Abstract: Apprentices and trainees undertake vocational education and training through a contract of training, which is a formal contract between an employer and an apprentice or trainee. This publication reports completion rates for apprentices and trainees who commenced their apprenticeship or traineeship between 1995 and 1999, and attrition rates for more recent commencements. For apprentices and trainees commencing in 1999, the completion rate was 52% for those on their original contract, rising to 55% after taking into account those who had recommenced training for the same qualification with a different employer, and reaching 60% after taking into account those who had changed both qualification and employer. Completion rates have declined for traditional apprentices from 71% for the cohort of 1995 to 60% for the cohort of 1999 (same trade but different employer to that of their original contract). Completion rates have increased for those who were not traditional apprentices from 47% for the cohort of 1995 to 52% for the cohort of 1999 (same trade but different employer to that of their original contract). Completion rates reflect the economy-wide pattern of labour market mobility. The age group with the lowest completion rates is the 20- to 24-year age group, which is also the most job- mobile age group. Occupations such as sales and service workers, which exhibit high rates of labour mobility, also tend to have low completion rates. In more recent years, attrition rates in the first year of an apprenticeship or traineeship have fallen, suggesting that completion rates may be on the increase.