Why only the change in the provision affects profit

Ask a student to adjust the provision for doubtful debts and a familiar thing happens. They take the full provision figure and charge all of it against this year’s profit, every year.

They treat it as a fresh expense like rent or wages. It seems reasonable, because the provision does reduce profit.

But only a slice of it reaches the income statement: the part by which the provision has changed since last year. The rest has already done its work, and charging it again is a mistake.

Where the misunderstanding begins

The provision for doubtful debts is unusual. Most expenses, such as rent, wages and insurance, are used up within the year, charged in full, and start again from nothing next year. The provision does not behave that way.

It is a standing estimate that carries forward from year to year, sitting against receivables until the business decides to change it. Because it looks like an expense and reduces profit like one, students assume the whole of it is charged afresh each year. That one assumption causes nearly all the confusion.

A running balance, not an annual charge

The provision lives in two places. On the statement of financial position it is a balance: a total amount held back against the risk that some receivables will not be collected. That balance persists.

If it stood at RM1,800 at the end of last year, it opens this year at RM1,800. Nobody empties it and rebuilds it.

The income statement deals only with the events of one year. So the real question each year is not how large the provision is, but how far it has moved.

Why charging the whole balance counts the loss twice

Suppose the provision was RM1,800 last year and the business now judges RM2,100 to be right. The RM1,800 was already charged against last year’s profit.

It was recognised and reduced last year’s figures. If we charged the full RM2,100 again this year, the original RM1,800 would be counted a second time, hitting profit twice for one unchanged expectation.

The accounts would report a loss already recognised as if it were new. Only the extra caution, the RM300 by which the estimate has grown, belongs to this year.

The reservoir that reports only its change in level

Think of a reservoir. The provision balance is the water level.

The income statement records only the water added or drained this year, never the whole reservoir again. Top the level up and you have poured something in, which is a charge against profit.

Let it fall and you have released something, which is a gain written back. Reporting the whole volume every year would be absurd, because it was reported when first filled. Only the difference is recorded.

When the provision grows, the increase is charged

Suppose receivables have risen, or trading has become riskier, and the provision needs to climb from RM1,800 to RM2,100. The business sets aside RM300 more.

That RM300 is an additional expected loss recognised this year. It is charged to the income statement as an expense and reduces this year’s profit by exactly that amount. The balance rises to RM2,100, still deducted from receivables, but profit felt only the RM300 of fresh caution.

When the provision shrinks, the fall is credited back

The opposite case surprises students more. If receivables fall, or collection improves, the provision might need to drop from RM2,100 to RM1,700. The business was more cautious than events required, so it releases the surplus RM400.

That release is not an expense. It is written back as a gain, credited to the income statement, and it increases profit. Nothing was earned.

The business is undoing caution that turned out to be unnecessary. Again only the RM400 movement appears in the income statement, while the balance settles at its new, lower level.

The first year that fools everyone

One year seems to prove the misconception right: the very first. When a provision is created from nothing, last year’s balance was zero, so the change and the whole provision are the same figure. All of it is charged, because all of it is new caution. A student who meets the topic through that opening year reasonably concludes that the whole provision is always charged.

The rule was never different. A movement measured from zero equals the total. From the second year on, with a balance already standing, the gap between the two is plain.

The concept doing the work

The matching concept is behind this. Each period should carry the costs belonging to it and no others.

The caution recognised in an earlier year belonged to that year and was set against its profit. It should not be dragged forward to burden a later one.

Charging only the movement obeys this. Each year’s income statement takes exactly the change in expected loss that year brought.

It takes no more, because the past is already accounted for. It takes no less, because fresh caution must be recognised as it arises.

Two figures, two homes

The provision produces two numbers that belong in separate statements. The full balance lives on the statement of financial position, deducted from receivables so the net figure shows what the business realistically expects to collect. The movement, the increase charged or the decrease written back, lives in the income statement as this year’s profit effect.

Putting the whole balance into the income statement is the mistake. Keeping each figure in its own home keeps reported profit honest.

If your child keeps charging the whole provision figure, one of our teachers can take them through a full worked adjustment. It covers the increase charged, the decrease written back and the balance carried forward, and checks their entries against a question. Book a trial class

Syllabus reference: Cambridge 0452 and 0985, syllabus for 2027 to 2029, sub-topic 4.4 Irrecoverable debts and allowance for irrecoverable debts (page 15).