The validity period for first-time applicants is up to two years. Employment Pass (EP) can be renewed subject to applications meeting the prevailing EP criteria.
Suggested Readings
Can I apply for an Employment Pass prior to incorporating my Singapore company? Why do I need to appoint a resident director?
Can I hold shares in other companies while I am on Employment Pass (EP)?
Can a shareholder of a company apply for an Employment Pass (EP)?
What is equity fundraising and what are the pros & cons?