Bunker Adjustment Factor
Also called: Fuel Surcharge · Bunker Surcharge · BAS (Bunker Adjustment Surcharge)BAF is an extra charge added to your shipping bill to cover the rise and fall of fuel (bunker) costs for cargo ships. Because fuel prices change constantly, shipping lines use BAF to adjust what they charge — so you're always paying a fair share of the actual fuel cost at the time of shipment.
What exactly is "bunker fuel"?
Ships don't run on petrol or diesel like your car. They burn a thick, heavy fuel called bunker fuel — named after the steel tanks (bunkers) where it's stored on the ship. It's one of the biggest operating costs for any shipping line, and its price swings wildly with global oil markets.
Because fuel makes up 50–60% of a ship's total operating cost, even a small change in oil prices can massively affect a shipping company's expenses. BAF is how they pass that fluctuation on to shippers — fairly and transparently.
Think of it this way
Imagine booking a taxi. The base fare is fixed, but if petrol prices shoot up overnight, the driver adds a fuel surcharge to your ride. BAF works the same way — the base ocean freight rate stays, but shipping lines add BAF when fuel gets expensive and reduce it when prices drop.
How is BAF calculated?
BAF is typically charged as a fixed amount per container (TEU/FEU) or as a percentage of the base freight rate. It's recalculated regularly — monthly or quarterly — based on current fuel prices.
Example shipment — 1 x 20ft container (TEU), India to USA
Base ocean freight rate $950
BAF (Bunker Adjustment Factor)+ $180
THC (Terminal Handling Charge)+ $120
Documentation fee+ $50
Total freight cost $1,300
The BAF amount varies by trade lane (which route your cargo travels), carrier, and time of booking. A shipment from Asia to Europe will have a different BAF than one from India to the US East Coast.
What factors affect the BAF amount?
Global oil prices
The primary driver. When crude oil goes up, bunker fuel follows — and so does BAF.
Trade lane / route
Longer routes burn more fuel. Asia–Europe BAF is typically higher than intra-Asia.
Fuel type used
Low-sulphur "green" fuel (IMO 2020 rules) costs more than traditional bunker fuel.
Review period
Carriers update BAF monthly or quarterly. Rates locked in contracts may differ.
BAF vs. EBS vs. LSS — what's the difference?
You'll often see multiple fuel-related surcharges on a freight invoice. Here's how they differ:
BAF
Standard ongoing fuel surcharge. Applied to most ocean shipments. Covers routine bunker cost fluctuations.
EBS (Emergency Bunker Surcharge)
Temporarily added during sudden oil price spikes (like wars or supply shocks). Goes away when prices stabilize.
LSS (Low Sulphur Surcharge)
Added after IMO 2020 regulations required ships to use cleaner, pricier low-sulphur fuel. Now often merged into BAF.
Many carriers today use a combined charge called Marine Fuel Surcharge (MFS) or Fuel Adjustment Factor (FAF) that bundles BAF + LSS together. Always ask your freight forwarder what's included in each line item on your quote.
Why does BAF matter to you as an importer or exporter?
If you're shipping goods internationally, BAF directly affects your landed cost — the total cost of getting your product to its destination. Here's why you should care:
It changes your profit margin. A higher BAF means your goods cost more to ship, which eats into your margins if you've already quoted a customer a fixed price.
It's not always included in the initial quote. Some freight quotes show only the base rate. BAF, THC, and other surcharges are added separately — always ask for an all-in rate.
It's negotiable on large volumes. If you're shipping regularly or in bulk, freight forwarders can sometimes lock in a fixed BAF or cap it within a contract period.
Frequently asked questions ( FAQs)
1. Is BAF the same as fuel surcharge?
Yes, essentially. BAF and "fuel surcharge" are often used interchangeably. Some carriers brand it differently (EBS, FAF, MFS), but they all serve the same purpose — recovering fuel cost fluctuations from shippers.
2. Can BAF change between booking and shipment?
Yes. If your booking and sailing dates fall in different review periods, the BAF can change. Always confirm which period's rate applies to your shipment at the time of booking.
3. Is BAF charged on LCL (less than container load) shipments too?
Yes. For LCL cargo, BAF is typically charged per cubic metre (CBM) or per freight ton (W/M), instead of per TEU. The principle is the same — you pay a proportional share of the fuel cost.
4. Who sets the BAF amount?
Each shipping line sets its own BAF based on their fuel consumption, route, and market conditions. There's no single global rate — which is why BAF varies between carriers for the same route.