Can I switch energy supplier if I’m in arrears (UK)?
Often, yes — but it depends on how much you owe, how you pay (credit, prepayment, or smart PAYG), and whether your current supplier blocks the switch. This guide explains the UK rules, what to do next, and when switching could make things worse.
- In many cases, you can switch if your debt is under a set threshold (or it can be moved to your new supplier).
- If you’re on a traditional prepayment meter and owe above the threshold, your supplier may stop the switch.
- If you’re struggling, you may be better off getting a repayment plan or debt support first — switching isn’t always the quickest fix.
Small print: Eligibility depends on your meter type, payment method, debt level and supplier policies. Any savings are estimated and tariffs/availability change.
Fast answer: yes sometimes — but arrears can block switching
In the UK, being in arrears doesn’t automatically stop you switching energy supplier. The main things that matter are:
How you pay
Credit (monthly direct debit/bill), prepayment meter, or smart PAYG. The rules and supplier options differ.
How much you owe
With prepayment meters, suppliers may block switching above a set debt threshold (unless the debt can be transferred).
Whether there’s a dispute
If you’re disputing the bill, you can still ask to switch — but settle the dispute path to avoid the debt escalating.
Key point: If you can switch, the debt doesn’t vanish. You’ll still owe your current supplier, or it may be transferred (in specific cases) and collected through your new prepayment setup.
Key takeaways (quick rules of thumb)
- Credit meters (pay monthly): you can usually switch, but you must still repay any arrears and you may need to clear a final bill.
- Traditional prepayment meters: switching may be blocked if your debt is above the industry threshold; if below, it may be transferred to the new supplier under the debt assignment process.
- Smart PAYG/prepay: some suppliers can support debt recovery in a more flexible way, but availability varies.
- If you’re behind because you can’t afford energy: ask for help first (repayment plan, emergency credit, priority services, grants) — switching alone may not reduce what you pay enough.
How switching works if you owe money (UK)
Switching is a market process: your new supplier takes over your meter point (electricity MPAN and/or gas MPRN). Arrears are a separate debt issue between you and your existing supplier — unless you’re eligible for debt transfer on prepayment.
Step-by-step: what typically happens
- You apply to switch (online or by phone). You’ll choose payment type and share your address and meter details.
- Switch checks happen in the background. With prepayment debt, your current supplier may object if the debt rules apply.
- You get a switch date (often within a few working days; timing can vary).
- Take meter readings (unless your smart meter sends them) so your final bill is accurate.
- Final bill and debt repayment. Any remaining debt is still owed to the old supplier unless it’s transferred under prepayment debt rules.
If your supplier blocks the switch: ask them to explain the reason in writing and what you can do (for example, reduce the arrears below the threshold, agree a repayment plan, or correct account errors).
When switching is usually possible (and when it’s not)
Usually possible
- Credit meter customers who owe money but are not on an enforced repayment arrangement that prevents switching.
- Prepayment customers whose debt is within the debt transfer threshold (so the balance can be assigned to the new supplier).
- Customers changing supplier after correcting an inaccurate bill (for example, after a meter reading dispute is resolved).
May be blocked or tricky
- Traditional prepayment meters with arrears above the threshold (your supplier can object to the switch).
- Situations where the account is in serious dispute or there’s evidence of tampering (needs specialist handling).
- Where your current supplier insists on steps first (such as verifying meter details, correcting address, or resolving a billing issue).
If you’re unsure what meter/payment type you have, check your bill/app or look at your meter: prepay meters usually require top-ups and show credit; smart PAYG is often managed through an app or online account.
Compare tariffs (whole-of-market) — with arrears in mind
Fill in a few details and we’ll show available options for your home. If you’re in arrears, we’ll still help you compare — and you can decide whether to switch now or sort repayment first.
Tip: If you’re on a prepayment meter and you know you’re in arrears, keep a note of the approximate balance. It helps when you speak to your current supplier about whether a switch can go through.
Switching in arrears: what changes by meter/payment type
This comparison is designed to help you decide your best next step. Exact thresholds, processes and acceptance vary by supplier and your circumstances.
| Your setup | Can you usually switch? | What happens to the arrears | Best next step |
|---|---|---|---|
| Credit meter (Direct Debit / on receipt of bill) | Often yes | You still owe your current supplier. They’ll issue a final bill; repayment plan may continue. | Ask for an affordable repayment plan and compare cheaper tariffs to reduce ongoing costs. |
| Traditional prepayment meter (key/card) | Depends on debt level | If eligible, debt may be transferred to the new supplier and collected via top-ups. If not eligible, the switch may be blocked. | Find out your arrears amount; ask if you qualify for debt transfer or need to reduce the debt first. |
| Smart PAYG / smart prepay | Often, but varies | Debt management may be more flexible (remote top-up/repayment settings). Transfer rules still apply depending on supplier/meter mode. | Ask your supplier what mode your smart meter is in (credit vs PAYG) and what switching options you have. |
| You’re disputing the bill amount | Possibly, but handle carefully | Debt may continue to show while the dispute is investigated; outcomes can adjust your balance. | Raise a formal complaint, give meter readings/evidence, and seek advice before switching if the balance looks wrong. |
Decision checklist: should you switch now?
Switching may suit you if…
- You can access a meaningfully cheaper tariff (or better terms) and you’re confident you can keep up with payments going forward.
- Your arrears are manageable and you’ve already agreed (or can agree) an affordable repayment plan.
- You’ve checked whether your meter/payment type allows switching with debt (especially for prepayment).
- You’re not relying on regular emergency credit and you won’t be left without supply during the change.
Switching may not suit you (yet) if…
- You’re on a traditional prepayment meter and your debt is above the threshold (the switch may be blocked).
- Your bill looks wrong (estimated readings, missing payments, incorrect meter details) and the dispute isn’t resolved.
- You’re in a vulnerable situation and need immediate support (Priority Services Register, hardship funds, breathing space advice).
- You’re considering switching mainly to “avoid” the debt — you’ll still be liable, and it can damage your options later.
Two realistic scenarios (with numbers)
Scenario A: credit meter arrears, switching still allowed
Assumptions (illustrative): A household is £240 in arrears on a credit meter. Current unit rates lead to an estimated £140/month going forward. A different tariff would be estimated at £125/month (same usage), and the supplier agrees a repayment plan of £20/month.
- Before switching: £140/month + (optional) arrears repayment
- After switching (example): £125/month ongoing energy + £20/month arrears repayment to the old supplier
- What this means: switching could reduce ongoing cost by ~£15/month, but you still need a plan to clear £240.
Caveat: Your actual bill depends on usage, tariff terms, standing charges and when rates change. If you miss the repayment plan, debt collection can still apply.
Scenario B: prepayment arrears, switch may be blocked
Assumptions (illustrative): A customer on a traditional prepayment meter owes £620 from past underpayments. They top up £60/week. The supplier sets a recovery rate of £8/week from top-ups (so £52/week is usable credit, before standing charges and usage).
- If the debt is above the allowed transfer threshold: the existing supplier may object to the switch.
- If switching is blocked: reducing the balance (even a one-off payment) might bring it within the threshold, or a repayment arrangement may be needed first.
- Impact on budget: debt recovery reduces usable credit from each top-up, which can increase the risk of self-disconnection.
If you’re struggling to keep the meter topped up: speak to your supplier about emergency/friendly credit, repayment rates, and hardship support. Switching may not be the fastest solution.
Costs, exclusions and common pitfalls (what to watch for)
Switching with arrears is mainly about avoiding surprises. These are the issues we most often see when households try to change supplier while owing money.
Final bill timing
You’ll normally get a final bill after you switch (based on readings). If readings are wrong or missing, the final balance can jump unexpectedly.
Exit fees (sometimes)
Some fixed tariffs have exit fees. If you’re in arrears, an exit fee can add to what you owe. Check your tariff terms before applying.
Debt doesn’t disappear
Switching supplier doesn’t wipe arrears. You may still pay the old supplier directly, or via top-ups if debt is transferred on prepay.
Common pitfall: switching during a billing dispute
If your balance is wrong (estimated reads, wrong meter, misapplied payments), switch only once you’ve documented evidence and raised it formally. Otherwise, the dispute can follow you for months.
Common pitfall: unaffordable repayment rates
Suppliers should consider what you can afford, but you may need to negotiate. If you’re on prepay, ask to review how much is taken from each top-up so you can maintain supply.
Safety note: If you’re at risk of being left without energy (self-disconnection) or you have health needs at home, contact your supplier urgently and ask about the Priority Services Register and immediate support options.
FAQs
- Will my current supplier stop me switching if I owe money?
- Sometimes. Credit meter customers can often switch, but prepayment customers may be blocked if arrears are above the relevant threshold. Ask your supplier to confirm the reason for any objection and what would allow the switch.
- If I switch, do I still have to pay the arrears?
- Yes. Switching doesn’t remove the debt. You’ll either repay your old supplier directly (common for credit meters) or, in some prepayment cases, the debt can be transferred and recovered through your top-ups.
- What is “debt assignment” for prepayment meters?
- It’s an industry process that can allow some prepayment customers with arrears below a set threshold to switch supplier and have the outstanding balance transferred to the new supplier. Exact rules and thresholds can change, and not all situations qualify.
- Can I switch if I’m on a fixed tariff with exit fees and I’m in arrears?
- Possibly, but exit fees can increase what you owe. Check your tariff terms or account, and factor the fee into your decision. If you’re switching to reduce ongoing costs, weigh the fee against the estimated monthly difference.
- Can a landlord stop me switching supplier if I pay the bills?
- If you are the named account holder and you pay the energy bills, you can usually choose the supplier. If energy is included in rent or the landlord is the account holder, the landlord may control the supplier choice. Always check your tenancy agreement and who is named on the bill.
- What if I think the arrears are wrong?
- Take photos of your meter reading(s), gather bills and payment evidence, and contact your supplier to raise a complaint. If you have a smart meter, check whether reads are being received. Consider getting independent help from Citizens Advice if it’s not resolved.
- Will switching affect my credit score?
- Switching itself usually won’t. However, missed payments, defaults, or debt collection activity related to your arrears may affect your credit record depending on how the supplier reports it. If you’re worried, ask your supplier how the arrears are being handled and keep to an agreed plan where possible.
- I’m struggling to top up my prepayment meter — should I switch or get help first?
- Get help first. Ask your supplier about emergency credit, friendly credit hours, a review of how much is taken for debt repayment, and hardship support. If you have vulnerabilities, ask about the Priority Services Register. Once your supply is stable, compare tariffs to reduce ongoing costs.
Trust, transparency and how we assess this
Page details
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: March 2026
Our approach (methodology)
We focus on UK consumer rules and supplier switching processes, and we prioritise practical decision support over blanket statements. We’ve included scenarios and a comparison table to show how outcomes change by meter type and arrears level.
Assumptions and limitations
- Thresholds and eligibility: Industry thresholds (especially for prepayment debt transfer) can change and can be applied differently depending on meter type, supplier systems and account status.
- Tariff availability: Not every tariff is available in every region or for every meter configuration (for example, some tariffs require smart meters or specific payment methods).
- Costs in examples: Scenario numbers are illustrative and do not predict your bill. Real costs depend on unit rates, standing charges, usage, and how debt repayment is structured.
- Vulnerability and support: If you have medical needs, children under 5, disability, or other vulnerabilities, suppliers may have additional duties and support pathways that affect the best next step.
Authoritative UK sources
- Ofgem (UK energy regulator) — guidance and consumer protections.
- Citizens Advice: energy problems and debt support — practical steps if you owe money or can’t pay.
- GOV.UK — benefits and support information that may help with affordability.
Note: We link to these sources to help you verify rules and find support. Supplier-specific policies and processes can still vary.
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