Q4 Does Not End on 31 December

Almost every Q4 plan stops on 31 December. Budgets are switched off, the team goes quiet, and the season is declared over. Then in the second week of January somebody notices that orders kept arriving, that acquisition cost fell sharply, and that the brands still advertising had the auction largely to themselves. The period between Christmas and mid January is the cheapest trading of the whole season, and it is routinely handed to whoever could be bothered to plan for it.

Q5 is the informal name for the window between Christmas and the middle of January. It sits outside the normal quarterly calendar and behaves differently from both December and February, because consumer intent stays high while most advertisers withdraw their budgets.

Why Does It Get Cheaper?

Because the demand side of the auction collapses while the supply of attention does not. Retail advertisers who spent heavily from October through to the gifting deadline pause or cut budgets the moment that deadline passes, often for straightforward reasons: the budget is exhausted, the team is on holiday, or the plan simply ended.

Meanwhile the audience is still there. People are at home, on their phones, with time, gift cards and a set of intentions about the year ahead. Fewer bidders competing for that attention means the same inventory clears at a lower price. It is the exact inverse of the mechanism that made November expensive, which we set out in our post on Q4 CPM inflation, and it is just as predictable.

Who Is Shopping, and For What?

A different person from the one you sold to in December, which is the part that catches brands out.

December's shopper was buying for somebody else, working to a deadline, worried about delivery and sizing. January's shopper is buying for themselves. Gift cards are being redeemed. Exchanges are turning into new purchases. And the reset mindset that arrives with a new year shifts demand towards routine, home, organisation and self-improvement rather than occasion and celebration.

That shift is a messaging problem more than a targeting one. Gifting creative that performed brilliantly on 15 December reads as out of step by 28 December, and a brand running the same assets into January is advertising to a person who no longer exists.

Should You Keep Spending?

For most brands yes, on one condition: contribution margin per order still clears the floor you set in September. That test does not change because the calendar did, and it is the same discipline described in our post on the four numbers to set before October.

Assuming it clears, switching off entirely is hard to justify. You would be declining cheaper access to the same inventory you paid a premium for six weeks earlier, and abandoning the retargeting pools and subscriber lists that Q4 spending just built. The audience is at its largest and the price is at its lowest in the same fortnight, which is not a combination that occurs often.

There is a second use for the window that is easy to miss. Cheap impressions make January an unusually good month to test creative concepts you intend to scale later in the year, because a failed test costs a fraction of what it would cost in November. Brands that treat January as a testing budget rather than a trading budget often get more out of it than brands that simply keep selling.

What Should Change?

Four things, none of which take long if they were built in advance.

Creative shifts from gifting to self-purchase. Routine, renewal, getting set up for the year, using the thing properly. The same products, a completely different frame.

Offers get quieter. A January sitewide discount immediately after a Q4 one teaches your entire customer base that your prices are negotiable year round, and it lands on the cohort you least want to train that way. Targeted, time-bound offers to specific segments do the job without the collateral damage, per our BFCM offer strategy post.

Retargeting changes job. The Q4 cohort should be receiving product education and next-purchase messaging rather than another discount, because serving discount creative to people who just bought at a discount entrenches exactly the behaviour you are trying to unwind. That whole programme is covered in post-holiday retention.

Site messaging follows the buyer. Returns and exchanges are about to arrive in volume, and an easy exchange journey converts a return into a sale rather than a refund. Make exchange more obvious than refund, and use the moment to introduce the recipient of a gift to your brand, since they are the person who will actually use the product.

Why Does This Have to Be Planned in September?

Because nobody builds anything useful in the last week of December. The team is depleted, attention is elsewhere, and the window opens whether or not you are ready for it. Budget has to be reserved rather than spent, creative has to exist rather than be briefed, and the flows have to be live rather than planned.

Practically, that means three decisions taken now, alongside the rest of the Q4 plan. Reserve a January budget line and protect it from being absorbed by November. Commission the self-purchase and renewal creative in the same production run as the gifting assets, since it costs very little extra while the shoot is already happening. And build the January segments and flows in October, when there is time to do it properly. The sequencing sits in our peak trading calendar.

How Do You Judge It?

On the same numbers as the rest of the quarter, not on softer ones. Contribution margin per order against the floor, new customer acquisition cost against baseline, and the second-order rate of the Q4 cohort, which is the figure that tells you whether peak built a customer base or rented one.

Judge the testing separately. Creative validated cheaply in January that goes on to scale in March is worth more than the revenue it generated at the time, and measuring it against a trading target undersells it.

The Bottom Line

The season does not end because the calendar year does. Intent persists, competition withdraws, and the combination makes the fortnight after Christmas the cheapest trading available in Q4. Keep spending while margin clears the floor, change the creative from gifting to self-purchase, keep the discount quiet, use the cheap impressions to test, and decide all of it in September, because nobody is going to build it on 28 December.

Our Biggest Q4 Guide Lands Soon

The full Q4 Profit Playbook is nearly finished, and it treats January as part of the season rather than the recovery from it. Our newsletter list gets it first. Join at webtopia.co/newsletter to be first to get it, plus every platform change that matters each Tuesday in Beyond the Clicks.

Want a January Plan While There Is Time to Build It?

Book a call and we will set the budget, creative and segments for the Q5 window before the quarter starts, part of how we work as an ecommerce marketing agency and an ecommerce paid media agency.

Frequently Asked Questions

What is the Q5 trading window?

The period between Christmas and the middle of January. It sits outside the normal quarterly calendar and behaves differently from both December and February, because intent stays high while most advertisers withdraw.

Why does advertising get cheaper in January?

Because the demand side of the auction collapses. Retail advertisers pause or cut budgets once the gifting deadline passes, so the same inventory clears at a lower price.

What do people buy in the Q5 window?

Largely for themselves. Gift cards get redeemed, exchanges turn into new purchases, and the reset mindset drives routine, home and self-improvement categories.

Should you keep advertising after Christmas?

For most brands yes, provided contribution margin per order still clears the floor. Switching off declines cheaper access to inventory you paid a premium for six weeks earlier.

How should creative change in January?

From gifting and offer-led messaging to self-purchase, routine and renewal, because the buyer has changed from choosing for another person to choosing for themselves.

When should the January plan be made?

Before Christmas, ideally in September. Budget, creative and flows need to exist before the window opens.