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EMA sought feedback on the proposed modifications via a public consultation exercise from 13 Feb 2026 to 13 Mar 2026. There was no feedback received throughout the consultation period. EMA has decided to modify the TLF methodology as set out in the attached Decision Paper. The revised methodology for determining TLFs will take effect on 1 Apr 2026.
Transmission Loss Factors (TLFs) are scaling factors applied to account for transmission losses and unaccounted-for energy. If such losses were not accounted for, settlement errors would result due to a mismatch between injection and withdrawal quantities. TLFs are used in equations in the Metering and Market Support Services (MSS) Codes for purposes of settlement in the wholesale electricity market and determination of electricity charges respectively.
In accordance to Section 6.1.4 of the MSS Code, the Energy Market Authority(EMA) may specify the methodology for calculating TLFs. The current methodology for determining TLFs for the Singapore Electricity Distribution System was revised and implemented in November 2012. EMA has reviewed the methodology and is proposing modifications.
Please refer to the Consultation Paper for details on the proposed modifications.
EMA invites written representations on the proposed modifications to the TLF methodology as set out in Appendix 1.
All submissions should reach EMA via email to EMA_ES@ema.gov.sg/by post by 5pm on 13 March 2026 in the format shown in Appendix 2 of the Consultation Paper.
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