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Startup Finance Comparison

Fractional CFO vs Accountant
What's the Difference?

One looks backward. The other looks forward. Most UK startups need both — and the smartest ones get them from the same team.

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Fractional CFO vs Accountant: What's the Difference?

An accountant handles backward-looking compliance: bookkeeping, annual accounts, Corporation Tax returns, VAT filings, and payroll. A fractional CFO handles forward-looking strategy: financial modelling, cash flow forecasting, board pack preparation, fundraising support, KPI dashboards, and pricing decisions. An accountant tells you what happened. A fractional CFO tells you what's going to happen — and what to do about it. Most UK startups need both.

This is the most common question founders ask when they realise their finance function has a gap. They have an accountant — often a good one — but they're still making financial decisions without a forecast, a model, or a board pack. The answer isn't to replace the accountant. It's to add the layer that sits above compliance: fractional CFO services.

Better still, get both from the same team.

What Each Role Actually Does

📒

Accountant

Compliance & record-keeping
Backward-looking
  • Bookkeeping and bank reconciliation
  • VAT returns (quarterly or monthly)
  • Payroll and RTI submissions
  • Corporation Tax returns
  • Annual statutory accounts
  • Companies House filings
  • Self Assessment for directors
  • HMRC correspondence
📈

Fractional CFO

Strategy & decision support
Forward-looking
  • Cash flow forecasting (12–18 months)
  • Runway modelling with scenarios
  • Monthly board pack preparation
  • KPI dashboards (MRR, churn, CAC, LTV)
  • Fundraising financial model and data room
  • SEIS/EIS structuring and compliance
  • R&D tax relief claim management
  • Pricing and unit economics analysis
  • Hiring plan financial modelling
  • EMI option scheme setup

Notice the gap: the accountant's work stops where the most important startup decisions start. Your accountant can tell you last quarter's profit. They can't tell you whether you'll run out of cash in four months, whether your pricing covers customer acquisition costs, or whether your SEIS round is structured correctly.

Full Comparison

Capability Accountant Fractional CFO AccTek (Both)
Bookkeeping & Xero✓✗✓
VAT returns✓✗✓
Payroll & PAYE✓✗✓
Corporation Tax return✓✗✓
Annual statutory accounts✓✗✓
Monthly management accounts⚠️ Rarely✓✓
Cash flow forecasting✗✓✓
Board packs & investor reporting✗✓✓
KPI dashboards✗✓✓
Financial modelling✗✓✓
Fundraising support & data room✗✓✓
SEIS/EIS structuring⚠️ Basic✓✓ End-to-end
R&D tax relief claims⚠️ Basic✓ Identifies✓ End-to-end
EMI option schemes✗✓✓
Pricing & unit economics✗✓✓
Strategic decision support✗✓✓
Typical monthly cost £200–£500 £2,000–£7,000 £1,500–£6,000
Direction ← Backward Forward → ← Both →

The third column is the point. When accounting and CFO services come from the same team, the CFO layer sits directly on top of live compliance data. No waiting for last month's numbers. No reconciliation between two providers. No paying twice for the same data foundation.

The Real Problem: Two Providers Who Don't Talk to Each Other

When your accountant and your fractional CFO are separate providers, the CFO waits for the accountant's data, the accountant doesn't understand the CFO's reporting needs, and the founder becomes the bridge between them. The integrated model eliminates this friction entirely.
Your accountant
Records transactions in Xero
Files VAT, payroll, CT
→
Your fractional CFO
Needs that data for forecasts
Builds models, board packs
With two providers: the CFO emails the accountant on the 5th of every month asking for data. Gets it on the 12th. Produces the board pack on the 20th. Three weeks of lag for work that should take three days.
With AccTek, one team, one system, quick turnaround. Rich board pack by day 15.

This isn't theoretical. It's the single most common complaint founders have about their existing finance setup: "My CFO keeps asking my accountant for things, and it takes forever."

The integrated model solves this structurally. Your bookkeeping, your compliance, and your CFO strategy all run on the same data, maintained by the same team. The person building your forecast is the same person who reconciled your bank feed that morning.

Which Do You Need Right Now?

The answer depends on where your startup is today.

🌱

Just incorporated

No revenue, no employees, building MVP

Accountant
💰

Raising a seed round

Need SEIS, financial model, data room

Both
📊

£10k+ MRR, no board pack

Investors asking for reporting

Both
🔥

Burn >£20k/month

Can't answer "how long does our cash last?"

+ Fractional CFO
🚀

Pre-Series A

Need board packs, KPIs, fundraise prep

Both
🧾

R&D claims unfiled

Building product 12+ months, no claim submitted

Both

If the answer for your scenario is "Both" — and for most funded startups it will be — the next question is whether to hire two separate providers or one integrated team. For the reasons above, the integrated model wins.

Not sure which you need?

Book a free 30-minute call. We'll assess your current setup and tell you exactly where the gaps are.

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What It Actually Costs

Hiring an accountant and a fractional CFO separately typically costs £2,200–£7,500 per month combined. An integrated provider like AccTek delivers both from £1,500 per month — because the compliance layer isn't built twice and the data doesn't need to be transferred between providers.

Separate providers

  • Accountant: £200–£500/month (bookkeeping, VAT, payroll, year-end accounts)
  • Standalone fractional CFO: £2,000–£7,000/month (strategy, modelling, board packs)
  • Combined: £2,200–£7,500/month + friction + handoff delays

Integrated model (AccTek)

  • Accounting + fractional CFO: £1,500–£6,000/month depending on stage
  • Includes: Full compliance (bookkeeping, VAT, payroll, CT, annual accounts) + full CFO layer (forecasting, board packs, KPIs, fundraising, SEIS/EIS, R&D claims)
  • Saving: 20–40% versus separate providers, plus faster turnaround because data flows internally

For comparison

  • Full-time CFO hire: £200,000–£260,000/year (salary + NI + pension + recruitment)
  • AccTek fractional CFO: £18,000–£72,000/year — a 70–90% saving

Frequently Asked Questions

Do I need a fractional CFO if I already have an accountant?
If your accountant only handles compliance — filing returns, producing year-end accounts — then yes, you likely have a gap in strategic finance. Nobody is forecasting cash, building investor-ready models, or structuring your SEIS/EIS round. A fractional CFO fills that gap. The most efficient model is one provider that delivers both.
Can an accountant do fractional CFO work?
Some can, most don't. Traditional accountants are trained in compliance. Fractional CFO work requires different skills: financial modelling, fundraising preparation, SaaS metrics, investor reporting. Accounting firms that specialise in startups sometimes offer both, which is the most efficient model.
What's the difference between a fractional CFO and a virtual CFO?
"Fractional CFO" is the term used in the startup/VC ecosystem — it implies a named senior finance leader working part-time with growth-stage businesses. "Virtual CFO" is more common among established SMEs and describes ongoing management accounts and advisory. The scope is similar; the audience differs.
Is it better to have one provider or two?
One integrated provider is almost always better. When your accountant and CFO are separate, the CFO waits for data, they may use different chart of accounts structures, and the founder becomes the bridge. With one provider, the CFO layer sits directly on live accounting data — no handoffs, no lag, no duplication.
When should a startup add a fractional CFO?
Common triggers: preparing for a fundraise, burn exceeding £20k/month, investors requesting board packs, needing to structure SEIS/EIS, or making pricing and hiring decisions without financial models. If your accountant handles the past and nobody handles the future, it's time.
What should I look for in an integrated accounting + CFO provider?
Chartered qualifications (ACA or ACCA), startup specialism (not just SME generalists), cloud-native (Xero, not desktop software), experience with SEIS/EIS and R&D tax relief, fixed monthly pricing (not hourly billing), and a named senior person leading your engagement rather than a rotating team of juniors.

Related Resources

Fractional CFO for Startups Full service overview — tiers, pricing, what's included When to Hire a Fractional CFO 7 trigger points that tell you it's time Fractional CFO Pricing UK 2026 What it costs — with real numbers, not "contact us" Startup Board Pack Guide The document your fractional CFO builds every month Startup Accountant UK AccTek's complete startup accounting service SEIS & EIS for Startups Tax-advantaged investment schemes explained R&D Tax Relief Claim back qualifying development expenditure Startup KPIs Guide The metrics a CFO tracks that an accountant doesn't Startup Runway Calculator Free tool — model how long your cash lasts

Why Choose Between an Accountant and a CFO?

AccTek delivers both. One team. One Xero. One monthly fee.

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