Model your project savings and peak-demand reduction
Calculate ROITNB Bill Audit
A poorly matched tariff option, a wrongly applied AFA surcharge or avoidable maximum demand peaks can all add to your TNB bill. Our AI-assisted audit checks 3 to 12 months of bills and shows what can be fixed or disputed. RM800–RM5,000 flat fee.
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What we audit
Six categories where TNB billing issues tend to concentrate.
Tariff Class (General vs Time of Use)
Many businesses never revisit their tariff option — for example, staying on Medium Voltage Time of Use when MV General would cost less, or the reverse. A poor fit can add noticeably to your monthly bill. We check your registered tariff against your actual contracted capacity and consumption pattern.
AFA Surcharge
Since July 2025 the Automatic Fuel Adjustment (AFA) surcharge or rebate is set monthly. We check that the AFA applied on each bill matches the published monthly rate for your tariff, for up to 12 months.
Maximum Demand Charges
The Maximum Demand (MD) charge is levied on the highest 30-minute demand recorded in the billing month. We model your half-hourly load profile to find avoidable demand spikes, identify months where MD charges were incorrectly assessed, and recommend demand setpoint adjustments.
Power Factor Surcharge
TNB charges a surcharge when average power factor drops below 0.85. Many buildings have this from legacy HVAC or pump loads — and pay it silently for years. We calculate the correction capacitor bank size needed to eliminate the charge.
Connected Load Mismatch
If your registered connected load in TNB's system is higher than your actual installed load, you may be paying higher minimum charges unnecessarily. We audit your Single Line Diagram against TNB records and file a downward revision where eligible.
Time-of-Use Opportunity
Non-domestic customers on a Time of Use option may benefit from shifting load to off-peak hours. We model your 12-month consumption pattern against peak and off-peak rates and calculate a practical shift schedule.
Audit tiers
Fixed flat fee — no percentage cuts on refunds recovered.
Basic
3-month review
RM 800
- Tariff class verification
- 3 months AFA check
- Connected load spot check
- Summary findings report
- Written dispute letter template
Standard
12-month review
RM 2,500
- Full tariff + AFA 12-month reconciliation
- MD charge analysis (all 30-min intervals)
- Power factor surcharge assessment
- Connected load audit vs TNB records
- TOU shift opportunity model
- TNB dispute filing support
Industrial
Multi-site industrial tariffs
RM 5,000
- Everything in Standard
- Multi-site consolidated audit
- TOU shifting financial model
- Half-hourly load profile analysis
- On-site review meeting
- Ongoing monitoring (3 months post-audit)
What we check
Tariff
Option fit (General vs Time of Use)
MD
30-minute demand peaks
AFA
Monthly surcharge or rebate applied
PF
Power factor below 0.85
How it works
From bill upload to a filed dispute, step by step.
Upload 12 Bills
Securely upload your last 12 TNB bills (PDF or photo). We also accept the TNB e-Billing portal data export.
AI Analysis
Our system cross-references your bills against TNB tariff schedules, published monthly AFA rates, and your consumption pattern to flag every discrepancy.
Dispute Filing with TNB
We prepare and file the formal dispute letter on your behalf, referencing the exact billing code, tariff schedule, and gazette reference.
Follow-Up on Your Bills
Any refund or bill credit is decided by TNB. We check your next 3 bills to confirm that corrections are applied.
Find out if TNB owes you money
Upload your last 3 months of TNB bills for a free quote. We will tell you whether a full audit is worth it.
Related services and next steps
A bill audit is usually the first step. Once tariff and demand charges are understood, these related services and tools help you decide what to do next.
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Business service enquiry
Share your business service requirements with the Trexon team.