AASB 16 managed service vs self-service: Which model fits your Australian business?

Six years into AASB 16 and you'd think the hard work is behind you. The adoption is done, the opening balances are set, and there's a process in place, even if it's still a spreadsheet.

What catches teams out is the ongoing volume. Rent reviews communicated to the property team months before finance hears about them. Fleet modifications arriving in bulk files with no clear breakdown. CPI adjustments due at month-end when the close is already under pressure. One vehicle lease extension executed six months ago, never communicated to finance, and now the right-of-use asset and lease liability have been wrong for half a year. The auditor's management letter is rarely a surprise in hindsight.

Most Australian finance teams have settled the question of whether to comply with AASB 16. The live question is which operating model keeps them compliant, month after month, without consuming the close every time: dedicated software your team runs, or a managed service where a specialist team runs the monthly cycle for you. Both are genuinely good answers. Which one fits depends on your team, your portfolio, and what's already gone wrong.

AASB 16 has been mandatory for most Australian for-profit entities since 1 January 2019 (six or seven years for many organisations). The initial adoption questions are long settled. The real challenge now is sustaining accuracy across a portfolio that never stops changing: rent reviews, CPI adjustments, fleet renewals, early terminations, extensions negotiated mid-term.

What each model actually means

Self-service software means your team runs the process inside a dedicated lease accounting platform. The software automates the maths: AASB 16 calculations, amortisation schedules, journal generation, remeasurement on modifications. Your finance team is responsible for loading lease data accurately, processing modifications when they occur, and producing the reporting packs. The software handles the complexity; your people own the workflow end to end.

A managed service means a specialist team runs the process on your behalf, inside that same platform. You provide the inputs: new leases, modifications, terminations, CPI adjustments. The managed service team validates every input before calculations run, reviews the outputs, prepares the journals mapped to your general ledger, and delivers a reconciled, audit-ready reporting pack each month. You retain full visibility and sign-off authority. You don't carry the processing weight.

Both models run on the same LOIS platform. The difference is whether your team drives the process or a team of CA-qualified lease accounting experts does it for you. For more background on what a managed service engagement actually covers, the plain-English guide to lease accounting managed services is worth reading first.

When self-service software is the right answer

Self-service works well, and for many Australian organisations it's the more cost-effective model. The fit criteria aren't complicated, but they need to be honestly assessed.

You have at least one CA-qualified accountant or finance controller in-house who understands AASB 16 in practice. Not just at a conceptual level, but in terms of modification triggers, IBR methodology, lease term judgements (including the "reasonably certain" extension option test), and what the auditors will ask for. The software does the maths; your team still needs to make the judgements that feed into it.

Your portfolio is relatively stable, with modifications arriving at a predictable, manageable pace. A portfolio of 50 to 100 property leases with few changes per month is a different proposition from a retail group with 200 store leases where rent reviews and CPI adjustments flow through constantly. If modifications are rare, the team can handle them as they come. If they're continuous, the process pressure is significant.

Your finance team has capacity at month-end to own the process fully. Lease accounting doesn't pause during the close. It peaks there. If your team is already stretched across period-end reconciliations, board reporting, and statutory obligations, adding three days of AASB 16 processing is a real workload problem that self-service doesn't solve.

You want direct, granular control over the GL reconciliation process. Some controllers prefer to be in the system themselves, running calculations, mapping journals, and seeing every step before anything posts. That control is available in self-service and is a legitimate preference, not a gap.

You've been running AASB 16 for several years, your processes are bedded in, and you've built team confidence. Many organisations start somewhere messier and arrive here through experience. If your team has accumulated real expertise and your process is documented and repeatable, self-service is often the natural steady state. The LOIS lease accounting platform is built for this model.

When a managed service fits better

The managed service case is strongest when complexity is high, expertise is scarce, or the cost of getting it wrong is immediate.

You don't have a dedicated AASB 16 specialist in-house. This is the most common driver. Many capable finance teams across Australian retail, logistics, transport, and infrastructure don't have a lease accounting specialist on staff. The controller responsible for AASB 16 may be excellent at their job and still not have the specific expertise to handle a complex fleet modification or an unusual IBR reassessment. A managed service provides that expertise each month without the cost of hiring for it.

You're running a high-modification portfolio, particularly a large fleet. Consider a transport or logistics company with 500 vehicles leased from providers like LeasePlan, SG Fleet, or Eclipx. Every month, a bulk data file arrives: new vehicles, terminated leases, CPI adjustments, price changes, extensions. Processing that file accurately and updating the AASB 16 position for each change isn't just time-consuming; it's an error surface. LOIS Fleet handles the automated cross-checking of incoming files against the existing portfolio. A managed service team reviews the changes before anything is posted. The combination is the only practical path to monthly accuracy at that volume. For detail on how the fleet processing works, see the guide to fleet lease management for finance teams.

Your auditors have already flagged AASB 16 in a management letter. Once the auditor has raised a finding, the next audit cycle carries heightened scrutiny. The bar for "demonstrating a controlled process" goes up. A managed service, run by CA-qualified lease accounting experts with a full timestamped audit trail behind every action, is a faster and more defensible path to restoring auditor confidence than rebuilding a spreadsheet-based process under pressure. The IFRS 16 audit preparation checklist covers what auditors look for in detail.

Your CFO needs audit-ready output without internal overhead. Some organisations are explicit about this: lease accounting is not a core internal capability they intend to build. The CFO wants a reconciled, audit-ready pack delivered each month and confirmation that the process behind it is controlled. That's the managed service value proposition precisely.

You're moving off spreadsheets for the first time and your historical data needs validating. Migrating from spreadsheet-based AASB 16 to a platform often surfaces errors that have accumulated over years: missed modifications, wrong IBRs, extensions that were never formally processed. A managed service team can validate the opening position, clean up historical data, and establish a controlled baseline before the ongoing monthly process starts. Starting the platform on shaky data is the most common cause of early close problems for teams that move to self-service without that foundation.

The hybrid reality: starting on managed service, moving to self-service

Many Australian organisations don't stay in one model indefinitely. The most common path is to start on managed service for the first 12 to 24 months, then transition to self-service once the team is trained, the processes are documented, and the platform is fully embedded.

This works because both models run on the same LOIS platform. There's no data migration, no system change, no re-implementation. The managed service team hands over a clean, validated lease register and a documented process. The transition is a change in who drives, not where you're driving.

It's also worth knowing the reverse is possible. Some organisations run self-service for years, then move to managed service when their lease accounting specialist leaves, when a merger significantly increases portfolio complexity, or when an audit cycle demands a step-change in confidence. The platform stays the same; the operating model adjusts.

For organisations unsure where to start, the AASB 16 compliance self-assessment guide identifies specific process gaps that indicate which model is the better initial fit.

What to ask any managed service provider before you sign

The managed service market is not homogeneous. Large advisory firms offer lease accounting services alongside their audit practices. Software vendors offer "managed" tiers that amount to processing your uploads with limited validation. Knowing what to ask separates a genuine managed service from an expensive data entry arrangement.

Are the people running my compliance CA-qualified accountants? Not trained software users, not support staff. CA-qualified specialists who understand AASB 16 in practice, including modification triggers, IBR methodology, and the judgements your auditors will probe. The calculations are automated; the judgements are not.

Do you validate my lease data before running calculations, or do you process what I send? These are different things. A service that validates will describe a review step before calculations run, a feedback loop to your team, and a documented record of what was queried and resolved. A service that processes will describe a loading step and an output. The difference is where errors are caught: before the journals are prepared, or in the next audit.

Can I see the full audit trail? You should have visibility into every calculation, every modification, and every change in the system, with timestamps. Your auditors will ask for this. If your managed service provider can't show you a complete, system-generated audit trail for every action, they aren't operating a controlled process.

Will I receive a locked periodic reconciliation report? The output should include a report that agrees the lease subledger to your general ledger balances, automatically, before anything is posted. If your team has to manually reconcile the managed service output against the trial balance each month, you're carrying reconciliation risk that the service hasn't removed.

Will I have one named expert who knows my portfolio, or am I dealing with a rotating support queue? The difference compounds over time. A dedicated expert who has seen your portfolio for twelve months knows why your largest lease has an unusual IBR, remembers the fleet extension you actioned in March, and proactively flags the rent review due in September. A support queue handles what you raise, when you raise it.

Frequently asked questions

So which model fits?

If you recognised the opening scenario (modifications arriving from fleet providers, an auditor who's already raised a finding, a team at capacity during close, no dedicated lease accounting specialist on staff), the criteria in the table above point clearly to managed service, at least for the next year or two while processes are established and confidence in the platform builds.

If your team has the expertise and the capacity, and your portfolio is stable, self-service is genuinely the right answer, and there's no reason to pay for a service your team doesn't need. The honest test is the criteria above, not a preference for one model or the other.

If you're not sure which column you sit in, LOIS offers a free five-minute AASB 16 compliance health check that maps your current process against both models and identifies the gaps most likely to surface in your next audit.