price-increase sheet

Test a Supplier Price Rise Against Its Own Index — Free

Paste old and new prices with the input index your supplier cites, and read which increases track the index and which do not.

The proof surface

The relevant question is not whether costs rose, it is whether they rose by the index the supplier printed. The matrix answers that per product line.

Inputthe supplier's own price letter beside the index movement it cites

Rare devicenormalises every price rise against the input index the supplier names, so 'costs went up' becomes a comparable number per line

Output artifacta variance matrix that shows index movement against actual increase per line

Cost$0 · local-first · one free run · samples labelled

Sample, not your facts: Sample: carton 12-pack from $8.40 to $9.92, resin index +6.2%, pallet wrap $22.00 to $25.30, annual spend $40,000 — four concrete points across four types.

Why the flat version breaks

The letter's own framing

Supplier letters quote the largest index in their cost base, which is rarely the input that dominates your product line.

Blended increases

Averaging across a basket hides the lines where a rise is double the index, and those are precisely where money is recoverable.

Accepting 'market conditions'

An increase with no index attached cannot be checked at all, so it should be answered with a request for the index rather than a counter-offer.

How to work the price-increase sheet

List the lines

Both prices and the index the supplier cites for that line.

Set spend and tolerance

Spend prices the variance; tolerance decides when a line becomes a query.

Read the variance

Each row shows index movement beside the actual increase, with over-indexed lines carrying the heavier rule.

Query by line

Ask for the index basis on the two worst lines before accepting the schedule.

What the sheet replaces

Question	Before	On the sheet
Is the rise justified	read the letter and accept it	index movement against actual increase
What it costs	annualise roughly	variance priced against your own spend
What to query	'seems steep'	the lines past your tolerance, named

Lines with no index cited are marked separately: an unindexed rise is a different conversation from an over-indexed one.

Run it on the samples, right here

FIRST-LOAD

Data note: Everything runs in this browser tab on the price-increase sheet: your supplier price lines and index notes stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.

Go deeper: the companion app files the same reading as a scored comparison matrix

The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the ready-to-mail packet, and holds your drafts on this device — one free run, then $ 9 one-time for the layer that keeps filing.

The sheet and the variance per line are free. The paid layer keeps four supplier letters and prints the negotiation sheet.

Open the price-increase index sheet companion

Boundary

This price-increase sheet works only on the supplier price lines and index statements you paste you paste. It does not verify an index figure with a publisher, does not form a supply agreement, and does not negotiate on your behalf. The figures describe what you supplied, not what is true in the world. Confirm anything you plan to act on with your buyer or the supplier's account manager in writing before you rely on it.

What this is built on

Every figure comes from the supplier price lines and index statements you paste you paste; nothing is looked up, scraped or asserted as verified.
Method: variance = actual percentage increase − index percentage cited on the same line, priced against your annual spend
Sample values are labelled samples — illustrative by design, not your data and not a quotation of any organisation's policy.

Before: the reader accepted the annual letter. After: they can see resin index up 6.2% while the price on their line rose 18%.