Switching to Octopus Energy: what happens from quote to first bill

The direct answer

Switching to Octopus Energy is an administrative change of who bills you for the gas and electricity you already use — it is not a physical reconnection. The same network delivers your energy through the same pipes and wires, so there is no supply interruption and no engineer visit for a standard domestic switch. What actually happens behind the scenes is a transfer of your supply point (identified by an MPAN for electricity and an MPRN for gas) from your old supplier's account to a new one, coordinated through industry systems and governed by Ofgem's switching rules. From the moment you confirm sign-up, a standard switch must complete within five working days.

Before you switch: read your current bill properly

A good switching decision depends on accurate information from your current account, not guesswork. Find a recent bill, your supplier's app or your online account and note down:

• Annual usage in kWh for electricity and, separately, for gas — not the cost, the kWh
• Your current tariff name and whether it is fixed, variable or price-capped (standard variable)
• The tariff's end date, if fixed, and any exit fee that applies before that date
• Your payment method: monthly Direct Debit, quarterly billing, or prepayment
• Your meter type: single-rate credit, Economy 7 (two-rate), smart, or prepayment
• Your MPAN (electricity) and MPRN (gas) — usually printed on your bill

Should you switch at all?

Two broad situations exist. If you are on a supplier's standard variable tariff, your unit rates and standing charges move with Ofgem's price cap every quarter, and there is normally no exit fee, so comparing against a fixed Octopus tariff is a straightforward like-for-like check of the live annual estimate. If you are already on a fixed tariff, the calculation needs one more step: does the saving from switching outweigh any exit fee for leaving early?

Most fixed tariffs also waive the exit fee inside the final 49 days of the contract, so check your end date before assuming a fee applies at all.

The switching timeline, step by step

1. Get a quote. If you want the referral credit, start from the referral link so the referral is attached from the outset — starting on a comparison site or Octopus's own homepage instead will not carry a referral through.
2. Choose a tariff. Compare the annual estimate, unit rates, standing charges, contract length, exit fees and any smart-meter requirement. See our Octopus tariffs guide for how the main tariff types differ.
3. Sign up. Provide your address, meter details (MPAN/MPRN if you have them to hand), contact details and a Direct Debit mandate.
4. 14-day cooling-off period. Domestic energy contracts agreed at a distance (online or by phone) carry a statutory 14-day cancellation right from the day after you sign up. Cancelling within this window also cancels any attached referral.
5. The switch is registered and completes. Under Ofgem's switching rules, once your sign-up is confirmed, a standard switch must complete within five working days. Many switches are scheduled to complete just after the cooling-off period ends, so the whole process typically feels like two to three weeks door to door.
6. Supply start date. This is the day your account with Octopus becomes live and your old supplier's account for that address closes.
7. Give opening readings. Submit meter readings on or close to supply start so both suppliers bill the correct period accurately, rather than estimating it.
8. Old supplier's final bill. Your previous supplier closes the account using your final readings and refunds any credit balance according to its own process.
9. First Direct Debit. Your first monthly payment is collected on the date set at sign-up, based on an estimate of your annual cost.
10. First statement. Your first bill or statement shows actual or estimated usage against what you have paid so far, and this is the trigger point after which referral credit is normally paid.

The Energy Switch Guarantee

The Energy Switch Guarantee is an industry commitment, underpinned by Ofgem's switching rules, that covers three things: your switch will complete within five working days once confirmed; you will experience no interruption to your gas or electricity supply during the process; and any credit balance owed to you by your old supplier will be refunded after the switch. It does not promise a particular price, service standard or that a switch cannot be objected to — it is a process guarantee, not a satisfaction guarantee.

Taking opening meter readings

Accurate opening readings are what stop your first bill from being based on an estimate.

• Single-rate meter: read the single row of digits before the decimal point, ignoring any red digits
• Economy 7 / two-rate meter: there are two readings, usually labelled 'Day'/'Normal' and 'Night'/'Low' — submit both
• Smart meter (in-home display or app): the reading is usually sent automatically, but check your Octopus account shows a reading close to your supply start date and submit manually if not
• Take a photo of the meter and readings as a record in case a dispute arises later

If you miss the reading window around supply start, Octopus will use an industry-estimated reading instead, which can be corrected later once you submit a genuine reading — but an estimate that is too high can inflate an early bill or Direct Debit review, so it is worth submitting your own reading as soon as you notice it has been missed.

Your old supplier's final bill and credit refund

After the switch completes, your old supplier calculates a final bill using the closing readings from switch day. If you were in credit — which is common if you pay by monthly Direct Debit and used less energy than your winter-weighted estimate assumed — that balance should be refunded to you, not simply left on a closed account. If the final bill looks wrong (for example it uses an estimated reading rather than the actual one you gave), contact the old supplier with your reading and, ideally, your photo evidence, and ask for the bill to be corrected before you accept it.

Direct Debit: how the amount is set and how to challenge it

Your monthly Direct Debit is an estimate of your annual cost divided by twelve, adjusted to build a small buffer for winter months when usage is higher. It is based on the usage figures you gave (or an industry average if you did not), and on the current unit rates and standing charges for your tariff. If the amount quoted looks high relative to your actual annual usage, check that the kWh figures on file match your real bills — a Direct Debit built on an inflated estimate is the single most common avoidable complaint about switching. You can ask Octopus to review the amount against your actual meter readings once you have a few months of real data, and most suppliers will adjust it up or down accordingly.

Smart meters: SMETS1, SMETS2 and switching

Smart meters installed under the government rollout come in two generations. SMETS1 meters, installed earlier, originally lost some smart functionality (reverting to manual-read mode) when the customer switched supplier, because each supplier ran its own system. Most SMETS1 meters have since been enrolled onto the national Data Communications Company network, which lets them keep working smartly across a switch. SMETS2 meters are supplier-agnostic by design and normally continue working as smart meters regardless of who supplies you. Some Octopus tariffs — particularly time-of-use or agile-style tariffs that bill by half-hourly rates — require a compatible smart meter sending regular readings, because a standard meter simply cannot record consumption by time of day.

What can go wrong, and how it is resolved

If a problem is not fixed to your satisfaction, put your complaint in writing to the supplier. If it remains unresolved after eight weeks, or the supplier issues a deadlock letter sooner confirming it cannot help further, you can refer the complaint free of charge to the Energy Ombudsman, whose decision is binding on the supplier if you accept it.

Special cases

Moving home

Moving into a new property is a "change of tenancy," not a switch, if the property is already supplied by Octopus — you inherit that supply rather than switching onto it, and referral credit typically does not apply in that scenario. If you want to take your existing Octopus tariff with you to a new address, tell Octopus before you move so it can set up supply at the new property under the same or an equivalent tariff.

Prepayment meters

Prepayment customers can switch, but rules are stricter around outstanding debt, and not every tariff is available on prepayment. Check debt thresholds with your current supplier before applying.

Tenants

If the energy account is in your name and you deal directly with the supplier, you can choose to switch. If your rent includes energy, the landlord is the account holder and the decision sits with them.

Park homes

Park home residents are sometimes supplied through the site owner's connection rather than having an individual domestic supply contract, in which case an individual switch to Octopus is not possible; check your specific arrangement first.

Economy 7

Two-rate meters need both day and night readings at every stage of a switch, and not every Octopus tariff supports Economy 7 — confirm compatibility before signing up.

EV owners and heat pumps

Households with an EV charger or heat pump often use enough off-peak or time-varying electricity that a time-of-use tariff can be worth comparing against a flat-rate deal, but these tariffs generally require a working smart meter to bill correctly.

Where the referral credit sits in this timeline

The referral link is what matters for the credit: it must be the route you use to start your quote, and the reference stays attached through sign-up and switch completion. The reward itself is paid once you are on supply and your first monthly Direct Debit has been successfully taken — not on the day the switch completes. For a full breakdown of the typical timing and what can delay it, see when the referral credit is paid, and check whether your situation qualifies at all in our referral eligibility guide.

First 90 days: post-switch checklist

• Week 1–2: confirm supply start date and submit opening meter readings
• Week 2–4: check your old supplier's final bill and chase any credit refund
• Week 4: confirm your first Direct Debit was collected successfully
• Around week 4 onward: check referral credit has appeared in your Octopus account balance
• Month 2–3: compare a real meter reading against your bill to check the Direct Debit estimate
• Ongoing: note your new tariff's end date (if fixed) so you can plan your next switch or renewal in good time

Common mistakes

• Guessing usage and then being surprised by the first bill
• Ignoring an exit fee on the current tariff that wipes out the saving
• Starting at a referral link but completing the switch on a comparison site
• Forgetting to submit opening readings, causing estimated bills
• Not chasing the old supplier for a credit refund
• Assuming a house move onto an existing Octopus supply is the same as a referral-eligible switch

No interruption to supply

Switching supplier is an administrative change to who bills you. There is no engineer visit, no gap in supply and no change to the network that delivers your energy. If anything ever does go wrong with supply itself — a power cut or gas leak, for example — the network operator, not your supplier, is the organisation that responds and restores it.

Cooling-off versus the switching window

These are two different things and are often confused. The cooling-off period is your right to change your mind after agreeing a contract, running for 14 days from the day after sign-up. The five-working-day switching requirement is a separate Ofgem rule about how quickly the transfer itself must be completed once it is confirmed. One protects your decision; the other governs the industry process.

Glossary

Choosing between tariff types is covered in the Octopus tariffs guide, and whether Octopus suits your household at all is covered in our Octopus Energy review. If you are switching mainly for the credit, read the current referral offer terms first.