IFRS vs Local GAAP: What Changes on Transition

Moving from a national accounting framework to IFRS is rarely just a relabelling exercise. IFRS is generally more principles-based, more oriented to economic substance and fair value, and more demanding on disclosure than most local GAAPs. This guide highlights the differences that most often move the numbers, and the practical steps of a transition. Specific national GAAPs differ, so treat these as the usual pressure points rather than a universal list.

Where the numbers most often change

Leases

This is frequently the single largest adjustment. Many local frameworks keep operating leases off balance sheet, with a straight-line rental expense. Under IFRS 16, a lessee recognises a right-of-use asset and a lease liability for almost all leases, and splits the charge into depreciation and interest. The result is a larger balance sheet, higher reported operating profit and EBITDA, and a reclassification of lease cash flows into financing.

Development costs and other intangibles

Under IAS 38, research is always expensed, but development costs must be capitalised once the strict criteria are met (technical feasibility, intention and ability to complete and use or sell, probable future economic benefits, and reliable measurement). Some local GAAPs expense all development spending, or make capitalisation optional; moving to IFRS can bring an internally generated intangible asset onto the balance sheet. IFRS also prohibits recognising internally generated goodwill and most internally generated brands.

Deferred tax

IAS 12 uses a comprehensive temporary-difference (balance-sheet) approach: deferred tax is recognised on differences between the carrying amount of an asset or liability and its tax base, not just on timing differences in the income statement. Every IFRS remeasurement — fair-valued property, ROU assets, capitalised development, fair-value financial instruments — potentially creates a new temporary difference and therefore deferred tax. In practice deferred tax grows and becomes more visible on transition.

Financial instruments

IFRS 9 classifies financial assets by business model and cash-flow characteristics, measures many at fair value, and requires a forward-looking expected credit loss model for impairment — so provisions against receivables are recognised earlier than under an incurred-loss local model. Derivatives are recognised at fair value on the balance sheet, which some local GAAPs do not require.

Revenue

IFRS 15 applies a single five-step model based on the transfer of control of goods or services to the customer. Timing of recognition can shift — for bundled arrangements, variable consideration, or contracts recognised over time — relative to a local risks-and-rewards or completed-contract approach.

Presentation and disclosure

Even where measurement is similar, presentation often differs: the required set of primary statements, the current / non-current split, the statement of changes in equity, the use of other comprehensive income, and — most visibly — a far more extensive set of notes, including judgements, estimation uncertainty, financial-risk and related-party disclosures.

Other differences that often surface

Beyond the areas above, several others commonly move on transition. Impairment under IAS 36 uses a single recoverable-amount model, with goodwill and indefinite-life intangibles tested at least annually. Provisions under IAS 37 are recognised only where there is a present obligation, a probable outflow and a reliable estimate, and are discounted where the effect is material — often narrower than local practice. Employee benefits under IAS 19 bring defined benefit obligations onto the balance sheet, with actuarial remeasurements presented in OCI. Property, plant and equipment is componentised and depreciated by significant part, and major inspection or overhaul costs may be capitalised. Government grants (IAS 20) and borrowing costs (IAS 23, capitalised on qualifying assets) can also differ. Because these adjustments shift equity and earnings, they may affect loan covenants, distributable reserves and headline performance metrics — another reason to model the impact early.

Practical transition steps

1. Scope and diagnose. Map your current accounting policies against IFRS and flag the areas that will change — usually leases, intangibles, financial instruments, revenue, provisions and tax.
2. Fix the dates. Determine the reporting date and the date of transition, and decide how many comparative periods you will present.
3. Choose exemptions and policies. Select the IFRS 1 optional exemptions (deemed cost, business combinations, cumulative translation differences and others) and settle the accounting policy choices IFRS permits.
4. Build the opening IFRS balance sheet. Recognise, derecognise, reclassify and remeasure, taking the net adjustment to retained earnings.
5. Prepare the reconciliations. Reconcile equity and total comprehensive income from previous GAAP to IFRS, with enough supporting detail.
6. Refresh systems and controls. Update the chart of accounts, disclosure processes and, importantly, gather the extra data IFRS notes demand — many transition delays are data problems, not technical ones.
7. Engage auditors and stakeholders early. Agree the judgemental areas — control assessments, impairment, ECL assumptions — before the numbers are locked, and communicate the effect on key metrics to lenders and investors.

How it connects

The mechanics of the switch live in IFRS 1 first-time adoption. The biggest single measurement change is usually IFRS 16 leases, and the new presentation is governed by IAS 1.