The formula
Purchasing saving = Annual purchasing spend x Volume discount %
Admin saving = Suppliers removed x Admin cost per supplier per month x 12
Total consolidation saving = Purchasing saving + Admin saving
Why there are two savings, not one: the discount is the visible prize, negotiated at the contract table. The admin saving is the quiet one, and for groups with a long tail of small suppliers it can be half the money. Every active supplier costs deliveries to receive, invoices to process and prices to audit, whether they sell you $200,000 a year or $200. Consolidation works because concentration is what suppliers pay for: one customer ordering the whole group’s chicken is worth a better price than twelve locations ordering separately, because the volume is guaranteed.
How to use it, with an example
- Pull your real supplier count from the purchase ledger, including local suppliers only one site uses. That tail is where consolidation starts.
- Set the after-count realistically: core suppliers per category, plus a named backup for anything that can close a kitchen.
- Enter the discount you can get in writing at the new volume, not the opening number in a sales meeting.
- Add an honest monthly cost per supplier relationship. If your team spends hours a week on deliveries and invoices, it is not zero.
Worked example: A restaurant group spends $1,450,000 a year on purchasing across 26 suppliers, and plans to consolidate to 9, at a 6% volume discount, with each supplier relationship costing about $175 a month in deliveries and admin. The purchasing saving is $1,450,000 x 6% = $87,000, the 17 removed suppliers save $35,700 of admin, and the total is $122,700 a year, 8.5% of spend. The calculator above is prefilled with these same numbers, so you can see a finished result before you enter your own.
Consolidation only sticks if every location actually buys through the consolidated list, which means the approved suppliers, prices and products have to live where the ordering happens. With Odoo for Restaurants, a group orders from one approved supplier list at every site, and the Odoo Purchase module holds the contracts, price agreements and vendor performance in the same system as the inventory those orders feed.
Common mistakes
- Consolidating to a single supplier for everything. The discount is tempting and the risk is real: one failure, one quality slide, one price rise with no alternative. The standard pattern is a primary and a backup per critical category. Compare normal prices per unit first with the restaurant supplier price comparison approach before you commit volume.
- Believing the headline discount. Discounts are usually quoted on a basket, then quietly exclude your highest-volume lines, or come with minimum orders and delivery fees that eat them. Test the rate against your real top products and your real order pattern.
- Forgetting the local suppliers your chefs love. Some tail suppliers exist because a product genuinely is better or genuinely local, and guests notice. Consolidate the commodity tail first, and bring chefs into the quality checks before you move a signature ingredient.
- Counting admin savings your team will never feel. If the same person still receives deliveries and processes invoices in the same hours, the saving is theoretical. It becomes real when delivery days drop and invoice volume falls, which is why restaurant inventory management tips on pars and order discipline multiply the effect.
- Letting locations keep ordering off-list. Every off-contract order leaks the volume that earned the discount, until the discount itself is at risk. The saving survives only if the consolidated list is the easiest way to order, a theme that runs through how to reduce restaurant food cost at group scale as well as single-site scale.
FAQs
How much can supplier consolidation realistically save?
On purchasing itself, 5 to 10% on product costs is the commonly reported range for consolidated volume, with total procurement savings in structured programmes sometimes reaching higher once admin is counted, as in this calculator’s 8.5% example. Treat anything above 10% on a whole basket as a claim to verify product by product, not a plan.
How many suppliers should a restaurant group keep?
Enough to cover your categories with a primary and a backup on critical lines, and no more. For many groups that lands in the high single digits to low teens, down from the 20 to 40 that grow organically as locations add their own favourites.
Is the admin cost per supplier real money?
Yes, it is just scattered: delivery receiving time, invoice processing, price checking, payment runs, and the management attention each relationship consumes. Procurement research regularly puts the fully loaded cost of one supplier relationship in the hundreds per year even before order errors. This calculator lets you enter your own figure, or zero if you only want the purchasing number.
What is the risk of consolidating suppliers?
Concentration. A single supplier failure hits every location at once, and a supplier who knows you have no alternative negotiates differently at renewal. Keep backups warm with occasional orders, keep contracts time-limited, and keep your spend data portable so switching stays possible.
Should we use a group purchasing organization instead?
A GPO is consolidation by proxy: you rent someone else’s combined volume. It suits smaller groups whose own spend is too thin to move a supplier, and the maths is the same as this calculator with the GPO’s discount and fees in place of your own numbers.
