Fractional Head of Growth Responsibilities

Fractional head of growth responsibilities cover the whole growth function, part-time: owning one weekly number, choosing the channel mix and budget, running the website and content, managing agencies and contractors, building the reporting and leading launches. The fractional part is the number of days a week, not the scope or the accountability. If someone only runs one channel, they're a specialist, not a head of growth.

I do this work part-time for startups and held the full-time role twice, at Pieces for Developers and Quadratic. This is the job as I do it, so weigh it with that in mind.

What is a fractional head of growth?

A fractional head of growth is a senior growth leader who works for your company part-time, usually one to three days a week, and owns acquisition, conversion and the numbers behind them. The fractional head of growth meaning is in the title: the same job as a full-time head of growth, on fewer days.

You'll also see the role called a fractional chief growth officer, a fractional growth executive or simply fractional growth. The titles change with company size. The work is the same.

It's different from a fractional growth consultant, who advises on a defined question and steps away, and from a fractional growth marketer, who executes in one or two channels. A head of growth owns the outcome.

Fractional head of growth responsibilities

Here's the scope I take on, and what I'd expect from anyone you hire for this role:

1. The number. One weekly metric, usually signups, activations or pipeline, that the head of growth reports on every week and answers for.
2. Channel mix and budget. SEO and GEO, paid search, paid social and video, creators and launches: which ones get money, in what order, and when to change course.
3. The website and content. Keyword architecture, landing pages, the content engine and the conversion path. The site is the product's first demo.
4. Agencies and contractors. Briefing, managing, measuring and replacing them when needed, and keeping the ones that work.
5. Reporting. One view across product data, analytics, the CRM and ad spend, with the same numbers going to the founders and the board.
6. Launches. Product releases, Product Hunt and the response when a competitor stumbles.
7. Hiring. Defining the first growth roles and, eventually, helping hire the full-time leader.

The thread through all of it is accountability. A head of growth answers for the number, so they have to control the levers that move it.

How it differs from a fractional CMO

The roles overlap, and at many startups the title is a matter of taste. The difference is emphasis. A fractional CMO usually owns brand, positioning and communications along with demand, and often manages a larger team. A head of growth leans harder into acquisition, conversion and measurement, and does more of the execution personally.

For a product-led or self-serve software company, the growth emphasis usually fits better. The number that matters is signups and activation, and the work is mostly search, paid, content, creators and the path from visitor to active user.

What a week looks like

The role isn't a status call every other Thursday. In practice, a week looks like this:

1. A weekly growth review against the number, with the founders or leadership team.
2. Time in your Slack, your analytics and your ad accounts most days, not just on scheduled days.
3. Hands-on work: setting up tracking, restructuring campaigns, writing pages, pulling reports.
4. Agency and contractor check-ins against agreed metrics.
5. A written plan each month, updated with what the data said.

The first 90 days

The first three months follow the same pattern a full-time hire would:

1. Days 1 to 30: diagnose. Audit the funnel, the accounts, the site and the tracking. Fix the tracking, because it's almost always wrong, ship the quick wins, and write up where the biggest gains are.
2. Days 31 to 60: build. Write a plan with numbers on it, restructure paid around conversion value, map the keyword architecture, and stand up the reporting.
3. Days 61 to 90: compound. Reallocate budget based on what the data says, scale what's working, and document the systems so they run on the days the fractional leader isn't there.

Measurement comes first for a reason. Until the tracking is true, nobody can judge the rest, which is why my guide to marketing attribution starts there too.

When to hire one

The role fits best in these situations:

1. Seed to Series B software companies with a self-serve or product-led motion.
2. Founder-led marketing that's working but has hit the founder's ceiling on time.
3. A team that executes well but has no senior growth owner.
4. A company between growth leaders that needs the function to keep running while it hires.

It's the wrong fit if growth depends entirely on an enterprise sales team, or if there's no budget to execute anything. The hiring process is the same as when you hire a fractional CMO.

How fractional growth marketing engagements work

Most fractional growth marketing engagements bill hourly or on a retainer. Senior fractional marketing help typically runs about $100 to $170 an hour. Ad spend and tools should be billed straight to your accounts, never through the fractional leader.

Agree on the number, the days, the decision rights and the length up front. Six months is a sensible minimum, because the first quarter goes to fixing measurement and building the plan. Some engagements end with a full-time hire, sometimes the fractional leader themselves. At Pieces, my consulting work led to an offer to join as Head of Growth full-time.

Fractional head of growth responsibilities, in short

Fractional head of growth responsibilities add up to owning growth: one number, the channels and budget that move it, the site and content, the agencies, the reporting and the launches. Hire someone who has held the full-time job, give them access and one number, and judge them on it within a quarter.

If that's the role you need, here's how I work as a fractional Head of Growth, and how engagements are structured.

Fractional Head of Growth FAQs

What does a head of growth do?

A head of growth owns a company's growth number, usually signups, activations or revenue, and the channels, budget, experiments and reporting that move it. At a startup, the role covers acquisition and conversion across search, paid, content, creators and the website, and it often includes managing agencies and hiring the first growth team.

What is a fractional chief growth officer?

A fractional chief growth officer is a part-time growth executive with a C-level title. The responsibilities match the head of growth role: owning the growth number, the channel mix, the budget and the reporting. The title usually reflects the company's size or the leader's seniority, not a different job.

How much does fractional growth leadership cost?

Fractional growth leadership typically costs about $100 to $170 an hour for senior help, billed hourly or as a monthly retainer. At two days a week, that's roughly $6,400 to $10,900 a month. Ad spend and tools are separate and should be billed directly to your company's accounts.

What's the difference between a fractional growth consultant and a head of growth?

The difference between a fractional growth consultant and a head of growth is ownership. A consultant advises on a specific question, like a channel audit, and steps away. A head of growth owns the weekly number, runs the budget and agencies, does much of the execution, and answers for results.