Supplier price control: how to catch silent price increases

A 3% increase on a secondary item often goes unnoticed. Repeated across dozens of items over a year, it can shift food cost by one or two percentage points without anyone catching it in real time. Price control is not an admin task: it is a direct defence of margin.

Comparing price lists systematically

Comparing means having, for every critical item, the history of invoiced prices over recent months, not just the last price paid. A single isolated figure doesn't tell you whether cost is rising, falling or stable: you need the time series, even if it's just a sheet with twelve columns per item.

How to spot silent increases

• Compare unit price per standard measure (kg, litre), not price per pack: a smaller pack at the same price is a disguised increase
• Check the net weight stated on the invoice, not just the product name: shrinkflation cuts content while keeping the price unchanged
• Log the date of every price change, not just the value: increases close together in time are often more significant than a single isolated jump
• Periodically review low-movement items: they get the least attention and are most prone to increases going unnoticed

How to negotiate with suppliers

Effective negotiation starts from data, not a generic complaint. Presenting the supplier with purchase volume history and price trends makes the request concrete and verifiable. A specific point ("on this item the price rose 12% in six months, against a stable purchase volume") carries more weight than a generic discount request.

1. Prepare the data before the meeting: volumes, order frequency, price history
2. Ask for the reason behind the increase and check it against the raw material's actual market trend
3. Consider trade-offs other than a discount: more frequent deliveries, payment terms, lower minimum order quantities
4. Put every agreed price arrangement in writing, even informal ones, to avoid later invoice discrepancies

A backup supplier for critical items

For items that weigh most on food cost or that have no easy menu substitute, relying on a single supplier exposes you to two risks: price increases with no benchmark, and supply disruptions with no safety net. Qualifying a second supplier, even if not used regularly, keeps a real reference point and an exit route if problems arise.

Well-structured price control does not eliminate increases, which often reflect real market dynamics: it does allow you to tell a justified increase apart from a silent one, and to negotiate or switch suppliers before the impact on food cost becomes significant.