Problems & fixes · Electricity and gas plans
What to do when your energy bill is much higher than expected
Last updated 25 October 2026 · 2 sources listed · Reading time about 3 minutes
Short answer
Start by separating three causes: an estimated or wrong meter reading, a change in rate or standing charge, or a genuine rise in consumption from a fault or new appliance. Compare actual readings against the bill, review the rate notices you received, then dispute in writing if needed and escalate to the ombudsman or regulator route if unresolved.
Who this is for: A household that has received a bill far above normal and needs to establish whether it is a billing error, a usage change or a rate change.
What to evaluate
Reading type on the bill
Estimated readings can overstate use and then correct sharply later.
How to check: Look for the letter or symbol that marks estimated versus actual readings.
Rate and standing charge history
A contract rollover or price notice may have changed what each unit costs.
How to check: Compare unit rate and daily charge against the previous statement and the original contract.
Usage compared with the prior year
Seasonal comparisons separate real use from billing errors.
How to check: Compare the same billing period one year earlier, adjusting for weather and occupancy.
Meter integrity
A faulty meter or misread register can inflate use.
How to check: Take your own reading, check that the serial number matches your meter, and ask for a test if you suspect a fault.
Hidden loads
A failing heating element, an always-on device or an immersion heater left on can double consumption.
How to check: Switch everything off and watch whether the meter still moves.
Back-billing rules
Some regulators limit how far back a supplier can charge for undercharged energy.
How to check: Search your regulator's rules on back-billing and ask the supplier which apply.
Comparison
| Cause | Sign | First step |
|---|---|---|
| Estimated reading | Estimated flag on bill and sudden catch-up | Submit an actual reading and request a re-bill |
| Rate or contract change | Unit rate differs from last bill | Check notices and contract end date, then compare plans |
| Faulty or misread meter | Consumption that does not match habits | Photograph the meter and request a meter test |
| Genuine usage increase | Seasonal or appliance-related jump | Audit heavy loads and review heating schedule |
Decision worksheet
Rate up to three options against this guide’s own criteria. It runs in your browser and saves only on this device. It is a thinking aid, not a recommendation.
1. Have you checked each criterion?
0 of 6 criteria checked.
2. Compare options (0 = fails or unknown, 3 = meets it well)
| Criterion | |||
|---|---|---|---|
| Reading type on the bill | |||
| Rate and standing charge history | |||
| Usage compared with the prior year | |||
| Meter integrity | |||
| Hidden loads | |||
| Back-billing rules | |||
| Total (max 18) | 0 | 0 | 0 |
Questions to ask before you commit
- Is each reading on this bill actual or estimated?
- What is the unit rate and standing charge, and when did they last change?
- Can you send a statement showing readings and dates?
- Is there any back-billing or adjustment included?
- Can you arrange a meter accuracy test, and what does it cost if it passes?
- What payment plan options exist while we investigate?
- Will you pause collection while a dispute is open?
- What is your complaint process and the deadline before it can go to an ombudsman?
Typical trade-offs
Pay the disputed amount while investigating
- Upside
- Avoids arrears and collection steps
- Downside
- You may have to wait for a refund
Withhold the disputed portion
- Upside
- Keeps cash while you resolve it
- Downside
- Risks late fees or disconnection steps depending on rules
Switch supplier mid-dispute
- Upside
- May fix future rates
- Downside
- Unresolved final-bill disputes can complicate the exit
Common mistakes
- Disputing by phone only; follow up in writing so there is a record.
- Ignoring the first sign that readings are estimated and letting them accumulate.
- Assuming the rate did not change because the plan name did not.
- Switching supplier before obtaining a final reading for the old one.
- Discarding earlier bills that you need to prove a pattern.
Related questions
How can I tell if a bill is estimated?
Look for a code or note beside the reading, often an E or the word estimated. Compare with your own meter display. If they differ, submit your actual reading through the supplier's portal or by phone and ask for a re-bill. Regular estimates indicate that the supplier cannot access the meter or you have not been submitting readings. A smart meter should reduce estimates, but only if it is communicating.
Can the supplier charge me for past under-billing?
Often yes, but many regulators restrict how far back and require the supplier to have given clear information. Some jurisdictions bar back-billing beyond a stated period when the error was the supplier's fault. Rules differ, so check your regulator and ask the supplier in writing which rule they apply. If they cannot explain it, escalate.
What if the meter seems to be running too fast?
Take readings at set intervals with all appliances off and see whether the register still advances. Photograph the serial number and display. Ask the supplier or network operator for a meter test; if the meter is found to be inaccurate beyond a tolerance, the bill is adjusted. If it passes, a fee may apply, so ask about costs before requesting it.
Where do I complain if the supplier does not respond?
Most countries require you to give the supplier a chance to resolve the issue first, often with a deadline. After that, an energy ombudsman or the regulator's complaint route usually takes over, and the decisions can be binding on the supplier. Keep copies of correspondence and readings. The regulator website explains the process and deadlines.
Sources and further reading
These pages were reachable when we last checked. They informed definitions and rules referred to above; they do not endorse this guide. Where rules differ by country, check the authority for your location.
- Ofgem consumer complaints and billing — Ofgem, retrieved 27 October 2026
- Citizens Advice — Citizens Advice, retrieved 27 October 2026
Related guides
Comparison · Electricity and gas plans
Fixed-rate or variable energy plan: how to decide
A fixed plan holds the unit rate for the contract term, which gives budgeting certainty but usually comes with an exit charge and no benefit if wholesale costs fall. A variable plan moves with the supplier's costs or a published index, so bills can rise or fall without notice. Compare how rates are set, what ends the lock, and what leaving early costs.
How to choose · Electricity and gas plans
How to switch electricity or gas supplier without a gap in supply
Switching changes who bills you, not who keeps the lights on: the network operator continues delivering energy. The sequence is to gather your meter details and current contract terms, compare plans on real usage, check exit charges, apply, take a final reading, and verify the closing and opening bills. Regulators in most markets set cooling-off and switch-time rules, so check yours.
Suitability · Electricity and gas plans
Is a time-of-use electricity tariff suitable for your household?
Time-of-use tariffs charge more when the grid is busy and less when it is quiet. They suit households that can shift flexible loads such as laundry, dishwashing, water heating or vehicle charging to cheap periods, and that have a smart meter capable of recording by interval. They suit less well homes whose use is locked into evenings or who cannot automate anything.
Problems & fixes · Business energy
Business energy bill disputes, back-billing and broker problems
Common issues include estimated reads, back-billing for under-charged energy, out-of-contract rates, misdescribed contracts and undisclosed broker commission. Gather contracts, call recordings, bills and readings, raise a written complaint with the supplier or broker, and escalate to the relevant ombudsman or regulator route if unresolved. Protections for businesses differ by country and by business size.
Problems & fixes · Water and utilities
Why a water bill jumps and what to do
A jump usually comes from a leak, such as a running toilet, dripping tap, underground pipe or irrigation fault, an estimated reading corrected later, a meter fault, a billing change, or a genuine use change like guests or a pool. Check the meter with everything off, compare readings with the bill, inspect fixtures, and raise a written query with the provider. Allowances for leaks vary by provider.
Alternatives · Automotive
Car subscriptions compared with leasing and other alternatives to ownership
Subscriptions bundle the car, insurance, tax and often maintenance into one payment with short commitments, which suits people who need flexibility or are unsure about their future needs. Leasing usually carries a longer commitment and lower cost for a fixed period. Car clubs and rentals fit occasional use. Compare what is included, notice periods, mileage limits and how costs behave if your needs change.
How to choose · Automotive
How to choose and fit a child car seat correctly
Choose by the child's size and development stage, confirm the seat carries a current approval mark recognised where you live, and check that it fits your car's seats and anchorage points. Rear-facing for as long as the seat allows is widely recommended by safety bodies. The best seat is one installed tightly every time, so try fitting before buying, and never use a seat that has been in a collision or has an unknown history.
All Electricity and gas plans guides · All Energy and utilities