The core difference in one sentence
A management accountant makes the numbers correct. A fractional CFO makes the numbers change decisions.
Both matter. Neither replaces the other. And most UK SMEs need them in a specific order — bookkeeper first, then management accountant (or financial controller), then fractional CFO. Skipping the middle step is the most expensive mistake we see in early-stage finance hires.
Scope side-by-side
| Activity | Management accountant / FC | Fractional CFO |
|---|---|---|
| Monthly close | Owns it | Reviews output |
| Management accounts production | Owns it | Defines the format |
| Board pack | Produces draft | Writes the commentary, owns the conversation |
| 13-week cash forecast | Maintains | Reviews + escalates risk |
| 12-18 month rolling forecast | Builds the model | Owns the assumptions, the narrative |
| VAT, payroll, corp tax | Files / oversees | Reviews exposure |
| Vendor and contract review | Processes | Negotiates strategic ones |
| Hiring plan modelling | Builds the model | Decides what's affordable |
| Fundraise prep | Supplies data | Runs the process |
| Investor relationships | — | Owns |
| Strategic decisions | — | Owns |
The pattern: the management accountant owns operational outputs (close, accounts, VAT). The CFO owns strategic outputs (board, fundraise, investor relationships, the big decisions). They overlap on the forecast — the FC builds it, the CFO owns the assumptions.
Seniority — and what a day actually looks like
A management accountant in a £5M-revenue UK business is typically:
- ACA/ACCA/CIMA qualified or part-qualified, 2-7 years post-qual
- £40-£65k base salary (full-time)
- Spends 60-70% of time on close, accounts, reconciliations, supplier setup
- Reports to the founder or CEO; rarely attends board meetings
A fractional CFO at the same business is typically:
- 15-25 years post-qualification, multiple ex-CFO roles, often with funded scale-up or PE experience
- £3,000-£8,000/mo retainer for 2-5 days/mo
- Spends 0% of time on close; 40% on strategy, 30% on forecasting, 20% on board/investor, 10% on contracts/decisions
- Attends every board meeting; runs the conversation alongside the founder
The implication: paying £8k/mo for a fractional CFO to do management accountant work is a waste of money. Conversely, asking a £55k FC to negotiate a £2M revenue-share deal with a major customer is asking for a £200k mistake.
Cost comparison — apples to apples
Comparing approximate UK annual cost in 2025/26:
| Role | Annual cost | Hours/year | £/hour effective |
|---|---|---|---|
| Bookkeeper (outsourced, £400/mo) | £4,800 | ~120 | £40 |
| Management accountant (full-time, £55k) | £80,000 all-in | ~1,900 | £42 |
| Financial Controller (full-time, £75k) | £105,000 all-in | ~1,900 | £55 |
| Fractional CFO (operating tier, £4k/mo) | £48,000 | ~360 | £133 |
| Fractional CFO (senior tier, £8k/mo) | £96,000 | ~720 | £133 |
| Full-time CFO (£180k base) | £260,000 all-in | ~1,900 | £137 |
What's interesting: per-hour, a senior fractional CFO costs roughly the same as a full-time CFO — but you're buying ~360 hours of senior strategic attention rather than 1,900 hours of mixed work. For most UK SMEs that's the better trade.
Which do you hire first?
The right order, by revenue stage:
- £0-£500k: Bookkeeper only (outsourced, £200-£500/mo). Founder runs everything else.
- £500k-£2M: Bookkeeper + part-time/outsourced management accountant (£1,500-£3,000/mo). Maybe a fractional CFO at reporting tier (£500-£1,500/mo) for monthly check-in.
- £2M-£5M: Bookkeeper + full-time management accountant or part-time FC + operating-tier fractional CFO (£2,000-£4,000/mo).
- £5M-£15M: Bookkeeper + full-time FC + scale-up tier fractional CFO (£4,000-£8,000/mo). This is the sweet spot for fractional.
- £15M+ or active M&A or PE-backed: Begin transition to full-time CFO with FC and senior analyst beneath.
The mis-step we see most often: founders hire a £55k management accountant at £600k revenue and call them a CFO, then wonder why the board pack is wrong and the forecast doesn't model unit economics. The MA is doing their job correctly — they're just being asked to do a job they weren't hired for.
The right stack — what's the role split at scale-up?
For a £5M revenue UK scale-up, the cleanest stack:
- Outsourced bookkeeper (£400/mo) — owns transaction entry, reconciliations, supplier setup, expense management.
- Full-time FC at £75k — owns monthly close, management accounts production, statutory accounts oversight, VAT/payroll/CT oversight, line-manages the bookkeeper, builds the forecast model, prepares the board pack draft.
- Fractional CFO at £5k/mo — owns the board conversation, investor relationships, strategic decisions, hiring plan affordability, contract negotiation, fundraise process. Line-manages the FC.
Total annual cost: about £190k. Coverage: full mid-market finance function. Compare to one full-time CFO at £260k who would do less of the strategic work and oversee less of the operational work because they'd have to do some of it themselves.
Common mis-hires
- Hiring a "CFO" who's actually a management accountant. Watch for: no scale-up or PE experience, can talk close and accounts but can't talk strategy, salary expectation £60-80k. Symptoms: board pack is accurate but un-useful, fundraise runs through the founder unaided.
- Hiring an FC at FC pay and expecting CFO output. The FC delivers what they're trained for; the strategic work just doesn't happen. Six months in the founder wonders why nothing has changed.
- Skipping the management accountant entirely. Hiring a £6k/mo fractional CFO with no FC underneath, then expecting them to do close and reconciliations. Either the CFO does it badly (wasted money) or it doesn't happen (worse).
- Hiring a senior CFO at £8k/mo for £800k revenue. Over-buying. The CFO will be bored within 6 months and the founder will resent the cost. Reporting tier (£500-£1,500/mo) is right at this stage.