When should an SME outsource finance?

An SME should look hard at outsourcing finance when the managing director is spending more time on reports than on running the business, when the in house team cannot produce timely and reliable management accounts, when the cost of a senior finance hire is difficult to justify, or when growth is outpacing the finance function. Most firms hit at least one of these triggers between £500k and £5m of turnover.

What outsourcing finance actually means

Outsourcing finance does not mean handing over the whole function and hoping for the best. In practice it is a spectrum. At one end, a bookkeeper handles transactions. In the middle, a finance partner runs the monthly accounts, the cash view and the reporting. At the other end, a part time finance director sits on the leadership team and brings senior thinking into strategic decisions.

Most firms buy a mix. The aim is to get the capability you need at a cost that makes sense for the size of the business, while the function itself stays yours to direct.

The five triggers

1. The managing director is doing finance work

If the managing director is pulling management accounts together, chasing debtors or reconciling the bank, that is a clear signal. Every hour spent on finance is an hour not spent on customers, strategy or the team. Handing over a defined set of tasks usually pays for itself quickly on that basis alone.

2. The in house team cannot keep up

Management accounts arriving six weeks after month end are not management accounts. They are history. If reporting is consistently late, if the bookkeeper is overwhelmed, or if the business has outgrown the processes that worked at a smaller scale, the finance function has hit its limit. A senior hire is one answer. Outside help is often faster and cheaper.

3. You need senior finance capability occasionally, not constantly

Most firms of this size do not need a full time finance director. They need an FD for a few days a month, particularly around board meetings, funding, major deals and the annual plan. Paying a full time salary for a part time requirement is wasteful. A part time FD fills the gap properly.

4. Growth is outpacing the numbers

A business growing at 20 per cent or more a year outgrows its finance function faster than almost any other area. What worked at £2m of revenue breaks at £5m. You need better cash visibility, proper budgeting, management accounts that mean something, and somebody who can talk to a bank about funding. If finance has not kept pace, decisions start getting made on gut feel.

5. A specific event forces the issue

Preparing for investment, a major loan, a sale of the business, a tax enquiry, or the sudden loss of a key finance person all force the question. An external partner can step in quickly without the delay and the risk of a permanent hire.

The three models

Most firms use a blend of these. The right blend depends on where you are and what you need.

Model	What it covers	Typical cost	When it fits
Outsourced bookkeeping	Transactions, bank reconciliation, VAT returns, basic reporting	£500 to £2,000 a month	Micro or early stage businesses, or where the in house team is buried in transactions
Outsourced finance function	All of the above, plus monthly management accounts, cash forecasting, budgeting and commentary	£2,000 to £6,000 a month	Most firms between £1m and £5m of turnover with no senior finance hire
Part time FD	Financial leadership, board reporting, funding, commercial support	£1,500 to £5,000 a month depending on days	Businesses that need senior finance thinking a few days a month, usually layered on top of the above

Costs are indicative for UK firms in 2026. Your actual figure depends on complexity, volume and scope.

What you keep and what you hand over

Doing this well is not a binary choice. Most businesses keep some things in house because the knowledge and the relationships are inseparable from the role. A typical split looks like this.

Kept in house. Strategy, customer relationships, the sales pipeline, operational decisions, final sign off on accounts and payments, and senior recruitment.

Handed over. Bookkeeping, month end, management accounts, cash forecasting, VAT, payroll processing, year end and tax, and the reporting that supports the board conversation.

The managing director remains accountable for the numbers regardless of who prepares them. A good partner makes that accountability easier to meet, not harder, because you get a clearer view of your own business rather than a thinner one.

Cost comparison

For most firms in the £500k to £5m range, the honest comparison looks like this.

In house team

• A bookkeeper on £30,000 to £40,000.
• A financial controller on £55,000 to £75,000.
• A part time FD on top when needed, or a full time FD on £100,000 and up.

Fully loaded, including employer National Insurance, pension, office and software, that is typically £120,000 to £220,000 a year for a function that can produce timely accounts and reporting worth reading.

External equivalent

• A finance team covering bookkeeping, month end, management accounts and cash, at £3,000 to £6,000 a month.
• A part time FD layered on at £2,000 to £4,000 a month for a couple of days.

Fully loaded that lands at £60,000 to £120,000 a year for comparable output. You also avoid the recruitment cost, the risk of a bad hire, and the overhead of managing a team.

The saving matters, but it is not the main reason to do it. The main reason is capability. An external team brings more combined experience than any single hire, visibility of how other similar businesses run, and better tooling than most small in house teams can justify buying.

When it is the wrong answer

Handing finance out is not always right. It is a poor fit when any of the following apply.

• You genuinely need somebody embedded in the business every day, and the finance conversations happen in corridors rather than in scheduled meetings.
• You have highly complex operations that depend on institutional knowledge built up over years.
• You want a senior hire for succession or equity reasons.
• You have not yet defined what good finance looks like in your business, and you risk handing out a broken process.

In that last case, a short piece of work to define the operating model before committing to anything long term is usually the better move.

How to choose a partner

Four questions worth asking.

1. Who will actually do the work? You want a named team, not a ticket queue.
2. What does a typical month look like in their operating rhythm? Good partners run a consistent cycle you can plan around.
3. What does their output look like? Ask for sample management accounts and a sample board pack. The quality of the reporting tells you more than any sales pitch.
4. How do they handle the handover if it does not work out? A confident partner is clear about exit terms from day one.

Common questions

At what turnover should an SME outsource finance? There is no fixed threshold. Most firms start handing over elements from around £500k of turnover and move to a fuller arrangement between £1m and £5m. The trigger is capability, not size.

Is it cheaper than hiring? Usually, once fully loaded employment costs, recruitment, software and management time are counted. The better question is whether you get more capability for the same money. For most firms of this size you do.

Will I lose control of my numbers? No, if you choose a partner who reports properly. You sign off the accounts, approve the payments and set the strategy. Somebody else carries the work that gets you to the decision point.

Can I hand over part of it and keep the rest? Yes, and most firms do. Bookkeeping in house with an external FD is common. So is bookkeeping and month end handed over with an internal controller holding the reins.

How long does it take to set up? Four to six weeks for a clean transition, less where the existing function is minimal. Month one is detail. By month three the rhythm is in place.

How we help

We work as the finance business partner to owner managed firms across the South East. We take the bookkeeping, payroll, VAT, year end and tax off your desk, run the monthly pack, the weekly cash view and the budget, and bring an FD to the table for the decisions that matter. Technology does the mechanical work quickly, which is what buys the time for the conversations worth having.