When a Part-Time Finance Director Starts to Pay for Itself: A Framework for £1m–£10m SMEs
Photo: Francisclarke, CC BY-SA 4.0, via Wikimedia Commons
There is a stage in the life of a UK SME where the finance function is technically covered and substantively absent. The bookkeeper files the VAT returns, the accountant produces year-end accounts ten months after the year ended, and the owner-manager makes the pricing, hiring and borrowing decisions using a bank balance and a feeling. Nothing is broken. Nothing is being managed either.
The £60,000 question is not really about £60,000, and it is not about hiring a full-time finance director at a salary the business cannot yet carry. It is about whether a retained arrangement — two or three days a month of senior finance capability — returns more than it costs. For a business in the £1m–£10m band, the answer usually turns on five specific triggers rather than on ambition or headcount.
What senior finance help actually costs
Part-time finance directors in the UK typically work on a retained day rate, broadly £600–£900 a day depending on sector, location and the complexity of the business, or a monthly retainer of £1,200–£3,500 for a defined number of days. The indicative annual cost looks roughly like this:
| Commitment | Indicative annual cost | What it usually covers |
|---|---|---|
| One day a month | £8,000–£12,000 | Management accounts review, rolling cash forecast, board pack |
| Two days a month | £15,000–£25,000 | Pricing and margin work, budget cycle, lender reporting |
| Four days a month | £30,000–£45,000 | Turnaround, funding round, recruitment of a permanent finance lead |
Set that against a single point of gross margin on £4m of turnover, which is £40,000 a year. Set it against a term loan renewal negotiated without a reliable forecast, or a pricing schedule last reviewed when input costs were materially lower. The comparison is rarely close.
What the gap actually costs
The cost of doing without does not appear as a line in the accounts, which is precisely why it goes unchallenged.
Management accounts that arrive late. Figures produced six or eight weeks after month end describe a business that no longer exists. Decisions get made on last quarter's reality, and problems get a further quarter to bed in.
Pricing drift. Where prices are set once and adjusted occasionally, margin erosion often shows up as a slow decline that nobody is measuring. By the time it appears in the annual accounts, a full year of trading has been priced wrongly.
Cash surprises. A profitable business can still run out of room. Without a rolling 13-week forecast, a large VAT quarter, a payroll run and a slow-paying customer can collide without warning.
Expensive borrowing. Lenders and invoice finance providers price uncertainty. A business that arrives with clean management accounts, a defensible forecast and a covenant history tends to get better terms than one that arrives with a spreadsheet rebuilt the night before.
Reliefs left on the table. Capital allowances, research and development claims, patent box, share schemes and structuring decisions all reward early attention. They are rarely the reason to hire, but they are frequently part of the payback.
Five triggers that justify the hire
No single trigger is decisive, but two appearing at once is a strong signal.
1. Margin pressure you cannot explain. If gross margin has moved by more than two or three points without a clear operational cause, the business needs someone who can decompose it by product, customer and input cost — and then price accordingly.
2. Debtor or stock complexity. Debtor days drifting past 45, a concentration of two or three large customers, or stock that turns noticeably slower than it did two years ago. Working capital is where growth most often breaks.
3. A lender or investor conversation is coming. Refinancing, a commercial mortgage, an acquisition, an equity raise or a grant application. These processes reward preparation and punish improvisation, and the timetable is usually shorter than expected.
4. The owner is spending more than two days a month on finance. Chasing invoices, rebuilding the cash sheet, answering the accountant's questions. That is senior time doing junior work, and it displaces selling, hiring and product decisions.
5. A structural change is underway. A second site, a new entity, a management layer being hired beneath the owner, or a partnership being incorporated. Structure creates questions about transfer pricing, remuneration and reporting that a bookkeeper is not resourced to answer.
What a sensible engagement looks like
A good part-time finance director does not arrive and start producing reports nobody reads. The first 90 days usually follow a recognisable shape: understand the numbers and the commercial model, stabilise the basics, then build forward.
That means rebuilding the management accounts pack so it is short, monthly and decision-oriented; constructing a rolling 13-week cash forecast and a simple annual model; reviewing pricing at customer and product level; documenting the finance calendar of VAT, payroll, statutory accounts and corporation tax dates; and agreeing three or four measurable priorities with the owner.
A useful check on any candidate is whether they have worked at the business's size and sector before, and whether they are willing to define what they will not do. A part-time FD who quietly absorbs the bookkeeping is an expensive bookkeeper.
The cheaper option, and when it stops being cheaper
An enhanced bookkeeping arrangement — a bookkeeper plus cloud accounting software plus a quarterly review from the accountant — is a reasonable answer for a stable business with simple transactions, one product line and no external funding. It typically costs a fraction of a retained FD and covers compliance well.
It stops being sufficient when judgement, rather than recording, becomes the constraint. The test is straightforward: can the owner, sitting down on any given Monday, say what the gross margin was last month, what it should have been, which three customers are least profitable, and what the cash balance will be in 13 weeks? If not, the gap is not administrative.
A one-page test
Before committing, write down the four numbers the business most needs to see monthly, the two decisions currently being made without them, and the annual value of getting each decision right. If the total exceeds the retainer by a comfortable margin, the hire is justified on arithmetic rather than instinct. If it does not, the answer may be a better bookkeeper and a clearer reporting template — for now.
This article is general guidance rather than financial or tax advice. Engagements and rates vary by sector and region, and the right structure should be confirmed with an accountant before appointment.
