How to Build an Ecommerce Paid Media Budget

If you manage paid media for an eCommerce brand, budget allocation is probably one of the decisions you revisit most often and feel least certain about. How much to spend. Where to put it. Whether the current split is still the right one.

That uncertainty is reasonable. Ad costs on the platforms most eCommerce brands rely on have risen steadily, and setting budgets based on last year’s benchmarks are going to pay for that lag. New channels emerge regularly, each promising the kind of early-mover returns that compress quickly once the auction fills up. What worked eighteen months ago may be quietly underperforming today, and the reporting that should surface that often doesn’t.

This piece lays out a practical framework for building and maintaining an eCommerce paid media budget grounded in where channel economics actually stand right now.

Key Takeaways

How Much Should You Actually Be Spending?

Before touching channel percentages, the total budget needs to be grounded in something more defensible than last year’s number plus inflation.

Most profitable eCommerce brands invest 10 to 20% of gross revenue in marketing. Early-stage brands in the $500K to $2M revenue range often need to lean higher, reaching toward 18 to 25% to build acquisition momentum. Mature brands at $10M and above can typically pull back to 8 to 12% as existing customers and organic channels carry more weight. Trying to grow aggressively on 5% rarely works, but spending 30% without the economics to support it can burn cash faster than it builds customers.

For context: Gartner’s 2026 CMO Spend Survey puts average marketing budgets at 7.8% of company revenue across all industries. That figure reflects large enterprises across many sectors, many of them in efficiency mode. For eCommerce brands actively growing, it’s a floor, not a target.

The right total budget is anchored to three numbers: the cost to acquire a new customer, the value of that customer over time, and how long the business can sustain the gap between those two figures before it closes. If acquisition costs are rising faster than customer value, more spend won’t solve the problem. If the math is strong and returns are stable, the constraint on growth is usually underinvestment rather than poor channel selection.

The 70/20/10 Framework: What It Is and Where It Came From

The 70/20/10 allocation framework has been a staple of budget planning across industries for decades. At Google, Eric Schmidt and Jonathan Rosenberg formalized the ratio in their book How Google Works: 70% of resources on the core business, 20% on emerging products built on that foundation, and 10% on completely new ideas. Gmail and Google News both emerged from that 10%.

Applied to paid media, the logic translates directly: protect what’s working, invest in what’s promising, and reserve a small pool for what might matter next. The framework endures because it addresses two ways budget allocation tends to go wrong. Teams that put everything into proven channels feel safe in the short run but stagnate because channels saturate, costs rise, and a brand that never tests anything new is always in reaction mode. Teams that spread resources across too many unproven channels never invest enough in any one of them to learn what works. The 70/20/10 split enforces discipline in both directions.

For eCommerce specifically, the three buckets work as follows:

One important caveat: the 70/20/10 split describes how to weight your budget, not a prescription for which specific channels belong where. A channel in the 20% bucket for one brand may be a 70% channel for another, depending on category, audience, and what the data shows.

How Allocation Changes by Revenue Stage

The 70/20/10 framework is a useful structure, but what belongs in each bucket shifts meaningfully as a brand grows. A single allocation applied across every stage produces the wrong answer at most of them.

Early stage ($0 to $2M revenue). Concentrate your budget. Early-stage brands should put the majority of paid spend on one prospecting channel. The goal at this stage is finding buyers, testing creative, and establishing whether costs can reach profitability. Dividing budget across multiple channels at this stage slows learning without meaningfully reducing risk. Meta broad targeting provides the fastest feedback loop for most product categories. TikTok works better for trend-driven products with audiences skewing younger. Pick the channel that maps to your category and customer, and don’t expand until you have at least 60 days of consistent performance at scale.

Scaling stage ($2M to $10M revenue). Diversify deliberately. A practical starting split for most scaling brands: 40% toward Google Shopping, 25% toward Meta, 15% toward Microsoft, 10% toward retargeting, 10% toward testing. The logic here is that Meta or TikTok builds demand, and Google Shopping captures the purchase intent that demand-creation spending produces. The channels reinforce each other when funded in the right ratio. At this stage, email and SMS should also be earning a meaningful budget line because email consistently delivers among the highest returns of any marketing channel and functions as a natural counterweight to rising acquisition costs on paid platforms.

Mature stage ($10M+ revenue). Protect the core and shift more toward retention. Mature brands typically move toward 40 to 50% paid acquisition, 25 to 30% retention investment, 15 to 20% creative production, and 5 to 10% experimentation. At this stage, the economics of keeping an existing customer rarely look worse than acquiring a new one. The paid media budget increasingly serves to protect market position and expand reach deliberately, rather than to build the customer base from scratch.

The Channel Landscape Right Now

Allocation frameworks only work when the underlying channel economics are current. A few things have shifted enough recently to affect what the buckets should include.

According to Triple Whale’s analysis of nearly 35,000 eCommerce brands, Meta CPM rose 20% year over year in 2025, reaching a median of $14.19  and every industry in the dataset saw costs increase. Google Ads costs are moving in the same direction. Triple Whale found that Google Ads median CPA rose 12% year over year in 2025, with CPM up 10% to $12.79.

Costs are rising on the platforms where most eCommerce brands concentrate spend. That doesn’t mean those platforms stop working, but it does mean the 70% bucket needs to be earning its keep more rigorously than it did two years ago.

Go Fish Digital’s own data across 300+ clients reinforces the channel shift already underway. According to our eCommerce media trend analysis, spending has increased across all major platforms over the past four years: Amazon up an average of 36%, Google up 30%, YouTube up 32%, and Meta up 13%. The Amazon growth is notable because as more consumers start product searches directly on the platform, retail media has moved from a line item brands experimented with to one that matters for anyone selling physical goods.

Amazon’s 2025 performance data tells a useful story, too. CPA fell, ROAS improved, and conversion rate strengthened, but amidst those positive signals, CPM surged 47% year over year, the sharpest increase of any metric in Triple Whale’s Amazon benchmarks. More brands competing for the same high-intent audience is pushing costs up even on a platform where efficiency has historically been strong. Understanding where costs are rising fastest, and where returns still justify the price, is the input the allocation framework needs to work properly.

For a broader view of where enterprise budgets are moving across search, retail media, social, and AI discovery, see our analysis: Where Enterprise Retail CMOs Should Move Budget.

The Budget Line Most Brands Get Wrong: Creative

There’s no universally agreed-upon benchmark for how much of a paid media budget should go toward creative production. The figures that circulate (10% is the target, most brands are spending 3%) are practitioner rules of thumb more than documented standards. What the data does support clearly is the underlying logic behind them. Motion’s 2026 eCommerce benchmarks found that creative accounts for 70% of campaign performance variance on Meta—more than audience targeting, bidding, or budget allocation combined. If creative is doing that much of the work, funding it like a line item rather than a production cost is the more defensible approach.

The production gap reinforces the point. The median eCommerce brand produces 8 new ad creatives per week. Top-quartile performers produce 22 or more, using batch production, modular creative systems, and AI-assisted variation to keep volume high without proportionally increasing cost. That difference in output is partly a creative strategy question, but it’s also a budget one, and brands that treat creative production as an afterthought to the media plan tend to find out the hard way when fatigue sets in and performance drops without an obvious explanation.

This matters because creative is the primary lever in paid social. Think of it this way: the media budget rents attention, but the creative is what does something with it. On platforms like Meta and TikTok, the algorithm routes spend toward ads that earn engagement and drive action. Better creative is a cost efficiency improvement because stronger ads generate more return per dollar of media spend. Underfunding creative means renting attention you’re not making the most of.

Meta now favors accounts running 15 or more active creatives for optimal ad delivery, a threshold that requires a production system, not occasional campaign assets. An eCommerce brand running the right channel allocation with underfunded creative is leaving performance on the table at every stage of the purchase process.

At Go Fish, we treat performance creative as a core component of paid media strategy. We have a production system built to generate, test, and iterate on creative at the volume and pace the platforms require. See more of how that works in practice: TikTok Ads Strategy for Performance Marketing: A Creative-First Playbook and How to Test and Scale Paid Social Ad Creative.

When to Reallocate and How Often

The most common budget failure in eCommerce paid media is failing to adjust when channel economics change. The right reallocation cadence is quarterly review. Daily reactive shifts erode the data needed to understand what’s working. Annual reviews are too infrequent as channel costs move month to month. A useful rule of thumb: if any single channel’s cost to acquire a customer moves 25% or more in either direction over a 30-day window, that’s worth investigating as a potential structural shift rather than a blip, and may warrant an off-cycle reallocation decision.

Seasonality is the other reallocation driver that gets underweighted. Ecommerce brands with significant fourth-quarter concentration need a budget calendar that front-loads creative testing earlier in the year so campaigns entering the holiday period are already optimized rather than still learning. Q4 typically represents 42% of annual eCommerce revenue and CPMs during that period run 35 to 45% higher than annual baseline. Waiting until October to ramp holiday spend means paying peak prices for data you could have collected at lower cost in July.

The 70/20/10 framework was not designed to remain static all year. Today’s 20% growth bet may earn a spot in the 70% core. Last quarter’s core channel may be showing signs of diminishing return and need a reduction. No allocation framework should hold rigid across a full year of shifting channel economics.

A Starting Framework by Budget Size

For brands formalizing paid media allocation for the first time, a simplified starting point by monthly budget:

Under $10K/month: Concentrate 100% in one or two channels, typically Google Shopping and one paid social platform, until you have 60 or more days of consistent performance data. Don’t divide budget before you have enough in any single channel to act on what you’re learning.

$10K to $30K/month: Apply a rough 70/20/10. Seventy percent to your proven acquisition channel or channels, 20% to a secondary channel showing early results, 10% to creative testing or a new platform. Reserve at least 10 to 15% of total budget for creative production separate from media spend.

$30K to $100K/month: Full 70/20/10 across a multi-channel mix: Google Shopping, Meta, email and SMS retention, one or two growth channels (TikTok, retail media, YouTube). Creative budget should scale with media spend. Quarterly reallocation reviews become essential at this level, and a measurement infrastructure including attribution modeling, channel-level reporting  is worth investing in.

$100K+/month: The framework holds but the analysis becomes more sophisticated. Understanding what’s actually driving performance versus what’s capturing credit requires more rigorous measurement: incrementality testing and media mix modeling both become more relevant at this level. This is where guessing is most expensive and data quality matters most.

Not sure whether your current paid media allocation matches your stage and goals? Go Fish Digital’s paid media team audits eCommerce accounts across search, social, and social commerce and builds the budget framework from there. Request a paid media audit.

Frequently Asked Questions

What percentage of revenue should an eCommerce brand spend on paid media? Most eCommerce brands in active growth invest 10 to 20% of gross revenue on total marketing, with paid media representing the largest portion of that. Early-stage brands often need to be toward the higher end of that range to build momentum. Mature brands with strong organic and retention channels can operate toward the lower end. The right number depends on your margins, your cost to acquire customers, and what that customer is worth over time — not on what the industry average says.

What is the 70/20/10 rule in paid media? It’s a budget allocation framework that divides spend into three buckets: 70% toward channels with a documented track record of positive returns, 20% toward channels showing early promise that haven’t yet been fully optimized, and 10% toward experiments with new platforms or formats. The framework was popularized by Google and has been widely adopted in marketing because it balances protecting what works with creating space to find what might work next. The percentages are a starting point, not a fixed rule. What belongs in each bucket should reflect actual performance data.

How often should I review my paid media budget allocation? Quarterly. Annual reviews are too slow given how quickly channel costs move. Daily changes erode the data needed to understand performance. Reviewing every quarter gives enough time for changes to register in the data while still allowing meaningful course corrections across the year.

What channels should be in the 70% “proven” bucket for eCommerce brands? For most eCommerce brands at scale, the 70% bucket typically includes Google Shopping or Performance Max (for capturing existing purchase intent), Meta (for prospecting and retargeting), and email and SMS (for keeping existing customers engaged). The exact mix depends on your category, audience, and what your own data shows is working. A channel belongs in the 70% bucket when it has delivered consistent positive returns for at least two consecutive quarters with enough volume to draw reliable conclusions.

How much should I budget for creative production? At minimum, 10% of total paid media spend. Most brands allocate far less than that and pay for it in weaker ad performance. Creative production should be treated as a media efficiency investment: better assets drive better returns from the same media spend, because platforms like Meta and TikTok distribute ads based partly on how well they perform, which means creative quality directly affects cost.

When should I start testing new channels? Once your primary channel has delivered consistent, profitable returns for at least 60 days and your total monthly budget exceeds roughly $10,000. Below that threshold, dividing budget across multiple channels typically produces insufficient data in any of them to make informed decisions. When you do expand, fund the new channel meaningfully because a token allocation generates token data.

Is it worth advertising on TikTok Shop? For the right product and category, yes. TikTok’s median CPM in 2025 was $13.26, which is still below Meta’s $14.19, and the platform’s in-feed shopping format compresses the path from discovery to purchase in ways traditional eCommerce cannot match. Products that demonstrate their value visually, solve a specific problem, and land in the $20 to $60 price range tend to perform best. See how Go Fish clients have approached this: How Brands Are Driving Revenue with TikTok Shop.

How do I know when my channel allocation is working? The right metrics depend on your stage, but the most reliable indicator is whether the cost to acquire a new customer is stable or improving relative to what that customer is worth over time. Platform-level metrics like return on ad spend and click-through rate are useful for diagnosing specific campaigns, but they don’t tell the full business story. If acquisition costs are rising and customer value isn’t keeping pace, the allocation may be working at the campaign level and failing at the business level.

Are you putting your paid media budget in the right places?

We can help you evaluate your current channel mix, identify where spend may be underperforming, and determine where there’s room to reallocate or scale.