Most small businesses build their holiday ad budget backward. They fix a total figure first and only decide where it goes once November arrives, by which point Black Friday auction prices have already moved. The real decision is not the total spend, but which platform earns the marginal dollar once the obvious buckets are filled. That answer changes between October and January, and treating it as fixed costs real money.
Why the last dollar costs more in November
The 2026 holiday season is not a quiet backdrop for testing ad ideas. Adobe expects U.S. consumers to spend a record $275.1 billion online this holiday season, up 6.7% year over year. Cyber Week, the five-day period between Thanksgiving and Cyber Monday, is expected to drive $47.5 billion of that total, up 7.4% on last year. That demand pulls every competitor into the same auctions at once, and cost follows close behind.
Thanksgiving falls on Thursday, November 26, 2026, so Black Friday lands on November 27 and Cyber Monday on November 30. Auction prices move with those dates well before they arrive. CPMs across all markets spike 30 to 60 percent during October through December because of holiday advertising competition. In the US, CPM can exceed $30 during Black Friday and Cyber Monday alone.
During BFCM week, Facebook CPMs have jumped from $8 to $15 to $20, and Google Display CPMs have moved from $3 to $6 to $8. That range gives a planning anchor: whatever a normal week costs, double it for the last week of November. A budget built on October prices runs out before the peak day arrives.
Where Google, Meta and TikTok sit on cost and intent
Each platform earns its place in the split for a different reason, not because one beats the others on every measure. TikTok's average CPM sits between $3.50 and $10, against Meta's $7 to $15 range, a gap of roughly 47 percent. That gap matters less than it looks, because CPM only measures how cheaply an ad appears, not whether anyone buys afterward.
Google Search carries a 2026 average cost per click of $5.42, a 6.64 percent click-through rate, and an 8.18 percent conversion rate. Search ads cost more per click than social impressions, but they reach shoppers who already typed the product name. That is a different job from a Meta or TikTok feed ad, and the budget split should reflect it rather than chase the cheapest number on a chart.
Minimum spend floors decide whether a test is even readable. TikTok sets a $50-a-day minimum at the campaign level, though that falls to $20 a day if budgets are set at the ad group level instead. Meta ads need roughly $50 a day, or $1,500 a month, to move past the platform's learning phase and start optimising properly. A holiday test under either floor will not produce enough data to act on.
A phased split that matches the shopping calendar
Preparation should start in August, with budget phased across a lead-up, a peak, and a lead-out window instead of spent all at once on Black Friday weekend. One published framework splits a Q4 budget into four stretches. It runs 20 percent for testing from August to October, 30 percent for warming up audiences from November 1 to 26, 30 percent for Black Friday through Cyber Monday conversion, and 20 percent for extended December sales.
Inside peak week itself, the allocation gets more specific still. One Meta pacing model gives Black Friday about 30 percent of the weekend budget at roughly 1.8 times normal CPM, and Cyber Monday 15 percent at 1.6 times normal. The remaining spend covers the bridge days between them, when CPMs ease slightly but conversion rates often stay high.
Across Cyber Week, Meta's seasonal benchmarks show CPMs running 30 to 50 percent above baseline, conversion rates climbing by a similar margin, and cost per acquisition barely moving. A higher cost per impression does not automatically mean a higher cost per sale. That single fact is why pulling budget away from Meta during peak week, purely because the CPM looks worse, often costs more than it saves.
The case for chasing TikTok's cheaper CPMs
The obvious objection to a Meta-heavy split is simple: TikTok costs less per impression, so the marginal dollar should go there. The objection has real weight, and it deserves a direct answer rather than a dismissal. TikTok is worth testing for small businesses, especially for creative testing and awareness, because lower CPMs allow more creative variations for the same spend.
A small business with a limited budget and an immediate need for conversions often sees a better short-term return from Meta. Holiday season rewards exactly that kind of short-term return. Running both platforms well enough to compare them fairly takes roughly $1,500 to $2,000 a month combined; below that, a business should pick one platform, usually Meta, and master it first. Testing TikTok for the first time during Black Friday week means paying discovery costs during the single most expensive week of the year.
The split also depends on who is buying. B2B companies generally do better keeping around 80 percent on Meta and sending the remaining 20 percent to Google rather than TikTok. A gift retailer selling to consumers under 35 has a stronger case for TikTok than a service firm selling to other businesses. The right answer is not universal, and a reader should check which case applies before moving a single dollar.
What changes once you plan the last dollar first
The so-called Q5 period, from December 26 to January 15, offers a real break, with CPMs typically falling 40 to 60 percent as major brands pull spend back after Christmas. Costs drop sharply right after Christmas Day, and holding budget through January reaches shoppers redeeming gift cards, making exchanges, or chasing New Year deals. That makes January, not December 24, the cheapest acquisition window of the whole season.
Scale matters less here than planning does. Meta's own Holiday Playbook reports an average return of over $4 for every $1 spent, and its automated shopping campaigns let a $500 holiday budget run close to enterprise-level efficiency. A small reserve, held back deliberately rather than spent by accident in the BFCM rush, can do real work in that window.
Once a reader accepts this, the marginal dollar stops belonging to whichever platform argued hardest in October. It waits instead for the moment the auction cools, whether that is a bridge day between Black Friday and Cyber Monday or the first week of January. The split is never final until the data from the first phase comes in, and that is exactly why it needs to be planned, not guessed.
