When ASC 842 and IFRS 16 arrived, property finance teams treated them the way you treat a big implementation: a hard project with a deadline, a scramble to get compliant, and then a sense of relief when the first compliant statements went out. The project closed. The team moved on. And that, quietly, is where the real risk began.

Because lease accounting is not a project that finishes. It is a process that runs forever. The standards did not just change how you recognize leases once, at adoption. They created a permanent obligation to keep every lease correctly measured as it changes, and leases change constantly. A renewal, a rent escalation, an early termination, a modification, each one reopens the accounting that everyone assumed was settled. The compliance you achieved at adoption decays the moment the portfolio moves, which is immediately and continuously.

This is the gap that catches property CFOs. They think of lease accounting as done, a box checked years ago, when in reality it is a standing exposure that generates fresh risk every reporting period. This piece is about that exposure: why lease accounting is never finished, where the recurring errors actually come from, and why treating it as a closed project is how a clean adoption turns into a restatement two years later.

Why "Compliant" Has a Short Shelf Life

The core misunderstanding is treating compliance as a state you reach rather than a state you maintain. You can be perfectly compliant on the day you file, and non-compliant three months later, without changing a single thing about your process, simply because your leases changed and your accounting did not keep up.

Lease portfolios are not static. Modifications, renewals, early terminations, and remeasurements require continuous, accurate recalculation, and the evidence says this is where teams struggle most. Despite years of experience with the standards, many finance teams still find the day-to-day maintenance harder than the initial adoption. That is the tell. The adoption was a one-time effort with a deadline and full attention. The maintenance is a permanent effort with no deadline and, in most organizations, far less attention. Roughly 58 percent of public companies found the standards more complex and time-consuming than they expected, and most of that surprise lives in the ongoing work, not the initial setup.

For a property business, this is amplified by simple volume. A property company's entire operation is leases, hundreds or thousands of them, each with its own renewal options, escalation clauses, and modification history. The thing the standard governs is not a side activity for a property CFO. It is the core of the business, changing every day.

A Framework: The Four Events That Reopen a "Closed" Lease

The way to hold this risk is to know exactly what reopens it. A lease that was accounted for correctly does not stay correct on its own. Four kinds of event force a remeasurement or a fresh judgment, and each is a moment where a "closed" lease quietly becomes a live risk again.

1. Modifications and renewals

Any change to a lease's terms, a renewal exercised, a rent renegotiated, a space expanded, can trigger a remeasurement of the lease liability and the right-of-use asset. The recurring error here is timing. Auditors find that modifications are frequently recognized late, when the paperwork is finalized or at year-end, rather than at the modification date where the standard requires it. In a property portfolio where renewals and changes happen constantly, a small lag in catching each one compounds into a materially wrong lease population.

2. Index and rate changes, where the two standards diverge

This is a trap for anyone reporting under both standards. Under IFRS 16, a change in an index or rate that drives lease payments requires remeasuring the liability. Under ASC 842, that same change is usually treated as a variable expense in the period, with no remeasurement unless a specific trigger occurs. A property company operating across the US and international markets is therefore accounting for the same rent escalation two different ways, and has to track both correctly. Applying one standard's logic to the other is a clean route to an error.

3. Discount rate discipline over time

The discount rate is one of the most common sources of recurring error, and it is subtle. The rate must reflect conditions at each lease's commencement date. The shortcut auditors catch most often is applying a single rate, often the one set at transition, across all leases regardless of when they began. Every lease added since adoption needs its own rate reasoning, and a team treating the rate as a one-time decision rather than a per-lease, ongoing judgment is accumulating error with every new lease signed.

4. Embedded and missed leases

Not every lease looks like a lease. Arrangements buried inside service contracts, equipment agreements, or vendor deals can contain embedded leases that belong on the balance sheet. Missed embedded leases produce an incomplete lease population, which is exactly the kind of finding that surfaces in an audit. This is not a one-time sweep you did at adoption. Every new contract the business signs is a fresh chance to miss one, which is why identifying them requires ongoing coordination between accounting and the operations, procurement, and legal teams who actually sign the deals.

If you can see these four events happening in your portfolio and know that each one is being caught and remeasured on time, you are managing the standing risk. If any of the four is being handled by memory, by spreadsheet, or at year-end, the risk is accumulating quietly between now and your next audit.

The Two Risks Underneath the Accounting

The four events create technical exposure, but a CFO should see the two deeper risks they feed into, because those are what actually hurt.

The first is the audit and restatement risk. Auditors specifically request evidence for every event that triggered a remeasurement, a complete record of what changed, when, and why. A business that cannot produce that trail on demand is not just inconvenienced; it is exposed to findings and, in the worst case, a restatement. Lease-accounting errors have forced real companies to restate financial statements, and a restatement is one of the most credibility-damaging events a finance function can suffer. It signals to lenders and investors that the numbers could not be trusted, which is a far larger problem than the original error.

The second is the people risk, and it is underestimated. Lease accounting depends on institutional knowledge and cross-functional communication, and organizational change directly threatens both. When the person who understood your lease modifications leaves, or a reorganization moves lease ownership to someone new, the discipline that kept the portfolio correct can walk out the door with them. A process that lives in one experienced person's head is a standing risk wearing a friendly face, right up until that person is gone and the next audit reveals what only they knew.

Why This Is Sharper in Property, and What Reduces It

Property intensifies all of this for one reason: scale and change velocity. A business whose entire portfolio is leases has the largest possible surface area for every one of the four events, and the highest frequency of them. The standing risk is not a corner of a property CFO's world. It is proportional to the size of the portfolio, and it grows with it.

What reduces the risk is not heroic effort at year-end. It is capturing lease changes as they happen, with the documentation the standards require attached at the moment of the change, rather than reconstructing intent months later when an auditor asks. The mechanism matters less than the principle: the further the gap between when a lease event occurs and when it is correctly accounted for, the more room there is for error to accumulate. A finance function that records the modification, the renewal, and the rate change at the moment it happens, with the evidence attached, has converted a standing risk into a controlled process. One that catches up quarterly or annually is betting that nothing material slipped through in between.

Looking Ahead

The direction of travel makes this more urgent, not less. Standards continue to converge and evolve, disclosure expectations keep rising, and auditors and investors expect cleaner, more continuous evidence than they did even a few years ago. The tolerance for "we'll sort the leases out at year-end" is shrinking. In that environment, treating lease accounting as a closed project is a bet against the trend, and it is the property companies with the most leases that have the most to lose from making it.

The CFOs who handle this well have made one mental shift: from thinking of lease accounting as something they completed to thinking of it as something they operate. It is not a compliance milestone in the past. It is a live process that generates risk every period and has to be managed every period. The clean adoption was never the finish line. It was the starting line for a process that does not stop, and the sooner a CFO treats it that way, the smaller the surprise waiting at the next audit.

Frequently Asked Questions

Q1. Isn't lease accounting a one-time compliance project we already finished?
No. Adoption was one-time, but compliance is continuous. Every renewal, modification, rate change, and new lease can trigger a remeasurement or a fresh judgment, so a portfolio that was compliant at filing can drift out of compliance within months if the ongoing changes are not caught and accounted for correctly. Lease accounting is a process you maintain, not a project you complete.

Q2. What are the four events that reopen a closed lease?
Modifications and renewals, index or rate changes, discount-rate decisions on new leases, and embedded or newly identified leases. Each forces a remeasurement or a fresh accounting judgment. A lease accounted for correctly at commencement does not stay correct on its own once any of these occur.

Q3. Why do ASC 842 and IFRS 16 create extra risk for companies reporting under both?
Because they treat some events differently. Notably, an index or rate change requires remeasuring the liability under IFRS 16 but is usually treated as a period variable expense under ASC 842 unless a trigger occurs. A company reporting under both must account for the same event two different ways and track each correctly, which is a common source of error.

Q4. What lease accounting errors do auditors find most often?
Applying a single discount rate across all leases instead of one reflecting each lease's commencement date, recognizing modifications late rather than at the modification date, and missing embedded leases inside service or equipment contracts. These recurring errors produce incorrect valuations and incomplete lease populations, which are frequent audit findings.

Q5. What is the real consequence of getting this wrong?
The serious outcomes are audit findings and, in the worst case, a restatement of financial statements. A restatement is highly damaging because it tells lenders and investors the numbers could not be relied on. Lease-accounting errors have forced real companies to restate, which is a far bigger problem than the underlying technical mistake.

Q6. Why is this a bigger risk for property companies specifically?
Because a property company's core business is leases, often hundreds or thousands of them, each with renewals, escalations, and modification histories. That gives property the largest surface area and highest frequency for every risk event, so the standing exposure is proportional to the portfolio and grows as it grows.

Q7. How does staff turnover affect lease accounting risk?
Significantly. Lease accounting depends on institutional knowledge and cross-functional communication with operations, procurement, and legal. When the person who understood the portfolio's modifications leaves, or a reorganization moves ownership, the discipline that kept it correct can be lost, and the gap often surfaces only at the next audit. A process that lives in one person's head is a standing risk.

Q8. What actually reduces this ongoing risk?
Capturing each lease event, modification, renewal, rate change, at the moment it happens, with the required documentation attached, rather than reconstructing it at year-end. The larger the gap between when a lease event occurs and when it is correctly accounted for, the more error accumulates. Closing that gap converts a standing risk into a controlled, evidence-backed process.