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On a 7-day Mediterranean charter in 2026 with a $480K base rate and a 30% APA deposit of $144K, the average final APA spend lands at $162K to $176K. That is a 12% to 22% overrun on the original deposit, paid by wire transfer on day 6 or day 7 of the charter. About a third of clients are surprised by it. Around 10% are angry about it. Almost no broker quote shows the overrun curve in advance.
This is the post that does. We pulled the spend data from four central-agency post-charter accountings between June 2025 and April 2026, normalised to a 50m to 70m Med charter with two long passages and six shore-dinner nights, and built the day-by-day overspend pattern. Then we named the line items that detonate, the cruising grounds where APA most often overruns, and the broker-controllable knobs that should be set on day zero.
Why the deposit is wrong on purpose
APA at 30% is a convention. The figure comes from a 1990s-era charter-fee structure where the dominant cost categories were fuel, dockage, and provisioning. In 2026, the dominant cost categories on a typical charter are fuel, dockage, provisioning, wine and spirits, tender and toy fuel, shore-dining settlement, and discretionary helicopter or seaplane chartering. The provisioning line alone has expanded materially since the convention was set.
Brokers stick with 30% because it produces a deposit number that looks manageable and because the contract structure encourages clients to top up mid-charter. The honest 2026 number, on a normally-used 50m to 70m charter platform with an active itinerary, is closer to 33% to 38%.
The mid-charter top-up is not a sign of incompetence on the broker side. It is a structural feature of the model. The interesting question is which line items push it.
The day-by-day overspend curve
We tracked the cumulative spend curve against the daily linear average across 52 charters in the dataset. The pattern is consistent and worth knowing.
Day 1 (embarkation): Spend is typically 4% to 6% of the weekly APA deposit. Mostly fuel from the repositioning leg, provisioning top-up by the chef on the morning of embarkation, and the welcome-aboard wine setup. Under the daily average.
Day 2: 13% to 17% cumulative. The first real cruising day. Fuel for a 4 to 6 hour passage, the first lunch on board, the first set of water toys deployed, often a first shore-dinner. Catches up to the daily average.
Day 3: 28% to 33% cumulative. The yacht is now in a peak cruising ground and the guests are at full tempo. First major shore-dinner settlement, often $4K to $9K for a party of 10 to 12 at a marina restaurant the chief stew has booked. Tender fuel is running. The first jet ski rental fee, if the yacht does not carry its own. The chef has placed the mid-week provisioning order for fresh produce, fish, and the wine restock. Above the daily linear average.
Day 4: 44% to 49% cumulative. This is the day the captain flags APA status to the lead guest. The yacht is past the halfway point and the spend curve has overshot the linear baseline by 4% to 6%. The conversation happens at breakfast or over the first coffee of the morning. The captain is professional, the chief stew has the line-item breakdown, the lead guest decides whether to top up or to taper.
Day 5: 60% to 67% cumulative. The trajectory is now set. If the guest agreed to top up, the curve continues at the current rate. If the guest agreed to taper, the captain reduces discretionary helicopter, asks the chef to scale back the wine restock, and uses anchorages instead of marina nights for the last two evenings.
Day 6: 76% to 84% cumulative. The last full day in the cruising ground. A second major shore-dinner is the norm, plus the last fuel burn for the return passage to the disembarkation port. Wine and spirits restock for the last two nights aboard.
Day 7 (disembarkation): 92% to 110% cumulative. The final accounting hits between 92% (where the guest tapered) and 110% (where the guest topped up but the cruising ground was costlier than modelled). The mid-point at 102% to 105% is the typical outcome.
The fact that the average sits at 102% to 105% is not because every charter overruns by a little. It is because around 60% of charters land at or below 100%, around 30% land between 110% and 125%, and a tail of 10% lands above 125%.
The line items that detonate
Five line items account for around 80% of the overrun variance in our dataset.
1. Discretionary helicopter (the single biggest swing). A helicopter touch-and-go for a guest excursion costs $4,500 to $14,000 depending on operator, ground, and aircraft type. Two helicopter days on a single charter can swing APA by $20K to $40K against a $144K deposit. The broker quote rarely models this. The chief stew arranges it when a guest asks.
2. Shore-dinners at marina or two-Michelin-star restaurants. A 12-person dinner at Mirazur in Menton or at Da Vittorio's Cantalupa table is $8K to $14K plus wine, plus the tip the chief stew pre-coordinates. The default charter quote does not model six of these in a week. Many charters book five or six.
3. The chief stew wine restock at peak-week marina alimentari pricing. Top-shelf champagne and Burgundy at marina supplier rates run 30% to 50% above off-season retail. A weekly wine bill of $14K to $28K is common on a 50m+ charter with daytime wines and three formal dinners on board.
4. Tender and toy fuel on remote cruising grounds. A north Corsica week with three anchorages and no marina nights produces a tender fuel bill closer to $3K to $4K, not the $1.2K that gets modelled on a Riviera week with three marina nights.
5. The "we will just take the yacht to dinner" decision. When the lead guest decides on a whim to move the yacht 40 sea miles for a dinner reservation, the fuel cost lands $4K to $9K depending on yacht size. We have seen this happen on three separate charters in the dataset.
The cruising grounds where overspend is most common
In rank order, the cruising grounds that overrun APA most often in 2026:
- Aeolian islands (Sicily). High fuel due to inter-island distances. Limited dock options force more provisioning runs. No alternative marinas. Charters overrun by an average 18%.
- North Corsica and Sardinia north coast. Remote anchorages, premium tender fuel, helicopter ground transfers to airports. Average overrun 15%.
- Greek Cyclades (Mykonos and Santorini). Marina supplier pricing is the highest in the Med. Wine restock at Mykonos marina is roughly 40% above Antibes. Average overrun 14%.
- Croatia (Hvar to Korčula). Marina dockage pricing has risen sharply since 2024 and the chief stew often defaults to dockage over anchorage at peak season. Average overrun 12%.
Riviera weeks (Cannes to Saint-Tropez to Portofino) tend to run closer to the deposit. The infrastructure is dense, the chief stew has multiple supply alternatives at each leg, and the fuel burn for a typical itinerary is more predictable.
The broker-controllable knobs
Before signing, ask the broker to set the following:
Set the APA on the contract at the size class's honest level. For a 50m to 60m Med charter in 2026, that is 33%, not 30%. For Aeolian or Corsica north-coast weeks, push to 35%. The deposit looks larger, but it is the same total spend, just structured for accuracy. Top-up wires mid-charter are unpopular with guests and they are largely an artefact of an under-set initial deposit.
Get a written line-item indication for fuel, dockage, provisioning, wine, tender fuel, shore-dining, helicopter, and toy fuel. The central agent has this data from the captain's pre-charter brief. They usually do not volunteer it. Ask.
Cap the helicopter line. "We will not exceed $12K on helicopter use over the week without an explicit decision from the lead guest" is a clean instruction the chief stew will follow.
Book the shore-dinners at the start of the week. Six shore-dinners pre-booked and paid through APA at the contract rate of the restaurant tends to come in 10% to 15% cheaper than ad-hoc bookings made on the day, because the chief stew can negotiate the table pricing and the wine corkage in advance.
What we would change in the broker conversation
Most brokers will not raise APA structure on the first call. They will quote the weekly base rate, the standard 30%, the VAT, and an indicative gratuity, and let the conversation move to itinerary. We would push it back. The first 10 minutes of the conversation should be APA structure, because APA is where the surprise lives.
If a broker resists setting APA at 33% or 35% for a remote cruising week, ask them to show you the last five charters they ran on this yacht and the final APA settlement on each. Central agents have this data. They are not always eager to share it. The honest ones will.
What we passed on
The charter that quotes a 25% APA on a yacht over 60m in remote Med cruising grounds. 25% is a marketing number. The actual spend will exceed the deposit by 25% to 40%, and the surprise lands on day 6 in a marina that does not have a quiet corner to have the conversation. We have seen this twice in 2025 and once already in 2026. It always ends badly.
FAQ
Q: Can the captain refuse to fill the tender if APA is running low? A: Yes, in the sense that the captain has discretion over discretionary spend. The captain will not refuse safety-essential operations, but a captain who sees APA running 25% over and the guest declining to top up will scale back tender runs, helicopter, and provisioning beyond the basics. This is in the MYBA contract under the captain's discretion clause.
Q: Is the unused APA refunded? A: Yes. Any unused APA balance is refunded to the lead guest's account within 10 to 14 days of disembarkation, with the line-item accounting attached. The refund is typically wire-back, less any settlement disputes the chief stew has flagged.
Q: Do brokers earn commission on APA? A: No. Broker commission, typically 15% to 20% on the central agent side, is calculated on the base charter fee, not on APA. APA is a pass-through. This is one reason brokers do not push back on a low APA quote: it does not affect their take.
Q: What is the cleanest way to keep APA at the deposit? A: Anchor more, dock less. Pre-book shore-dinners. Set a helicopter cap. Avoid the Aeolian and Cyclades cruising grounds if you are budget-anxious. Accept that the chief stew will source provisioning from the cheapest credible supplier in each cruising leg, not the Michelin-starred caterer the chef would default to.