TL;DR: Bunker prices are delivered prices for marine fuel, quoted in US dollars per metric ton for a specific port, grade and delivery window. They track crude oil and shift constantly by port. To buy well, benchmark every quote against recently transacted prices for the same port, grade and window, not against published averages.
What are bunker prices?
Bunker prices are the market price of marine fuel, quoted in US dollars per metric ton (mt), for a specific port, a specific fuel grade, and delivery within an agreed window. They are delivered prices: the figure includes barging the fuel to the vessel, not just the product itself. And they move daily, tracking the wider oil market and local supply.
Because a price is only meaningful for a given port, grade and date, there is no single "bunker price"; there is a live grid of them across the world's bunkering hubs. Understanding that grid is what separates a defensible purchase from a lucky one.
How bunker prices vary by port
Bunker prices differ from port to port because each hub has its own supply and demand balance. Local refining capacity, the cargo flows passing through, the number of competing suppliers, barging costs and regional demand all push a port's price above or below the global average. High-volume hubs are usually the keenest; thin or disrupted ports carry a premium. (For a live view of world bunker prices by port and grade, see Bunker Pricer.)
Indicative structure, not a daily price list: port positions move constantly. Spreads can even invert on geopolitics alone: in mid-2026, Strait of Hormuz disruption pushed Fujairah VLSFO well above Rotterdam, turning a normally keen hub into an expensive one almost overnight. The practical lesson is that "cheapest port" is a moving target you have to check, not assume.
Fuel grades and price spreads: VLSFO, HSFO, MGO
Sulphur content sets the price ladder. HSFO (high sulphur fuel oil, up to 3.5% sulphur) is the cheapest grade but can only be burned by vessels fitted with a scrubber. VLSFO (very low sulphur fuel oil, max 0.5% sulphur) is the default fuel since the IMO 2020 sulphur cap and sits in the middle. MGO (marine gas oil, max 0.1% sulphur) is a cleaner distillate required in emission control areas (ECAs) and is the most expensive: typically $80–150/mt above VLSFO, depending on market conditions.
The grades are defined by the ISO 8217 standard, whose 2024 edition now covers VLSFO and biofuel blends explicitly. Biofuel blends such as B24 and B30 price at a premium to conventional fuel but are increasingly bought to meet regulation; see sustainable bunker supply for the options and availability.
What moves bunker prices?
Five forces do most of the work:
- Crude oil price: the dominant driver. Bunkers are refined products, so they broadly track Brent and the wider oil complex.
- Refinery output and product flows: when refineries prioritise other products or run into outages, the differential for a specific grade can move independently of crude.
- Regional supply shocks and geopolitics: a disruption at a key hub or chokepoint can spike a port's price and invert normal spreads within days.
- Regulation: sulphur caps, the EU ETS and FuelEU Maritime add an effective cost per tonne on top of the headline price.
- Seasonal demand: heating and shipping demand cycles shift the balance at the margin.
How to benchmark bunker prices
Benchmarking is where a price becomes a decision. The key point: most published indices are assessed or quoted prices, and daily averages can smooth away the spread you can actually buy at, so they show direction, not the number you should be paying. The credible benchmark is transacted prices for the same port, grade and delivery window as your stem.
A reliable four-step method:
- Compare against recent transacted data, not headline averages: what buyers actually paid for your port and grade, close to your dates.
- Normalise every offer for credit terms, barge and delivery window, so you're comparing like with like.
- Evaluate total cost, not headline $/mt: factor in quality, claims history and compliance exposure, because the cheapest quote is rarely the cheapest outcome.
- Record every quote, so your negotiation history compounds and each supplier conversation starts from evidence.
This is exactly what live bunker price benchmarking is built for: checking each offer against transacted market data rather than a lagging index.
Start your 14-day free trial: benchmark your next stem against live, transaction-backed prices across 170+ ports.
From price visibility to smarter buying
Knowing the price is step one. The saving lands when that visibility feeds a structured buying workflow: planning, comparison, ordering and verification in one place, with price benchmarking built in. That's the difference between reacting to quotes and running a bunker desk that consistently buys well. See how it fits into digital bunker procurement.
Book a demo: see bunker price visibility inside an end-to-end procurement workflow.
