What Is Unit Rate in UK Energy Bills?

If you're searching for answers, you're likely facing a higher-than-expected bill. This guide explains the most common causes in the UK and what you should check immediately.

Main reasons

• Estimated readings instead of actual reads
• Standing charge changes
• Tariff expiry or rate increase
• Seasonal usage spikes

What to check in 2 minutes

• Compare unit rate (p/kWh)
• Check standing charge per day
• Verify billing period dates
• Confirm meter readings match your photos

Quick calculation

Use our kWh to cost calculator to sanity‑check your usage cost.

If something looks wrong

Contact your supplier and request a full reading history and tariff confirmation. Keep written records.

Updated 2026-02-18