What should a head of growth do in the first 90 days?

The first 90 days as head of growth is not the time to launch campaigns — it's the time to build the foundation that makes every future campaign compoundable. Your job is to audit what already exists, identify the one or two levers most likely to produce exponential returns, and ship at least one measurable win before the quarter closes. Go in without a plan and you'll spend six months optimizing the wrong thing at scale.

Days 1–30: Listen before you touch anything

The most expensive mistake a new growth leader makes is arriving with a playbook from their last company and applying it immediately. Before you run a single test, spend the first month in deep diagnostic mode. Interview every department head — product, sales, customer success, finance — and ask one question each time: 'Where do you think we're leaving the most growth on the table?' The answers will conflict, and that conflict is data.

Pull every metric you can access and build a single source of truth: acquisition by channel, activation rates by cohort, retention curves by segment, and revenue per acquired user over 30, 60, and 90 days. If that data doesn't exist in one place, creating the dashboard is itself a deliverable for month one. You cannot improve what you cannot see, and a fragmented analytics stack is usually the first sign that the team has been running on intuition rather than signal.

Also map the existing growth infrastructure honestly: what tools are in the stack, who owns them, what's actively maintained versus abandoned, and what institutional knowledge lives only in one person's head. This isn't bureaucracy — it's risk management. The goal by day 30 is a written 'state of growth' memo you share with the CEO. That memo forces clarity, creates alignment, and establishes your credibility as someone who understands the business before trying to change it.

Days 31–60: Find the compounding lever, not the quick win

Paul Graham's observation about exponential growth in 'How to Do Great Work' is directly applicable here: the early stages of a compounding curve feel flat, which causes most teams to abandon the right strategy too soon and chase short-term spikes instead. Your job in month two is to identify which growth lever — if invested in consistently — will compound over 12 to 24 months, not just spike this quarter.

The candidates are usually one of four things: an SEO content engine, a product-led viral loop, a referral program embedded in the core workflow, or a sales-assist motion where marketing reduces the cost of each sales conversation. Most companies have tried all four superficially and mastered none. Look at which one has the strongest natural tailwind given your product's structure. A tool people use daily has viral loop potential. A tool people buy once a year does not — it needs SEO and brand.

Once you've identified the primary lever, design a 60-day test that is small enough to execute with existing resources but large enough to produce statistically meaningful signal. Resist the pressure to 'just run some ads' as a show of activity. Paid acquisition is a distribution mechanism for a working funnel, not a substitute for one. If your activation rate is 20%, doubling your ad spend doubles the number of people who don't get value from your product. Fix the funnel before you fill it.

Days 61–90: Ship one measurable win and document the system

By day 60, you should have enough context to identify one high-confidence improvement you can ship and measure before day 90. This might be a redesigned onboarding flow, a new referral incentive, a landing page rewrite targeting a high-intent search term, or a win-back email sequence for churned users. The specific tactic matters less than the discipline: define the success metric before you launch, not after.

The reason the 90-day win matters is organizational, not just commercial. Growth is a function that depends on the cooperation of product, engineering, design, and sometimes sales. None of those teams will prioritize your requests if you haven't demonstrated judgment. Shipping one clean win with a clear before/after metric does more for your internal credibility than a hundred slides about your strategic vision.

Equally important: document what you learned and why it worked. This is how you build a growth system rather than a growth sprint. Every experiment should produce a write-up that includes the hypothesis, the methodology, the result, and the implication for the next test. Over 12 months, this repository becomes the institutional memory of your growth function — and it's what separates a team that improves continuously from one that keeps rediscovering the same insights.

The organizational dynamics no one warns you about

Growth sits at the intersection of product, marketing, and sometimes sales, which means you will spend a significant portion of your first 90 days navigating ambiguity about who owns what. Be explicit with the CEO about your mandate before day one: do you own acquisition only, or the full funnel through retention? Do you have engineering resources or are you dependent on product prioritization? The answers shape your entire strategy.

If you're in a company that has raised a significant round — Paul Graham has written about the pressure investors create around Series A financials and growth targets — you may face pressure to show growth metrics that satisfy investor models rather than metrics that reflect real business health. The head of growth who chases vanity metrics to satisfy a board deck is optimizing for the wrong principal. Your job is to grow sustainable revenue, not to manufacture a growth rate that looks good for 90 days and then collapses.

The clearest sign that your first 90 days went well is not a metric — it's that the rest of the company now thinks of growth as a shared discipline rather than a department. When the product manager considers activation rates during feature design, when the customer success team surfaces churn signals before they become churned customers, and when the CEO asks 'what does growth think?' before making a positioning decision, you've done your job.

“Something that grows exponentially can become so valuable that it's worth making an extraordinary effort to get it started.”

— Paul Graham, source

The one thing to do

Spend the first 30 days diagnosing before touching anything, identify the one compounding lever your business has been underinvesting in, and ship one documented, measurable win before day 90.

Frequently asked questions

Should a new head of growth hire before or after the 90-day audit?

After, not before. Hiring before you understand your actual bottlenecks often means hiring the wrong profile — a performance marketer when you need a data analyst, or vice versa. Let the audit dictate the org structure, not the other way around.

How do you handle pressure to show results before the 90 days are up?

Agree upfront with your CEO on what 'good' looks like at day 30, 60, and 90 — and make sure day 30 is about insights, not revenue. If you don't set expectations before you start, every week without a visible win will create anxiety that pushes you toward shallow tactics.

What if the analytics infrastructure is too broken to run experiments in 90 days?

Then fixing the analytics infrastructure is your 90-day deliverable. You cannot build a growth function on guesswork. A clean measurement foundation that the whole company trusts is more valuable than six campaigns run blind.

How do you prioritize growth channels when everything seems equally untested?

Start from your best existing customers — the ones with the highest retention and lifetime value — and work backward. Ask how they found you, what made them stay, and who else looks like them. That analysis almost always surfaces one or two channels worth investing in before you test anything new.

Sources

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