Supplier Invoices & Cost Review Practical guide
Maintain a Price Change Log That Explains the Numbers
Track product, unit, source, and effective date
The short answer
A price log lets a manager distinguish a real market change from a pack-size revision, contract update, seasonal item, or data-entry mistake. The useful record includes the old and new price, effective date, source, volume, and comparison unit.
How to approach it
Update the log from accepted quotes and invoices rather than memory. Record whether the change was approved and whether a rebate or temporary discount later changed the net cost.
- Record SKU, old and new unit price, and effective date
- Link each entry to the quote or invoice
- Note approval and temporary discounts
Could this affect your business?
- Can you trace this charge to an approved order, accepted terms, and a delivery or service record?
- Would your review catch the same bill, a changed pack size, or a fee that appeared this month?
- Can a second reviewer reproduce the comparison from the original documents?
Where BizScoper fits
Keep the source record close to the decision
Money Leak Detector is being developed to surface possible duplicate charges, price changes, and invoice variances for human review. A flag is a question to investigate, not proof of an overcharge.
What this guide cannot determine
This article is general educational information, not legal, tax, accounting, or compliance advice. Rules and contract rights depend on the facts and jurisdiction. Confirm the applicable requirements with the issuing authority or a qualified professional.
Sources and further reading
BizScoper is in development
Know what was ordered. Know what was billed. Join the BizScoper early-access list.
Join the early-access list for occasional product updates. No launch date is set.