Google vs Meta: How I Split a $10M Budget vs How I'd Split $10K
The short answer: at $10K a month, I put 70% into Meta and 30% into Google. At $10M a year, that ratio flips closer to 55% Google, 45% Meta. The reason isn't complicated. Small budgets need discovery and volume. Big budgets need to harvest demand that already exists. Let me show you the math on both.
Meta Ads vs Google Ads for Ecommerce Budget Split: The Core Logic
Google ads capture demand. People type "best running shoes for flat feet" because they already want to buy. Meta ads create demand. Nobody wakes up thinking about your product until they see it in their feed.
Budget splits should follow one question: does this business have enough existing search demand to spend against? If yes, Google gets more. If the category is new or the brand is unknown, Meta needs to do the heavy lifting first.
I scaled a DTC brand from $100K to $3M in revenue. In month one, we had almost zero branded search volume. Nobody was googling the brand name. Meta had to introduce the product to the world. We put $7,000 of a $10,000 monthly budget into Meta prospecting and retargeting, and $3,000 into Google, mostly non-brand category terms and a thin layer of brand defense.
How I'd Split $10,000 a Month Today
For a brand doing under $500K a year in revenue, here's the split I'd run:
- $5,500 to Meta prospecting (cold audiences, broad targeting, 3-5 creative concepts rotating weekly)
- $1,500 to Meta retargeting (cart abandoners, video viewers, past purchasers)
- $2,000 to Google non-brand search (category and competitor terms with clear purchase intent)
- $1,000 to Google Shopping (product listing ads, which convert cheap once feed is clean)
At this budget size, you don't have enough data to run a serious Performance Max campaign or a full-funnel YouTube play. Keep it simple. Feed Meta enough spend that the algorithm can exit the learning phase, which Meta itself says needs roughly 50 conversions per ad set per week. Below that, you're paying a volatility tax.
How I Split a $10M Budget
Bigger budgets change the math because branded search volume grows with the business. When people already know you, Google becomes cheaper and more efficient per dollar than Meta.
On a $10M annual ecommerce budget, here's roughly how I'd allocate it:
- $3.5M to Google, split across Shopping, Performance Max, and branded search (branded search alone might only need $200K to $400K, since CPCs on your own name are cheap, but it's non-negotiable insurance against competitors bidding on you)
- $4M to Meta, mostly prospecting with new creative testing weekly, because at scale creative fatigue becomes your biggest cost driver, not targeting
- $1.5M to a mix of YouTube, TikTok, and Amazon ads, treated as expansion channels once Meta and Google are optimized
- $1M held as a flex reserve for Q4 and seasonal spikes, since CPMs on Meta can jump 40-60% in November and December
This isn't from theory. I managed $10M on a $2.2B infrastructure project, and the lesson carries over even though the product was completely different: big budgets need reserves and phased release, not one flat monthly number. Ecommerce is the same. You don't spend evenly across 12 months when a third of your revenue happens in 8 weeks.
The Formula I Use to Check Any Split
Before I finalize any budget, I run this quick gut check:
Branded search volume ÷ total search volume in your category = your Google ceiling.
If branded search is 5% of total category search volume, Google can't do much more than capture that plus some category terms. The rest of your growth has to come from demand creation, which is Meta's job. If branded search is 30% or more of total volume, you've built enough awareness that Google can carry a heavier load efficiently.
Run this quarterly. As Meta spend builds brand awareness, branded search volume climbs, and your Google budget should climb with it. I've watched this play out directly: at the DTC brand, branded search grew from under 500 monthly searches to over 12,000 within 18 months, entirely as a downstream effect of Meta spend. We shifted another 10 points of budget from Meta to Google as that happened.
The Most Common Mistake
The mistake I see most often is founders treating Google and Meta as competing channels instead of sequential ones. They ask "which one converts better" and then dump everything into whichever platform wins that argument in a single attribution report.
That's backwards. Google's last-click data will almost always look better because it's capturing demand Meta already created. Cutting Meta because Google's ROAS looks stronger is like firing your sales team because your invoicing software shows a great close rate. Kill the top of funnel and the bottom dries up six weeks later.
Watch branded search volume as your real signal. If it's flat or declining while you're spending on Meta, that's the actual problem, not the ROAS number in your Google dashboard.
The Practical Takeaway
Don't copy my exact percentages. Copy the method. Figure out what share of your category's demand already exists in search. That tells you your Google ceiling. Everything above that ceiling has to come from Meta, or another platform that creates demand instead of just capturing it.
Start heavier on Meta when the budget is small and the brand is unknown. Shift toward Google as branded search volume grows. Recheck that ratio every quarter, not once a year. Budgets that don't move with the business are the fastest way to waste money on both platforms at once.