An oil marketing company reports a quarterly profit several times the previous quarter’s. The refining margin it reports has jumped. Read the notes and a large part of the jump is an inventory gain: crude prices rose during the quarter, and oil bought earlier at lower prices was sold at higher ones. The next quarter crude falls back, the gain reverses into a loss, and the profit collapses. The refinery was run exactly as well in both quarters.
A shopkeeper buys sugar in bulk and sells it over a month. If the market price of sugar jumps mid-month, the sacks already in his godown are suddenly worth more, and that month’s profit looks wonderful — though he did nothing differently. If the price falls, the same godown produces a loss. His real business is the margin he makes on each kilo he sells; the rest is luck with prices.
A refiner holds weeks of crude and fuel, so every move in oil prices creates exactly this kind of gain or loss. The refining margin — what it earns for turning crude into products — is the business. The inventory effect is the godown.
Three businesses: refining, marketing, and the oil field
| Business | How it earns | What drives profit |
|---|---|---|
| Refining | The gross refining margin (GRM) per barrel processed | Product cracks (product price minus crude), crude sourcing, refinery complexity, utilisation |
| Fuel marketing | A margin per litre at the pump, and on LPG and other products | Retail prices, which have often been held steady, against the moving cost of fuel |
| Upstream (exploration and production) | Selling crude and gas it produces | Oil and gas prices, production volumes, levies and government pricing formulas |
| City gas distribution | Selling CNG and piped gas | The spread between gas cost and selling price, and volume growth in its licensed areas |
- Crack spread
- the gap between one product’s price and crude — diesel cracks, petrol cracks; GRM is roughly the weighted sum of the cracks
- Reported GRM
- core GRM plus or minus inventory gains and losses
Example: A refinery converts crude into a slate of products worth $8 a barrel more than the crude cost. That $8 is its GRM; after about $3 of operating costs, it keeps about $5 a barrel.
Separate the core refining margin from the inventory gain, and see how the reported GRM moves with crude.
The pump price that does not move
Petrol and diesel prices in India are formally market-determined — petrol since 2010 and diesel since 2014 — but in practice the state-owned marketing companies have held them unchanged for long stretches. So the marketing margin per litre swings with crude: when crude rises and pump prices do not, marketing margins shrink or turn negative, and when crude falls, they widen. A falling crude price can therefore hurt a refiner’s GRM through inventory losses while helping its marketing arm. Read the two together, and watch LPG, where selling below cost creates under-recoveries that the government may or may not compensate.
Upstream and gas
An upstream producer’s revenue is its production volume times the price it realises, net of levies such as royalty and cess. Its costs are largely fixed once a field is producing, so profits track the oil price closely — but government levies and pricing formulas can cap how much of a price rise it keeps. City gas distributors are different again: they hold exclusive licences for geographic areas, buy gas and sell it as CNG and piped gas, and earn a spread. Their risks are the cost of gas, especially when cheaper domestic allocation is cut, and competition from electric vehicles.
In a quarter when crude oil prices fell sharply, a refiner’s reported GRM most likely:
Refinery ki kamai = GRM: products ki keemat − crude ka kharcha, per barrel. $8 GRM, $3 kharcha = $5 × 11 crore barrel ≈ ₹4,673 crore. Par crude $10 mehenga hua aur 30 din ka stock pada tha, toh ₹768 crore ka inventory gain — yeh refining nahi, godown ki kismat hai. Crude gira toh yahi ghaata ban jaata. Petrol-diesel ke pump daam aksar lambe samay tak nahi badalte, isliye marketing margin crude ke ulta chalta hai. Windfall tax, gas pricing — sarkar ek faisle se munafa badal deti hai.
- GRM is the value of a refinery’s products minus its crude cost, per barrel; compare it with a regional benchmark.
- Reported GRM includes inventory gains and losses from crude price moves — separate out the core margin.
- Marketing margins swing with crude because pump prices are often held steady; refining and marketing can move in opposite directions.
- Upstream profits track oil and gas prices, subject to levies and government pricing formulas.
- Policy — taxes, windfall levies, gas pricing, LPG compensation — can reset a segment’s profit overnight.
Mark it done to track your progress through the curriculum.
Common questions
Short, direct answers to what people ask about this topic.
- GRM meaning in oil refining
- GRM, or gross refining margin, is the difference between the value of all the products a refinery makes — petrol, diesel, jet fuel, LPG and others — and the cost of the crude oil it processed, usually expressed in dollars per barrel. It is the refinery’s gross profit per barrel before operating costs. Companies often compare their GRM with a regional benchmark such as the Singapore GRM, and a higher GRM than the benchmark indicates a more complex or better-run refinery.
- what are inventory gains for oil marketing companies
- Inventory gains arise because a refiner holds weeks of crude and products in stock. When crude prices rise, that stock — bought at the old price — is valued and sold at the new higher price, inflating reported margins; when crude falls, the same effect creates inventory losses. These gains and losses come from holding stock, not from refining, so analysts separate them to see the core GRM.
- how do oil marketing companies earn on petrol and diesel
- An oil marketing company earns a marketing margin — the difference between the retail price at the pump, after taxes and dealer commission, and the cost of the fuel it supplies, per litre. Although petrol and diesel prices are formally market-determined, in practice they have been held unchanged for long periods, so when crude rises the marketing margin shrinks or turns negative, and when crude falls it widens.