Credit Rating (Taiwan Ratings*)
| Year | Long-term | Short-term | Outlook |
|---|---|---|---|
| 2023 | twAA | twA-1+ | Negative |
| 2022 | twAA | twA-1+ | Stable |
| 2021 | twAA | twA-1+ | Stable |
| 2020 | twAA | twA-1+ | Stable |
| 2019 | twAA | twA-1+ | Negative |
| 2018 | twAA | twA-1+ | Stable |
| 2017 | twAA- | twA-1+ | Positive |
| 2016 | twAA- | twA-1+ | Stable |
| 2015 | twAA- | twA-1+ | Stable |
| 2014 | twAA- | twA-1+ | Stable |
| 2013 | twAA- | twA-1+ | Stable |
| 2012 | twAA- | twA-1+ | Negative |
| 2011 | twAA- | twA-1+ | Negative |
| 2010 | twAA- | twA-1+ | Stable |
| 2009 | twAA- | twA-1+ | Stable |
| 2008 | twAA | twA-1+ | Stable |
