Fractional CISO vs Full-Time CISO

Fractional CISO vs full-time CISO

Same seniority, different commitment. Here is how the two options actually differ, and how to tell which one your company needs right now.

Side-by-side comparison

Dimension	Fractional CISO	Full-time CISO
Commitment	Part-time, sized to a fixed number of hours a month	Full-time employee, one company
Cost structure	Monthly retainer or a fixed-scope project fee	Base salary, equity, benefits, payroll overhead
Scope	Compliance readiness, questionnaires, cloud security review, audit management	All of the above, plus day-to-day security operations, hiring a team, incident response on call
Accountability	Owns the outcome for the engagement: the audit, the questionnaire, the assessment	Owns security as an ongoing function, reports to the board, builds and manages a team
Ramp time	Days, since the practitioner already runs this playbook	Weeks to months, including hiring, onboarding, and building context
Flexibility	Scale hours up during an audit period, back down after	Fixed headcount cost regardless of workload that month

Scope: what each one actually does

Fractional CISO

Runs a specific outcome: get you to SOC 2 or ISO 27001, answer the security questionnaire blocking a deal, review your cloud environment for the gaps an auditor finds first. The work is scoped and dated.

Full-time CISO

Owns security as a permanent function: policy, tooling decisions, a security team, incident response on call, vendor contracts, and board reporting on an ongoing basis, in addition to compliance work.

Accountability: who answers for what

On a fractional engagement

The practitioner is accountable for the engagement they were hired to run: getting the audit report, clearing the questionnaire, closing the gaps in the assessment. That accountability is bounded by the scope of work.

On a full-time hire

The CISO is accountable for the security posture of the company as a whole, indefinitely, including things nobody scoped in advance: a new vendor risk, a lost employee laptop, a novel incident. That is the tradeoff for the higher cost.

When to hire which

Hire fractional when...

You have a specific trigger, a blocked deal, an upcoming audit, a stalled questionnaire, and you need it solved without adding permanent headcount. Most startups under a few hundred people fit here.

Hire full-time when...

Security work has become large and constant enough to fill a real job: a dedicated team to manage, security built into every product decision, and enough budget to justify a senior salary plus the team under them.

Do both in sequence

Many companies run a fractional CISO through their first audit or two, then convert to a full-time hire once the security function has grown past what a part-time retainer can reasonably cover.

What it costs

Xorabyte publishes its fractional pricing on the pricing page: fixed-scope work from $1,500 for a security questionnaire rescue, $6,000 to $9,000 for a gap assessment, and $12,000 to $20,000 for a full SOC 2 readiness sprint. Retainers run $4,000 to $12,000 a month across three tiers, depending on hours and scope.

A full-time CISO adds a base salary on top of equity and benefits, before you count the cost of building out a team under them. Public salary data for Canada puts total compensation for the role roughly in the $150,000 to $280,000+ CAD range depending on seniority, company size, and how the figure is measured, well before equity or benefits are added.

For a full breakdown of what drives a fractional CISO's price up or down in Canada specifically, see how much a fractional CISO costs in Canada.

Frequently asked

Is a fractional CISO as good as a full-time CISO?

For a bounded outcome, such as getting SOC 2 ready or clearing a security questionnaire, an experienced fractional CISO delivers the same result. For a large, ongoing security function with a team to manage, a full-time hire eventually makes more sense.

How much cheaper is a fractional CISO?

Xorabyte's fixed-scope work starts at $1,500 and its retainers run $4,000 to $12,000 a month, a fraction of a full-time CISO's total compensation package. See the pricing page for the full ladder.

Can a fractional CISO sign our SOC 2 report or attest on our behalf?

No. A licensed CPA firm issues the SOC 2 report after an independent audit. A fractional CISO runs the readiness work and manages the auditor relationship, but does not certify anything.

When should we convert from fractional to full-time?

When the workload becomes constant rather than project-based, typically once you are managing a dedicated security team or running multiple frameworks in parallel with enough volume to justify a full salary.

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