A government statement sent to AFP said there would be no increase "for subsidised or non-subsidised" fuel from April 1, and urged citizens not to panic in reaction to "misinformation" being spread about a pending price hike.

"We hope that the public will not panic or feel anxious because we guarantee the availability of fuel. We guarantee it. And there is no price adjustment," it quoted presidential spokesman Prasetyo Hadi as saying.

Indonesia, an oil producer, is nevertheless a net importer and heavily subsidises fuel and natural gas for domestic consumers.

The government has doggedly defended the subsidy, which at $12.3 billion represents about five percent of the total annual budget for 2026.

But observers say its hand may eventually be forced given that Indonesia is required by law to keep its fiscal deficit under three percent of gross domestic product.

The 2026 fuel subsidy calculation was premised on a global oil price of $70 per barrel, but prices have since topped $100.

Prasetyo insisted on Tuesday that "the government guarantees the availability of fuel for the public at affordable prices".

Previous fuel price hikes have resulted in mass riots in Indonesia.

Unlike many of its neighbours, Southeast Asia's biggest economy has not seen long fuel queues as global oil prices have soared.

On Sunday, the government announced a one-day-per-week cut to its free school meals plan, though not for areas with high malnutrition rates.

More measures are expected to be announced later on Tuesday.

Earlier this month, Prasetyo said the government was seeking to find savings of up to 80 trillion rupiah ($4.7 billion).

Measures under consideration include ordering government workers to work from home one day per week, cutting back on official travel, and encouraging bicycle, electronic car and public transport use to preserve fuel.

President Prabowo Subianto seeks to raise the economic growth rate from 5.1 percent last year to eight percent by 2029, powered by high public spending.