The problem: bad debts that arrive without warning
Picture this. Your management accounts show trade receivables of £250,000 sitting proudly on the balance sheet, and everything looks healthy. Then, three months later, a customer who owed you £15,000 goes into administration, and you write the whole amount off in one go. Your bank manager asks why the accounts did not flag this coming. Your finance director asks why nobody provided for it earlier. This is exactly the situation that expected credit loss accounting is designed to address. While IFRS 9 requires an expected credit loss model and default FRS 102 uses an incurred loss model, both frameworks aim to prevent the overstatement of receivables so your balance sheet reflects what you are actually likely to collect, not just what customers owe you on paper. For SME owners and finance teams, getting this right matters because it affects your reported profit, your balance sheet strength, and how lenders and investors view the reliability of your cash collection.
What IFRS 9 and FRS 102 actually require, without the jargon
Strip away the technical language and the idea is simple: some of the money owed to you will never be paid, and you need to recognise that reality in your accounts before it happens, not after. Under IFRS 9, this is called the expected credit loss model. Under the simplified approach for trade receivables without a significant financing component, you do not wait for a customer to default; you estimate lifetime expected losses from the moment of initial recognition based on historical experience, current conditions, and reasonable, supportable forward-looking information. This applies from day one, which for most trade debtors means as soon as you raise the invoice.
FRS 102, used by most UK SMEs, takes a different default route. Under Section 11, it follows an incurred loss model, meaning you recognise an impairment only when there is objective evidence that a loss event has occurred, such as a customer falling into significant financial difficulty, breaching payment terms, or entering insolvency proceedings. Crucially, under default FRS 102, general provisions against current, performing debt are not permitted. However, FRS 102 paragraph 11.2 offers an explicit accounting policy choice to apply the recognition and measurement provisions of IFRS 9 instead. The key conceptual distinction is that IFRS 9 requires you to look forward and estimate expected losses across all balances before they crystallise, while default FRS 102 waits for objective evidence that an incurred loss has occurred.
How to calculate expected credit losses using a provision matrix
The most practical, widely used method for trade receivables under IFRS 9 is the provision matrix, an ageing-based approach permitted as a practical expedient. You group your receivables by how overdue they are, apply a loss rate to each group based on your historical collection experience adjusted for current and forward-looking data, and add up the result. This avoids the need to assess every single invoice individually, which would be impractical for most SMEs with dozens or hundreds of customer balances.
Let us work through a real example. Riverside Joinery Ltd, a mid-sized manufacturer, has total trade receivables of £250,000 at its year end. The finance manager reviews three years of payment history and groups the outstanding invoices into four ageing buckets, applying a loss rate to each based on how often invoices in that bucket historically failed to be collected.
| Ageing bucket | Gross receivables (£) | Expected loss rate | Expected credit loss (£) |
|---|---|---|---|
| Current, 0 to 30 days | 150,000 | 0.5% | 750 |
| 31 to 60 days overdue | 60,000 | 2.0% | 1,200 |
| 61 to 90 days overdue | 25,000 | 8.0% | 2,000 |
| Over 90 days overdue | 15,000 | 30.0% | 4,500 |
| Total | 250,000 | – | 8,450 |
This matrix tells Riverside Joinery that, under IFRS 9, it should expect to lose around £8,450 of the £250,000 currently owed to it. That calculation is grounded in three years of actual write-off data adjusted for the current mix of customers and forward-looking information, such as an anticipated downturn in the construction sector where many of its customers operate.
Turning the calculation into the correct accounting entry
Once you know the required closing provision, the next step is comparing it with what is already sitting on the balance sheet from the prior period. Riverside Joinery had an opening loss allowance of £6,000 brought forward from last year. The movement needed to bring the provision up to the newly calculated £8,450 is what gets charged, or credited, to the profit and loss account this year.
| Required closing loss allowance (expected credit loss) | £8,450 |
| Opening loss allowance brought forward | £6,000 |
| Additional charge required in the period | £2,450 |
That £2,450 is the amount that needs to move through the income statement this year to top up the provision. If the calculation had produced a lower figure than the opening balance, the movement would be a credit, releasing some of the previously recognised provision back into profit. This is exactly how a provision should behave: it flexes up and down each period as the underlying risk in your receivables book changes.
| Account | Dr | Cr |
|---|---|---|
| Bad debt expense / expected credit loss charge (P&L) | £2,450 | |
| Loss allowance for trade receivables (Balance sheet, contra-asset) | £2,450 |
Records the increase in the expected credit loss provision for the year, based on the ageing-based provision matrix. The loss allowance reduces the carrying value of trade receivables shown on the balance sheet, so the net receivables figure presented to readers of the accounts is £241,550 (£250,000 gross less £8,450 provision).
A helpful way to think about the loss allowance account is as a running estimate, not a one-off write-off. You are not saying any particular customer will definitely default; you are saying that, statistically, a certain slice of your total receivables book will not be collected, and you are reflecting that reality now rather than later.
Do not confuse the loss allowance with an actual bad debt write-off. When a specific invoice is genuinely irrecoverable, for example a customer has gone into liquidation and you are certain none of the £15,000 owed will be recovered, you write off that specific debt against the provision, reducing both the gross receivable and the loss allowance. If you write off debts directly to the profit and loss account without going through the provision, you risk double counting the expense, once when the provision was raised and again when the specific debt is written off, which distorts your reported profit.
What this means differently for FRS 102 users
If your business reports under FRS 102 rather than IFRS 9, the distinction between the two frameworks is critical. Under default FRS 102 Section 11, impairment requires objective evidence of an incurred loss event, such as significant financial difficulty, breach of contract, or prolonged payment default. While overdue debt buckets (such as balances 30, 60, or 90 days past due) can be assessed collectively based on historical loss experience as evidence of impairment, booking a provision against current, non-overdue invoices (£750 in the example above) or anticipating future macroeconomic downturns is not permitted under the incurred loss model. However, an FRS 102 preparer can formally elect under paragraph 11.2 to apply the recognition and measurement requirements of IFRS 9. Under that accounting policy election, the full forward-looking provision matrix calculated above is entirely valid and compliant under UK GAAP.
For finance managers preparing consolidated group accounts where some subsidiaries report under FRS 102 and the parent reports under IFRS, this distinction matters at consolidation. If the subsidiary applies default Section 11 of FRS 102, the group must adjust the incurred loss provision to an IFRS 9 expected credit loss basis upon consolidation. Alternatively, the FRS 102 subsidiary can elect the IFRS 9 recognition and measurement option directly in its own statutory financial statements under paragraph 11.2, aligning policies across the group and removing the need for consolidation adjustments.
Actionable takeaways
- Build a provision matrix using your own historical write-off data, split into distinct ageing buckets, and update loss rates regularly so they reflect current collection experience and realistic forward-looking risks.
- Keep the loss allowance separate from actual bad debt write-offs in your ledger; the provision is an estimated valuation adjustment, while a write-off derecognises a specific, confirmed irrecoverable customer balance.
- Review and adjust the provision every reporting period, not just at year end, so management accounts throughout the year reflect realistic collectable receivables rather than an inflated gross figure.
- If your group mixes IFRS and FRS 102 entities, consider electing the IFRS 9 recognition and measurement option under FRS 102 paragraph 11.2 at subsidiary level to align accounting policies and simplify year-end consolidation.
Need help getting your receivables provisioning right?
Whether you are moving to IFRS 9 expected credit losses for the first time or tightening up your FRS 102 provisioning approach, getting the method and the journal entries right protects your reported profit and gives you a clearer picture of real collectable cash. Talk to us about building a provision matrix that fits your business.
