Stock adjustments: what they are and when to use them

Inventory numbers do not always match physical stock. You expect 50 units and count 48. Or the system says 20 and you find 22 on the shelf.

That is where a stock adjustment comes in.

What is a stock adjustment?

A stock adjustment is a controlled change to the quantity recorded for a product. System shows 50, physical count shows 48, adjustment is minus two.

The goal is not just to change a number. It is to bring records in line with reality while keeping a record of why the change happened.

Why do discrepancies happen?

• Counting mistakes
• Receiving errors — 100 recorded when 98 arrived
• Damaged products never removed from available stock
• Transfers between locations that were never recorded
• Returns that were not processed correctly
• Data-entry mistakes
• Theft or loss

A discrepancy does not automatically mean theft. Investigate before you conclude.

When should you make an adjustment?

After a stock take, damaged goods, lost products, data-entry errors, corrections or any other confirmed difference. The reason should always be recorded.

An example

The system shows 100 units of Product A. A physical count finds 96. You investigate and discover four units were damaged and never recorded.

You adjust from 100 to 96 with the reason "damaged stock discovered during stock count". The inventory now reflects reality, and there is an explanation attached to the change.

Do not use adjustments to hide problems

If a delivery was entered incorrectly, fix it through receiving. If stock moved between locations, record the transfer. If a sale was missed, investigate the sale.

Adjustments work best when the cause has been identified, or when a physical count confirms a difference that must be corrected.

Keep a history

A useful adjustment record includes:

• Product and SKU
• Location
• Previous quantity and new quantity
• Difference
• Reason
• Date and the person who made it

That is exactly what StockSimple stores. Every adjustment is written into the stock movement history with the location, the reason and the user, and stock cannot be edited around that history.

Adjustments across multiple locations

Location matters. If Shop A shows 40 and Shop B shows 25, and you count 37 at Shop A, the adjustment belongs to Shop A — not to the business-wide total. StockSimple applies every adjustment at a specific location and updates the company total from there.

Adjustments tell you something

If you keep adjusting the same products, ask why. Perhaps receiving needs tightening. Perhaps staff are not recording transfers. Perhaps counts are not done consistently.

Final thoughts

An adjustment is a useful tool, not a replacement for good process. Correct confirmed differences, record the reason and look for patterns.

The best inventory system is not the one with the fewest adjustments. It is the one where adjustments help you understand why your inventory changed.