Treadstone Associates
Case File · Quality of Earnings

An inventory method changed in the diligence year

Anonymised, illustrative composite. Nothing was missing from the warehouse and nothing was mispriced. Closing inventory was defensible on the old basis and on the new one. The distortion existed only because the two bases met in the middle of a single year.

Treadstone Associates · Updated 2026

At a glance

  • • Ontario, share purchase of a metal-fabrication business offered at 5.5× a reported EBITDA of $2,190,000.
  • • Revenue rose 3.8% to $19,100,000 while gross margin rose from 31.2% to 33.6% — 240 basis points, or $458,400 on the year's revenue.
  • • In the same year the company began absorbing a share of production overhead into the cost of finished goods and work in progress. The uplift in closing inventory was $458,000.
  • • Income Tax Act s.10(2) freezes opening inventory at the prior year's closing value, so the entire uplift lands in one year's cost of sales and does not repeat. s.10(2.1) requires the Minister's concurrence to change method, which had not been sought.

The situation

The target laser-cut, formed and welded steel assemblies for agricultural and mining equipment makers. Order book solid, two long-standing customers, a plant that had been re-equipped four years earlier. On the face of it the story was a business quietly getting better: revenue up, and margin up considerably more than revenue.

The problem

The buyer's accountant tested the margin improvement by product line, expecting to find it concentrated in the programmes the vendor had named. See testing gross margin by product or service line. It was not concentrated anywhere. It was spread evenly across every line, every customer and every month of the year — including the programmes whose prices had not moved.

A margin improvement that lands uniformly on unrelated products is not an operating improvement. It is a change in how cost is measured. The note on inventory accounting had been amended in the current year's statements: production overhead, previously charged to cost of sales as incurred, was now absorbed into the cost of finished goods and work in progress on a machine-hour basis.

The important thing about that change is what it is not. Nothing was double-counted. Nothing was missing from the count — that is a different problem, and the file for it is inventory counted twice across two warehouses. Closing inventory was correctly stated on the new basis and would have been correctly stated on the old one. The distortion existed entirely because the year began on one basis and ended on the other.

The numbers

Revenue $18,400,000 then $19,100,000. Gross margin 31.2% then 33.6%. Applying the prior year's margin to the current year's revenue gives gross profit of $5,959,200 against the $6,417,600 reported — a difference of $458,400.

Closing inventory went from $2,240,000 to $2,918,000. Of that $678,000 increase, the company's own workings attributed $458,000 to the overhead absorbed under the new basis and $220,000 to genuine volume. The margin improvement and the inventory uplift are the same number. All of the improvement was the method.

The confirming ratio was days in inventory, which moved from 65 to 84 in a year when revenue grew 3.8%. Inventory grew far faster than sales, and it grew in dollars rather than in units — the physical count at both year ends was within four per cent on a tonnage basis.

At 5.5×, $458,000 of EBITDA is $2,519,000 of price. Restated EBITDA on a consistent basis was $1,732,000, which prices at $9,526,000 against the $12,045,000 asked.

The rule that decided it

Income Tax Act s.10(1) sets the basic measure: “property described in an inventory shall be valued at the end of the year at the cost at which the taxpayer acquired the property or its fair market value at the end of the year, whichever is lower, or in a prescribed manner”.

Section 10(2), marginal note Continuation of valuation, is what makes the distortion one-directional and temporary: “the inventory at the commencement of the year shall be valued at the same amount as the amount at which it was valued at the end of the preceding taxation year for the purpose of computing income for that preceding year”. Opening inventory is frozen at last year's closing figure. It cannot be restated onto the new basis.

That single sentence is the whole mechanic. Cost of sales is opening inventory plus production, less closing inventory. Raise closing without being permitted to raise opening, and cost of sales falls by exactly the uplift — once. The following year opens at the new, higher figure, and the benefit does not recur. A buyer paying a multiple of the improved margin is capitalising a one-year timing difference in perpetuity.

Section 10(2.1) is where a common misstatement creeps in, so it is worth quoting in full. Where inventory is valued at the end of a year by a permitted method, that “method shall, subject to subsection 10(6), be used in the valuation of property described in the inventory at the end of the following taxation year for the purpose of computing the taxpayer’s income from the business unless the taxpayer, with the concurrence of the Minister and on any terms and conditions that are specified by the Minister, adopts another method permitted under this section”.

Read what that governs. It is a year-to-year consistency requirement, with a gate on changing method: the Minister's concurrence. It is not a rule requiring the tax valuation to match the financial statements, and it is regularly cited as though it were. The company had adopted a different method without seeking concurrence, which is an exposure on the return quite apart from the pricing question. And s.10(3), marginal note Incorrect valuation, gives the Minister a further lever: where the opening inventory has not been valued as s.10(1) requires, “the inventory at the commencement of that year shall, if the Minister so directs, be deemed to have been valued as required by that subsection”.

The outcome

Neither side argued about which basis was better. Absorbing production overhead into inventory cost is a perfectly ordinary treatment and may well have been the more faithful one. The buyer's position was narrower and harder to answer: a change in measurement is not performance, and a business cannot be sold a second time on the year it changed how it measured.

Three years were restated on each basis consistently. On the old basis margin ran 31.1%, 31.2%, 31.3%. On the new basis, applied to all three years, it ran 33.4%, 33.5%, 33.6%. Either way the trend is flat. The price settled at 5.5× $1,732,000, or $9,526,000, and the agreement added a representation that no accounting policy or method of valuation had been changed in the three years before closing except as disclosed — which is what would have surfaced this in an hour rather than in three weeks.

What it would have cost otherwise

$2,519,000 of purchase price for a timing difference. And the second year would have been worse than neutral: with opening inventory now at the higher figure, the buyer's first full year would show margin reverting to roughly 31%, which against a plan built on 33.6% reads as a $458,000 miss in year one of ownership — the classic month-two miss, except that it was arithmetically certain before the deal signed.

The tell

Margin improvement that is uniform across unrelated products, customers and months. Real operating improvements are lumpy — they show up where the change was made. A uniform improvement is almost always a change in measurement, and inventory is the usual place it lives.

Takeaways

  • • A change in inventory valuation method moves one year's cost of sales and then stops. s.10(2) freezes opening inventory at the prior closing value, so the entire uplift lands once and does not recur.
  • • Capitalising that year at a multiple pays in perpetuity for a difference that reverses in the next period's comparatives.
  • • s.10(2.1) is a year-to-year consistency rule requiring the Minister's concurrence to change method. It is not a requirement that the tax valuation match the financial statements — a misstatement worth correcting wherever it appears.
  • • s.10(3) lets the Minister direct that opening inventory be deemed valued as s.10(1) requires, so a change made without concurrence is an exposure a share buyer inherits.
  • • Test margin improvement by product line and by month. If it is uniform, it is measurement, not performance.

Sources

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