Mill or no mill: where the fruit goes

Oil palm fruit can’t be stored. Indonesia’s fruit pricing rule defines fresh fruit bunches (tandan buah segar, TBS, or FFB) as fruit that has to reach a mill within 24 hours of harvest. So an estate is only worth as much as its access to a mill that will take its fruit on time.

Whether an estate has its own mill, a contract with someone else’s or only the open market decides the price it gets for its fruit. It also decides what happens in a week when the mill stops.

Why the fruit can’t wait

Once a bunch is cut, the fruit starts to break down. Bruised fruit breaks down faster, its free fatty acid content rises and the oil made from it is worth less. That’s why harvesting, transport and milling run as one daily cycle, and why roads and bridges matter as much as the palms. When a flooded road cuts off a block, its ripe fruit can’t wait for the water to go down.

A mill’s size is given in tonnes of FFB it can process per hour. A mill rated at 45 tonnes an hour that runs 20 hours a day needs about 900 tonnes of fruit every day to stay full. When it breaks down, stops for maintenance or runs out of tank space for its oil, its suppliers have to find another mill the same day. Output is seasonal too, so a mill that copes in a low month can be overloaded in the peak months.

Integrated and independent mills

Indonesian rules recognise mills run by plantation companies with their own estates and mills run without one. An integrated mill processes its company’s fruit, usually alongside fruit from plasma partners and outside growers. An independent mill has no estate and buys everything, much of it from smallholders through dealers.

An estate with its own mill sells crude palm oil (CPO) and kernels and keeps the processing margin. It also carries a mill’s costs and duties: the capital, the staff, the treatment of mill effluent, the environmental permits and the need to keep the mill full. An estate without a mill sells fruit and depends on someone else’s price, grading and capacity.

For a company that both grows and processes oil palm, Government Regulation 26 of 2021 sets a minimum area of 6,000 hectares of its own land, a floor based on economies of scale. A company that can’t reach it may make up the shortfall through partnerships with growers, but it must still hold at least 20% of the land itself. If you buy an estate with a mill, check that the land behind it meets this rule and that the fruit the estate and its partners can supply matches the mill’s capacity.

How the fruit price is set

For smallholders in a partnership with a mill, Agriculture Minister Regulation 13 of 2024 sets the price formula. It replaced the 2018 rule in November 2024 and covers plasma growers and independent growers who have signed a partnership contract. The smallholders and plasma article explains those partnerships.

The head of the provincial plantation agency sets the price on the governor’s behalf. A team of provincial and district officials, mills and grower groups proposes it and meets at least once every two weeks. The formula multiplies the growers’ share, called the K index and set monthly, by the value of the oil and kernel in a kilogram of fruit. That value comes from the mills’ CPO and kernel sales prices and from extraction rates in a provincial table, which the agriculture ministry sets and reviews at least once every five years. Shells the mill doesn’t burn as fuel can add to the price if they sell.

The result is a price at the mill, so the cost of getting fruit there falls on the grower. Fruit sold through dealers outside a partnership is priced by negotiation. An estate company selling fruit to another company’s mill isn’t covered either, so its price and grading depend on its contract. How world prices, levies and the 2026 state export channel feed into the CPO price is covered in what moves palm oil prices.

Grading and deductions

At the mill, every load is weighed and sorted, and under the 2024 rule a representative of the partner growers has to witness both. A load is accepted at full weight only if it meets these conditions:

• No unripe bunches, at least 95% ripe bunches and no more than 5% overripe.
• No empty bunches, and stalks cut to 2.5 centimetres or less.
• Loose fruit making up at least 10% of the weight.
• Nothing mixed with rubbish, soil or sand, and bunches of at least 3 kilograms each.

Fruit that falls short can be turned away or docked by weight, using fixed formulas. An empty bunch counts for nothing. Unripe fruit loses half its weight, and bunches under 3 kilograms lose 70%. Smaller deductions apply to overripe fruit above the 5% allowance, to long stalks and to loads with too little loose fruit.

A few points of deduction on every load add up over a year. Grading records also show where fruit is lost in the field. Steady deductions for unripe bunches point to harvesters cutting too early, and too little loose fruit points to fruit left on the ground. Oil content and the age of the palms affect what the fruit is worth before any of this.

Before you sign

• Map the mills within reach by road in the wet season: their capacity, their owners and whether they’re integrated or independent.
• Read the supply contract: its term, the price basis, grading, payment terms and what happens when the mill stops buying.
• Compare weighbridge tickets and grading records for at least three years with the estate’s harvest records and the payments received.
• If the estate has a mill, check its licences, its effluent permits, the age of its equipment and how much of its fruit comes from outside.
• Ask whether the mill is ISPO or RSPO certified and whether its buyers want plot-level traceability, which EU-bound supply needs from 30 December 2026 (see the EU deforestation rules).