The increases, ranging from 30 cents to 60 cents, come as transport operators are feeling the pinch from rising fuel costs.

New fares on the 11 services will cost $3.30 to $3.60, up from $2.70 to $3 previously.

These services serve residents in areas like Jurong, Clementi, Yio Chu Kang, Toa Payoh, Pasir Ris and Bedok.

They each run one trip during the weekday morning peak hour, ferrying commuters from the heartland to the Central Business District.

The fare increases come on the back of higher electricity and fuel costs for operators. SBS said these have gone up by more than 50 per cent in the first quarter of this year, compared to the same period last year.

The 11 routes that will see fares go up are: premium services 532, 533, 534, 535, 536, 538, 539, 542, 543, 544 and 545.

Besides the fare increases, SBS will also cancel six premium bus services starting from Monday because of low demand.

These are: premium services 537 and 540, which serve Jurong West and Yuan Ching Road respectively, and CityShopper services 551, 575, 577 and 580, which ferry shoppers from the heartland to town.

Surging diesel prices have also hit private bus operators, some of which plan to charge higher fares on their premium services.

There are currently more than 70 premium bus services running in Singapore, and half of these are operated by SBS.