Fractional CFO in London
Most UK seed and Series A rounds close in London, which is why the London fractional CFO is a different animal from the same seat elsewhere. The work is weighted towards the raise: the model that survives a partner's questions, the data room that is ready before the term sheet, and the monthly investor pack after it. The day rate sits at the top of the UK band for that reason, not for the postcode, and nearly every engagement runs hybrid with a day in the office.
A fractional CFO in London runs £800 to £1,500 a day, which is £6,133 to £11,500 a month at two days a week. The bands for all eleven seats come off live listings on the bench and are published openly as data.
Who on the bench is based in London
2 fractional CFOs on the bench list London as their base, and the rest of the UK's fractional CFOs serve the city remotely or hybrid. Each profile carries a day rate.
What is different about a fractional CFO in London
The round is the job, and the investor set is local
The funds writing UK seed and Series A cheques this year, Notion, LocalGlobe, Seedcamp, Octopus, Mercia and the rest, mostly sit within a few miles of each other and talk to each other. A London fractional CFO who has closed a round with one of them knows the diligence list the next one will send, because it is largely the same list. That shared knowledge is the thing you are paying the London rate for.
FCA-authorised firms need a finance function that files returns
London carries the bulk of the UK's fintech and regulated start-ups, and an authorised firm's finance function owes the regulator as much as the board: capital adequacy, client money reconciliations where they apply, and periodic returns with deadlines that do not move for a raise. A fractional CFO at a fintech here has to know which returns are due and who signs them, which is a narrower pool than fractional CFOs generally.
A London board expects a face in the room once a month
Remote is normal, but London boards have not given up the in-person board meeting, and a fractional CFO who presents the numbers on a screen to a room that is physically together loses the discussion afterwards, which is where the decisions get made. Budget a day on site a month and the travel time around it, and ask the operator where they actually are.
The good ones are carrying three or four clients, and the diary is the constraint
London has more senior fractional finance people than any other UK city and the ones worth hiring are rarely idle. The question is not whether somebody is available but on which days, and whether those days survive a raise at one of their other clients. Ask how many clients they hold, what happens when two close at once, and get your days written into the engagement.
What the seat owns here
- The fundraise model, the data room and the diligence answers, usually the first job
- The monthly investor pack after the round, built once and then kept honest
- Regulatory returns and capital planning where the company is FCA-authorised
- R&D tax relief and EIS or SEIS compliance, which London start-ups lean on heavily
- Managing the outsourced bookkeeper and the audit relationship from the first audit onward
What to ask a fractional CFO in London
- Which round have you closed as the CFO in the room, with which fund, and in which year?
- How many clients are you carrying today, and which days are mine?
- Have you produced regulatory returns for an authorised firm, and which permissions?
- What is the smallest company you have held the seat at, and what went wrong there?
Where it goes wrong
- Paying the London rate for a big-company name whose smallest employer turned over half a billion
- Hiring the CFO after the term sheet rather than three months before the raise
- Treating a London postcode as a reason to pay the top of the band when the experience is ordinary
When this is the wrong hire
If the finance work is bookkeeping, VAT and a year-end, a London fractional CFO is the wrong purchase and an outsourced accountant at a fraction of the rate is the right one. The seat earns its rate when there is a raise, a board or a regulator asking questions the bookkeeper cannot answer.
Companies in London that raised this year
Each of these announced a seed or Series A round in 2026, and each is the kind of company the fractional CFO seat is built for. The announcement is linked so the reader can check it rather than trust it.
- Dex, AI talent agent matching engineers to roles. Seed, £3.9m, April 2026. Announcement
- Sprive, Mortgage overpayment and remortgage app. Series A, $10m, September 2026. Announcement
- HelmGuard, AI agents for risk and compliance assessments. Seed, $7.3m, September 2026. Announcement
- Metris Energy, Data layer for renewable energy assets. Seed, $5m, September 2026. Announcement
- Nettle, AI risk inspection software for insurers. Seed, £3.6m, October 2026. Announcement
- Cori Clinical, AI workspace for clinical trial design. Seed, $4m, October 2026. Announcement
- Kord, Onboarding, AML and payments for regulated firms. Series A, £6.4m, July 2026. Announcement
- Happl, Employee benefits platform for multinationals. Series A, £8.1m, May 2026. Announcement
Common questions
How much does a fractional CFO cost in London?
The UK band published on this site comes off live listings and London sits at the top of it: expect the upper half for fundraise work, regulated sectors and exit preparation. Most engagements run one to three days a week, and the monthly figure at two days is shown on the cost page linked below.
Do London fractional CFOs work on site?
Hybrid is the norm. Most hold their clients remotely with a day a month on site for the board meeting or the management meeting, and more during a raise or an audit. Fully remote is possible and cheaper, but London boards still expect to see the person presenting the numbers in the room.
Should a London start-up hire a fractional CFO before raising?
Yes, and earlier than most do. The model, the data room and the diligence answers take weeks to build properly, and a CFO brought in after the term sheet inherits whatever the founder built in a hurry. Three months before the raise is the useful point.
See the rate before you speak to anybody
Browse fractional CFOs on the bench, each with a day rate on their own profile, checked by hand against their LinkedIn and CV before it went up. Or brief Operator Search and three researched candidates come back against the brief in five business days.