How to make the case for more paid search budget
Most marketing professionals find budget conversations with finance directors and business owners frustrating. Here is how to approach them in a way that actually works.
The mistake most marketers make when asking for more budget is starting with marketing metrics. CPCs, CTRs, and Quality Scores mean nothing to a finance director. What they care about is revenue, margin, and return on investment. Start there and work backwards to the marketing inputs.
Build the investment case from revenue
Show what the current campaigns are delivering in revenue terms. Not just conversions - revenue. If each lead is worth £400 in expected revenue, and you generated 50 leads last month from Google Ads, that is £20,000 in revenue pipeline from £3,000 in ad spend. A 6.7x return. Present it that way. Then show what happens if you increase spend to £5,000: based on current efficiency, another 30 leads, another £12,000 in pipeline. The decision-maker sees a commercial case, not a marketing request.
Show the marginal return
The most compelling argument for more budget is marginal ROI. If your current campaigns are delivering at £50 CPA and the next £1,000 of spend will deliver at £60 CPA (slightly less efficient due to scale), and each conversion is worth £300 in gross margin, the next £1,000 still delivers £200 in net margin per conversion. Even at reduced efficiency, the investment creates value. Make this calculation explicit.
What competitive data can add
If you have impression share data showing that you are losing 40% of eligible impressions due to budget, you can show directly that there is demand you are not capturing. Every impression you lose to budget is an opportunity you are handing to a competitor. Quantify how many additional conversions the lost impressions represent based on your current conversion rate. That is the cost of the budget constraint expressed in commercial terms.
Address the risk
Decision-makers who push back on budget increases usually do so because they are worried about downside risk. Address this directly. Propose a time-limited test - an additional £X per month for 60 days with clear success criteria. If the additional spend delivers at an agreed return, you continue. If it does not, you revert. This limits the perceived risk and creates a clear decision point rather than an ongoing commitment.
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