When Yondr Group closed more than US$ 900 million in project financing for its 98MW data centre campus in Johor in December 2024, the deal was immediately cited as a regional benchmark. Seven lenders – DBS Bank, Deutsche Bank, HSBC, IFC, Global Infrastructure Partners, ING and Natixis CIB – joined a group that Clifford Chance described as setting the template for hyperscale infrastructure lending in Southeast Asia. What none of them had modelled was that within seven months of financial close, Malaysia would reclassify large data centres into a new tariff category and increase their electricity costs by up to 15 per cent.

Malaysia’s Regulatory Period 4 (RP4), effective 1 July 2025, replaced flat-rate billing with a five-component structure: energy charge, capacity charge, network charge, retail service charge and a monthly Automatic Fuel Adjustment (AFA) mechanism. Data centres at scale were placed into a new ultra-high voltage (UHV) category at average tariffs of approximately 60 cents per kilowatt-hour.

Sprint DC Consulting founder Gary Goh estimated the impact at US$ 15-20 million per year for a large facility before the fuel surcharge. Data Centre Association of Malaysia president Mahadhir Aziz noted that operators who had committed land and capital could still reconsider their positions if the calculus shifted materially.

But reconsideration quickly gave way to recalibration. Deals moving towards financial close in 2026 are being underwritten with RP4 as the base case, and three structural responses have emerged.

The first is a redesign of power cost pass-through clauses. Where earlier leases included fixed or capped electricity recovery, sponsors and lenders are now seeking structures in which documented tariff changes – including monthly AFA movements – flow directly to the operator’s revenue line. The creditworthiness of hyperscaler tenants, which is central to non-recourse underwriting logic, supports this: investment-grade counterparties can absorb verified tariff changes provided the mechanism is clearly defined in the lease.

The second concerns debt service coverage ratios. The shift from a semi-annual ICPT to a monthly AFA is the key change here. Where the old mechanism gave sponsors a six-month planning cycle, the AFA resets every month based on fuel prices and the ringgit-to-dollar exchange rate, with the Energy Commission capping automatic adjustments at ±3 cents per kWh before Cabinet review is triggered.

For a facility drawing hundreds of megawatts, even that monthly band translates into material cash flow variability – a sensitivity that static DSCR models do not capture. Lenders are now stress-testing coverage against a range of AFA scenarios rather than a single tariff assumption and incorporating stepped cash sweep mechanisms that activate at defined coverage levels rather than triggering immediate covenant breach.

The third response is the Corporate Renewable Energy Supply Scheme (CRESS), which Malaysia opened to all commercial consumers from 1 March 2025. CRESS allows operators to procure renewable power directly from independent developers via long-term PPAs of up to 21 years, bypassing the retail tariff entirely.

KWM notes that CRESS contracts can be structured to provide long-run price certainty against future tariff increases, a direct hedge against AFA variability. The scheme received its first validation in June 2025 when DayOne Data Centres signed Malaysia’s first Bilateral Energy Supply Contract under CRESS with TNB.

White & Case noted that post-RP4 tariffs still average around USD 0.10/kWh, and that Malaysia retains a cost advantage over regional peers. The shock has been absorbed. What remains is the discipline of building that reality into every deal from day one.