Fuel is the cost of ambition, and the line most likely to overrun the float that pays for it. Here is how it is billed, what a yacht of each size actually burns, and where the surcharge bites.
Fuel does not appear as a fixed figure on a charter quotation, and that is precisely why it surprises. It is drawn from the Advance Provisioning Allowance at the prevailing dock price, which means the principal carries both the consumption risk and the price risk — and on an active itinerary either can force a mid-charter top-up. There is no “fuel surcharge” line on a brochure, yet fuel is routinely the largest single APA outflow. This page sets out how marine fuel is billed, how much yachts of different sizes consume, and how a surcharge materialises when neither price nor route was pinned down in advance.
Under standard MYBA terms a charter fee buys the yacht standing by; it does not buy a drop of the fuel she burns under way. Fuel is paid from the Advance Provisioning Allowance — your pre-paid float — at the actual dock price the captain pays, with no mark-up permitted. This is why the APA for a motor yacht is set higher, at 35–40% of the base fee, than for a sailing yacht: the float must absorb a fuel bill that no one can fix in advance because no one yet knows the route, the speed or the price on the day.
The consequence is that the principal, not the owner, bears the fuel risk in both its forms: consumption risk, the litres burned, which the itinerary dictates; and price risk, the cost per litre, which the market and the location dictate. A so-called fuel surcharge is simply what happens when one or both run higher than the APA assumed, and the captain requests a top-up to keep the float in funds. It is not a hidden charge; it is the float meeting reality. Understanding that fuel is a variable cost you control through route and speed — not a fixed fee you can negotiate — is the first step to keeping it in hand.
A superyacht's appetite is governed by her size, her hull and, above all, her speed — fuel burn rises roughly with the cube of speed, so a modest increase in pace produces a steep increase in consumption. The figures below are indicative hourly burn rates at a relaxed cruising speed for typical motor yachts; push toward maximum speed and they can double or treble.
| Yacht size | Cruising burn (litres/hour) | 8-hour transit day (fuel) |
|---|---|---|
| 30–40 m | 150–250 L | €1,700–€3,200 |
| 40–50 m | 250–400 L | €2,800–€5,100 |
| 50–70 m | 400–700 L | €4,500–€9,000 |
| 70 m and above | 700–1,500 L+ | €8,000–€19,000+ |
Figures assume a dock price around €1.40–€1.60 a litre. The table makes the central point plain: the same yacht costs a fraction as much at anchor as under way, and a week of genuine passage-making — 400 to 600 nautical miles on a 50-metre yacht — consumes €15,000–€30,000 in fuel, while a languid week of short hops between nearby anchorages might consume a quarter of that. The itinerary is the fuel budget.
A fuel surcharge is rarely a single event; it is the cumulative result of choices made on the water. It materialises in three ways. First, through route: a principal who decides mid-charter to make a long passage — the Amalfi coast on a whim, the Balearics to the mainland and back — burns fuel the APA never budgeted. Second, through speed: a captain asked to make a distant lunch reservation must lift the revolutions, and because burn scales with the cube of speed, a request to “get there quickly” can cost several times a relaxed passage. Third, through price: refuelling in an expensive harbour, or during a market spike, lifts the per-litre cost above the APA's assumption.
When any of these pushes spend past the float, the captain — obliged to keep the APA in credit — requests a top-up, and that top-up is what the principal experiences as a surcharge. The defence is not to resent the request but to anticipate it: agree an indicative itinerary and cruising speed before departure, ask the broker to model the fuel cost from that itinerary, and treat any material deviation as a budget decision taken in the moment. A captain who provides a daily fuel log lets you see the float drawing down in real time, so a top-up is never a shock.
Marine gas oil prices through 2026 have sat in a broad band of roughly €1.35–€1.70 a litre at Mediterranean dock prices, with the figure moving on crude markets, refining margins and, increasingly, environmental levies. The headline price, though, is only part of the story; where a yacht bunkers can shift the effective cost by a wide margin. Fuelling alongside in a marquee harbour carries a premium over taking on fuel at a commercial bunkering point, and a yacht that can lawfully bunker duty-free while on a qualifying charter pays materially less than one taking fuel at full domestic duty.
This is where a capable captain earns the fee. The choice of bunkering port, the timing of the fill against a known market move, and the eligibility for duty relief on a commercial charter are all levers that move the fuel line without changing your itinerary. They are also matters of compliance — duty relief is legitimate only where the charter genuinely qualifies — so they belong with a professional crew and a vetted central agent rather than with guesswork. The principal's role is simply to ensure the question is being managed: a good operation bunkers thoughtfully, a poor one fills wherever is convenient and passes the premium to your APA.
Consider a 50-metre motor yacht on a classic Riviera-to-Italy week — Cannes, Saint-Tropez, Portofino, the Ligurian coast — covering perhaps 450 nautical miles over the seven days at a relaxed pace, with two longer passage days and several short hops. At an indicative 500 litres an hour under way and a dock price of €1.50 a litre, the fuel arithmetic looks like this.
Now change one variable. Ask the same yacht to make every passage at speed rather than at a cruise, and the fuel line can climb toward €40,000 or beyond — the surcharge, made visible. The lesson is not that fuel is unpredictable but that it is governed by decisions you make: pace and distance. Reconcile the itinerary against a modelled fuel budget before departure and the float holds; treat the yacht as a sports car and it will not.
Fuel cannot be fixed to a single number, but it can be brought firmly within expectation. The work is done before departure and maintained through a single discipline on the water — visibility of the float.
Handled this way the so-called surcharge disappears as a category. There is only the fuel you chose to burn, billed at cost, visible as it is spent — which is exactly how a well-run charter should feel.
We do not sell yachts and we do not let a fuel line surprise you. Through the Obsidian Helm Marketplace we source and vet vessels and crews on your behalf, modelling the fuel cost from your actual itinerary and cruising speed before a contract is signed and introducing you only to operations that keep a transparent daily fuel log. Your advisor confirms the bunkering and duty position, sets a sensible APA contingency and remains your point of contact throughout — all under NDA. Our remuneration comes by referral arrangement with vetted brokers, never from a mark-up on your APA or your fuel, which keeps our counsel candid. Request a private introduction to begin.
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Not as a line on the quotation. Fuel is drawn from the Advance Provisioning Allowance at the actual dock price with no mark-up. What principals experience as a surcharge is a mid-charter APA top-up requested when consumption or price runs higher than the float assumed, usually because of a longer or faster itinerary than was budgeted.
At a relaxed cruising speed, roughly 150–250 litres an hour for a 30–40 metre yacht, 250–400 for 40–50 metres, 400–700 for 50–70 metres, and 700–1,500 litres or more above 70 metres. Because burn rises with the cube of speed, pushing toward maximum speed can double or treble these figures.
Because the float must absorb a far larger fuel bill. Motor yachts typically carry an APA of 35–40% of the base fee against 25–35% for sailing yachts and catamarans, precisely because fuel is the largest variable cost and cannot be fixed in advance when route, speed and dock price are all unknown until the charter is under way.
Marine gas oil sat in a broad band of roughly €1.35–€1.70 a litre at Mediterranean dock prices through 2026, moving on crude markets, refining margins and environmental levies. The effective cost also depends heavily on where a yacht bunkers and whether the charter qualifies for lawful duty relief, which a capable crew manages.
Have the broker model fuel from your real itinerary and cruising speed before departure, agree a relaxed pace as the default and treat going faster as a costed decision, and insist on a daily fuel log so the APA draws down visibly. A sensible APA contingency then absorbs a market move or a spontaneous passage without a mid-charter scramble.
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