You've reached the point where data matters: investors want metrics, teams argue about whose numbers are right, and someone has mentioned AI. But a full-time Head of Data feels like a big hire for where you are. That's the gap a fractional Head of Data fills.
In short
A fractional Head of Data is an experienced data leader who works with you a few days a month, usually on a monthly retainer. They set direction, fix the foundations, hire and guide your first data people, and make tool and vendor decisions. You get senior judgement for a fraction of a full-time salary. It suits companies from roughly 20 to 200 people that rely on data but don't yet need a full-time leader.
What a fractional Head of Data actually does
- Sets a data plan tied to business goals: what to measure, what to build first, and what to ignore.
- Creates one version of the truth by agreeing definitions for revenue, customers and churn so every team reports the same numbers.
- Chooses and negotiates tools such as Snowflake, BigQuery, dbt and BI tools, without vendor bias.
- Hires and mentors your first data engineer or analyst, and makes sure they build things that last.
- Keeps costs in check, so the data bill doesn't quietly grow faster than the business.
- Prepares you for AI by getting data clean, documented and governed before you spend on models.
- Handles board and investor reporting with metrics that hold up to scrutiny.
Signs you need one
- Different teams bring different numbers to the same meeting.
- You're about to hire your first data engineer and nobody senior can brief or interview them.
- Your data or cloud bill is growing and nobody can explain why.
- Reports break regularly and the fix is "ask the one person who knows".
- Investors or the board are asking for metrics you can't produce quickly.
- You want to use AI, but your data is scattered across tools and spreadsheets.
Fractional, full-time or consultancy?
| Fractional Head of Data | Full-time Head of Data | Project consultancy | |
|---|---|---|---|
| Commitment | A few days a month, monthly | Permanent hire | One defined project |
| Typical cost | Monthly retainer, a fraction of a salary | Senior data roles in Australia often exceed A$200,000 a year, before super and recruiting costs | Fixed or day-rate for the project |
| Best for | Direction, hiring and decisions while you grow | Data is core to the product and there's a team to lead | A specific build or fix with a clear end |
| Risk | Limited hands-on time | Expensive if hired too early | Nobody owns things after handover |
Salary context: principal-level data engineers in Sydney and Melbourne advertise from about A$210,000 (Lumify Learn, 2026). Leadership roles typically sit above that.
What it costs
Fractional arrangements are usually priced as a monthly retainer for a set number of days, rather than by the hour. Price depends on seniority and how many days you need. For context, contract data leaders in Australia average around A$1,400 a day (Talent International, March 2026). At Nadi, Fractional Head of Data starts from A$6,000 a month.
What the first 90 days look like
- Weeks 1–3: understand. Meet the people who use data, review the platform and the bill, and list what's broken, risky or wasteful.
- Weeks 4–6: decide. Agree the metrics that matter, a short roadmap, and any quick cost savings.
- Weeks 7–12: deliver. Fix the foundations, set up ownership and alerts, and hire or brief the people who'll run it day to day.
When it's not the right fit
If you need a large platform built quickly, a fractional leader alone won't have the hours. Pair them with a delivery team, or start with a fixed-scope project like Data Foundations. And if data is already your core product with a team of ten or more, you probably need a full-time leader.
Not sure where you stand? Start with our free data cost calculator, or book a 30-minute call and we'll tell you honestly whether you need us.
Common questions
What is a fractional Head of Data?
An experienced data leader who works with your company a few days a month on a retainer, setting data strategy, fixing foundations, hiring and guiding data staff, and making tool decisions, without the cost of a full-time executive.
When should a company hire a fractional Head of Data?
Typically when teams disagree on numbers, you are about to hire your first data engineer, the data bill is growing unexplained, or investors want metrics you cannot easily produce, but you do not yet need a full-time data leader.
How much does a fractional Head of Data cost in Australia?
It is usually a monthly retainer for a set number of days. Contract data leaders in Australia average around A$1,400 a day. Nadi offers Fractional Head of Data from A$6,000 a month.