One Bad Tenant Can Cost You £15,000+ One bad tenant can cost you £15,000+ and destroy your portfolio. Here's how to spot them before they move in. Your tenant screening process is the most important decision you'll make as a landlord. Yet most landlords spend more time choosing a coffee maker than screening tenants. The difference between a reliable tenant who pays on time and a problem tenant who doesn't is often discovered in the first 10 minutes of screening. But most land