Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Sengkang Int → Toa Payoh Int | 05:30 | 00:35 | 8–12 min | 8–12 min | 9–11 min | 11–15 min |
| Toa Payoh Int → Sengkang Int | 05:45 | 23:30 | 9–11 min | 8–12 min | 7–11 min | 11–14 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.