Was that the market, or your vendor?
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Enter what you paid for an item on each invoice — with the date. Vendor Benchmark reads the wholesale market’s move over your exact window and sets it beside yours, so a price jump stops being a mystery: you see whether the market moved, or your vendor did. It runs on your device and keeps your prices there.
Check an item
Your prices — kept here: 0 · sent anywhere: 0
Add two or more dated invoices for the same item. The more dates you give it, the sharper the read against the market — and it updates as you type.
How Vendor Benchmark reads it.
It puts a date on every price. Each purchase carries the invoice date, so the tool compares a real window — your second-week-of-May delivery against last week’s — not a vague “before and after.”
It reads the market over your window. For a matched item, it pulls the wholesale reference on your first date and your last date from the live Cost Index and measures the market’s move over the exact same span. Your move minus the market’s move is the part that’s on your vendor.
It stays honest about wholesale. The Cost Index is a wholesale reference; a delivered price runs higher, so the tool leads with the rate of change, never “you should pay $X.” When the market history behind an item is thin, it says so and withholds the verdict rather than accusing a vendor on noise.
Freight rides in that gap — and freight moves with diesel. The space between a wholesale reference and a delivered price is partly the road: fuel, mileage, drops. The reference is pre-freight, so a diesel-driven freight increase lands in the “on your vendor” slice even though it isn’t margin — so when diesel is climbing (the Cost Index tracks the free weekly EIA reading as an index-wide backdrop), read a wide gap with that in mind. Context only: never a figure subtracted from your gap, and never a nudge to the verdict.
It uses your own baseline, too. Alongside the market read, it flags a hike against the trailing median of what you’ve paid — the same rule Muntin Ledger uses, so the two never disagree.
It stays on your device. Your dated prices are kept in this browser — the tool never sends them anywhere on its own. A shareable link carries the prices you typed, but only if you choose to make and send one. Peer comparison against other operators is a separate, opt-in feature inside Ledger — never built from what you type here.
Why this tool exists.
Every check this tool runs maps to a specific concept in the Library. Two starting points — one definition, one playbook.
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