Headline numbers — what UK fractional CFOs charge
Across the UK market in 2025/26, fractional CFO pricing clusters into four bands:
| Band | Monthly retainer | Typical engagement | Who it fits |
|---|---|---|---|
| Reporting tier | £195 – £750 | 0.5-1 day/mo · monthly accounts review + KPI pack | Pre-seed founders, sub-£500k ARR |
| Operating tier | £1,500 – £4,000 | 2-4 days/mo · forecasting, board pack, runway | Seed/post-seed, £500k-£3M ARR |
| Scale-up tier | £4,000 – £8,500 | 5-8 days/mo · active strategy, hiring plan, fundraise prep | Series A-B, £3M-£15M ARR |
| Senior/PE tier | £8,500 – £15,000+ | 8-12 days/mo · PE-experienced, board-grade | £15M+ ARR, PE-backed, M&A live |
Day rates as a sanity check: most independent UK fractional CFOs price between £950 and £1,800 per day. Senior operators with PE or IPO experience push £1,800-£2,500/day. Compare that to a full-time CFO base salary of £140k-£250k (plus pension, equity, NIC, bonus) and you can see why fractional wins below ~£25M ARR.
The four fee models you'll be quoted
UK fractional CFO firms (including the operators we match through GoCFO) typically structure fees in one of four ways:
- Flat monthly retainer. Most common. Fixed days per month, fixed fee. Predictable for both sides. Best for ongoing operating cadence (board pack, monthly forecast, KPI review).
- Day-rate plus retainer floor. A small retainer (e.g. £750/mo) reserves the operator's attention; additional days billed at day rate (e.g. £1,250/day). Best when usage is lumpy — quiet months and intense pre-board months.
- Pure day rate, project-based. Used for finite work — fundraise prep (8-15 days over 6-10 weeks), exit prep (10-20 days), system implementation, audit readiness. Best when there's a defined deliverable.
- Equity + cash hybrid. Reduced cash retainer (50-70% of normal) plus 0.1-0.5% in options vesting over 24-48 months. Best when cash is constrained and the CFO genuinely buys the story.
What you almost never see: success fees. Capital-raising success fees from a CFO conflict with the CFO's duty to advise against raising at a bad price. Reputable fractional CFOs decline them. If someone offers a 2-5% raise-success fee, they're acting as a corporate finance adviser, not a CFO.
What you should pay by company stage
Pre-seed / pre-revenue (sub-£250k ARR)
You probably need a monthly accounts review and a runway model, nothing more. The reporting tier (£195-£500/mo) covers this. A senior fractional CFO sat on your account is overkill — your bookkeeper plus a 1-day-per-month fractional check-in is usually enough.
Seed / post-seed (£500k-£3M ARR)
This is where most founders over-buy. You need 2-4 days a month: monthly board pack, 3-statement forecast, KPI dashboard, hiring plan, basic financial controls. The operating tier (£1,500-£4,000/mo) is right. You don't need 10 days a month at this stage.
Series A / scale-up (£3M-£15M ARR)
Now you genuinely need 5-8 days a month: monthly close discipline, real budget vs actual, cohort metrics if you're SaaS or D2C, vendor and customer contract review, and active management of an in-house finance hire (usually a Financial Controller below the fractional CFO). Scale-up tier (£4,000-£8,500/mo) is the right level.
PE-backed / late-stage (£15M+ ARR)
If you're PE-backed and below the threshold for a full-time CFO, you usually want someone with prior PE-portfolio experience — they know what the board will ask before it asks. Senior tier (£8,500-£15,000/mo), 8-12 days a month. At this point you should also be planning the full-time CFO hire 12-18 months out.
What's actually included in a fractional CFO retainer
A standard UK fractional CFO operating-tier retainer (£1,500-£4,000/mo) typically includes:
- Monthly board pack — P&L, cash, KPIs, commentary, runway
- 3-statement rolling 12-18 month forecast, updated monthly
- Monthly call with founder/CEO (60-90 min) + email/Slack ongoing
- Quarterly board meeting attendance (if board exists)
- KPI dashboard design and review (SaaS metrics, unit economics)
- Cash flow management, payment runs review
- Hiring plan modelling — what each new hire does to runway
- Light vendor and contract review (SaaS spend rationalisation)
What is normally scoped out (paid extra or by a Financial Controller below the CFO):
- Bookkeeping, AR/AP processing, expense management
- VAT returns, payroll, statutory accounts, corporation tax filing
- Audit preparation (often a £5-15k project fee on top)
- Fundraise process management (data room, lender/VC packs — usually a project)
- System implementation (Xero to NetSuite, FP&A tool rollout)
- HR/people work (a CFO is not your HR director)
The cleanest stack at £3-15M ARR: bookkeeper (£200-£600/mo) + Financial Controller (full-time, £55-85k) + fractional CFO (£4-8k/mo). At sub-£3M ARR, the FC role doesn't exist yet — your fractional CFO oversees the bookkeeper directly.
Day rates vs monthly retainers — which is cheaper?
Day rates are usually slightly more expensive on paper than equivalent retainers — but they let you flex up and down with workload. The maths:
| Engagement shape | Day rate | Equivalent retainer (auto-discount) |
|---|---|---|
| 2 days/mo, ad hoc | £1,250 × 2 = £2,500 | £2,000 (~20% retainer discount) |
| 4 days/mo, fixed | £1,250 × 4 = £5,000 | £3,800 (~24% discount) |
| 8 days/mo, fixed | £1,250 × 8 = £10,000 | £7,200 (~28% discount) |
Why the retainer discount? Three reasons: the fractional CFO can build their schedule around predictable revenue; admin overhead drops; deeper context means each day delivers more. If your usage is reasonably stable, retainer wins. If you have 3 quiet months a year, day rate plus a small retainer floor wins.
Equity-only and equity-plus-cash deals
Equity-only fractional CFO deals exist but are rarer than founders think. The honest market reality:
- Pure equity, no cash: only viable when the operator genuinely believes in the company AND has enough cash flow from other engagements. Most won't do it without a Series A on the visible horizon. Typical: 0.25-1% over 4 years, with cliff.
- Equity + reduced cash: more common. The CFO takes 50-70% of normal cash plus 0.1-0.4% in options. Usually negotiated at seed or pre-Series A.
- Full cash + token equity: most common at Series A+. Standard cash retainer plus 0.05-0.15% as alignment.
The trap to avoid: a CFO who only takes equity has every incentive to advise raising more, raising faster, and at the highest valuation — none of which may be in your interest. Some cash component keeps the incentives clean.
For more on this trade-off, see our guide on fractional CFO vs full-time — the equity calculation is different for full-time hires where the base salary is the dominant cost.
Pricing red flags
- Success fees on capital raised. See above — creates a conflict between the CFO's advice and their payslip.
- Quoted in "hours" not days. Hour-billing is rare at this level and tends to indicate someone who'd rather be a bookkeeper. Real fractional CFO work is non-linear; daily is the standard unit.
- Large upfront fees with no clear scope. A discovery/scoping engagement at £2-5k is fine. A £25k "set-up fee" before any work is usually overpriced or a sales-led firm passing through a bookkeeper.
- Bundled with audit, tax filing, or payroll at low monthly prices. Often an accountancy practice trying to up-sell a "CFO" who is actually a senior partner doing 2 hours of review per month. Check the engagement letter — what's the named CFO actually committing to?
- Refusal to put days-per-month in writing. The single most useful clause in any fractional CFO contract is the committed days per month. If a firm won't write it down, walk.