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Inventory Management · 6 min read · Updated Sep 8, 2026
What Is an Inventory Adjustment? Types, Process and Examples
An inventory adjustment is the correction of your system’s recorded stock quantity or value so it matches what is physically on hand, made after a mismatch is found through a stock count, damage, theft, or a valuation change. Left uncorrected, that gap quietly distorts cost of goods sold and every reorder decision built on it.
This guide covers the three types of inventory adjustment, the exact steps to make one correctly, and why a monthly count that always finds a mismatch is a process problem, not a counting problem.
What Is an Inventory Adjustment?
An inventory adjustment corrects the quantity or value of stock recorded in your system so it reflects the actual physical inventory. Adjustments are normal, they happen because of damage, theft, expiry, counting errors, or a change in how an item is valued.
What matters is not that an adjustment happens, it is how large and how frequent the adjustments are. A single small correction after a physical count is routine. A recurring, sizeable gap between system and physical stock is a signal that something upstream, receiving, issuing, or data entry, is broken.
Adjustments feed directly into financial reporting. Because cost of goods sold is calculated from opening inventory plus purchases minus closing inventory, an inaccurate closing stock figure understates or overstates profitability for that period.
Manual Adjustment vs Software-Driven Reconciliation
Detection: manual adjustment usually surfaces a mismatch only at the next scheduled count
Audit trail: a spreadsheet correction is easy to overwrite with no record of who changed what
Duplicate or missed entries: manual logs are prone to the same stock movement being recorded twice, or not at all, when multiple people update the same sheet.
Speed of correction: fixing system stock in software takes minutes once the count is done
Effect on COGS accuracy: software-driven adjustments update cost of goods sold calculations immediately
See the Full Comparison Below
Aspect
Manual (Excel / Register)
Software-Driven (TranZact)
How a mismatch is found
At the next scheduled physical count
Flagged as stock moves, closer to real time
Time to correct system stock
Hours, across multiple sheets
Minutes, one adjustment entry
Audit trail
Easy to overwrite, no reliable history
Timestamped, tied to who made the change
Risk of duplicate or missed entries
High, especially with multiple updaters
Low, single system of record
Who can see the correction
Whoever has the sheet open
Anyone with access, in real time
Effect on COGS accuracy
Lags a full accounting period behind
Reflected immediately in reporting
How to Make an Inventory Adjustment, Step by Step
A correct adjustment follows the same four steps whether you catch the gap through a scheduled count or a system flag:
Confirm the physical count. Recount the affected SKU at least once before adjusting anything, a single miscount is the most common cause of an unnecessary adjustment.
Identify the cause. Damage, theft, expiry, a receiving error, or a valuation change each point to a different fix, adjusting the number without knowing the cause just hides the real problem.
Post the adjustment entry. Record the corrected quantity or value against the actual cost, not an average or purchase price, so the adjustment reflects reality.
Log it with a reason and an owner. Every adjustment should carry a reason code and the name of who approved it, that record is what makes the next audit fast instead of painful.
The Three Types of Inventory Adjustment
Nearly every adjustment falls into one of three categories:
Decreasing quantity. Used when physical stock is less than what the system shows, typically from damage, theft, expiry, or a miscount at receiving.
Increasing quantity. Used when physical stock is more than the system shows, often from an unrecorded return, a receiving entry that was missed, or a duplicate issue that was never actually consumed.
Re-evaluation. Quantity stays the same but the recorded value is corrected, common when raw material cost changes or an item was entered at the wrong rate.
Seasonal demand adjustment. A common real-world trigger: stock built up ahead of a seasonal peak needs its cost of goods sold recalculated once the season closes.
Duplicate or missing entries. The most frequent cause in Indian SME manufacturing: the same goods receipt or issue gets logged twice, or not at all, when stock movements are tracked across separate registers.
Tired of a monthly stock count that always finds the same kind of gap?
TranZact logs every stock movement with a timestamp and an owner, from receipt to issue to adjustment, so when a count finds a mismatch, you can actually trace where it came from instead of just correcting the number again.
See where your stock gaps are coming from →
How TranZact Helps With Inventory Adjustments
TranZact tracks warehouse-wise stock in real time, so a variance shows up close to when it actually happens instead of waiting for the next physical count. Every correction is logged with a reason and a timestamp, which is what our stock reconciliation guide walks through in more depth. It also ties adjustments back to the original goods receipt, so a receiving error gets caught at the source, not three months later.
None of this requires a separate adjustment module. It just means stock movements are logged as they happen instead of reconstructed from memory at count time.
FAQs
What happens if inventory adjustments are done incorrectly?
Incorrect adjustments distort your recorded cost of goods sold and can trigger unnecessary stockouts or excess ordering, since every reorder decision downstream is built on the corrected number being right.
How often should inventory be adjusted?
Spot checks through the year plus a mandatory year-end physical verification is the minimum. Businesses with frequent mismatches usually need more frequent counts on the specific SKUs causing the gap, not a blanket increase in counting.
Can inventory adjustments be automated?
The correction itself still needs a human to confirm the physical count, but the detection, logging and audit trail can be automated by inventory software that tracks stock movements as they happen.
Should an adjustment use purchase price or actual cost?
Actual cost, wherever it can be determined. Using purchase price for an item with a different landed cost, freight, duty, handling, understates the true value of the adjustment.
Do inventory adjustments affect profit?
Yes. Because cost of goods sold is calculated from opening inventory plus purchases minus closing inventory, any adjustment to closing stock changes reported profitability for that period.
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