Marine cover
A lay-up credit is a promise, not a discount
You tell the carrier the boat will be out of commission between two dates, and the premium reflects the months you gave up. What makes it a warranty rather than a discount is what happens if you use the boat anyway.
Written by the AiM Insurance negotiation deskLast updated
The trade
Lower premium for the months the vessel is out of commission — not navigating, usually unmanned, at a location the policy names. The dates are a condition of the cover, not a description of your habits. Which means the credit is worth taking only if the dates on the policy and the season in your head are the same calendar, and the question to ask yourself is not “do I usually use it in March?” but “could I promise not to?”
What a lay-up period actually is
The vocabulary is old and the terms are precise. Most of the trouble owners get into with this clause comes from reading one of these words the way it is used in ordinary speech.
- Lay-up period
- The stated dates during which the vessel is declared out of commission. Written into the policy with the same force as the navigational limits, and breached the same way — by doing something, rather than by failing to notice something.
- In commission
- The rest of the year: the months in which the vessel may be used, subject to everything else the policy says. A policy with a lay-up warranty is really two policies with one premium, and the dates are the join.
- Lay-up ashore
- The vessel hauled and stored at a stated yard, usually blocked or cradled, sometimes de-masted, shrink-wrapped or covered as the clause specifies. Out of reach of sinking and surge, but exposed to fire, theft and yard handling.
- Lay-up afloat
- The vessel remaining in a named berth or marina, unmanned and not navigating. Every berth exposure stays with the carrier: storm, surge, dock failure, and the through-hull that lets go with nobody aboard.
- Freeze or winterization clause
- A separate condition, not part of the lay-up warranty, which typically excludes freezing damage unless specified protective steps were taken. Sometimes it asks for evidence, which means the yard invoice is worth keeping.
How the credit is priced, and why it is not pro rata
Owners reasonably expect six months of lay-up to halve a premium, and it does not. Understanding why stops the disappointment and, more usefully, tells you what to negotiate.
A marine hull premium is paying for two different kinds of exposure at once. The first only exists while the boat is being used: grounding, collision, striking submerged objects, operator error, and the liability that attaches to a vessel under way. The second exists whether or not anyone goes near it: fire, theft, vandalism, storm and wind, sinking at the berth, and handling damage in a yard. A lay-up removes the first and leaves the second more or less intact, so the credit tracks the navigation share of the risk rather than the number of months on the calendar.
That also explains two things owners notice and find odd. Lay-up ashore and lay-up afloat are priced differently, because they leave the carrier holding different halves of the second category. And extending a lay-up by a month at either end tends to return less than the months already in it, because what you are surrendering is navigation exposure — and there is far less of it to surrender in the shoulder of a season than in the middle of one.
The three arrangements, side by side
| Arrangement | What the owner undertakes | What the carrier is still carrying |
|---|---|---|
| In commission | Nothing beyond the ordinary policy conditions and the navigational limits | Everything the policy covers, navigation included — this is the full exposure the premium is built on |
| Lay-up afloat | The vessel stays in a stated berth or marina, unmanned and not navigating, for the stated dates — often with conditions about shore power, bilge pumps, mooring lines and access | Sinking at the berth, storm and surge, fire, theft, vandalism, dock and mooring failure |
| Lay-up ashore | The vessel hauled and stored at a stated yard, blocked or cradled, secured as the clause specifies, and not used for the stated dates | Fire, theft, vandalism, wind, yard handling and blocking failure, and flood where the site is exposed to it |
What each policy requires is written into its own lay-up warranty. These are the arrangements the clause describes, not a list of conditions any particular carrier imposes — ask your broker for the clause itself and read what it asks of you.
What the warranty asks of you
Read the clause with this list beside it. Every line is somewhere an owner has found out the hard way that the wording meant what it said.
- The dates, exactly as writtenCheck whether they are inclusive, and whether a time of day is stated. A lay-up that ends on the first of the month may not start being over on the thirty-first.
- The place, by nameA named yard or marina is a condition, not a convenience. Moving the boat to a different yard mid-lay-up is a change the carrier needs to agree.
- Not navigating, and not being usedIncluding the run to the yard and the run home. If the delivery leg falls outside the in-commission dates, that is a call to make first, not a technicality.
- Unmanned, where the clause says soLiving aboard during a declared lay-up is the kind of breach that is easy to arrange accidentally and hard to argue about afterwards.
- Whatever securing the clause specifiesCradle or stands, shrink wrap or cover, mast, canvas, batteries, shore power, bilge pump and high-water alarm. Do what it says, not what is customary at your yard.
- The winterizing steps, if there is a freeze clauseAnd the evidence. A yard invoice listing what was done is the cheapest proof you will ever be asked for.
- Notice, if any of it changesDates, location, arrangement. All three are endorsable and none of them is expensive to change in advance.
Check it yourselfWhat a lay-up warranty requires, and what breaching it does, is individual policy wording and differs between carriers and forms. Ask for the clause and its form number rather than relying on the summary line on the declarations page — that line is a summary of the contract, not the contract.
The afternoon that undoes it
A mild day in the middle of a declared lay-up. The engine gets run, the boat goes out for an hour, nothing happens, everyone goes home. The exposure is not that afternoon — it is the claim a fortnight later, and the question of whether the vessel was out of commission as warranted. What that does depends on the wording and on the law the policy is subject to: it may suspend cover for the period of use, or it may reach further. Either way it is an argument you do not want to be having, and the alternative was a phone call and an endorsement costing a fraction of the credit.
The trade-offs worth pricing
- A longer lay-up buys a bigger credit and fewer legal days on the water. Only you know your real season, and the honest answer is usually shorter than the one you would like to give.
- The shoulder months are where the credit and the calendar collide. The first warm weekend and the last one are exactly the days a lay-up warranty is most likely to be broken.
- A credit is not free money if the arrangement costs more. Hauling, blocking, shrink wrapping and winterizing have a price; compare the credit against the yard bill, not against zero.
- Selling or delivering the vessel during lay-up is a change of use and a change of location at once. Tell the broker before the buyer's surveyor arrives.
- A boat that goes south for the winter is the opposite of a boat in lay-up. That is a cruising area question, not a credit one.
- The credit can quietly disappear at renewal, or the dates can shift by a fortnight. Neither moves the premium enough to be obvious — it is found by reading the dec page, not the total.
What to ask, in writing
- Send me the lay-up warranty wording and its form number, not the summary.
- What are the exact dates, are they inclusive, and is a time of day specified?
- Is this lay-up ashore or afloat, and at which named location?
- What am I required to do to the vessel, and is any of it to be evidenced?
- Is there a separate freeze or winterization clause, and what exactly does it require?
- What happens if the vessel is used during the lay-up period?
- What does it cost to change the dates mid-term, and how much notice do you need?
- Quote me the policy with and without the lay-up, so I can see the credit rather than infer it.
Where this sits on a renewal
A dropped or shortened lay-up credit is one of the quiet ways a marine renewal gets more expensive without anything visible changing, which is why it belongs on the same list as the settlement basis and the cruising area. The full list is in why your boat or yacht insurance went up.
The clause it interacts with most directly is the one covering where you may take the vessel — see navigational limits and named-storm clauses, because time and place describe one season between them. The clause that decides what any of it pays is agreed value versus actual cash value, and the document an underwriter wants before writing either is a current marine survey. If the vessel is large enough that lay-up means a yard contract and a crew schedule, the yacht insurance page covers what that changes.
Common questions
What is a lay-up period on a boat insurance policy?
A stated period each year during which the vessel is declared out of commission — not navigating, usually unmanned, and at a location the policy names, either ashore at a yard or afloat in a berth. In exchange for that restriction the policy is priced lower for those months. It is written as a warranty, which means the dates are a condition of the cover rather than a note about how you tend to use the boat.
How much does a lay-up period reduce a boat insurance premium?
There is no market figure worth quoting, because carriers price it differently and the answer depends on the vessel, the location and whether the lay-up is ashore or afloat. What is predictable is the shape: the credit is not proportional to the months you give up, because a large part of hull risk — fire, theft, storm, sinking at the berth — continues whether or not anyone uses the boat. Ask your carrier to quote the policy both ways and compare the two figures rather than reasoning from a percentage.
What happens if I use my boat during the lay-up period?
It depends on the wording, and the possibilities range from a suspension of cover during the period of use to consequences that reach further than the trip. That uncertainty is the point: it is an argument you would be having after a loss, about a short run on a mild day that seemed harmless at the time. The cheap alternative is a call to the broker and an endorsement moving the dates, which is ordinary business and usually quick.
Is lay-up ashore cheaper than lay-up afloat?
They are priced differently because they leave the carrier with different exposure, and which one is treated more favourably depends on the vessel and the location. A boat ashore is out of reach of sinking and storm surge but exposed to fire, theft and the risk of blocking or handling failure in the yard. A boat afloat keeps every berth-related exposure there is. Ask for both to be quoted rather than assuming the yard is automatically the cheaper answer.
Do I have to winterize the boat during lay-up?
If the policy contains a freeze or winterization clause, then yes, and it is a separate condition from the lay-up warranty itself. Such clauses typically exclude damage caused by freezing unless specified steps were taken — draining or protecting engines, systems and plumbing — and some ask for evidence that the work was done. Keep the yard invoice. It is the cheapest evidence you will ever be asked for.
Can I change my lay-up dates?
Normally yes, by endorsement, and the time to do it is before the date you intend to move rather than after. Ask what notice the carrier needs and whether changing the dates changes the premium, because a shorter lay-up is a larger exposure and will usually be priced as one. What you should not do is decide on the dock that a single afternoon does not count.
Should I take a lay-up credit at all?
Only if the dates match the season you actually keep. A credit covering months you intend to use the boat is not a saving, it is a hole in the cover with a discount attached. If your use is genuinely seasonal and the vessel really does sit for months, the credit is one of the few marine levers you can ask for by name — and the trade is only good while the calendar on the policy and the calendar in your head are the same document.
Not sure your lay-up dates match your season?
Send the declarations page. We read the lay-up warranty against the way you actually use the boat, price the same terms across 50+ providers with the dates and the arrangement matched, and take the result back to your current carrier first. An answer either way within 24 hours.
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