Contestable retail
A retail contract negotiated directly with a licensed retailer, as an alternative to the default MSSL tariff in Singapore.
Contestable retail contracts are bespoke agreements between a customer (typically a larger consumer) and a licensed retailer, negotiated as an alternative to the default MSSL tariff.
Under contestable retail, the customer can negotiate the tariff structure directly: block-rate pricing, time-of-use windows, capacity charges, indexation clauses, and hedging arrangements. The retailer holds the risk against the wholesale market and passes on a structured retail product to the customer.
Contestable retail tariffs are often less transparent than MSSL and require dispatch modelling to be done against the specific contract, not a generic template.
In Singapore
Only customers above a threshold (historically 2 GWh/year) are eligible for contestable retail. The threshold has moved over time - check the current EMA guidance for your site's eligibility.