Disputing a TNB Back-Billing Claim in Malaysia: A Practical Guide
You can dispute a TNB back-billing claim by challenging its legal basis, the period it covers, and the way it was calculated. The first question is which rule TNB is using. A claim for electricity theft or meter tampering falls under section 38 of the Electricity Supply Act 1990 (Act 447). A correction for a faulty meter, a misreading or a wrong tariff falls under the Licensee Supply Regulations 1990. Each has its own limits.
This article explains both routes, how TNB works out the figure, what it must prove, the time limits, how to negotiate, and how to defend a claim in court. It covers Peninsular Malaysia, where TNB is the licensee.
Key takeaways
- A TNB back-bill is either a loss of revenue claim for an offence such as meter tampering under section 38 of Act 447, or a retrospective adjustment for a meter or billing fault under the Licensee Supply Regulations 1990.
- Outside court, a loss of revenue claim for tampering cannot go back more than six months from the date the offence was discovered.
- A retrospective adjustment for meter faults, misreading or a wrong tariff is generally limited to three months under the Regulations.
- TNB's certified written statement is prima facie evidence of the amount, so a bare denial will not defeat it; you need evidence that the calculation or the period is wrong.
- TNB cannot use disconnection to force payment of a disputed loss of revenue claim; its remedy is a civil action.
On this page
Which rule is TNB using for your back-bill?
Start by identifying the legal basis of the claim, because it decides how far back TNB can go and what it must prove. TNB's letter or written statement should say which provision it relies on. If it does not, ask in writing.
| Point | Tampering or theft | Meter or billing fault |
|---|---|---|
| Law | Section 38(3) to (5), Electricity Supply Act 1990 | Regulation 11, Licensee Supply Regulations 1990 |
| Trigger | An offence under section 37(1), (3) or (14), such as interference with the meter | Meter inaccuracy or malfunction, wrong reading, wrong multiplying constant, cross-connection, faulty installation, or wrong tariff |
| Period | Up to six months before discovery, unless TNB sues | Generally up to three months |
| Fault needed | An offence must have been committed, but no conviction is needed | No fault by the consumer |
The distinction is often decisive. A clamp or bypass found in the meter points to section 38. A meter that simply slowed down with age, or a reading error by TNB, points to regulation 11. If TNB has labelled a fault as tampering, the period and the amount it can claim may be much smaller than its letter suggests.
Overcharging works in your favour too: regulation 11 also requires TNB to adjust where you were overcharged because of a meter or billing fault.
How does TNB calculate a loss of revenue claim?
TNB estimates how much electricity was actually used, subtracts what the meter recorded, and prices the difference at the applicable tariff, adding reasonable expenses. Section 38(4) requires the written statement to set out the amount, the manner of calculation and the person liable, so you are entitled to see how the figure was reached.
The estimate of actual use can be based on, for example:
- your consumption before the suspected tampering began, compared with the period after;
- consumption after the meter was replaced;
- an accuracy test on the removed meter. In a 2025 Shah Alam High Court case, a test showed the meter recorded only 7.16% of the power used; or
- the connected load of equipment and the hours the premises operate.
Check each element:
- The start date. Why does TNB say the tampering began then? Look at the date of the last clean inspection and when your consumption actually dropped.
- The baseline. Was your earlier consumption typical, or was it a busy period?
- The tariff. Was the correct tariff category applied for the whole period?
- Credits. Were amounts you already paid for recorded consumption deducted?
- Expenses. Are the inspection, meter and reconnection costs reasonable and supported?
Errors in the start date and the baseline usually have the biggest effect on the total.
What evidence must TNB show?
TNB must show that an offence under section 37(1), (3) or (14) was committed and that the amount claimed is the loss caused by it. It does not need a criminal conviction, as the Court of Appeal held in Tenaga Nasional Bhd v Mayaria Sdn Bhd [2019] 2 MLJ 801, and it does not need to prove who did the tampering. The registered consumer is liable.
TNB's usual evidence includes:
- the inspection report and photographs taken before the meter was rectified;
- the removed meter and any laboratory test results;
- your billing and consumption history; and
- the certified written statement and the calculation behind it.
The written statement is prima facie evidence of the amount, so the consumer must bring real evidence to answer it. In March 2026 the Klang Sessions Court ordered a wood processing company to pay about RM476,000. It rejected the company's explanation that consumption fell because of the Covid-19 movement control order, since the loss period began before the order, and called its evidence a bare denial.
Useful counter-evidence includes production and sales records, records of closures, tenancy records, CCTV, and an independent electrical engineer's report. Ask early about the chain of custody of the removed meter: where it was kept, who tested it, and whether it was sealed.
Are there time limits on TNB's claim?
Yes. Several limits apply, and they work differently.
| Limit | Rule | Source |
|---|---|---|
| Six months | Without a court action, a loss of revenue claim cannot cover more than six months before the offence was discovered | Section 38(3), Act 447 |
| 14 working days | Where TNB disconnected supply, it must notify the written statement within 14 working days after disconnection, unless the Energy Commission extends this in writing | Section 38(4), Act 447 |
| Three months | Retrospective adjustments for meter faults, misreading or a wrong tariff are capped at three months | Regulation 11(2) and (5), Licensee Supply Regulations 1990 |
| Six years | A court action to recover a sum recoverable under a written law must generally be brought within six years of the cause of action | Section 6(1)(d), Limitation Act 1953 (Act 254) |
Two points are often misunderstood. First, the six-month cap does not stop TNB from claiming a longer period. It means a longer claim must be brought and proved in court, as happened in the Klang case, where the period ran for about ten months. Second, the Federal Court held in Tenaga Nasional Bhd v Chew Thai Kay [2022] 2 CLJ 333 that the 14-working-day limit applies only where there has been a disconnection. Without one, TNB can still issue the statement and sue.
Should you negotiate or pay by instalments?
Negotiation is often sensible, but only after you have checked the figure. A signed payment arrangement is hard to undo. In a 2025 Shah Alam High Court case, a frozen food wholesaler that had agreed a payment arrangement with TNB sued for a refund, but the court found it had agreed voluntarily and dismissed the claim.
- Ask for the full calculation and supporting documents in writing.
- Reply in writing, setting out each point you dispute: the basis, the period, the baseline and the expenses.
- Make settlement proposals marked "without prejudice", so they cannot be used as an admission if the case goes to court.
- Negotiate the period and the amount before the instalments. A shorter period is often worth more than a longer payment plan.
- Put any agreement in writing, stating the total sum, the instalment dates, what happens on a missed payment, and that it settles the claim in full.
Keep two limits in mind. TNB cannot disconnect supply to pressure you into paying a disputed loss of revenue claim; the Court of Appeal in Mayaria held that its remedy is a civil action. And a civil settlement does not by itself end a criminal investigation, because the decision to prosecute rests with the authorities, not with TNB.
How do you defend a civil suit by TNB?
Act from the first day. If you miss the time limits, TNB can obtain judgment in default without a trial.
The court depends on the amount: the Magistrates' Court for claims up to RM100,000, the Sessions Court for claims above RM100,000 up to RM1 million, and the High Court above that. The usual steps under the Rules of Court 2012 are:
- Enter appearance, generally within 14 days after service of the writ.
- File a defence, generally within 14 days after the time for appearance, setting out each ground of dispute.
- Oppose any summary judgment application by showing a real issue for trial, supported by documents.
- If a tenant was responsible, consider a third party claim against them in the same case.
- Exchange documents and witness statements, and consider an engineer's report on the calculation.
- Trial, followed by any appeal.
Common defences are that no offence was committed, the evidence is unreliable, the start date or baseline is wrong, you were not the registered consumer, or the claim is out of time. If TNB disconnected you unlawfully, a counterclaim for losses may be possible, but in 2024 the Court of Appeal set aside a RM3.68 million award against TNB because the losses were not proved with evidence. Our civil and commercial disputes team can review a TNB claim at a consultation.
Frequently Asked Questions
How far back can TNB back-bill in Malaysia?
It depends on the reason. For meter tampering or electricity theft, TNB's claim under section 38(3) of the Electricity Supply Act 1990 is limited to six months before the offence was discovered, unless TNB sues in court and proves a longer period. For meter faults, misreading or a wrong tariff, the Licensee Supply Regulations 1990 generally limit retrospective adjustments to three months.
Do I have to pay a TNB loss of revenue claim if I did not tamper with the meter?
Not necessarily, but you cannot escape it simply by saying someone else did it. In Malaysia, the registered consumer is liable for TNB's loss of revenue from meter tampering, even if a tenant or third party did the tampering. You can still dispute whether an offence was committed and how the amount was calculated, and claim against the person who was responsible.
Can TNB cut my electricity if I dispute a back-billing claim?
TNB cannot lawfully disconnect supply simply to force payment of a disputed loss of revenue claim. The Court of Appeal held in Tenaga Nasional Bhd v Mayaria Sdn Bhd that TNB's remedy is a civil action, and the Federal Court held in Chew Thai Kay that TNB cannot disconnect once a tampered meter has been replaced. Unpaid regular monthly bills are a separate matter and can lead to disconnection after notice.
Can I pay a TNB back-billing claim by instalments?
TNB may agree to instalments, but it is a matter of negotiation, not an automatic right under the Electricity Supply Act 1990. Before agreeing, check the legal basis, the period and the calculation, because a Malaysian court has held that a consumer who voluntarily agreed a payment arrangement could not later recover the money. Put any arrangement in writing, including the total amount and the consequences of a missed payment.
How long does TNB have to sue for a loss of revenue claim?
In Malaysia, an action to recover a sum recoverable under a written law, such as TNB's loss of revenue claim under the Electricity Supply Act 1990, must generally be brought within six years under section 6(1)(d) of the Limitation Act 1953. When time starts to run depends on the facts, so a consumer facing an old claim should have the dates checked by a lawyer.
Need advice on your own situation?
Every case turns on its own facts and documents. Our lawyers in Puchong and Mont Kiara advise once we have reviewed your documents at a consultation, online or in person.
Related reading
This article is general information on Malaysian law as at October 2026 and is not legal advice. Laws and procedures change, so please seek advice on your own facts before acting.
