Seaworthy is not a feeling, it is a budget. I used to think of it as a quality the boat either had or lacked, until a few seasons in France taught me it is really a running total: the antifoul, the anodes, the impeller, the rig check, the survey, all of it adding up to a hull that gets you home. Stop spending and the boat does not become unseaworthy overnight. It does it quietly, one skipped job at a time, until the morning it lets you down.
This is an attempt to put real numbers on that total for a foreign-owned boat kept in France, so you can decide with your eyes open rather than discover it line by line.
The rule of thumb, and why it is only a start
Ask any broker and you get the same answer: budget roughly 8 to 12 percent of the boat's value a year, often quoted as a round 10 percent, to cover maintenance, mooring, insurance, fees and routine repairs.
It is a useful sanity check and a poor planning tool. A 50,000 euro boat at 10 percent suggests 5,000 a year, which is broadly right, but the percentage hides where the money goes and lulls you into thinking it is smooth. It is not. Most years are quiet and cheap; then a survey year, a rigging-replacement year or a repower year lands and the figure triples. The honest way to budget is to cost the actual jobs on their actual cycles, which is what the rest of this does.
The annual costs you cannot skip
These are the jobs that come round every single year, and they are the core of staying seaworthy rather than merely afloat.
The big two are below the waterline and inside the engine bay. A yard antifoul on a 10 metre fibreglass cruiser runs 750 to 1,000 euros, far less if the yard lets you paint yourself, and the anodes that go on at the same time are a small extra worth renewing every year. An annual engine service for an auxiliary up to around 10 metres lands in the 250 to 900 euro range: oil, filters, a fresh impeller and the checks. The impeller alone, a part costing tens of euros, is the difference between a working engine and a dead one off a tidal gate, so it is the last thing to economise on.
Around those two sit the smaller fixtures: safety-gear renewals as flares and cylinders expire, sail and canvas repairs, the holding-tank hose and pump on their own slow cycle, and a diver clean or two if the boat lives on a Med berth and sails lightly. The paint choice and DIY rules that drive the antifoul figure are the whole of the antifouling and survey while based in France guide, and the timing that stacks all of this into one haul-out is the pre-season maintenance schedule for France worth working backwards from.
The costs that arrive on a longer cycle
The trap is the job you only meet every five or ten years, because it does not feel like an annual cost and then it ambushes you.
A survey is the clearest case. You commission one when you buy, when the insurer demands it on an older hull, and when something has gone wrong, and a full survey on an 11 to 12 metre boat runs broadly 1,000 to 1,500 euros. Spread that over the five years between surveys and it is a couple of hundred a year you should be setting aside but probably are not.
Standing rigging is the bigger one. Many makers call for replacement somewhere between ten and fifteen years, with a visual check every year and a professional inspection every five. A full re-rig is a four-figure job, often a large one, and the boat that skips it is the boat dismasting in a Biscay swell. Then there is the engine itself. Nurse an old diesel long enough and you face the question in the repowering a boat in France guide, where a 30 horsepower swap installed runs around 15,000 euros once the engine, the labour and the hidden peripherals are counted. None of these is annual. All of them are coming.
Where France changes the numbers
The jobs are the same as anywhere; the prices and the rules carry a French accent.
Labour here is charged at a French marine rate, with engineers earning around 32 to 34 euros an hour in salary terms and yards billing a commercial multiple of that, so a job quoted in hours costs what it costs and the boat being foreign-flagged saves you nothing. VAT applies to work done in France at the standard rate, including a repower, with no Brexit dividend on the labour. And French environmental rules shape the work: yards collect paint dust and washings under serious rules, many ports restrict in-water hull cleaning, and the discharge and waste regime catches the boat that ignores it, all of which is set out in the marina logistics, laundry, bins and pump-out in France guide.
Where France can save you money is the DIY question. An Atlantic yard that hands you a sander and a tarpaulin lets you do your own antifoul and tank work for the cost of materials, while a sealed-bay Med yard may insist its team does it. That single difference moves the annual figure by hundreds, so ask before you book the berth, not after.
Building a budget that survives the season
The way to make the total bearable is to separate the annual from the periodic and fund both, so the big years do not blow up the cheap ones.
I run two pots. The first is the annual seaworthy budget: antifoul, anodes, engine service, safety renewals, a diver clean, the small stuff. For a 10 metre boat that is a few thousand euros before the berth and insurance, and it is predictable. The second is a sinking fund for the periodic jobs: a slice each year toward the next survey, the eventual re-rig and the repower that will come one day. Fund the second pot in the quiet years and the expensive year does not ruin you.
That structure is the bones of the annual running costs of a boat in France guide, which adds the berth, the insurance and the wintering on top to give the whole-ownership figure. Seaworthy is the part you most want to get right, because it is the part that decides whether the boat brings you home.
The number, honestly
For a sound 10 to 12 metre cruiser kept in France, the seaworthy spend alone, before berth and insurance, sits in the low thousands of euros most years and several thousand in a survey or major-job year. The 10 percent rule of thumb roughly captures it across a decade, but only if you save in the cheap years for the dear ones.
One cost people forget to count is their own time, or the lack of it. A non-resident owner who flies in for a fortnight cannot stretch a job over a slow month the way a liveaboard can, so you either pay a yard to do what you might have done yourself, or you spend your precious cruising days on a ladder with a sander. There is no right answer, only an honest one: decide before the season which jobs you will buy and which you will keep, and budget the bought ones at full French labour rates rather than hoping you will find the time. The owners who run aground financially are usually the ones who assumed they would do everything themselves and then did not.
Keep every invoice, because a documented maintenance history is real money when you sell and the paperwork an insurer wants to see. The boat you maintain methodically is the boat that sells without a fight and the boat you trust off a lee shore. That trust is what the money buys, and on a coast like this one it is worth every euro.
