Resources·for SMEs
The real cost of outsourcing your bureau vs. building in-house finance
A decision framework for SME owners weighing an outsourced accounting bureau against building an in-house finance function, and what actually drives the total cost of each.
Most SMEs start with an outsourced bookkeeping bureau, because it's the obvious low-commitment choice at ten or fifteen employees. Somewhere between twenty and fifty, the question resurfaces: is it time to bring finance in-house? The honest answer depends less on headcount than on what you're actually asking your finance function to do.
Neither option is inherently cheaper. Each has costs that only show up once you're living with the decision. Worth totalling both properly before assuming the answer is obvious.
What each model actually costs
outsourced bureau
Predictable fee, limited context
A fixed monthly fee covers bookkeeping and statutory filings. What it typically doesn't cover: management commentary, forward-looking forecasts, or fast turnaround when you need a number today rather than at the usual monthly cadence. The bureau knows your ledger; it rarely knows your business.
in-house finance
Full control, full overhead
A controller or finance manager understands the business deeply and can turn around ad hoc requests quickly. The cost isn't just salary. It's recruitment, management time, software licensing, and the risk of a single point of failure if that person leaves.
The costs that don't show up in the obvious comparison
| Cost | Outsourced bureau | In-house |
|---|---|---|
| Turnaround time | Fixed monthly cadence. Urgent requests often wait for the next cycle | Same-day, but only while the person is available and not overloaded |
| Business context | Limited. Bureaus manage many clients and rarely go deep on any one | High, but concentrated in one person's head unless documented |
| Recruitment & onboarding | None. The bureau's staffing is their problem, not yours | Real cost every time the role turns over, plus a ramp-up period |
| Key-person risk | Low. The bureau has coverage across staff | High for a single hire, especially at the smaller end of this range |
| Software & tooling | Usually bundled into the bureau's own systems | A separate line item, such as accounting software, reporting tools, or both |
A rough illustration at 30 employees: a full-time controller might run €75,000/year all-in once salary, employer costs, benefits, and software are counted. A bureau handling the same bookkeeping volume might charge €2,000/month (€24,000/year), plus a part-time fractional CFO layer at €1,500/month (€18,000/year) to cover the management reporting the bureau doesn't provide: a combined €42,000/year. The bureau-plus-fractional combination is often cheaper in pure cash terms at this size; the gap narrows, and can reverse, as transaction complexity grows.
A decision framework
| Factor | Favors outsourced bureau | Favors in-house |
|---|---|---|
| Transaction complexity | Simple, high-volume, repetitive | Multiple entities, currencies, or revenue models |
| Decision speed needed | Monthly cadence is genuinely sufficient | You need same-day answers to run the business |
| Growth trajectory | Stable, slow-changing business | Fast-growing, frequent changes to the model |
| Owner's numeracy | Owner is comfortable interpreting financial statements unaided | Owner needs someone to translate the numbers into decisions |
| Owner's capacity | Owner has time to review and act on monthly reports themselves | Owner is stretched thin elsewhere and needs a partner to own this, not just report it |
The middle path most businesses actually land on
Very few SMEs make a clean, permanent choice between the two. The common landing point is a hybrid: the bureau continues handling bookkeeping and statutory compliance, while the owner, or a part-time or fractional finance hire, owns the management reporting and decision-making layer on top. That hybrid works best when both sides are looking at the same underlying numbers, rather than the bureau's ledger and the owner's spreadsheet slowly drifting apart.
The move to a hybrid is rarely a deliberate strategic review. It's usually forced by one specific event: a bank starts asking for monthly management accounts instead of annual filings alone (seewhat your Hausbank actually checks), the business makes its first hire dedicated to finance or operations, or transaction volume grows past the point where the owner can eyeball the bank balance and trust their own read on the business. Any one of these is usually the moment the hybrid gets built, whether or not anyone calls it that.
The gap that causes the drift, closed
The hybrid model only works if both sides see the same numbers. Otherwise, the bureau's ledger and the owner's spreadsheet quietly drift apart, updated on different schedules and reconciled only when someone notices they no longer match. AHQ Financials sits on top of your accounting data, whether it's a bureau, a bookkeeper, or an in-house controller keeping the books underneath it, so the owner and whoever handles bookkeeping are always looking at one live number.