The Seasonal Stock Clause: The Extra Cover You Already Have
What is the seasonal stock clause in business insurance?
The seasonal stock clause automatically lifts your stock sum insured by 50% during your busy season, without you asking for it and without telling the insurer in advance. It exists because insurers know a single stock figure cannot be right in both February and December, and it switches itself on when your trading runs materially above your own yearly average.
Most business owners have never heard of it. That is the problem worth fixing, because a benefit you do not know about is a benefit you cannot check, and this one has edges you can outgrow without noticing. In this guide from Consolidated Insurance Brokers you will see exactly how the clause turns itself on, how long it runs, what proof you need if you claim during it, and the two situations where it quietly stops covering your real peak.
How does the automatic seasonal increase actually work?
On most of the business pack wordings we place it works off your own trading figures rather than the calendar. Any period where your turnover, sales or stock levels run at least 20% above your average for the rest of the year is a seasonal increase period, and during it your stock sum insured lifts by 50% automatically.
Read that again, because the trigger is the part people get wrong. On those wordings it is not "December". It is not "the school holidays". It is a measured comparison against your own averages, which means the clause fits a florist whose peak is Mother's Day, a pool shop whose peak is October, and an agricultural supplier whose peak is whenever the season breaks. If your figures move 20% above your own normal, the clause is working for you, whatever month it happens to be. One wording on the panel does it the other way round, naming the seasons instead, and the next section explains why that matters.
The uplift itself is proportional, not a fixed dollar amount, so it scales with the figure you already carry. If your stock sum insured is $200,000, the clause carries you to $300,000 through the peak. If your stock is bundled inside a single contents sum insured rather than shown separately, the wordings apply the increase only to the stock portion of that figure, not to the whole thing.
How long does the seasonal increase last?
Typically up to 126 days in total across your policy year. That is the aggregate cap on almost every business pack wording we place: not 126 days per peak, but 126 days added up across every peak in the year, which is roughly four months of the twelve.
One wording on the panel does it differently, and the difference matters if it is yours. Instead of a day cap, it names the seasons directly: the weeks either side of Christmas, the weeks either side of Easter, and a defined window around other festive, religious or ethnic events where you can show the 20% lift. Inside Christmas and Easter it asks for no 20% test at all, they simply are seasonal increase periods.
That cuts both ways, and it is worth understanding rather than assuming it is worse. A retailer whose peaks are exactly Christmas and Easter is arguably better off, because those two named windows run to about nineteen weeks between them, which is longer than the 126 days the other wordings cap you at. But if your peak is agricultural, industrial or tied to a trade cycle rather than a public celebration, a wording built around festive seasons may not recognise your busy period at all unless you have it endorsed on. That is not a defect. It is a reason to know which of the two shapes you are actually on.
Do you have to tell the insurer when your busy season is?
No. On the wordings we place you do not have to nominate your dates in advance, and there is nothing to apply for. The cover is already in the policy. What you do have to do is prove it after the fact if you claim during a peak, and that is where the clause catches people out.
If a claim lands in what you say was a seasonal increase period, most of the wordings ask for financial records covering at least the previous two years to substantiate that the period really was a genuine spike above your own average. Not an invoice, not a stocktake, and not your recollection: your own trading history, on file, showing the pattern. If your business is less than two years old, those wordings use your figures from the date you started trading instead, so a newer business is not shut out. The wording that names its seasons instead asks for records only for the events it has not already named, which is one of the few places it is the easier document to satisfy.
Two practical consequences follow, and they are the reason this section exists. First, the paperwork that proves your peak is the same paperwork your accountant already produces, so this is a filing habit rather than a project. Second, if you have never actually looked at whether your peak clears the 20% bar, you do not know today whether the clause will pay you at all. That is a five-minute check, not a claim-day surprise.
Where does the seasonal increase stop helping you?
At two edges, and both of them are yours to measure rather than the insurer's to warn you about.
The first edge is height. The uplift is 50%, so it carries you to one and a half times your base figure and no further. A business whose stock genuinely triples before its peak has a base figure doing the work for a third of the year and falling short for the weeks when there is most in the building to lose. The wordings we place do let you nominate a higher percentage by endorsement on the schedule, which is a conversation with your broker rather than a limitation you have to accept.
The second edge is width. The day cap is an annual aggregate. A business with several peaks, or one long trading season, can use it up. Once you are past it, you are back to your base figure, whatever your shelves look like.
There is a third point that is not an edge so much as the foundation under both of them. The seasonal clause lifts your base figure by a percentage, so if the base figure is wrong, the clause faithfully lifts a wrong number. Stock is insured for what it cost you, not what you sell it for, which means the figure to carry is cost price plus freight and duty rather than the retail value on your sales report. And your stock sum insured is tested for underinsurance against its true value at the start of your policy period, in exactly the same way a building's sum insured is. If it falls short, a partial loss can be scaled down in proportion, while a total loss pays your full sum insured and no more. The maths behind that is worked through in The Co-Insurance Clause: What Every Building Owner Must Know, and this page will not repeat it.
One wording on the panel makes the connection explicit: it counts the seasonal increase into the underinsurance calculation itself, so the uplift is treated as part of the figure being tested rather than sitting outside it.
Does the seasonal increase apply to anything other than stock?
Yes, and this is the part almost nobody knows. The same seasonal increase period that lifts your stock cover also lifts other sections of the policy that carry the benefit. On the wordings we place, the stock sum insured under the theft section lifts by 50% during the same period, and so does the sum insured for money, which matters enormously for a retailer taking three times the usual cash and card float through a peak trading week. Check the detail on the theft one, because the wordings disagree about whether tobacco and alcohol ride along with it or are carved out.
There is an interaction worth knowing about there. At least one wording gives you an automatic uplift on money cover over gazetted bank and public holidays, and expressly says that holiday uplift does not apply on top of a seasonal increase. So the two benefits do not stack. During your peak you are on the seasonal uplift, not the seasonal uplift plus the holiday one.
None of this is unusual or hidden. It is simply spread across three or four different sections of a document nobody reads end to end, which is exactly the kind of thing that should be checked for you rather than by you.
What should you do with this?
Three questions, and you can answer all of them before your next renewal.
- Does your peak actually clear the 20% bar? Pull last year's monthly figures. If your busiest month sits less than 20% above your yearly average, the clause never switches on for you, and your base figure has to be right all year.
- Is your peak higher than 50% above your base, or longer than the day cap? If it is either, the automatic uplift is not enough on its own, and an endorsed higher percentage or a declared-values arrangement is the conversation to have.
- Is your base stock figure at cost price, and is it current? The clause lifts whatever number is sitting there. It cannot fix a number that was set three years ago.
That is the whole job. It is not complicated, it is just nobody's job by default, and it is precisely the sort of check that separates a broker who reads your wording from one who renews it.
Have us check your stock cover against your real peak
Frequently asked questions
What records do I need if I claim during my busy season?
Your own trading history, and more of it than most owners keep to hand. Most of the wordings we place ask for financial records covering at least the previous two years, showing that the period really did run above your normal. A business trading for less than two years uses its figures from the date it started instead. The practical point is that this is your accountant's ordinary output rather than anything special, so the work is filing it, not producing it.
What counts as a seasonal increase period?
Any period where your turnover, sales or stock run at least 20% above your own average for the rest of the year, on most of the wordings we place. It is measured against your figures, not against a calendar, so a spring peak or a harvest peak qualifies just as a Christmas peak does. One wording on the panel instead names Christmas, Easter and other celebrated events as its windows, which is a genuine difference worth checking on your own schedule.
Does the seasonal increase cover me if my stock doubles?
Only part of the way. The automatic uplift is 50%, so it carries a $200,000 stock figure to $300,000, not to $400,000. If your real peak runs higher than one and a half times your base figure, the gap above that is uninsured unless you have arranged a higher percentage by endorsement or a declared-values arrangement. Measuring your true peak once is what turns this from a guess into a decision.
Does the seasonal increase fix underinsurance on my stock?
No, and it is important not to rely on it that way. The clause lifts your existing sum insured by a percentage, so it magnifies a good figure and equally magnifies a poor one. Your stock cover is still tested against its true value at the start of your policy period, and if it falls short, a partial loss can be reduced in proportion while a total loss simply pays your sum insured and stops there. How that test works is set out in The Co-Insurance Clause: What Every Building Owner Must Know.
Related reading
- The Co-Insurance Clause: What Every Building Owner Must Know: the canonical home of the average-clause maths this article deliberately does not repeat.
- Retail insurance: the product page for shop owners, including the fit-out gap that sits alongside this one.
- Warehouse insurance: the same stock problem at scale, plus goods you are minding for someone else.
- Business insurance: the business pack these clauses live inside.
- Insurance terms glossary: sum insured, average clause, and the rest of the vocabulary.