Malaysian households and businesses are seeing higher monthly electricity charges as the Automatic Fuel Adjustment mechanism, which passes rising fuel and foreign exchange costs from Tenaga Nasional Berhad through to consumer bills, has climbed sharply since June 2026. Tenaga Nasional Berhad’s own forecasts point to further increases through October, driven in part by fuel market pressure tied to renewed US-Iran tensions in West Asia.
Key Facts At A Glance
- The Automatic Fuel Adjustment (AFA) is a monthly surcharge on TNB bills, shown in sen per kWh, that tracks real-time changes in fuel and generation costs
- The Energy Commission or a ministerial decision sets the final AFA rate each month
- The AFA rose from +2.59 sen/kWh in June 2026 to +3.59 sen/kWh in July 2026
- TNB’s published forecast shows further increases to +8.33 sen/kWh in August, +8.94 sen/kWh in September, and +8.04 sen/kWh in October
- A RM206 million contribution from the Electricity Industry Fund partially offset the July increase
- About 85% of domestic customers using 600 kWh or less monthly remain exempt from the AFA, retail charge, and SST
- Customers using 300 kWh or less are also exempt from the renewable energy fund charge
- TNB bills now show three separate components: Energy Charge, AFA, and Capacity Charge
Malaysian consumers checking their June and July electricity statements have noticed a larger line item labeled Automatic Fuel Adjustment, or AFA, on their Tenaga Nasional Berhad bills. The AFA is a monthly surcharge that reflects changes in the cost of fuel and related generation expenses, rising when fuel prices or foreign exchange rates increase and falling when they decline, with the final rate expressed in sen per kilowatt-hour set by the Energy Commission or a ministerial decision.
The mechanism is forward-looking rather than fixed. TNB projects fuel and foreign exchange costs to set an AFA projection for billing, and once actual generation costs are confirmed, any differences are reconciled in later months’ AFA, which is why the published rate shifts from month to month rather than remaining constant.
The Numbers Behind The Increase
The AFA rose from an addition of 2.59 sen per kWh in June 2026 to 3.59 sen per kWh in July, with the July increase partly offset by a subsidy from the Electricity Industry Fund. TNB’s published three-month forecast points to considerably steeper increases ahead: 8.33 sen per kWh in August, 8.94 sen per kWh in September, and 8.04 sen per kWh in October. That forecast trajectory suggests the surcharge is expected to remain elevated well beyond the current billing cycle.
Geopolitics And The Fuel Bill
Fuel for some Malaysian power plants comes from imported oil, diesel, or gas, with many contracts priced in foreign currencies. Renewed US-Iran tensions in West Asia can tighten global fuel supply, push up oil and LNG prices, and weaken the ringgit against the dollar, and higher commodity prices combined with a weaker ringgit raise the cost of fuel purchases for generators, with those added costs flowing through the AFA mechanism into consumer bills.
Who Is Shielded, And Who Is Not
TNB’s billing breakdown separates charges into three components: the Energy Charge covering generation fuel, the AFA covering fuel and foreign exchange adjustments, and the Capacity Charge covering payments under power purchase and service level agreements. According to TNB, roughly 85% of domestic customers who consume 600 kWh or less each month remain exempt from the AFA, the retail charge, and the sales and service tax, while customers using 300 kWh or less are also exempt from the renewable energy fund charge. For households above those thresholds, the surcharge is a direct addition to the bill. For example, an AFA rate of 3.59 sen per kWh applied to 400 kWh of monthly usage adds approximately RM14.36 to a bill.
What Happens Next
The AFA is expected to remain a variable factor in the months ahead given ongoing geopolitical risk and seasonal heat-driven demand, and TNB and the Energy Commission are expected to continue publishing updated rates as global fuel markets and exchange rates shift. Publicly available reporting on this specific consumer-facing mechanism is limited to the explainer that TNB and the Energy Commission have made public; further detail on underlying generation cost assumptions has not been disclosed.