Fractional pricing is almost linear in time. Retainers scale across the documented $4k–$20k/mo range with the hours you commit to. Three bands cover most engagements:
| Commitment | Typical monthly retainer | Best for |
|---|---|---|
| ~8 hrs / month | $4k – $8k | Advisory cadence, roadmap review, sounding board for an internal lead |
| ~16 hrs / month | $7k – $14k | Hands-on direction: unblocking a pilot, standing up governance |
| ~32 hrs / month | $12k – $20k | Near-embedded ownership before a full-time hire is in place |
Bands anchored to KORE1's 2026 $4k–$20k/mo range at 8–32 hrs/month; scaled within that band by hours. Data as of July 2026.
A fractional Head of AI is bought for judgment, not throughput. The retainer usually covers the decisions that are expensive to get wrong:
What a retainer typically doesn'tbuy: full-time production coding, running a large team, or being the permanent on-call owner. If you need those, you need a full-time hire — we compare the two on fractional vs. full-time AI leader.
The fractional executive market has reached $5.7B, growing 14% a year, with more than 40% of US SMB and mid-market companies projected to use fractional leadership by the end of 2026 (Vendux). The reason it's spreading: a fractional leader at $4k–$20k/mo carries none of the fixed cost of a full-time base ($250k–$540k; VerifyWise, May 2026), no equity grant, no severance exposure, and no multi-month ramp. You're buying the top of the skill curve for a slice of the time.
Put the two side by side and the math is stark. A full-year fractional engagement at the top band ($20k/mo × 12 = $240k) roughly matches a single year of a mid-band full-time base — but almost nobody runs a fractional engagement for a full year. Most are 90-day terms with a defined off-ramp, which is where the real savings live.
Fractional stops making sense the moment the role needs to be an owner rather than an advisor. The strongest signal is in the failure data: roughly 88% of AI agent pilots never reach production, and the ones that do share named ownership as their first trait (Digital Applied, 2026). A part-time retainer can name the owner and set them up — it can't be the owner indefinitely.
Choose full-time instead when:
Use the interactive estimatorto size a fractional retainer against a full-time hire and a placement fee, side by side, with the math shown. When you're ready for names, request a vetted shortlistand we'll match verified candidates to your hours band and budget. Not sure which role you need yet? Start with an Agent Readiness Audit.
How much does a fractional Head of AI cost per month?
Between $4,000 and $20,000 per month for 8 to 32 hours of work, depending on scope and seniority (KORE1, 2026). That works out to roughly $60,000–$180,000 per year equivalent for a fractional CAIO (McKelvey), well below a full-time base of $250k–$540k.
What is included in a fractional Head of AI retainer?
Typically: roadmap and use-case prioritization, build-vs-buy-vs-hire decisions, governance and risk guardrails, vendor and tooling selection, and hands-on unblocking of stalled pilots. What's usually not included: writing production code day-to-day, running a large team, or 24/7 on-call ownership — those signal you need a full-time hire.
How many hours a month do you get?
Fractional engagements cluster around three bands: ~8 hours (advisory, one day a fortnight), ~16 hours (hands-on direction, two days a month), and ~32 hours (near-embedded, roughly one day a week). Rates scale with hours across the $4k–$20k/mo range.
When is fractional the wrong choice?
When the role needs to own a team full-time, be in every room, or carry continuous accountability for a live production system. A two-days-a-month retainer can set direction but can't be the permanent owner — and ~88% of pilots that fail lack exactly that named owner (Digital Applied, 2026).