The bottom line holds. Everything above it moves.

IFRS 18 will not change a single pound of profit. From January 2027 it changes almost everything about how that profit is told — and for smaller companies the clock started on New Year's Day.

Ask five finance directors what "operating profit" means and you will get five answers. One has parked a restructuring charge below it. Another has left rental income inside it. A third invented a line called "other income" in 2019 that has been quietly absorbing unrelated items ever since. None of them has broken a rule, because IAS 1 — the standard that has shaped financial statements for a generation — never defined operating profit at all.

That ends with IFRS 18.

The new standard, issued by the International Accounting Standards Board in April 2024, replaces IAS 1 for accounting periods beginning on or after 1 January 2027. The UK adopted it in December 2025 and the EU endorsed it in February 2026. Early adoption is allowed.

Nothing in it changes how a company measures anything. Revenue is recognised the same way, leases are capitalised the same way, expected credit losses are calculated the same way. What changes is the architecture: where each number sits, what it may be called, and what has to be explained. Profit for the year does not move a penny.

For large listed groups this has been a two-year project with a steering committee. For the company with a finance team of three, it has been a paragraph in a newsletter. That is a problem, and the reason is a single word: comparatives.

Three changes, and the first one is unavoidable

One — a defined shape for the income statement

Every item of income and expense in profit or loss must now be classified into one of five categories. Two subtotals become compulsory: operating profit or loss, and profit or loss before financing and income taxes.

The five categories

The detail that catches people out is that operating is a default. Anything not required to sit in one of the other four falls into it — including items that are volatile, unusual or plainly one-off. There is no longer an exceptional-items escape hatch below the operating line.

Two carve-outs exist, for companies whose main business is investing in assets or providing financing to customers — property investors, lenders, insurers. Most trading companies will never touch them, and the standard sets a deliberately high bar for claiming one.

Two — adjusted measures come inside the tent

If a company publishes a subtotal of income and expenses outside its financial statements to convey management's view of performance — "adjusted EBITDA" in a results announcement, "underlying operating profit" on a website — that measure is a management-defined performance measure, or MPM.

Every MPM must be disclosed in a single note: what aspect of performance it conveys, why management believes it useful, how it is calculated, and a reconciliation to the closest IFRS subtotal, showing the tax effect of each reconciling item. It therefore falls within the scope of the audit for the first time.

Three points of relief. Measures that are not subtotals of income and expenses are outside the definition — free cash flow, return on capital, customer numbers. Subtotals required or defined by IFRS itself, and familiar ones such as gross profit, are not MPMs. And a measure used only internally is not caught: a board pack is not a public communication. Many private companies will find they have no MPMs at all. The point is to make that determination deliberately rather than discover it during the audit.

Three — better grouping, and the end of "other"

IFRS 18 sets out how information is grouped: aggregate items that share characteristics, separate those that do not, and do not bury material information under a heading nobody can interpret. The label "other" is permitted only where no more informative description exists — and a material "other" balance now demands a further explanation of what is in it.

There is a related trap for the many companies that present operating expenses by function — cost of sales, distribution costs, administrative expenses. They must now disclose, in a single note, the totals for depreciation, amortisation, employee benefits, impairment losses and reversals, and inventory write-downs. In a lot of owner-managed businesses, those five numbers have never been extracted from the ledger in that form.

Nothing has been earned or spent differently. But operating profit — the figure in the facility letter — is almost 11 per cent lower.

What it looks like on the page

A distributor with a spare floor let out to a tenant, a term loan, some leased vehicles and money on deposit. Ordinary. Here is its income statement before and after, in thousands.

The cash flow statement, quietly rewired

Amendments to IAS 7 travel with IFRS 18 and must be adopted at the same time. Two of them affect almost everybody.

First, operating profit becomes the compulsory starting point for the indirect method. Most companies today begin at profit before tax or profit after tax, because IAS 1 never said which. That choice disappears.

Second, the freedom to classify interest and dividends where you like disappears too. Dividends paid go to financing. For an ordinary trading company, interest paid goes to financing, and interest and dividends received go to investing. Anyone who has compared two competitors' operating cash flow and wondered why one looked so much healthier will recognise why the board bothered.

One further small change with a long tail: goodwill must now be presented as its own line on the balance sheet.

"But we are not a listed company"

Scope depends on the reporting framework, not the size of the business.

• Full IFRS Accounting Standards — IFRS 18 applies. Listed or private, group or standalone, ten employees or ten thousand.
• IFRS for SMEs — IFRS 18 does not apply. But note the coincidence: the third edition of that standard is also effective from 1 January 2027. Different project, same deadline.
• IFRS 19 — the new reduced-disclosure standard for eligible subsidiaries of an IFRS parent, again effective 2027. It cuts disclosure. It does not touch presentation. The five categories and the two subtotals still apply in full.

That last point matters in the Gulf and in UK groups alike, where a large population of private companies and subsidiaries reports under full IFRS as a matter of law, lender requirement or group policy. Size buys no exemption here.

The comparative year is already half spent

IFRS 18 applies retrospectively. A company with a December year end reports under it for the first time in its 2027 accounts — and must restate 2026 as the comparative, together with a line-by-line reconciliation between what it originally published under IAS 1 and the restated presentation. If it publishes interim statements, the reconciliation is required there too.

So the operative date was never 1 January 2027. It was the first day of the comparative period. For most companies that day has already passed, and the year being restated is the one currently running through the ledger.

This is less alarming than it sounds. Restating a smaller company's income statement is largely a mapping exercise on data that already exists — provided someone does it while the detail is still at hand. It becomes considerably harder eighteen months later, working backwards from a signed trial balance and trying to remember what was in "other income".

Where it actually hurts

Not in the accounting. In the contracts and the plumbing.

• Bank covenants. Many facility agreements define their own terms or freeze the accounting framework. Many simply refer to operating profit or an EBITDA built from it, as shown in the audited accounts. Find out which yours does. The conversation with a lender is much easier before the number moves than after.
• Bonus schemes and earn-outs written around a subtotal that is about to be redefined. Deferred consideration on an acquisition three years ago may now be measured against a different figure than the parties had in mind.
• The chart of accounts. Category classification is a mapping problem, and the cheapest place to solve it is once, at account level, rather than every quarter in a spreadsheet that lives on one person's laptop.
• Leases. Interest on the lease liability is financing; depreciation of the right-of-use asset is operating. A single "lease cost" account will need splitting.
• Foreign exchange. Differences follow the item that gave rise to them, unless doing so would involve undue cost or effort, in which case they go to operating. A single catch-all FX account no longer answers the question.
• Tax. Generally unaffected, since total profit does not change — but check any local rule that keys off a specific subtotal rather than the bottom line.

Six things worth doing now

1. Fix the dates. Write down your first IFRS 18 reporting period and your comparative period. Everything else follows from those two dates, and half the confusion in the market comes from people planning against the wrong one.This month
2. Map the trial balance to the five categories. Take the current chart of accounts, add a category field, and force a decision on every account. The awkward ones — investment property, deposits, FX, leases, equity-accounted investments — are where the judgement is.Before the year end
3. Build the comparative as you go. Produce the restated presentation for the current year while the detail is live, not retrospectively. Keep the reconciliation working paper; it is a disclosure requirement, not a working note.Alongside the current year close
4. Read the loan agreements and the bonus scheme. Identify every contract that references operating profit or EBITDA. Establish whether the definition is frozen. Open the conversation early where it is not.Before the year end
5. Test yourself for MPMs. Collect every performance figure the business publishes outside the accounts — press releases, the website, investor material, the chairman's statement. If any is a subtotal of income and expenses reflecting management's view, it needs a note and a reconciliation. If none is, record that conclusion.Before the first IFRS 18 year
6. Rehearse the notes. Draft the expenses-by-nature note if you present by function, review every line labelled "other", and check that each caption says what the number actually is. A dry run on last year's figures costs a day and removes most of the risk.During the first IFRS 18 year

IFRS 18 will not deliver anyone a better profit. It offers a better explanation of the profit already earned — and for a business that has never had to articulate what its operating result actually consists of, that is worth more than it sounds. Companies that treat this as a mapping exercise will comply. Companies that treat it as a communications exercise will get something out of it.

Either way, the explanation has to be assembled from this year's ledger. And this year is already running.

This article is a general summary, current at the date of publication, and is not a substitute for reading the standard or for professional advice on a specific set of facts. IFRS 18 was issued in April 2024, adopted for use in the UK in December 2025 and endorsed in the EU in February 2026; application questions continue to be considered by the IFRS Interpretations Committee.