Pinterest tells advertisers to launch Q4 campaigns now, not November, as 55% of weekly users still shop post-Christmas

Pinterest is telling advertisers to launch festive campaigns as early as September, months before the traditional November ad rush, and to keep them running through the post-Christmas period it now calls "Q5."

The platform's own testing showed a 28% improvement in return on ad spend for small and midsize advertisers using Pinterest Performance+ campaigns with ROAS bidding, and it's positioning September as the last realistic window to test creative and build retargeting audiences before the Q4 pressure arrives.

55% of weekly Pinterest users continue buying online between Christmas and New Year's Day, with 45% still shopping in stores, which makes the extended campaign period commercially defensible rather than just a pitch for more ad spend.

Why September matters more than November

Pinterest says its users start festive activities as early as September, which places them in the research and comparison phase long before most brands go live. That early window is not about immediate conversions. It's about being present during the consideration journey, when product preferences are forming and purchase intent is still open to influence.

Shoppers often begin comparing products, saving ideas and forming purchase preferences months before the traditional November advertising period. By the time Black Friday arrives, many buying decisions have already been made. Brands launching in late November are competing for the minority who haven't yet decided, at the highest CPMs of the year.

The practical implication is that September is a testing phase, not a sales phase. Advertisers who use early seasonal moments (back to school, Halloween) to test creative, refine targeting and build engagement audiences have proven signals to scale into Q4. Those who wait until November are starting cold, with no data and no room for iteration before the peak spending window closes.

Pinterest's guidance reflects what our breakdown of Pinterest's AI campaign assistant covered in August: the platform is embedding automation deeper into campaign creation to lower the manual effort required to test and optimise at pace.

Performance+ is doing the work the brief said it would

In a recent study, advertisers saw an average incremental ROAS of 3.71, with more than half of those incremental sales coming from new buyers, and the incremental ROAS measured on Pinterest outperformed other platforms.

That's not a marginal improvement. It's the difference between a campaign that justifies its budget and one that gets cut in the next planning cycle.

Performance+ combines Pinterest's automation and AI features to simplify campaign creation and scale what's working. The 28% ROAS lift for SMB advertisers specifically matters because smaller advertisers typically lack the time, budget or internal expertise to manually optimise campaigns at the speed required during Q4. Automation that genuinely improves outcomes rather than just simplifying setup changes the accessibility calculation for Pinterest as a channel.

For brands already running Meta or Google campaigns, the question is whether Pinterest's intent-driven audience and lower competition during September justify the additional platform overhead. Based on the ROAS data and the timing advantage, the answer for visually-led product categories is probably yes.

As we noted when Pinterest launched its search-intent-first Promote a Pin tool, the platform is increasingly positioning itself as the channel where purchase intent is highest and creative complexity is lowest. Performance+ extends that logic into full campaign management.

Q5 is real, and most advertisers are missing it

The week between Christmas and New Year's Day extends the shopping season on Pinterest, with 55% of weekly users continuing to buy online and 45% still shopping in stores.

Pinterest is calling this period Q5, and the naming is deliberate. It reframes the post-Christmas week as a distinct commercial opportunity rather than a wind-down period where campaigns get paused and budgets get pulled.

Right after Christmas, customer behaviour completely shifts. They stop looking for gifts and start shopping for themselves or preparing New Year's Eve gatherings. Searches for "new years cocktails" jumped 9.8 times, while "NYE casual outfit" increased 30 times.

The behaviour change is sharp, and it's predictable. Advertisers who keep campaigns running but fail to refresh creative for the post-Christmas mindset are wasting the opportunity. The audience is still there, still spending, but they're no longer looking for gifts. They're looking for self-purchase, New Year planning and January refresh categories.

For social media marketers, this means campaign calendars need to extend beyond December 25, and creative briefs need to account for the shift from gift-focused messaging to personal or event-focused themes. Brands in fashion, home, food and beauty have the strongest fit, but the opportunity exists across most consumer categories.

What to actually do with this

Pinterest's guidance is clear, but the execution requirements are specific:

Before Q4 starts: Upload your product catalog and feed, settle on the goals and KPIs you will judge the season by, and refine your measurement strategy to capture true impact.

September and early October: Test creative during back-to-school, Halloween or other relevant seasonal moments. Build engagement and retargeting audiences. Identify which creative formats, product categories and audience segments are delivering the strongest signals.

Late October through November: Launch the full festive campaign, scaling budgets and creative based on what worked during the testing phase. Aim to go live as early as possible between September and November, then scale budgets and creative into Q4 using your best-performing ingredients, so you're building on proven signals instead of starting from scratch.

Post-Christmas: Refresh creative to reflect the behaviour shift from gift-buying to self-purchase and New Year planning. Keep campaigns running through December 31.

The approach requires more upfront planning than a traditional Q4 sprint, but it also removes the risk of launching untested creative into the highest-cost, highest-pressure window of the year. For brands where Q4 represents a significant portion of annual revenue, that de-risking is worth the additional September workload.

As we covered in our piece on Pinterest's luxury audience, the platform's user base skews toward higher-intent, higher-spending shoppers. The combination of that audience profile, the extended Q4 timeline, and the Performance+ ROAS improvements makes Pinterest one of the stronger cases for incremental ad budget this quarter.

The broader shift: planning beats sprinting

Pinterest's guidance reflects a wider industry reality. Q4 is no longer a sprint that starts in November. It's a months-long build that rewards early testing, sustained presence and the ability to iterate creative at pace.

Brands that treat Q4 as a November event will spend more, learn less, and convert worse than those who started in September. The platforms know this, which is why Pinterest, Meta and others are all pushing earlier campaign launches and longer runway periods.

For social media marketing teams, this shifts the pressure point. The work that used to happen in October and November now needs to happen in August and September. The trade-off is better data, lower costs during the testing phase, and proven creative to scale when competition and CPMs peak.

That's not a small operational shift, but the ROAS data suggests it's the right one.