Pub company Scottish & Newcastle Retail says there is a direct link between the number of trained staff and profit levels in its pubs.
Research among 200 employees has shown:
Growth is 4.5% higher in pubs with more than 60% qualified staff, compared with those where less than 20% of employees have NVQs.
Pubs with a large number of NVQ-trained staff are on average £350 further ahead of their weekly sales targets than those with a smaller number of trained employees.
The year-on-year increase in trading profits of pubs with a high level of NVQs is on average 10.5% higher than pubs with low NVQ activity.
The company says NVQs enable bar staff to "recognise the importance of their jobs".