Fractional CFO vs Accountant: What's the Difference?
Your accountant keeps you compliant. A fractional CFO makes you more profitable. Most growing UK businesses need both — here's how the roles split.
5 min read
Key takeaways
- Accountants look backwards (compliance); CFOs look forwards (strategy).
- An accountant files your accounts and tax; a CFO owns forecasting, pricing and margin.
- They are complementary, not alternatives.
- The switch point is usually when decisions start costing more than mistakes in the ledger.
The core difference
An accountant's job is accuracy and compliance: bookkeeping, VAT returns, payroll, statutory accounts and corporation tax. The output is a correct record of what already happened, filed on time.
A fractional CFO's job is decisions: how to price, where margin is leaking, whether you can afford the hire, what happens to cash if your biggest customer pays 30 days late. The output is a plan and the numbers to defend it.
Side by side
A simple way to think about the split:
- Accountant: year-end accounts, corporation tax, VAT, payroll, HMRC correspondence, bookkeeping.
- Fractional CFO: rolling cash flow forecasts, budgets, pricing and margin analysis, KPI dashboards, funding and lender packs, scenario planning, board reporting.
- Accountant: paid annually or monthly for a defined compliance scope, often £150–£800/month for an SME.
- Fractional CFO: paid a monthly retainer, typically £1,500–£8,000 + VAT, for ongoing finance leadership.
When your accountant is enough
If your business is under roughly £300k of revenue, has one revenue stream, predictable costs and no debt or investors, a good accountant plus clean cloud bookkeeping will usually cover you. Adding CFO-level support before there is complexity to manage is spending money on insight you can't yet act on.
When you need a CFO too
The typical triggers are:
- Revenue is growing but the bank balance isn't.
- You can't confidently say which products, services or clients actually make money.
- You're planning a hire, a loan, an investment round or an acquisition.
- You're making six-figure decisions on gut feel.
- Management accounts arrive too late to be useful, or not at all.
Can one person do both?
Some practices offer both, and that can work well for smaller businesses. Be clear about which hat is being worn and what is actually contracted: a compliance engagement with an occasional chat is not the same as forecasting, pricing work and board-level challenge. Ask for the specific deliverables and their frequency in writing.
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