How much should we spend on marketing?

There is no fraction to copy that answers this honestly. The number falls out of three constraints reasoned in order: how long the company can wait for spend to return, how much the team can actually execute, and what the committed motions cost to fund at a credible level. Those constraints differ enough between companies that a borrowed figure usually misleads.

What percent of revenue should go to marketing?

That question imports an average of companies whose margins, motions, and maturity you don't share, and it scales spend with last period's revenue rather than with what you intend to cause next. Deriving the budget from payback tolerance, capacity, and committed motions tends to produce a number someone in the room can actually defend.

How do I defend a marketing budget to finance?

Walk the derivation rather than citing a norm: the payback exposure the company can carry, the motions committed to and their honest funding levels, and each bet's thesis with its review date. This also reframes cuts — a reduction cancels a named bet and the evidence it would have produced, which is a consequence finance can weigh.

Is it better to fund many channels a little or a few channels fully?

Fewer, fully — as a strong tendency. Each motion has a minimum credible cost below which it produces neither results nor evidence, so spreading budget thinly risks paying for a set of experiments that can't even fail informatively. If the committed motions exceed the ceiling, cutting one entirely usually beats shaving all of them.

How to set a marketing budget from first principles

Guide · Frameworks · 5 min read · last verified 2026-07-27

Reviewed before publication Editorial board Independent commercial review

In shortSkip the percent-of-revenue rule entirely: derive the budget from payback you can wait for, team capacity, and fully funded committed motions — then hold it as a portfolio of bets with scheduled review dates you can defend step by step.

A marketing budget set from first principles is a number derived from what the company intends to cause — the payback it can afford to wait for, the motions it has committed to, the team that will actually spend the money — rather than a number copied from what other companies report spending. The distinction matters because the most common budgeting method in B2B is imitation presented as arithmetic: take revenue, apply a fraction someone published, and defend the result on the grounds that it matches the crowd. This piece works through the alternative. It contains no benchmark fractions and no example amounts, deliberately, because any specific figure would be doing exactly the borrowed-authority work the method is meant to replace.

Why the percent-of-revenue shortcut fails

The percent-of-revenue rule has three structural problems, and none of them depends on which fraction gets used. It is an average of strangers: the companies behind any published figure differ from yours in margin structure, motion mix, market maturity, and ambition, and borrowing their average imports their situations without their context. It points backwards: it scales spend with what already happened — last period's revenue — rather than with what you are trying to make happen next. And it persists for a reason that should worry you: it is defensible rather than derived. Matching a published norm rarely gets challenged, which means the number arrives pre-excused, and a number that needs no reasoning to defend is a number nobody in the room actually owns. The rule answers the question of what other people spend. The budgeting question is what this company, in this position, should cause.

Start from payback

The first principle is temporal. Marketing spend is money the company parts with now in exchange for pipeline later, and the true ceiling on the budget is set by how long the company can wait for the exchange to complete. Different motions return on very different clocks: presence and coverage work builds over quarters and compounds; outbound and paid motions return faster and stop when you stop. The board's patience and the company's runway — not any survey — determine how much can responsibly be in flight at once, meaning committed but not yet returned. Framing it this way converts an abstract argument about size into a concrete argument about waiting: how much exposure to the slow-but-compounding clock can we carry, and how much needs to sit on the fast clock. That conversation has a right answer for your company. The published fraction does not.

Then from team capacity

Money the team can't execute is not budget; it is queue. Every motion consumes hands and judgment — briefs written, campaigns shaped, vendors managed, results read — and a budget that outruns the people available converts itself into rushed agency engagements and half-launched projects, which is spending shaped by the need to spend. In small teams the capacity constraint tends to bind before the ambition constraint does, and noticing this changes the conversation usefully: if capacity is the binding constraint, the budget discussion is really a hiring discussion, and sometimes a leadership one — the question of when a fractional CMO makes sense often surfaces exactly here. Sizing the budget to the team you have, while budgeting separately for the team you need, keeps both honest.

Then from committed motions

A motion is a sustained way of reaching buyers — a presence motion, an outbound motion, an events motion — and each one has a minimum credible cost: the level of funding below which running it produces neither results nor evidence. Underfunding is the most expensive option available, because you pay something and learn nothing; the motion fails for reasons indistinguishable from underinvestment, so it can't even be ruled out. From first principles, then, the budget is the sum of fully funded committed motions, bounded above by the payback ceiling and by capacity — not a pool of money allocated across wishes after the fact. If the sum exceeds the ceiling, cut a motion entirely rather than shaving all of them. Working out the right funding level inside a single motion is its own exercise — budgeting for AEO does this for one channel — and this piece deliberately stays one level above it.

Hold it as a portfolio of bets with review dates

Each line in a first-principles budget is a bet, and a bet has three parts: a thesis stating what the spend should cause and by what mechanism, a review date, and the question that will be asked on that date. The review question is not a target — target-setting is its own discipline with its own failure modes, covered in how to set growth targets without fake precision — it is narrower: is the mechanism showing signs of working. Scheduling the question in advance is what lets kill and scale decisions happen calmly on the calendar instead of violently in the annual planning panic. The portfolio frame also legitimizes carrying lines at different risk levels — proven motions alongside an experiment or two — because a portfolio is supposed to contain both. For bets on market presence, the review works best against a locked benchmark of buyer questions, the discipline Magrios instruments, so the review date arrives with a difference to examine rather than a debate to relitigate.

Defending the number

A budget derived this way defends itself differently, because the defense is the derivation. Instead of pointing at a norm, you walk the reasoning: this is the payback exposure we can carry, these are the motions we committed to and what funding them properly requires, here is each bet's thesis and its review date. Finance can disagree with a step, and that disagreement is productive in a way that haggling over a copied fraction never is. It also changes what a cut means: a portfolio budget lets you respond to a proposed reduction by naming the specific bet being cancelled and the specific evidence that will now never arrive, which is a consequence, not a protest. The ongoing relationship with finance deserves its own treatment — how to report marketing to a CFO covers it — but the budget defense is that relationship's opening move, and it goes best when the number was reasoned into existence rather than found.