How long does an ERP implementation take?

A typical mid-market ERP implementation takes 6-18 months from kick-off to go-live. Smaller, out-of-the-box deployments can take 3-6 months. Complex implementations with heavy customization, data migration, or integrations can take 18-24 months or more. Most implementation overruns are caused by unclear requirements, data quality problems, or insufficient internal project resources.