2008–09 National Twenty20 Cup
| Dates | 4 – 8 October 2008 |
|---|---|
| Administrator(s) | Pakistan Cricket Board |
| Cricket format | Twenty20 |
| Tournament format(s) | Round-robin and knockout |
| Host(s) | Lahore |
| Champions | Sialkot Stallions (3rd title) |
| Participants | 13 |
| Matches | 18 |
The 2008–09 RBS Twenty-20 Cup was the fourth season of the RBS Twenty-20 Cup in Pakistan, sponsored by Royal Bank of Scotland. It was held in Lahore from 4 to 8 October 2008. The Sialkot Stallions won their third overall and consecutive title by defeating the Karachi Dolphins in the final. As the winners, the Stallions qualified for the 2008 Champions League Twenty20, which was later cancelled.