Operating Expense Ratios: Benchmarking Portfolio Efficiency

Operating Expense Ratio (OER) measures what percentage of gross rental income goes to operating costs. It's a critical benchmark for portfolio efficiency.

Industry Standards

In the UK, professional landlords typically run at 25-30% OER. This includes:

• Letting agent fees (8-12%)
• Maintenance & repairs (10-15%)
• Insurance (2-3%)
• Safety certificates & compliance (1-2%)
• Accountancy (1%)

If your OER consistently exceeds 35%, investigate cost drivers. Below 20% may indicate deferred maintenance or undervalued self-management time.

Why It Matters

Lower OER = higher net yield. A 5-point improvement in OER on a £500k portfolio adds £25,000 to annual net income. Track OER by property and by market to identify inefficiencies.