The Real Cost of Keeping It All In-House

After a year or two of juggling half a dozen back-office providers, bringing everything in-house starts to look like the obvious fix. Hire a finance manager, then an HR person, maybe an IT admin. One team, one office, no vendor wrangling. The integration problem dissolves because everyone works for you.

The picture isn't wrong. It's incomplete, because at SME scale the all-in-house model swaps the coordination tax for two costs that are easy to underestimate: everything that rides on top of a salary, and the structural underutilisation of specialists who don't have a full plate of their specialty.

The salary is the visible part of the iceberg

When an owner mentally prices an in-house hire, they usually price the base salary and stop. The true annual cost stacks several more layers on top, every one of them real cash or real owner time:

• Statutory on-costs. Superannuation at the current guarantee rate, workers compensation premiums, and payroll tax once your total wages cross your state or territory's threshold. Each is set by an authority you can check directly: the ATO for super, your state insurer for workers comp, your state revenue office for payroll tax.
• Leave, and cover for leave. Annual and personal leave are paid time the role isn't producing, and someone still has to run payroll and pay suppliers during those weeks — either a contractor you pay for, or work you absorb.
• Recruitment and ramp. Finding the person costs money and months; the early period of any tenure runs well below full productivity. Amortise both over a realistic tenure, not over forever, because back-office roles turn over.
• Software, equipment and workspace. The accounting stack, payroll platform, devices and a share of office costs follow the role, not the provider.
• Your management time. An employee needs supervision, one-on-ones, reviews and development. Those hours come out of the most expensive calendar in the business: yours.

The quieter cost: paying full-time for part-time-shaped work

The heavier problem is utilisation. A genuinely capable finance manager, HR advisor or IT administrator is a specialist, and most SMEs simply do not generate a full-time load of any single specialty. So one of two things happens. Either the specialist spends a large share of their week on work below their skill level, which you're paying specialist rates for, or the role is stretched across several disciplines, which recreates the exact capability gap you were trying to close: one person covering fields they're only partly trained in.

In-house also concentrates key-person risk. One employee holding all of payroll, compliance and reporting is a single point of failure for leave, resignation and error, which is its own version of the fragility described in founder dependency, just relocated one desk over.

How to cost it honestly for your own business

Rather than trusting anyone's published figure, build the number yourself. The method matters more than the answer:

• Start with current market salary data for the role in your city, from live job ads or a recruiter you trust.
• Add the statutory on-costs at today's rates from the ATO, your state insurer and your revenue office.
• Add recruitment cost and a productivity-adjusted ramp period, spread over a realistic tenure.
• Add software, equipment and your own supervision hours priced at what your time is actually worth.
• Then divide the total by the hours of genuinely specialist work your business produces in that field each week. That last step is the one owners skip, and it is where the model usually falls over.

When in-house genuinely wins

None of this means never hire. In-house is the right call when the specialist workload is truly full-time, when deep industry-specific knowledge compounds inside one head, or when the function is so close to your competitive edge that you want it owned, not serviced. The mistake is treating in-house as the default cure for fragmentation, when the actual disease was disconnection. A connected back office solves the integration problem without loading a growing business with fixed salary cost and idle specialist capacity; run the numbers above before you sign an employment contract, and pressure-test the result with your accountant, who can see your actual figures where an article can't.