RGM® Glossary · Kpi Variations
Growth Glossary — Definition
SHT FIRST-ORDER-CA

First-Order CAC

CAC calculated specifically for first-order segment A working definition from the RGM marketing glossary.
Schematic — First-Order CAC

CAC calculated specifically for first-order segment

Term
First-Order CAC
Field
Kpi Variations
Category
Marketing

What it means

One idea, plainly put.First-Order CAC is a marketing concept your team should define once. A loose definition misaligns budgets and reporting.

CAC calculated specifically for first-order segment

First-Order CAC belongs to Marketing and refers to a marketing concept. A shared definition keeps the team aligned.

Where the mechanics matter

Worth a slow read.First-Order CAC produces value through how it is applied. Change the inputs and the right use of it changes too.

First-Order CAC behaves unlike a fixed rule. An early-stage brand and a mature one will apply First-Order CAC on different terms. The mechanics follow the inputs around it. Treat First-Order CAC as a buzzword and the reporting misleads; agree on it and the numbers hold.

The working rule is plain. Agree what First-Order CAC covers first, then act on it. Skip that order and First-Order CAC loses its shared meaning, and two teams end up measuring two different things. Keep this in mind.

The decisions it touches

Read that twice.Reach for First-Order CAC when a real decision rides on it -- a budget, a metric, or a comparison. Otherwise it is reference.

Use First-Order CAC when it changes an outcome. For marketing teams, that tends to be three recurring moments. With no choice live, First-Order CAC is good to know, not to chase.

  1. Setting budget. First-Order CAC clarifies which budget line deserves more.
  2. Choosing a metric. First-Order CAC flags whether the number you report is causal.
  3. Comparing options. First-Order CAC stops a tidy-looking comparison from misleading.

Worked example

Worth a slow read.Below, First-Order CAC is put inside a Oatly setting -- real trade-offs, a clear baseline, and a figure to test it.

Take Oatly. During a packaging-led repositioning, the team made First-Order CAC the deciding input, not an afterthought. They set a baseline first, agreed one definition of First-Order CAC, and only then read the result: US household penetration grew 9 points. The number matters less than the order.

Worked example for First-Order CAC -- illustrative figures, RGM analysis
StageThe step takenWhat it bought
BaselineRead the starting point before any change to First-Order CAC.A fixed point of truth.
DefineFixed one meaning of First-Order CAC for the test.A shared definition up front.
ActA packaging-led repositioning — one variable.Only one thing moved.
ResultUS household penetration grew 9 pointsAn outcome you can trust.

Figures for First-Order CAC here are illustrative and marked RGM analysis. Copy the method, not the exact numbers.

Common mistakes

Start here.Most mistakes with First-Order CAC share a root: the term gets reported as if it were exact when it is not.

Common questions

How is First-Order CAC defined?
CAC calculated specifically for first-order segment In short, fix that meaning before any tactic is debated.
What makes First-Order CAC worth knowing?
First-Order CAC matters because vague vocabulary breaks strategy. A precise, shared definition keeps a team aligned.
How do teams use First-Order CAC?
First-Order CAC informs a decision -- most often a budget, a metric choice, or a comparison. The Oatly example above shows the pattern.
Where do teams slip up on First-Order CAC?
Treating First-Order CAC as one blanket rule and reporting it with no baseline. Both hide a soft assumption.
How is First-Order CAC defined?
CAC calculated specifically for first-order segment In short, fix that meaning before any tactic is debated.
What makes First-Order CAC worth knowing?
First-Order CAC matters because vague vocabulary breaks strategy. A precise, shared definition keeps a team aligned.
How do teams use First-Order CAC?
First-Order CAC informs a decision -- most often a budget, a metric choice, or a comparison. The Oatly example above shows the pattern.