Can I switch energy supplier with a smart meter in the UK?

Yes—most UK homes can switch supplier with a smart meter. The key is knowing whether your meter will stay “smart” after the switch, and whether you’re on PAYG or a complex tariff. This guide explains exactly what to expect and how to switch smoothly.

  • Switching is allowed with SMETS1 and SMETS2 meters (your meter type affects what happens next).
  • In many cases the meter keeps sending readings automatically; if not, it may temporarily act like a standard meter.
  • Prepayment smart meters can switch too, but you’ll need to check top-up method, debt settings and emergency credit.
Get your energy quote How switching works with smart meters

Prices and eligibility vary by region, payment method and meter setup. We’ll explain the common exceptions and what to check before you apply.

Fast answer: yes, you can usually switch

In the UK, having a smart meter doesn’t stop you switching. What changes is what happens to the “smart” features (automatic readings, in-home display updates, remote top-ups for PAYG) after you move supplier.

Best case

Your smart meter stays fully smart. Your new supplier gets readings automatically and your bills stay accurate.

Common case

You can switch, but there’s a temporary “dumb mode” period where you may need to submit manual readings.

Extra checks needed

Prepayment smart meters, Economy 7/10, heat pumps or EV tariffs may have extra requirements to keep your set-up working.

Quick check: If your smart meter is SMETS2, it’s more likely to stay smart across suppliers. If it’s SMETS1, it may or may not (it depends whether it’s enrolled in the national smart meter network).

How switching works with a smart meter (step-by-step)

  1. Get your details ready: postcode, current supplier, and your MPAN (electricity) / MPRN (gas) if you have them (they help match your supply point accurately).
  2. Choose a tariff that matches your set-up: standard credit vs direct debit vs prepayment; single-rate vs Economy 7/10; any EV/heat pump requirements.
  3. Apply and pass checks: some suppliers run credit checks for pay-monthly tariffs. If you’re in debt, you can still switch in many situations, but there are rules (especially for prepayment).
  4. Switch date and opening reading: your meter should provide an opening reading. If the smart link isn’t active, you may be asked to submit it manually.
  5. After the switch: check your first bill, confirm the opening read is correct, and monitor whether your smart features (automatic readings / IHD / PAYG top-ups) are working as expected.

Important: Under Ofgem rules, your energy supply should continue during a switch. If anything looks wrong (e.g., billing gaps), contact the new supplier first and keep photos of meter readings as evidence.

Smart meter types: SMETS1 vs SMETS2 (what it means for switching)

SMETS2
Designed to work across suppliers through the national smart meter network (DCC). Typically the smoothest experience when switching.
SMETS1
Earlier smart meters. Many are now enrolled to the national network, but some may temporarily lose smart functions after switching. You can still switch—you may just need to submit manual readings for a period.

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What happens to your smart meter when you switch?

This table covers typical outcomes. Your exact experience depends on meter model, communications signal, and the supplier’s systems.

Your set-up Can you switch? What usually happens after What to check before applying
SMETS2 credit meter (direct debit / pay on receipt) Usually yes Often stays smart; readings continue automatically Any exit fees; tariff end date; ensure direct debit details are up to date
SMETS1 credit meter Yes May stay smart or may need manual readings for a period Ask whether the meter is enrolled in the national network; take a photo of readings on switch day
Smart prepayment (PAYG) Often yes, but more checks Top-up method may change; smart features may vary; debt settings can carry over Emergency credit; friendly hours; existing debt; where/how you top up
Economy 7/10 or complex time-of-use Yes, but tariff must match Rate times should remain correct; billing needs the right register setup Confirm you’ll be billed on the correct registers; keep opening readings for each register
Heat pump / EV smart tariffs Usually yes May require half-hourly readings; app-based controls vary by supplier Eligibility criteria; whether the tariff requires smart meter data sharing / half-hourly settlement

Decision checklist (quick)

  • Know your payment type: direct debit / credit / prepayment.
  • Know your meter type: SMETS1 or SMETS2 (if unsure, your supplier can confirm).
  • Take readings/photos on switch day (gas + electricity, all registers).
  • Check exit fees and whether you’re in a fixed term.
  • If PAYG: confirm top-up method and any outstanding debt rules.

Who switching with a smart meter suits

  • You want more accurate bills (fewer estimates) and easier meter readings.
  • You’re out of contract or your exit fee is low.
  • You’re willing to submit manual readings temporarily if smart features pause.

Who may need extra care

  • PAYG with active debt repayments on the meter.
  • Economy 7/10 or multiple registers where billing errors can happen if set up wrong.
  • Homes relying on a specific smart tariff that needs half-hourly data or a supplier app.

Two realistic switching scenarios (with numbers)

Scenario A: SMETS2, pay monthly, smooth switch

Assumptions: dual fuel; typical home; monthly direct debit; no exit fees; smart meter stays connected so opening read is automatic.

  • Old tariff estimated annual cost: £1,680
  • New tariff estimated annual cost: £1,560
  • Estimated difference: £120/year (about £10/month)

Illustrative only. Estimates depend on usage (kWh), region, unit rates/standing charges, and tariff terms.

Scenario B: SMETS1, smart features pause, manual reads needed

Assumptions: electricity-only; SMETS1 not fully interoperable at switch; you submit manual readings for 2 months; no supply interruption.

  • Old tariff estimated annual cost: £1,050
  • New tariff estimated annual cost: £990
  • Estimated difference: £60/year

If the opening reading is wrong, it can cause billing disputes. Photos of readings on switch day reduce the risk.

Costs, exclusions and common pitfalls (UK-specific)

Switching supplier is usually straightforward, but these are the issues we see most often with smart meters—especially where billing and PAYG are involved.

1) Exit fees on fixed tariffs

Some fixed deals charge an exit fee if you leave early. Check your current tariff end date and the fee amount before applying.

2) “Dumb mode” confusion

If smart readings stop temporarily, bills can revert to estimates unless you provide readings. Set a reminder to submit readings until it’s resolved.

3) Prepayment debt rules

If you owe money on a prepayment meter, repayment settings may continue. Switching options may be limited depending on the amount and circumstances.

Other exclusions to watch

  • Complex meter set-ups: multiple registers, related heating controls, or older Economy 10 arrangements.
  • New builds / address mismatches: MPAN/MPRN records may need correcting before a switch completes.
  • Tenants: you can usually switch if you pay the bill, but not if energy is included in rent or the landlord supplies it.
  • Smart in-home display (IHD): it may not update immediately (or at all) after a switch; that doesn’t stop your supply working.

How to protect yourself (best practice)

  • Take clear photos of each meter/register on switch day.
  • Keep emails/letters showing your switch date and tariff start.
  • Check the opening reading on your first new bill.
  • If anything’s off, raise it quickly—billing is easier to fix early.

Caveat: We can’t guarantee a meter will keep smart functions after switching because interoperability depends on the national network and supplier systems at the time of switch.

FAQs

Will my smart meter stop working if I switch?

Your energy supply won’t stop. What can change is whether your meter keeps sending readings automatically. If it temporarily loses smart functions, you can still be billed—you may just need to provide manual readings until it reconnects.

How do I find out if I have a SMETS1 or SMETS2 meter?

Your current supplier can confirm. Sometimes the meter display/menu or installation paperwork indicates the standard, but the most reliable route is asking your supplier (or checking your online account documentation).

Can I switch if I’m on a smart prepayment meter (PAYG)?

Often, yes. You’ll need to check whether the new supplier supports your PAYG arrangement, how you’ll top up (app, PayPoint/Post Office), and whether any existing debt repayment settings apply.

Do I need to give meter readings if I have a smart meter?

Not always. If your meter is communicating with your supplier, readings are automatic. If you switch and the meter is temporarily not communicating, you may be asked to submit readings manually (especially for the opening read and early bills).

Can I switch if I’m in energy debt?

It depends on your payment method and circumstances. With prepayment meters, there are specific rules around switching with debt. If you’re in debt on a credit meter, suppliers may handle it differently. If you’re unsure, get advice before switching.

Will my in-home display (IHD) still work after switching?

Sometimes it will, sometimes it may show limited data or take time to update. Even if the IHD doesn’t update, your meter can still measure usage and you can still switch supplier.

How long does a switch take in the UK?

Switch times vary by supplier and circumstances. Many switches complete within a few working days, but issues like address/MPAN mismatches, complex meters, or PAYG set-ups can take longer.

Can my landlord stop me switching if I have a smart meter?

If you’re the bill payer, you can usually choose your supplier (smart meter or not). If energy is included in your rent, or the landlord is the named account holder, you generally can’t switch without their agreement.

Trust, methodology and sources

Page ownership

How we assess “can I switch with a smart meter?”

We answer this based on UK switching rules and how smart meters commonly behave across suppliers. We focus on the real user outcomes: whether you can switch, whether your smart features are likely to continue, and what you need to do to avoid billing problems.

  • Inputs considered: meter standard (SMETS1/SMETS2), payment method (credit vs PAYG), multi-register tariffs (e.g., Economy 7), common industry processes for opening/closing readings, and consumer advice guidance.
  • What we don’t do: we don’t promise your meter will stay smart after switching—interoperability can vary by meter model, signal quality and supplier systems at the time.
  • Scenario numbers: the example costs use simple annual comparisons to illustrate decision-making. They are not predictions and don’t include every tariff feature (e.g., cashback, bundles, or timed consumption shifts).

Sources (UK)

We update this page when UK switching processes or smart meter interoperability guidance changes materially.

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Updated on 14 Mar 2026