Bills and payments
Understanding your Octopus Energy bill
What each part of an Octopus bill means: unit rates, standing charges, estimated and actual readings, VAT and your account balance.
Edited by Rob Gibbs. Published: . Guidance reviewed: .
Short answer
An Octopus bill is two charges for each fuel: the energy you used (kWh multiplied by the unit rate) and a fixed daily standing charge, with VAT on top. It also shows whether each reading was actual or estimated, and your account balance after payments. Checking those last two lines explains most surprises.
The two charges
The unit rate is what you pay for each kWh you use. On a smart tariff there can be several rates, for example off-peak and peak, or a different price for each half hour on Agile.
The standing charge is a fixed amount per day for being connected, charged whether or not you use any energy. It varies by region and meter type, and can be a large share of the bill for low-use homes.
Actual or estimated readings
Each reading on the bill is marked as actual, from your smart meter or a reading you sent, or as estimated. A bill built on estimates can be well off. The next actual reading corrects it, which is why a bill sometimes jumps up or down unexpectedly.
Bill versus balance
The bill covers the energy used in that period. The account balance is everything you have paid minus everything you have been charged so far. If your Direct Debit is higher than your use, the balance builds up as credit; if it is lower, as debt. The two are related but they are not the same number.
A quick checklist when a bill looks wrong
Work through these before contacting Octopus:
- Are the readings actual or estimated?
- On an Economy 7 meter, are the day and night readings the right way round?
- Did a price change or tariff change fall within the period?
- Does the bill cover more days than usual?
- Is the standing charge the one for your region and meter type?
Questions people ask
Why do I pay a standing charge if I used no energy?
The standing charge covers the cost of keeping your home connected and supplied, so it applies every day regardless of usage.
Why did my bill go up when my usage did not?
Check for estimated readings being corrected, a price change part-way through the period, or a longer billing period.
Tariffs in this guide
Related guides
- Economy 7 or single rate: which is cheaper?When Economy 7 beats a single-rate tariff, the night share that decides it, and how to check with today’s Octopus rates for your region.
- Can you refuse a smart meter?Whether you can say no to a smart meter, what changes when an old meter must be replaced, and what you give up without one.
- Is Agile Octopus actually cheaper?When Agile Octopus beats a standard tariff, why the answer depends on when you use power, and how to check with your own half-hourly data.
- How Octopus Energy Direct Debit payments are worked outHow Octopus sets your monthly Direct Debit, why it reviews it, and how to change the amount or date without building up debt.
- Why the Octopus app and your bill do not matchCommon reasons the usage or cost shown in the Octopus app differs from your bill, and how to tell which figure to trust.
- Charging a company EV at home on an Octopus tariffWhat to sort out when you charge a company or salary-sacrifice EV at home on Octopus Go or Intelligent Go: records, reimbursement and the whole-home cost.
Primary sources
- Domestic energy supply terms and conditions — Octopus Energy; checked 2026-08-24. General domestic tariff, meter, pricing, switching and referral terms.
- Energy price cap and standing charges explained — Ofgem; checked 2026-08-24. What the cap covers, how it is calculated, and why it is not a household bill limit.
- Energy credit and debit explained — Octopus Energy; checked 2026-10-30. What account credit and debit mean and how to request a credit refund.