Estimate your TNB electricity bill under the new RP4 tariff, from your monthly kWh usage.
Estimated monthly bill
RM 180.56
RM 2,166.76 per year
Estimated monthly bill: RM 180.56
RP4 tariff (from 1 July 2025). Retail charge, AFA and service tax are waived at or below 800 kWh (temporary relief until 31 Dec 2026; 600 kWh from 2027). KWTBB applies above 300 kWh. AFA pre-filled for October 2026 (+3.61 sen/kWh) — adjust when ST announces a new month.
400 kWh a month
At 44.43 sen/kWh plus 1.6% KWTBB; retail charge, AFA and service tax waived.
≈ RM180.56
800 kWh a month
800 × 44.43 sen plus 1.6% KWTBB, under the Sep–Dec 2026 relief. From 2027 (600 kWh threshold, zero AFA) it's ≈ RM378.24 with retail charge and service tax.
≈ RM361.13
How the figures above are worked out — the rules, rates and reasoning behind every line.
From 1 July 2025, TNB's domestic tariff is built from an energy charge plus a retail charge, instead of the old tiered blocks.
The combined energy rate is about 44.43 sen/kWh for usage up to 1,500 kWh (54.43 sen above). The RM10 retail charge, AFA and service tax are waived for usage of 600 kWh or less (800 kWh from September to December 2026).
Bill = usage × energy rate + AFA − efficiency incentive, then + 1.6% KWTBB (above 300 kWh), + 8% service tax on the usage above the threshold, + RM10 retail charge (above the threshold).
Examples assume zero EEI unless you enter it — in October 2026 the AFA surcharge is +3.61 sen/kWh.
Under TNB's RP4 tariff from July 2025, the combined domestic energy rate is about 44.43 sen/kWh for usage up to 1,500 kWh, plus a RM10 retail charge, AFA and service tax once usage passes 600 kWh (800 kWh until 31 Dec 2026), and 1.6% KWTBB above 300 kWh.
A rebate of up to 25 sen/kWh for households using 1,000 kWh or less a month, sliding down as usage rises. The exact amount appears on your bill and in myTNB.
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