Planning · 5 min read
How Long Does Marketing Consulting Take?
Marketing consulting duration depends on where you are, what you need, and which format fits your situation. A Strategy Session takes 90 minutes. An ongoing strategic engagement runs from three months. Here is what each format realistically delivers, and what it does not.
Simon Förstemann
Growth Strategist
May 2026
Updated: August 2026
Key Takeaways
- · A Strategy Session takes 90 minutes and delivers diagnosis, prioritisation, and a concrete action plan, but no execution.
- · An ongoing engagement has a three-month notice period and runs 6 to 12 months in practice, working like an Interim CMO. One such mandate delivered +74% revenue growth in 16 months at the same budget.
- · No format, however long, replaces real market fit, a team willing to execute, or leadership ready to decide, consulting sharpens what is already there.
The Real Question Behind the Question
When small business owners and SME leaders ask how long marketing consulting takes, they are really asking: What do I get for my investment? When will I see results? How much of my time does this require? Those are the right questions, and they deserve honest answers rather than vague reassurances.
There is no single answer that fits every situation. The right timeline depends on whether you need a diagnosis or someone who walks the execution with you. That is why there are two formats here, not five. Simon Förstemann, growth strategist with 14 years of experience and 6 ventures built from the ground up, works with two distinct formats, each calibrated to a different starting point.
Format 1: The Strategy Session (90 Minutes)
The Strategy Session is the right format when you need clarity fast: Where do we stand? Where does the path to the sale break down? What is the next lever? In 90 minutes we go through your company, your numbers and your market, and you leave with an action plan.
Why this does not need to be a multi-week project: most growth blockers are visible after an hour of honest analysis. What takes time afterwards is not the diagnosis, it is the execution.
What the session delivers: diagnosis, prioritisation, a concrete next step. What it does not deliver: execution, continuous monitoring, or adaptation as the market shifts.
Format 2: Ongoing Engagement (from 3 Months)
The more intensive format is an ongoing engagement as your Strategic Partner, similar to an Interim CMO on a project basis. Here Simon Förstemann works with companies through a complete growth phase: strategy, execution, regular reviews, adaptation as markets shift, and building internal capability.
The notice period is three months, and in practice these engagements run 6 to 12 months. That is not arbitrary: it is the time marketing needs to travel from a decision to measurable revenue.
This format produces the deepest results, and demands the most trust. As Interim Marketing Manager, Simon Förstemann delivered +74% revenue growth in 16 months at the same marketing budget.
Which Format Fits Which Situation?
- Strategy Session: You have a specific problem, need direction quickly, and are ready to make decisions fast
- Ongoing Engagement: You are facing a significant transformation, repositioning, or growth phase and want a sustained strategic partner, not just a periodic check-in
What Can No Consulting Format Replace?
No marketing consulting engagement, regardless of duration, can substitute for a product that has genuine market fit, a team that is willing to execute, or leadership that is ready to make decisions. Consulting accelerates and sharpens what is already there. It cannot create entrepreneurial substance from scratch.
Simon Förstemann says this directly in initial calls when he sees it. In 7 out of 10 early conversations, the most useful output is a clear-eyed assessment of priorities, not a sold mandate. Sometimes the result of a 30-minute call is: a consulting engagement is not the right next step here; something else is. Honest assessment before contract.
Frequently asked questions
How long does a typical marketing consulting project take?
It depends on the format. A Strategy Session runs 90 minutes and delivers diagnosis, prioritisation and an action plan. An ongoing engagement has a three-month notice period and typically runs 6-12 months, covering the full growth cycle including execution, iteration, and internal capability building.
What is the difference between short-term and long-term marketing consulting?
Short-term consulting (4-8 weeks) focuses on diagnosis, strategy, and fast decisions, you leave with a clear roadmap. Long-term consulting ensures the strategy is executed consistently, adapted to market changes, and that your internal team builds real capability. The deeper the problem, the longer the engagement needed to produce lasting results.
Can I get results from marketing consulting in under 3 months?
A 90-minute Strategy Session delivers strategic clarity and a prioritised action plan immediately. First measurable results usually appear within the first months of implementation. However, meaningful revenue impact typically requires 6+ months of consistent implementation.
When does ongoing marketing consulting make sense?
Ongoing consulting (6-12 months) makes sense when you face a significant growth phase, a repositioning, or a major market entry. It operates similarly to an Interim CMO: strategic leadership, monthly reviews, and continuous adaptation. Simon Förstemann delivered +74% revenue growth in 16 months using this model.
What can no consulting format replace?
No consulting engagement, regardless of length, can substitute for a product with genuine market fit, a team willing to execute, or leadership ready to make decisions. Consulting accelerates and sharpens what is already there. Simon Förstemann says this directly in initial calls when he sees it, because honest assessment comes before taking on a mandate.
Initial Consultation
Find the right format together
In a 30-minute call, Simon Förstemann will assess which consulting format fits your current situation, and what is realistically achievable within which timeframe.
Book an intro call →30 minutes · Informal introduction · Directly with Simon Förstemann
About the author
Simon Förstemann
Simon Förstemann knows what it's like to be in your position: 14 years of experience, 6 ventures founded, 3 exits, Red Dot, German Design Award and German Brand Award 2026. He brings that experience 1:1 into your company, so your marketing sells instead of just keeping everyone busy. He doesn't just advise, he also supports you hands-on with the implementation. No workshops, no apparatus. Your agency and your team stay on board.
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