Q5 conversions up 25%: the new post-Christmas selling season

The week between Christmas and New Year has transformed into a distinct selling season, with conversion rates climbing 25% in 2025 compared to 2024, according to data from advertising platform MNTN. The shift is forcing fashion retailers to rethink merchandising strategies, stock holding and promotional calendars for what some are now calling Q5.

The conversion surge reflects changing consumer behaviour as shoppers increasingly use the post-Christmas period to spend gift cards, exchange unwanted items and hunt for early winter sale bargains. For merchandisers, the implication is clear: the final week of December can no longer be treated as dead air between the Christmas rush and January clearance.

What is driving the Q5 conversion spike?

Several factors are converging to create a new peak trading period. Gift card spending is concentrated in the immediate post-Christmas window, when recipients are motivated to redeem value whilst the gifting occasion remains fresh. Returns and exchanges bring customers back into stores and onto websites, creating secondary purchase opportunities. Many consumers now delay discretionary purchases until after Christmas, anticipating early sales whilst avoiding the pre-holiday rush.

The rise of mobile commerce has removed friction from these transactions. Shoppers can browse and buy from family gatherings, whilst retailers can adjust pricing and inventory in real time. The result is a compressed but intense selling period that demands tactical agility.

How should merchandisers plan for Q5?

Traditional merchandising calendars treated the Christmas to New Year period as operational downtime, with skeleton staffing and minimal promotional activity. The 25% conversion increase suggests this approach is leaving revenue on the table. Merchandisers now face three key planning challenges.

First, stock levels must be calibrated to support Q5 demand without creating excess inventory in January. This requires more granular forecasting and tighter collaboration between merchandising and supply chain teams. Second, promotional calendars need adjustment. Starting winter sales on Boxing Day may cannibalise Q5 margins, whilst waiting until January risks missing the conversion window entirely. Third, product mix must reflect Q5 customer needs: gift card recipients often favour everyday essentials and core styles over statement pieces.

What are the stock holding implications?

The Q5 phenomenon complicates an already difficult inventory equation. Retailers must carry sufficient stock to meet Christmas demand, then maintain selection through the post-Christmas period, before entering January clearance. The risk of overstock increases with each additional selling phase.

Some retailers are responding with more conservative holiday buys, preserving inventory capacity for Q5 replenishment. Others are using the post-Christmas week to test products and prices ahead of the main January sale. Both approaches require supply chain flexibility and accurate demand sensing. The alternative is stock-outs during a high-conversion window or excess inventory that erodes first-quarter margins.

How are promotional calendars changing?

The traditional retail calendar divided winter into three phases: pre-Christmas full price, Boxing Day sales and January clearance. Q5 is fragmenting this model. Retailers are experimenting with staggered discounting strategies that capture different customer segments across the post-Christmas week.

Common approaches include:

• Holding full prices on core and gift-driven categories through 31 December
• Offering targeted promotions to gift card holders and loyalty members
• Running flash sales on specific categories to drive traffic without broad markdowns
• Using dynamic pricing to test demand elasticity in real time

The goal is to maximise revenue per visitor during the high-conversion Q5 window whilst preserving pricing power for the January clearance event. Execution requires coordination across merchandising, marketing and e-commerce teams, as pricing signals must be consistent across channels.

What does Q5 mean for supply chain operations?

Supply chain teams face compressed timelines and split priorities during Q5. Warehouse operations must simultaneously process Christmas returns, fulfil Q5 orders and prepare for January sale volume. Staffing patterns designed for a quiet post-holiday week are inadequate for a 25% conversion increase.

Distribution centres are extending holiday operating hours through New Year, whilst some retailers are adding temporary capacity specifically for the Q5 window. The alternative is service failures during a high-value selling period. For international supply chains, the challenge is acute: the post-Christmas week offers little time to replenish stock before the January peak.

Is Q5 a permanent fixture?

Whether the Q5 phenomenon persists depends on consumer behaviour, competitive dynamics and economic conditions. The 25% conversion increase suggests structural change rather than a one-year anomaly, particularly as mobile commerce and gift card penetration continue to grow. However, if retailers flood Q5 with promotions, they risk training consumers to expect discounts and eroding the full-price opportunity.

For now, merchandisers are treating Q5 as a distinct planning cycle. That means dedicated stock allocations, tailored promotional strategies and adjusted operational cadences. The retailers that adapt fastest will capture incremental revenue during a week that was recently an afterthought. Those that cling to traditional calendars may find themselves understocked, underpriced and outpaced by more agile competitors.