The Adjustment Ledger: A UK Analyst's Discipline for Testing Non-GAAP Earnings

UK results statements have become an exercise in reading two sets of numbers. The statutory figures sit in the primary statements; the adjusted figures sit in the narrative, the highlights page and often the first slide of the results presentation. For analysts covering FTSE 350 and AIM companies, the alternative performance measure (APM) is now part of the ordinary language of reporting. The risk is not that adjustments exist. The risk is that they enter a valuation model without a clear audit trail.

Financial Reporting Council and ESMA guidance has long emphasised that APMs should be defined, reconciled and explained. In practice, disclosure quality varies. Some companies provide a clean bridge from IFRS operating profit to adjusted operating profit, with each item described and quantified. Others offer a short table, a broad label such as 'underlying' and a rationale that would not survive a determined challenge. During 2026, as reporting cycles continue to test analyst patience, a structured routine is more useful than a general scepticism.

Anchor the analysis in statutory figures

Begin with the IFRS numbers: revenue, operating profit, profit before tax, and cash generated from operations. Read the reconciliation note before reading the APM commentary. Check the arithmetic, the treatment of tax and minority interests, and whether the adjustment is applied consistently across periods. A reconciliation that does not add up is not a minor presentational issue; it is a control signal.

The statutory anchor matters because it establishes the starting point for every subsequent judgement. If adjusted operating profit is stated as £120m against an IFRS operating profit of £80m, the analyst needs to see the £40m bridge item by item. If the bridge is described only as 'items management considers non-recurring', the disclosure is insufficient for modelling purposes.

Construct an adjustment ledger

A useful discipline is to maintain an adjustment ledger for each company. The ledger should record the period, the APM label used, the statutory starting point, each adjustment item, the amount, management's rationale, whether the item is cash or non-cash, whether it is recurring, and the source page in the annual report or results announcement. Every adjustment receives a row. The ledger becomes both a working paper and a challenge document.

The ledger prevents a common failure: treating an adjustment as a single line in a spreadsheet without recording why it was accepted. Months later, when the investment committee asks why earnings were normalised by £15m, the analyst can point to the evidence rather than reconstruct the reasoning from memory.

Challenge repeat 'one-offs'

Repeat items deserve particular scrutiny. Restructuring costs, acquisition-related expenses, impairment charges, litigation provisions and share-based payment charges often appear across several consecutive years. An item that appears in three or more annual reports is difficult to describe as genuinely non-recurring. It may be a recurring cost of the business model, a persistent feature of the sector, or a sign that the company has not completed the restructuring it announced.

A practical test is to compare the adjusted measure with cash flow. If adjusted operating profit rises while cash generated from operations lags, the adjustment may be excluding real cash costs. For UK analysts, the cash flow statement is the necessary counterweight to a persuasive adjustment narrative.

Compare disclosure quality across peers

Disclosure quality can be assessed systematically. A simple scorecard might cover the clarity of the reconciliation, the specificity of each rationale, the consistency of definitions across periods, segment-level detail, and the presence of a cash conversion bridge. Comparing peers on these criteria produces a relative picture: which companies treat APMs as an explanatory tool, and which use them as a presentation device.

Poor disclosure is not only a modelling inconvenience. It is a governance flag. Where an APM is central to management remuneration, the quality of the reconciliation becomes more important, not less. Analysts should read the remuneration report alongside the APM note to see whether the adjusted measure used for incentives is the same one presented to investors.

Document before it reaches the model

Before an adjustment enters a valuation model, it should be recorded in an adjustment memo. The memo should identify the source, the date, the reviewer and the decision. It should distinguish between adjustments accepted for modelling, adjustments accepted only for comparability, and adjustments rejected. A sensitivity analysis is useful: what happens to earnings per share, EV/EBITDA and free cash flow if the adjustment is disallowed? The answer often sharpens the investment case.

This documentation discipline also supports investment committee papers. A clear adjustment ledger allows the analyst to explain the difference between reported and normalised earnings without relying on assertion. It makes the valuation more defensible and the recommendation easier to challenge.

A practical checklist

• Reconcile every APM to the nearest IFRS measure and check the arithmetic.
• Record each adjustment in a ledger with source, rationale and recurrence flag.
• Treat items appearing in three consecutive years as recurring unless proven otherwise.
• Test adjusted profit against cash generated from operations.
• Compare reconciliation quality across the peer group using a consistent scorecard.
• Read the remuneration report for the APM used in incentive targets.
• Document accepted and rejected adjustments before they enter the model.
• Run a sensitivity case in which all adjustments are disallowed.

The purpose of this routine is not to reject adjusted earnings outright. Many adjustments are informative, particularly where a genuine one-off event distorts comparability. The purpose is to make the analyst's judgement explicit, evidenced and repeatable. In UK financial reporting, where APMs remain a permanent feature of the landscape, that discipline is the difference between using management's numbers and being used by them.