How to allocate ad budget across Google, Meta and LinkedIn
There's no universal formula for budget allocation, but there is clear logic. Here's how to decide how much to put on each channel based on your business model.
Why Wrong Allocation Costs More Than the Budget Itself
We took over an eCommerce account with 80% of budget on LinkedIn, right for B2B, completely wrong for an online store. Result, a cost per lead three times the price of the product being sold. The problem wasn't the budget. It was the distribution.
Before deciding how much goes on each channel, you need to understand what each one actually solves.
The Core Logic, Capturing vs. Creating Demand
Google Ads captures existing demand. It works when people already search for what you sell. If search volume doesn't exist for your product, Google Ads won't work regardless of budget.
Check this before you split the budget, not after. The trap is finding volume on adjacent terms that belong to a different buyer: the consumer version of your product, searched by individuals, while you sell the industrial one. The volume exists, the buyer does not. Look at who is behind the search, not just the number.
Meta Ads creates demand. It reaches people who don't know they need your product yet. It works well for visual, impulse, and lifestyle products - things you discover rather than search for.
LinkedIn Ads targets by role and industry. It makes sense exclusively for B2B with decisions made by professionals. Cost per click runs several times above Google or Meta and is only justified if a customer is worth an order of magnitude more than on the other channels.
Recommended Allocation by Business Type
eCommerce (fashion, beauty, home&deco)
- Meta Ads, 50-60% (discovery, retargeting)
- Google Ads, 30-40% (Shopping, branded Search, retargeting)
- LinkedIn, 0%
Local services (clinics, plumbers, lawyers, real estate)
- Google Ads, 70-80% (local Search, LSA)
- Meta Ads, 20-30% (local awareness, remarketing)
- LinkedIn, 0% (exception, recruitment or HR firms)
B2B SaaS or professional services
- Google Ads, 40-50% (direct search intent)
- LinkedIn Ads, 30-40% (decision-maker targeting)
- Meta Ads, 10-20% (retargeting, awareness)
The 70/20/10 Rule
Regardless of business type, a useful framework:
- 70% on the primary channel with proven ROAS or CPL
- 20% on the secondary channel with confirmed potential
- 10% on tests, new channel, new format, new audience
Don't split budget equally to "diversify." Concentration beats premature diversification.
Minimum Budget Per Channel to Matter
There is no universal threshold, because it depends on the cost per click in your category. The logic is constant though: below a certain volume the algorithm never gathers enough conversions to calibrate, and the campaign stays in learning. As an order of magnitude, in a category with average cost per click:
- Google Ads Search. below a certain volume of conversions you rarely exit the learning phase, and you find the threshold by multiplying the 30-50 monthly conversions the algorithm needs by your own cost per conversion
- Meta Ads. per active ad set you need roughly 50 optimisation events per week, so the threshold is 50 multiplied by your own cost per conversion
- LinkedIn Ads. the highest threshold of the three, because a click costs several times more, and a conversion more still
Work out the threshold for your own category rather than reading it off a list. In a niche where a click costs several times the market average, the same budget buys you a fraction of the data you need.
If your total budget does not reach the threshold for more than one channel, be present on that one with sufficient budget rather than three with insufficient ones.
How to Adjust Allocation Over Time
Initial allocation is a hypothesis, not a permanent rule. Every 30 days, compare cost per conversion by channel. Move budget from high CPL/CPA channels toward low CPL/CPA channels. Sudden budget increases (over 20% per week) can reset the learning phase - adjust gradually.
Why Multi-Channel Attribution Is Hard to Solve in Practice
When running Google, Meta, and LinkedIn simultaneously, each platform claims the conversion. Meta reports it contributed to the sale. Google reports the same. The aggregate CPA across all platforms will be higher than the business's real CPA. And each platform will show you data that justifies its own budget.
The only way to see the real picture is to track sales in a CRM or GA4, not in platform reports. But that means having tracking correctly configured, understanding attribution models, and comparing data from different sources that don't speak the same language. Correctly allocating budget across channels is an ongoing analysis exercise, not a one-time decision that stays valid.
Frequently asked questions
What percentage of revenue should I allocate to advertising?
General rule, 5-15% of revenue for mature businesses, 15-25% for growing businesses wanting to gain market share quickly. But the right percentage depends on your gross margin and sustainable CPA, not a universal rule. Calculate the maximum acceptable CPA and multiply by the desired number of acquisitions.
How do I split the budget between Google Ads and Meta Ads?
If you're starting out, focus 80% on one channel and 20% on testing. Once one channel works, add the second. Practical rule for mature eCommerce, 50-60% Google (Search + PMax), 30-40% Meta (prospecting + remarketing), 10% reserve for testing. B2B, 40-50% Google, 30-40% LinkedIn, 10-20% Meta.
Should I increase budget if campaigns aren't performing?
No. Increasing budget doesn't fix problems with structure, targeting, or landing page. More budget amplifies both good performance and problems. If campaigns aren't performing, diagnose first, is tracking correct? Is the audience relevant? Does the landing page convert? Fix the problem before scaling the budget.
How quickly can I scale an advertising budget that's working?
The common-sense rule, increase budget by maximum 20-30% per week. A sudden increase, several times over overnight, resets algorithm learning phases and can temporarily deteriorate performance. Gradual scaling allows the algorithm to adapt and maintains stable CPA.
What do I do with leftover budget at the end of the month?
Don't 'dump' remaining budget into inefficient campaigns just because budget is available. If current campaigns have met their objectives, remaining budget can be redirected to, testing a new channel, remarketing to warm audiences, or boosting best-performing campaigns. Unused budget isn't a problem if business objectives were met.
At DAFE Digital we allocate and rebalance your advertising budget between Google, Meta and LinkedIn. Each channel gets what it deserves, based on real data.
Advertising budget allocation across channels is a strategic decision that changes with every season and objective. We monitor cross-channel performance and move budget toward what produces the lowest cost per customer.
Adela Mincea
Fondatoare și strateg în marketing de performanță · DAFE Digital · Formator ANC
Adela is a founder and performance marketing strategist with 10+ years of paid media across Europe, the US and Asia. She founded DAFE Digital in 2023 after agency roles in London and Hong Kong, in-house work inside client organisations, and independent consulting across 27+ industries.
