| 1st dan to 2nd dan | 1½ years minimum then |
| 2nd dan to 3rd dan | 2½ years minimum then |
| 3rd dan to 4th dan | 3½ years minimum then |
| 4th dan to 5th dan | 4½ years minimum then |
| 5th dan to 6th dan | 5½ years minimum then |
| 6th dan to 7th dan | 6½ years minimum then |
| 7th dan to 8th dan | 7½ years minimum then |
| 8th dan to 9th dan | 8½ years minimum |
10th dan is awarded to the most senior student after the death of his Grand Master. Unfortunately many of Choi’s students claim to be the most suitable, thus the dissolvent of the ONE Hapkido style and the evolvement of many Grand Masters and different styles.