How Much Should You Spend on Google Ads and Meta Ads in 2026?

Why “How Much Should I Spend” Has No Single Answer

Every business owner, CMO, or marketing manager who starts looking for an answer to this question runs into dozens of articles with ranges like “PLN X to Y.” The problem is those ranges vary by industry, margin, sales cycle length, and whether you're building brand awareness or closing already-existing demand. So let's start with the entry threshold: the minimum test budget per channel, below which a campaign struggles to gather enough data to optimize. If you're still sorting out the terms (ROAS, CPA, pricing models), start with what performance marketing is and what it costs.

The Minimum Entry Threshold: PLN 4,000 per Channel — Where That Number Comes From and What Actually Matters

Whether you start with Google Ads or Meta Ads, PLN 4,000 a month per channel is, in our experience, the minimum test budget, and PLN 8,000 in total when you run both at once. Below that threshold, few businesses manage to gather enough data volume to optimize. But an important caveat up front: the amount alone doesn't tell you whether you're crossing the algorithm's learning threshold. What matters is the budget relative to the cost of a single conversion in your industry.

The mechanics are concrete, but differ between platforms. Meta recommends structuring ad sets to reach at least around 50 optimization events over 7 days; falling short slows the learning phase and can raise your cost per result (Meta). For Target CPA, Google recommends evaluating performance over the last 30 days, including at least 30 conversions (Google Ads Help). Each platform has its own threshold.

Whether PLN 4,000 is enough to clear that depends on your cost per conversion. Illustrative example: at a CPA of around PLN 15 (e.g. a lower-priced e-commerce product), PLN 4,000 buys more than 260 conversions a month, above both platforms' thresholds. At a CPA of around PLN 300-400 (e.g. a B2B offer or a premium service), the same budget buys 10-13 conversions a month, well below the threshold, even though the amount is identical. That's why you should treat PLN 4,000 as a practical starting point for testing; it doesn't guarantee exiting the learning phase. You'll run your own test in the section “How to Calculate Your Own Budget in 10 Minutes”, by dividing your budget by the conversion cost in your industry.

Importantly, PLN 4,000 is a per-channel threshold. Two channels at once start at PLN 8,000. If you have PLN 4,000 and split it evenly between Google Ads and Meta Ads, each channel gets PLN 2,000, and at a higher CPA, neither one will gather enough data on its own. With less than PLN 8,000, it's smarter to concentrate the entire budget on one channel to start, gather data, stabilize costs, and only then expand to the second.

Budget by Business Model

Above the PLN 4,000 per-channel threshold, the specific amount that makes sense depends on your business model:

E-commerce. The wider your product catalog and the lower your unit margin, the more budget you need for the algorithm to have enough to choose from. Stores with a narrow catalog and high margin (e.g., beauty, supplements) can operate effectively closer to the lower bound, while broad catalogs (fashion, home and garden) usually need higher budgets to feed enough product data to shopping campaign algorithms.

B2B. Here, sales cycle length and contract value matter more than transaction volume. With a high value per contract, it makes sense to accept a higher cost per lead, but that requires patience: full return-on-investment data only shows up once leads actually turn into signed contracts, which in B2B usually takes longer than one month of campaigning.

Local services. The lowest sensible threshold of the three models, because a geographically limited reach means a smaller auction and less competition for the click. It also means a smaller pool of available customers, so scaling has a natural ceiling.

Why “Bigger Budget, Lower ROAS” Is a Myth

Plenty of guides online suggest a simple relationship: small budget = high ROAS (because the campaign is narrow and precise), big budget = falling ROAS (because you have to reach increasingly less-matched audiences). That's an oversimplification that ignores the most important variable: account architecture quality and consistent optimization determine the result more than budget size does.

A well-designed campaign with a large budget can hold a high return longer than intuition would suggest, provided product segmentation, conversion data quality, and optimization frequency keep pace with spending scale. Conversely: a small budget doesn't guarantee a high ROAS if the campaign is poorly configured. Mistakes simply cost less in absolute numbers, which is easy to mistake for “efficiency.” An example from our work: in the Falcon Car Rental case study, Google Ads ROAS rose from roughly 4.2× to 8.27× after we cut a segment that wasn't converting and moved budget to markets where customers are still planning their trip.

ROAS Isn't Enough — What POAS and Third-Tier Margin Actually Mean

This is the most important part of this article, and the point where most guides stop too early.

ROAS (return on ad spend) only shows the ratio of revenue to ad spend. It says nothing about how much you're actually earning, because it doesn't account for product cost (COGS), returns, order fulfillment costs, or other operating costs. Illustrative example: two campaigns with an identical 4x ROAS can have completely different profitability if one sells a product with a 70% margin and the other with 20%.

That's why the question “what ROAS should I hit at budget X” is the wrong question. Different industries operate on different margins, so the same ROAS means a completely different profit depending on what you're selling. A more reliable metric is POAS (Profit on Ad Spend): return calculated from profit after subtracting product cost and all costs associated with the sale. This requires calculating what's known as third-tier margin: revenue minus COGS, returns, and fulfillment costs. Only that shows whether your ad budget is working for your profit or just generating impressive-looking numbers in the ad dashboard. In the Gabo Wool case study, we managed the Meta Ads budget by CRR (ad cost as a share of revenue) and cut it by 39% year over year.

Google Ads or Meta Ads — How to Split Budget Between Channels

Google Ads and Meta Ads answer a different stage of the buying decision. Google catches a user at the moment they're actively searching for a solution themselves. That demand already exists. Meta shows an offer to people who aren't searching yet, but match the buyer profile. That builds demand from scratch.

For e-commerce with a recognizable brand or existing demand, it makes sense to start with Google Ads (Search + Shopping), because it captures customers who are ready to buy at a relatively predictable cost. For new brands, products that need market education, or D2C models building awareness from zero, Meta Ads often gives a faster start, because it doesn't require existing search volume.

Companies with a budget above the entry threshold in both channels at once usually get the best results by combining them: Meta builds awareness and delivers remarketing data, Google closes sales among people who later actively search for the brand or product category.

Signs Your Budget Is Too Low to Evaluate Anything

Before judging whether a campaign “works,” check whether you even have enough data to evaluate it:

• A Meta campaign is gathering fewer than around 50 conversions a week per ad set, or a Google campaign fewer than around 30 conversions in the last 30 days per campaign. Neither platform's automated bidding strategy has enough to learn from at that point. Whether your budget hits that depends on your conversion cost.
• Acquisition cost (CPA) is still swinging heavily week to week after several weeks of running. That usually means too little data; the strategy itself may be fine.
• Daily budget is regularly fully spent before the end of the day, and the campaign is flagging lost impression share due to budget. You're losing potential conversions before you've even had a chance to judge the campaign's full potential.

How to Calculate Your Own Budget in 10 Minutes

• Set an acceptable customer acquisition cost (CAC) based on LTV and margin, not on “what everyone else pays per click.”
• Check the rough CPC in your industry (Google Keyword Planner for Search, Meta Ads Library for a rough read on social competitiveness).
• Estimate your landing page's conversion rate (if you don't have historical data, use 2–3% for an illustrative calculation; treat it as an assumption for the model).
• Calculate the cost per conversion (CPC ÷ conversion rate), then multiply by the threshold of the platform you're starting on: around 200 conversions a month for Meta (50 a week) or around 30 conversions a month for Google. The result is the budget at which you have a chance of exiting the algorithm's learning phase. Treat the flat PLN 4,000 figure as a practical minimum for testing. If the result comes out above PLN 4,000, plan around the result.

You can do this faster in our ROI Calculator, which works out projected revenue, ROAS, and customer acquisition cost in 6 steps, before you spend a single dollar on media.

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