When Increasing Spend Is the Wrong Fix

The default agency response to underperformance is often to recommend more spend. More budget means more reach, more conversions, more data for the algorithm to learn from.

This logic is not wrong in every case. But it is wrong more often than it is applied.

Increasing spend when the underlying account is inefficient does not solve the inefficiency. It scales it.

The Efficiency Threshold

Every account has an efficiency threshold: the point at which additional spend produces diminishing returns. Beyond that threshold, each additional pound buys less.

In a well-structured account, the threshold is high. Budget can scale without proportional efficiency loss. In a poorly structured account, the threshold is low. Spend increases hit diminishing returns quickly.

The question is not "can we spend more?" It is "should we spend more, given how the current spend is performing?"

Where More Spend Goes Wrong

When structure is broken. If budget is flowing toward the wrong products, more budget flows toward more wrong products. The problem scales with the spend.

When signals are dirty. If the algorithm is optimising toward misleading conversion data, more spend means faster learning in the wrong direction. The machine gets better at doing the wrong thing.

When margin is invisible. If ROAS targets do not reflect actual margin, more spend at target ROAS means more revenue at unacceptable margin. Volume increases. Profit does not.

When PMAX is a black box. If you cannot see where PMAX spend is going, more PMAX spend means more opacity. You are funding something you cannot evaluate.

The Agency Incentive

Agencies often benefit from increased spend. Management fees are frequently tied to budget size. More spend means more fee.

This is not necessarily bad faith. But it is an incentive that should be acknowledged. The recommendation to increase spend is not neutral.

Spend governance is about ensuring that spend decisions are made on commercial merit, not on inertia or incentive. It means asking: what would need to be true for this spend increase to be justified?

The Alternative

Before increasing spend, the alternative is reallocation.

Take the current budget and distribute it better. Pause products that are not working. Increase bids on products that are. Restructure campaigns to give budget control at the level that matters.

This is slower than adding budget. It requires more analysis. It produces less dramatic short-term growth. But it builds a foundation that can scale efficiently when the time is right.

When to Actually Increase Spend

Spend increases are justified when:

• The account is structured correctly and marginal efficiency is still strong
• You have clear visibility into where the incremental spend will go
• The conversion data reflects commercial reality, not just platform reporting
• You have tested at lower spend levels and seen consistent performance

Without these conditions, increasing spend is a gamble. Sometimes it works. Often it does not.

The Question to Ask

If performance is flat or declining, the question is not "how much more should we spend?" It is "why is the current spend not working?"

The answer to that question determines whether more spend will help or harm.

This is how we approach how we work with clients. Not starting with budget, but starting with structure and efficiency. Spend follows clarity, not the other way around.