pass.This can be bought from Dublin Bus or its agents.