Running a Pre-Mortem on a Marketing Campaign Before You Spend the Budget

28 September 2026·5 min read

Quick answer: A pre-mortem is a 30-45 minute workshop you run before you spend the budget. The team imagines the campaign's already failed, writes down why, then groups those reasons into risks you can check or mitigate before launch — instead of a "lessons learned" doc nobody reads once the money's gone. It's the cheapest insurance a campaign budget will ever buy. 🚀

Every business does the post-mortem: the awkward meeting after a campaign underperforms, reverse-engineering reasons that were predictable weeks earlier. Almost nobody does the version that helps — sitting down before a dollar is spent and asking "if this fails, why?" A pre-mortem isn't pessimism, it's moving the honest conversation to when you can still act on it. 💖

What most businesses get wrong about campaign planning

Planning is all upside — the brief covers target, creative and timeline, but never "what could stop this working."
The one skeptic stays quiet — someone has a nagging doubt about the audience or timing, with no structured moment to raise it without sounding negative.
Reviews happen too late — a debrief after spend is a post-mortem. By then you're documenting a mistake, not preventing one.
"We've done this before" is treated as proof — the audience, channel and economy have moved since last time; similar isn't guaranteed.
Nobody owns the risks that get named — mentioned once in a meeting, never written down or checked, and it happens anyway.

The pre-mortem workshop template

Run this with whoever briefs, approves and executes the campaign — 30 to 45 minutes, at least a week before spend commits.

STEP 1 — State it: "We're running [campaign] with a budget of $[amount], from [start] to [end], to achieve [specific target]."

STEP 2 — Declare the failure: Read aloud: "It's [end date]. The campaign is over. It missed [target] by [an uncomfortable gap — e.g. 40%]. Everyone here already knows why."

STEP 3 — Silent writing (5 min): Everyone writes their own answer to "Why did it fail?" No discussion yet — this stops the loudest voice setting the agenda.

STEP 4 — Cluster: Read every reason aloud, sort into: Message risk, Audience risk, Budget & pacing risk, Execution risk, External risk.

STEP 5 — Pick the top risks: Per cluster, agree the one or two that are genuinely likely.

STEP 6 — Trigger and fix: "If we see [warning sign] by [check-in date], we will [specific action] instead of waiting to see how it plays out."

That last line is the point — a pre-mortem without a trigger and an owner is just a well-formatted worry session.

Scenario: launching a new product or service: Answers cluster around Audience risk ("we're assuming customers want this — we haven't asked") and Execution risk ("the landing page sells features, not the problem it solves"). Fix: "if waitlist sign-ups are under 50 by the date we open ads, we pause spend and test the headline against the real objection first."

Scenario: increasing ad spend on a channel that's working: The risk nobody says aloud until now: "it works at $50/day because we're only reaching the cheapest audience — at $200/day we'll run out of them and cost per lead will climb." Fix: "if cost per lead rises more than 25% in two weeks, we hold the increase and test a second audience" — agreed before approval, not discovered three weeks into an invoice.

Scenario: rebranding the business: The uncomfortable answer: "long-time customers won't recognise us, assume we've closed, and go looking for a competitor instead." Fix: "if repeat-customer enquiries drop in the four weeks after launch, we message the existing list directly — 'still us, new look' — rather than wait for it to recover on its own."

How to actually run the session so it works

Invite whoever holds the budget, whoever briefs the creative, and someone who deals with customers directly — they hear objections a strategy deck never mentions. Start with silent writing before any discussion; open with "so, thoughts?" and the most confident voice anchors everyone else, drowning out the quiet doubts that are usually the most accurate. Park "how do we fix this" until every risk is named — solving problem one distracts the room from ever hearing problem four. And timebox it early: run it the morning the ads go live and there's no time left to act on anything it surfaces.

💡 Run it a week before, not the day before. The entire value of a pre-mortem is having enough runway to actually change the brief, the audience or the budget split. Done the morning of launch, it just becomes a well-documented reason things went wrong.

Mistakes that make a pre-mortem pointless

Turning it into a blame session — re-litigate the last campaign and people stop being honest about the next one.
Naming risks and filing them away — a risk without an owner and a date is a sentence, not a plan.
Skipping it for "small" campaigns — small budgets often have the least room to recover from a wasted week.
Only inviting people who'll agree — a room full of fans of the plan produces low-value risks.
Treating it as a one-off ritual — the fixes only count if someone checks the trigger dates once live.

Frequently asked questions

Isn't this just a risk register or contingency plan?

It's related, but not the same — and this is the bit people skip. A contingency plan assumes you already know the risk and just need a backup step. A pre-mortem's job is surfacing risks nobody had planned for, because imagining the campaign has already failed pulls out doubts that ordinary "what could go wrong?" brainstorming misses. Do the pre-mortem first; it should feed the contingency plan, not replace it.

Do I need this for every campaign, even small ones?

Not every one — a $300 boosted post for a week doesn't need a formal workshop. Do it for anything with a fixed budget you can't claw back, a launch you only get once, or a change that's hard to reverse if it goes wrong.

What if we run it and nothing changes?

Still worth doing. Sometimes you decide to accept a risk rather than mitigate it — a fine outcome, as long as it's a decision you made on purpose rather than a surprise you're reacting to later. The value isn't that it always changes the plan; it's that nothing about how the campaign performs should genuinely surprise the room. 📈

Keep reading 🤍

Written by

Kate, founder of Chronically Online

I help Gold Coast and Brisbane businesses grow with branding, websites and marketing that actually works.

Work with me ✦