Switch energy supplier after moving house UK
A step-by-step UK guide to taking meter readings, avoiding being billed for the previous occupier, and switching to a better deal once you’ve moved. Includes timelines, common pitfalls, and a quick quote form.
- What to do on move-in day (readings, photos, supplier contact)
- When you can switch, and when it’s smarter to wait
- Costs to watch for: exit fees, debt blocks, meter types and prepay
Estimates only. Availability, prices and eligibility vary by postcode, meter type and payment method. Always take move-in readings.
Fast answer (UK)
You can switch energy supplier after moving house UK once the new home’s supply is in your name and you have your move-in meter readings (often within the first 24–48 hours). First, take readings and contact the existing supplier to open your account, then compare and switch; the new supplier handles the changeover.
Do this first
- Take gas + electricity meter readings (and photos)
- Find the current supplier (if unknown)
- Open an account so billing starts from your reading
Then compare
- Check payment method (direct debit / prepay)
- Confirm meter type (standard / smart / economy 7)
- Switch once details match the property
Avoid common problems
- Don’t ignore “current occupier” letters
- Don’t top up an unknown prepay meter without checking
- Don’t assume the previous tariff transfers to you
Key caveat: you usually can’t keep the previous occupier’s deal. When you move in, you’re typically placed on the supplier’s default/out-of-contract rate until you choose a tariff or switch.
What to do when you move in (then switch)
The safest way to switch after a move is to treat it as two mini-tasks: (1) make sure you’re billed only from your move-in reading, then (2) compare and switch to the tariff that fits how the home uses energy.
- On move-in day: take meter readings (and photos).
Get electricity readings (and gas if you have it). For smart meters, record what the meter itself shows (not just the in-home display). - Find out who currently supplies the property.
If the agent/landlord doesn’t know, use official lookup services: Ofgem guidance on finding your supplier. - Contact the current supplier to set up your account.
Give your move-in date, readings, and forwarding address for the previous property. This helps prevent being billed for the previous occupier. - Check what you’ve been put on.
You’ll often start on a default/out-of-contract tariff. Ask about payment options (direct debit, receipt of bill, prepay) and whether there are any meter-specific restrictions. - Compare and apply to switch.
Use your postcode and usage estimate to compare. Your new supplier normally manages the switch and tells the old supplier. - Keep records until the first bill is correct.
Keep photos of readings and any emails/letters. If the opening read is wrong, you can dispute it with evidence.
Renting? You can usually choose your supplier unless your tenancy includes bills. If bills are included, you typically can’t switch, but you can still ask how billing is calculated and what’s covered.
How long does switching take in the UK?
- Account set-up: can be same day once you contact the existing supplier and provide readings.
- Switch completion: timing varies by supplier and circumstances, but many straightforward switches complete within a few working days.
- Cooling-off: domestic energy switches have a cooling-off period where you can change your mind (your new supplier will explain the dates).
If there’s an issue (meter details mismatch, address format problems, debt on a prepay meter), switching can take longer.
Compare energy for your new home
Get options based on your postcode, meter type and payment method. No supplier-specific claims here—your quote shows what’s available right now.
Quick checks before you switch
- Meter type: standard, smart, Economy 7/10, or prepay.
- Fuel: electricity only, gas only, or dual fuel.
- Payment: direct debit often has the widest choice; prepay can be more limited.
- Address details: flat numbers and new builds can cause mismatches—use exact Royal Mail format if possible.
- Existing debt: debt linked to the meter can affect switching in some cases (especially prepay).
- Timing: if you’re moving again soon, consider whether a flexible tariff suits you better.
Should you switch now, or wait?
There isn’t one “right” answer after a house move. The best choice depends on whether you need the certainty of a fixed price, how long you’ll stay, and whether your meter/payment setup limits your options.
| Option | Who it suits | Pros | Watch-outs |
|---|---|---|---|
| Switch immediately | You’ve moved in for the long term and want to get off a default tariff quickly. | Potentially lower ongoing costs; you take control early. | If your opening read is wrong, you may need to resolve billing across two suppliers. |
| Wait until first bill is correct | You’re unsure about meter details, or the property has a complex setup (e.g. Economy 7). | Reduces admin risk; you confirm the supplier has your details right. | You may pay more than necessary for a few weeks if the default tariff is higher. |
| Choose flexible/short commitment | You might move again, or prefer fewer penalties. | Typically easier to leave; less risk if circumstances change. | Rates can change; fixed deals (where available) may offer more certainty. |
| Stay with current supplier but change tariff | You want minimal disruption or have a prepay setup to sort out first. | Can be quicker than a full switch; keeps billing in one place. | You may not see the widest market options without comparing. |
Decision checklist (quick)
- Switch now if:
- You have clear move-in readings, you’ll stay put for 12+ months, and you’re on a default/out-of-contract rate.
- Consider waiting if:
- It’s a new build/flat with address issues, you’re missing a gas meter serial, or you suspect the opening read is wrong.
- Get extra help if:
- You’re on prepay and the meter shows debt, or you’re being chased for a previous occupier’s balance.
Two realistic move-in scenarios (with numbers)
These examples show the shape of the decision. They are estimates and don’t use live tariff rates.
- Scenario A: family home, switch quickly
Assumptions: you move into a 3-bed house; combined use ~3,100 kWh electricity + ~12,000 kWh gas/year; you’re on a default tariff for 3 weeks while unpacking. If a cheaper tariff is available, switching 3 weeks earlier could reduce costs by roughly 3/52 of the annual difference (e.g. if the annual difference were £260, that’s about £15 over 3 weeks). - Scenario B: flat with Economy 7, wait to confirm setup
Assumptions: you have Economy 7 with storage heaters; electricity use ~2,500 kWh/year with a high night-time share; you’re unsure whether the meter is set up correctly. Waiting for the first correct bill may help you avoid picking a tariff that prices day/night badly for your pattern—potentially worth more than switching a couple of weeks sooner.
How to use these: focus on (1) your likely length of stay, (2) the confidence you have in meter details, and (3) whether you’re temporarily on an expensive default rate.
Costs, exclusions and common pitfalls (UK)
Most suppliers don’t charge you to switch, but moving house adds a few specific risks. These are the issues that most often cause incorrect bills, delayed switches, or surprise charges.
Exit fees (old property)
If you’re leaving a fixed deal at your old address, there may be an exit fee. Some contracts waive fees near the end date, others don’t. Check your final statement before cancelling direct debit.
Previous occupier debt
You’re not responsible for someone else’s debt, but you may need to prove your move-in date. Keep tenancy completion/tenancy agreement, and your meter photos. Citizens Advice explains what to do if you’re chased for a previous occupier’s bill.
Prepay meters
If the property has prepay, the meter may recover standing charges and/or any configured debt through top-ups. Before you top up heavily, confirm the account is yours and ask the supplier to check the meter configuration.
Meter details that can block or delay a switch
- Address mismatch: common in flats and new builds.
- Wrong meter serial number (MSN): check the number printed on the meter.
- Economy 7 setup: make sure you’re comparing like-for-like (day/night rates).
- Smart meter comms: smart features can vary; you can still switch, but functionality may differ.
Billing pitfalls (and how to avoid them)
- Estimated opening read: give your reading immediately and keep a dated photo.
- Mixing up meters: in flats, ensure you read the meter labelled for your flat.
- Direct debit confusion: don’t cancel payment for your new home until the final account is settled.
- Ignoring letters: “to the occupier” mail may still contain important supply info.
If you can’t find your supplier: start with Ofgem’s official guidance and lookup routes. This is safer than guessing and can prevent delays to your first accurate bill.
FAQs: switching energy supplier after moving house (UK)
Can I switch energy supplier immediately after moving in?
Usually yes—but first make sure the supply is registered to you with the current supplier and you’ve submitted your move-in meter readings. That creates a clean start point so you’re billed from the right date before the switch completes.
Do I have to stay with the previous occupier’s supplier?
No. In most UK homes you can choose your supplier, unless your rent includes bills or there’s a specific agreement in place. You’ll normally start on the existing supplier’s default tariff, then you can switch.
How do I find out who supplies my new home?
Ask the letting agent/landlord first. If that fails, use Ofgem’s guidance and official lookup routes to identify your gas and electricity supplier for the address.
What meter readings do I need when I move in?
Take an opening reading for each meter at the property (electricity, and gas if present). Photograph the reading and the meter serial number. For smart meters, use the meter’s display rather than relying only on the in-home display.
Can I switch if I have a prepayment (prepay) meter?
Often yes, but options can be more limited and some switches take longer. If the meter shows debt or you suspect it’s set to recover a previous occupier’s balance, contact the current supplier before switching and keep evidence of your move-in date.
Could I be charged an exit fee when switching after moving?
Potentially, but it usually relates to your old property’s contract if you leave a fixed deal early. The new home’s existing supplier typically won’t charge you an “exit fee” just for moving in, but always check any terms you agree to.
What if my first bill is wrong after I move in?
Raise it with the supplier straight away and provide your move-in date and dated photos of the meter readings. Citizens Advice explains your rights and the steps to take if you can’t resolve a billing problem.
Does switching supplier affect my smart meter?
You can still switch, but smart features (like automatic readings or in-home display functionality) can vary by meter and supplier setup. If smart readings stop temporarily, you can submit manual readings while it’s resolved.
Trust, methodology and sources
Page ownership
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: July 2026
We update this page when UK switching rules, consumer guidance, or common supplier processes change.
How we assess this (our approach)
This guide is based on UK regulator and consumer-body guidance plus common switch journey steps across domestic suppliers.
- Assumptions: you’re switching a domestic supply in Great Britain; you can provide accurate opening readings; your address is correctly registered on the national databases.
- Limitations: we don’t publish live unit rates, standing charges, tariff names, or supplier-specific claims on this page because availability changes by postcode, meter type and time.
- What to do for exact figures: run a quote using your postcode and meter/payment preferences.
Sources (UK)
Note: energy market rules differ in Northern Ireland. If you’re in NI, confirm local switching processes with your supplier and consumer advice services.
Ready to switch at your new address?
Compare whole-of-market options using your postcode. It’s the quickest way to see what’s available for your meter type and payment method—without guessing.
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