You just received a freight quote and one of the line items reads “BAF, £145 per TEU.” You have no idea what it means, whether it is correct, or whether you can push back on it.
This article explains exactly what BAF is, how shipping lines calculate it, what typical charges look like by trade lane, and what you can do about it.
What is BAF? The Bunker Adjustment Factor (BAF) is a fuel surcharge added to ocean freight rates to cover fluctuations in the cost of bunker fuel, the fuel used to power container ships. It is charged per TEU (twenty-foot equivalent unit) per trade lane and is published by shipping lines on a monthly or quarterly basis.
BAF sits alongside your base ocean freight rate as a separate line item on your freight invoice. It is not a profit margin for the shipping line. It is a mechanism for passing fuel price risk from the carrier to the shipper.
If fuel prices rise between the time a carrier quotes your freight rate and the time your cargo actually sails, BAF covers that difference. If fuel prices fall, the BAF rate is revised downward at the next review period.
Bunker fuel is the fuel used to power ocean-going vessels. The name comes from the “bunkers”, storage tanks on ships where fuel is held.
There are two types relevant to shipping costs today:
A single large container ship burns 150–200 tonnes of fuel per day. Fuel represents 50–60% of a carrier’s operating expenses, which is why even small oil price movements translate directly into BAF changes.
Freight rates are quoted weeks or months before a vessel departs. A carrier quoting you a rate in January for a March shipment cannot know what fuel will cost in March.
If carriers baked future fuel costs into a fixed all-in rate, they would either overprice every shipment or absorb losses when prices spike. BAF solves this by separating fuel from the base rate entirely.
The base ocean freight rate covers relatively stable costs: crew, port fees, equipment, and vessel financing. BAF covers fuel, the volatile element, and is adjusted regularly to reflect what carriers are actually paying. All major carriers publish separate BAF schedules: Maersk, MSC, CMA CGM, Hapag-Lloyd, Evergreen, and COSCO.
Understanding the calculation lets you verify whether the charge on your invoice is correct.
BAF = (Fuel consumption per voyage × Fuel price per tonne) ÷ Number of TEUs on vessel
In practice, carriers do not publish their vessel-by-vessel fuel consumption data. Instead, they use a trade factor: a standardised multiplier specific to each trade lane, to simplify the calculation:
BAF = Fuel price per tonne × Trade factor
The trade factor accounts for:
Suppose the current VLSFO price is $620 per metric tonne, and the trade factor for the Asia–Europe lane is 0.22:
BAF = $620 × 0.22 = $136.40 per TEU
If the fuel price rises to $720 per tonne the following quarter:
BAF = $720 × 0.22 = $158.40 per TEU
That $22 per TEU increase reflects the fuel price rise being passed directly to shippers. The trade factor itself does not change, only the fuel price input.
BAF covers bunker fuel only. It does not cover carbon levies, EBS, port congestion surcharges, or peak season surcharges, these are all billed separately.
BAF is always quoted and charged per TEU. Here is how that translates to different container sizes:
| Container size | TEU equivalent | Example BAF at £145/TEU |
|---|---|---|
| 20ft standard (1 TEU) | 1 TEU | £145 |
| 40ft standard (2 TEU) | 2 TEU | £290 |
| 40ft High Cube (2 TEU) | 2 TEU | £290 |
| 45ft High Cube (2.25 TEU) | 2.25 TEU | £326 |
On your freight invoice, BAF appears as a named line item alongside ocean freight, THC charges, and documentation fees. It is applied per container, three 20ft containers means three BAF charges.
Broadly yes, but the terminology varies by carrier and era. Here is a quick reference:
| Term | What it means |
|---|---|
| BAF (Bunker Adjustment Factor) | Standard term used by most major carriers today |
| FSC (Fuel Surcharge) | Older term, still used by some carriers and in air freight |
| BAS (Bunker Adjustment Surcharge) | Variant used by some carriers |
| FAF (Fuel Adjustment Factor) | Occasionally used, particularly in older contracts |
| VATOS (Variable Additional to Ocean Surcharge) | Used by some European carriers as an umbrella term that can include BAF |
If you see any of these on an invoice, they are all fuel-related surcharges. Ask your freight forwarder to clarify exactly what is covered under each, as carriers bundle and split these charges differently.
The single biggest change to BAF in recent history came into force on 1 January 2020. The International Maritime Organisation (IMO) introduced a global cap on sulphur emissions from ships, reducing the permitted sulphur content in marine fuel from 3.5% to 0.5%.
This regulation, known as IMO 2020: had two major consequences for BAF:
Some carriers introduced a dedicated Low Sulphur Surcharge (LSS) or Environmental Fuel Fee (EFF) alongside BAF during the IMO 2020 transition. Most major lines have since absorbed these into revised BAF schedules, but you may still see them on older contracts. Pre-2020 BAF rates and post-2020 BAF rates are not comparable, the fuel cost baseline changed permanently.
BAF is a regular, scheduled surcharge, updated monthly or quarterly as part of a carrier’s published tariff. An Emergency Bunker Surcharge (EBS) is something different.
EBS is applied during periods of sudden, sharp fuel price spikes that outpace the carrier’s scheduled BAF review cycle. It is a temporary top-up charge, applied on top of BAF, to help carriers recover costs between tariff updates.
You are most likely to see EBS during sudden oil price surges: for example, following geopolitical disruption to crude supply, or after a major regulatory change that pushes fuel costs up faster than the scheduled BAF review can capture.
EBS is typically announced with shorter notice than BAF, sometimes just two to four weeks. It should appear as a distinct line item on your invoice. If you see both BAF and EBS, you are being charged two separate fuel-related surcharges. You are entitled to ask your carrier or freight forwarder to explain the basis for each.
BAF rates are published in US dollars per TEU by trade lane. The figures below are indicative ranges based on typical market conditions. Your actual BAF will depend on the carrier, the quarter, and current fuel prices.
Indicative BAF ranges by trade lane (per TEU):
| Trade lane | Typical USD range | Approx. GBP equivalent |
|---|---|---|
| Asia – North Europe (westbound) | $100 – $300 | £79 – £237 |
| Asia – UK (via Suez) | $100 – $280 | £79 – £221 |
| North Europe – Asia (eastbound) | $80 – $220 | £63 – £174 |
| Asia – US West Coast | $80 – $200 | £63 – £158 |
| Asia – US East Coast | $120 – $320 | £95 – £253 |
| North Europe – US East Coast | $60 – $180 | £47 – £142 |
| Intra-Europe | $30 – $100 | £24 – £79 |
GBP conversion at around £1 = $1.27. Rates are indicative, always check the current published tariff from your carrier.
BAF is higher on longer routes because fuel consumption per TEU is greater. The Asia–UK lane is among the most expensive. Rates move with the oil price: when Brent crude is at $70–$80 per barrel, BAF on Asia–UK is typically $120–$150 per TEU; at $100+ per barrel, it can exceed $250 per TEU.
To make this concrete, here is a worked example based on a typical UK import.
A UK importer is shipping 1 × 20ft FCL (full container load) from Ningbo, China to Felixstowe.
| Invoice line item | Cost |
|---|---|
| Ocean freight (base rate) | £820 |
| BAF (Bunker Adjustment Factor) | £145 |
| THC — origin (Ningbo) | £110 |
| THC — destination (Felixstowe) | £85 |
| Documentation fee | £45 |
| Total freight cost | £1,205 |
In this example, BAF represents 12% of the total freight cost: not trivial at any volume.
The £145 reflects the current quarter’s published rate for the Asia–North Europe lane. If fuel prices rise and the carrier updates its schedule next quarter, BAF could move to £175 or higher, with no change to the base rate. Freight budgets that treat BAF as a fixed number will be caught out. It is variable by design.
The honest answer: it depends on your situation.
On spot rates, no. BAF on a spot shipment is a published tariff, applied uniformly. You will not get a spot discount simply by asking.
In long-term contracts, sometimes yes. If you are committing volume over 12 months or more, you have use. Options include:
If you are shipping fewer than 20–30 containers per month, your use is limited. Your freight forwarder can advise on what is achievable for your volume and trade lanes.
BAF is a published, transparent charge. Here is how to verify it.
Step 1: Identify your carrier and trade lane from your bill of lading and booking confirmation.
Step 2: Find the carrier’s published BAF schedule. Search “[carrier name] BAF surcharge” on their website. Rates are listed by effective date, check the rate in force on your bill of lading date.
Step 3: Compare the rate to your invoice. The BAF charged should match the carrier’s published rate for that lane and period. Any discrepancy should be explained by your freight forwarder.
Step 4: Check the TEU count. A 40ft container is 2 TEU. If your invoice shows 3 TEU for a single 40ft, question it.
Step 5: Check for duplication. BAF, EBS, and LSS are separate charges. If the fuel section of your invoice shows multiple overlapping surcharges, ask for an explanation of each one.
If you negotiate a contract freight rate for three, six, or twelve months, BAF treatment within that contract matters.
Key contract terms:
When reviewing a freight contract, always ask: “What is the BAF treatment, and what triggers a change?” Get the answer in writing.
Always ask whether your contract includes a BAF review mechanism: a clause that defines how and when BAF can change, so adjustments are structured rather than unexpected.
UK importers face a few specific considerations around BAF:
Currency. Carriers publish BAF in USD. Your UK freight invoice converts this to GBP at the prevailing exchange rate. If the pound weakens, your effective BAF cost rises even if the USD rate holds flat. Ask your forwarder what rate they use and whether they apply a margin on conversion.
UK ports. BAF on Asia–UK lanes covers delivery to a UK port. It does not vary between Felixstowe and Southampton on most carrier tariffs, though inland haulage from each port differs majorly.
Customs value. BAF forms part of the freight cost element of your landed cost calculation. Depending on your Incoterms, it may be included in the customs value declared to HMRC. Check with your customs broker if you are unsure.
Freight forwarder transparency. You are entitled to a full line-item breakdown of your invoice. If a forwarder bundles BAF into a single “freight” figure without itemising it, ask for a detailed breakdown.
Scenario: A UK furniture retailer importing upholstered chairs, 1 × 20ft FCL, Ningbo to Felixstowe, Q1.
Their freight invoice:
| Item | Cost |
|---|---|
| Ocean freight (base rate) | £820.00 |
| BAF — Q1 Asia/North Europe rate | £145.00 |
| THC — origin (Ningbo) | £110.00 |
| THC — destination (Felixstowe) | £85.00 |
| Bill of lading fee | £45.00 |
| Total | £1,205.00 |
The shipping coordinator checks the carrier’s published Q1 BAF schedule online. The published rate is $184 per TEU. At the invoice exchange rate (£1 = $1.27), that converts to £144.88, rounded to £145. The charge is correct.
In Q2, the carrier updates its BAF to $196 per TEU (around £154). The next invoice reflects this. She knows the increase is a fuel price movement, not an error, and updates her landed cost calculations accordingly.
This is how BAF is supposed to work: transparent, traceable, and verifiable against a published source.
What does BAF stand for in shipping?
BAF stands for Bunker Adjustment Factor, a fuel surcharge added by container shipping lines to cover the variable cost of bunker fuel. It appears as a separate line item on your freight invoice, alongside the base ocean freight rate.
How often does BAF change?
Most major carriers update BAF monthly or quarterly. The effective date and rate are published on the carrier’s website. Some carriers give four weeks’ notice; others update on the first of each month.
Is BAF charged on LCL (less than container load) shipments?
Yes. BAF applies to LCL shipments as well as FCL. On LCL, BAF may be charged per cubic metre (CBM) or per freight tonne rather than per TEU, depending on the carrier and freight forwarder’s quoting structure.
Can BAF go down as well as up?
Yes. BAF is linked to fuel prices, which move in both directions. When crude oil prices fall, carriers reduce their published BAF rates. On a long-term contract with floating BAF, your costs can decrease as well as increase.
Why does BAF vary by trade lane?
BAF is trade-lane specific because voyage distance, vessel speed, and average cargo density differ by route. The Asia–UK lane is one of the longest container routes in the world, so fuel consumption per TEU is higher than, say, a short intra-European route. The trade factor used in BAF calculation reflects these differences.
Is BAF included when an agent quotes “all-in”?
Not always. When a freight forwarder quotes an “all-in” rate, confirm in writing whether BAF is included. Some forwarders exclude BAF and other surcharges from all-in quotes. Always ask for a full breakdown before accepting.
Does BAF apply to air freight?
No. BAF is a maritime surcharge only. Air freight uses its own fuel surcharge, typically called the Fuel Surcharge (FSC), calculated on a per-kg basis.
What is the difference between BAF and CAF?
BAF covers fuel costs. CAF (Currency Adjustment Factor) covers exchange rate fluctuations on routes where the carrier’s costs are in a different currency to the freight rate. They are separate surcharges and may both appear on the same invoice.
This article is part of a learning path — return to explore more topics.
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You just received a freight quote and one of the line items reads “BAF, £145 per TEU.” You have no idea what it means, whether