Inventory Write-Down: Three Statements Interview Walkthrough

"Inventory is written down by $10" is a high-frequency accounting technical and a strong cousin of the inventory purchase question. Write-downs hit earnings now. Paying cash for inventory earlier is a different story. Interviews use this drill to test non-cash charges, tax shields, and balance sheet plugs in one breath.

Assumptions

State the setup before you start linking:

• Inventory carrying value reduced by $10 (impairment / lower of cost or net realizable value style)
• No cash moves at the write-down moment
• Tax rate 20% unless told otherwise
• The write-down is tax deductible in the period (standard interview assumption; real life can differ)

If tax is 0% or 40%, recompute. Do not glue the 20% answer to every prompt.

The short answer

"At a 20% tax rate, a $10 inventory write-down lowers pre-tax income by 10 and net income by 8. On the cash flow statement I add back the non-cash charge, so CFO is up 2 from the tax shield. Inventory falls by 10, cash rises by 2, and equity falls by 8."

Walkthrough at 20% tax

NI -8
CFO = -8 + 10 = +2
Inventory -10; Cash +2; Equity -8

Why cash goes up

Same tax-shield logic as depreciation: a deductible loss reduces taxes paid, and the charge itself is non-cash. You did not collect $2 from customers. You paid $2 less in tax because taxable income fell. If the interviewer says "ignore taxes," cash is unchanged and equity and inventory both fall by 10.

Where the expense lives

Companies may park inventory write-downs in COGS or in a separate impairment / restructuring line. For three-statement linkage, the exact P&L label matters less than: it hits pre-tax income, it is non-cash, and inventory on the balance sheet falls. For EBITDA debates, ask whether the charge sits above or below the EBITDA line the firm uses in comps. In a screen, flag that a below-EBITDA "one-time" write-down can still be economically recurring if the company keeps mismanaging inventory.

Vs buying inventory for cash

Zero tax and 40% tax variants

Interviewers love to change the tax rate mid-answer.

0% tax: NI -10. Add back +10 → CFO 0. Inventory -10. Equity -10. Cash unchanged.

40% tax: NI -6. Add back +10 → CFO +4. Inventory -10. Cash +4. Equity -6.

Narrate the pattern: after-tax NI loss = write-down × (1 - t); cash benefit = write-down × t if deductible and non-cash.

Sell later at the new book value

Follow-up: you write down by 10, then sell the inventory for the new carrying amount with no further gain or loss. The sale then looks "normal" at the reduced basis. Gross profit on that unit is thinner forever versus original cost. That is the economic point of the write-down: you recognized the loss when value fell, not when cash finally came in.

If you sell above the written-down book, you may show a gain relative to the new basis. Do not invent a second write-down.

QoE and PE angle

In a PE process, inventory write-downs show up in quality of earnings. Questions:

1. Was this a true one-time clean-up or a recurring mismanagement pattern?
2. Did EBITDA addbacks remove the charge while the business still needs markdowns every year?
3. Is ending inventory still aggressive after the write-down?

Say you would diligence aging, SKU concentration, and subsequent markdown history before treating the charge as non-recurring.

Common traps

1. Treating the write-down as a cash inventory purchase
2. Forgetting the tax shield so cash is wrongly flat at 20% tax
3. Cutting inventory without cutting equity / NI
4. Adding the write-down to CFO without starting from reduced NI
5. Mixing LCM/NRV accounting nuance when the prompt only wants linkage

30-second verbal

"At 20% tax, a 10 inventory write-down lowers net income by 8. On the cash flow statement I add back the non-cash charge, so cash is up 2 from the tax shield. Inventory is down 10 and equity is down 8. That is different from buying inventory with cash, which is a WC use with no immediate earnings hit."

Related

Inventory Increase, Depreciation Increase, EBITDA Addbacks.

Practice on SheetRank

On Project Catalyst, drill the write-down at 0%, 20%, and 40% tax until the plugs are automatic. Then contrast it with a cash inventory build.