Leases sit in the background of most businesses. Offices, vehicles, machinery, IT hardware. Each one is a financial commitment. Record it badly and the errors spread through your accounts.

Lease accounting is more than a compliance task. It shapes your balance sheet, your loan covenants and how investors read your results. This article covers what accuracy requires and what goes wrong without it.

What Lease Accounting Covers?

Lease accounting records and financial calculations

Lease accounting records two things. The right to use an asset, and the duty to pay for it. Under IFRS 16 lease accounting, a lessee puts nearly every lease longer than 12 months on the balance sheet.

At commencement, you record a lease liability. It equals the present value of future lease payments. You also record a right-of-use asset. It starts at the liability, plus prepaid rent and initial direct costs.

Here is a simple case. A five-year office lease costs £50,000 a year, paid in arrears. At a 6% borrowing rate, the liability starts at about £210,600.

Year one interest is about £12,600. At 8%, the liability falls to about £199,600. One rate assumption moves the balance by roughly £11,000.

After day one, the liability grows with interest and shrinks with each payment. The asset is depreciated, usually straight-line, over the shorter of the lease term and its useful life.

In the case above, year one costs about £54,800 in depreciation and interest. Year five costs about £45,000. The old rent line was a flat £50,000. Expense now runs front-loaded. Your profit profile changes.

Two exemptions exist. Short-term leases and low-value assets can stay off the balance sheet. Firms often misuse the second one. Many small items can add up to a material amount.

UK businesses on FRS 102 face a similar shift. Amendments effective for periods starting on or after 1 January 2026 bring most leases onto the balance sheet. Check which framework applies to you.

How Small Errors Distort Your Accounts?

Lease inputs feed each other. A wrong discount rate changes the liability. A wrong term changes the liability, the asset and the expense pattern. One bad input travels far. Each error moves assets, liabilities, depreciation and interest.

The incremental borrowing rate deserves extra care. It reflects what you would pay to borrow similar funds, over a similar term, with similar security. Use a rate that matches the lease currency and length. A single group rate rarely fits.

These errors appear most often:

Ratios, Covenants and Valuation

On-balance-sheet leases raise reported debt. Gearing climbs. Return on capital employed usually falls. EBITDA rises, because rent becomes depreciation and interest.

A business growth strategist will test these shifts before backing any expansion plan.

Covenants often rely on these metrics. A misstated liability can trigger a breach you never saw coming.

It can also hide one until it is too late. Review covenant definitions.

Some use frozen GAAP, which ignores the new lease rules. Talk to your lender before the first reporting date, not after.

Buyers adjust for lease debt in due diligence. They compare it with your reported figures. Gaps raise questions and questions delay deals. Messy records can also cut the price. Clean data shortens the process and protects value.

Disclosures and Audit Readiness

Disclosures add another layer. You report depreciation by asset class, interest on lease liabilities, short-term lease expense and variable payments outside the liability. You also give a maturity analysis of undiscounted payments.

Auditors test completeness first. They ask how you know every lease is in the register. Then they test inputs against contracts. Weak controls lead to adjustments, delays and higher audit fees.

Building a Reliable Lease Process

Start by identifying leases. A contract contains a lease when it gives control of an identified asset for a period in return for payment.

Check substitution rights. If the supplier can freely swap the asset, there may be no lease. Data hosting, logistics and shared office deals often hide leases.

Next, build a full lease register. Capture every contract, start date, payment schedule, break clause and option. Most companies find forgotten leases at this stage.

Then fix the routine. A short checklist works:

Software helps if the data is clean. Spreadsheets break at scale. Formulas get overwritten and versions get lost.

Dedicated tools produce schedules, journals and disclosures with an audit trail. Test the output too. Recalculate one lease by hand each quarter and compare it with the system.

Keep the standard close, too. The IFRS Foundation publishes the objective of IFRS 16 and its amendments on its official standard page. Check it when your lease portfolio changes.

Managing Lease Changes Throughout the Year

Managing lease changes and payment adjustments

Lease accounting requires ongoing attention, not just a year-end review. Businesses sign new agreements, renew existing contracts and change payment terms throughout the year. Each event can affect reported balances and future expenses.

Set up a process for finance teams to notify the lease accounting owner whenever a contract changes. Review supplier invoices against agreed payment schedules and investigate unexpected differences.

Keep signed amendments, approval records and supporting calculations alongside each lease entry. This creates a clear audit trail and helps prevent missed adjustments.

Lease Data Supports Better Decisions

Accurate records also help planning. They show cash commitments by year. They show cost per site. They show exposure to index-linked rent rises. They show when to renegotiate or exit.

Property portfolios gain most. Compare rent per square metre against occupancy. Flag sites with break clauses inside 18 months. These checks come straight from clean lease data.

Plans change. When a lease term, scope or payment changes, remeasure the liability. Do it when the change happens, not at year end. Treat rent concessions and extensions as separate events, each with its own test.

Next Steps

Audit your register this quarter. Test discount rates and lease terms. Reconcile it to the ledger. Then document the process so it survives staff changes. Assign an owner and a review date before you close the books.