Supplier price-list audit

Every change.
Every error.

Caught before it costs you.

Old and new lists in. One clean Excel report out: every price move, new and removed item, duplicate, unit change and data error — with the € impact.

Deterministic Excel in · Excel out 1–2 day turnaround
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Built by an ERP data-integrity developer

When a supplier sends a new price list, the changes hide across thousands of rows.

A silent 12% increase. A changed unit. A duplicate. A new or discontinued item. Miss one and it quietly eats your margin.

What you get

One workbook that shows exactly what changed

Price increases & decreases

With the € and % impact per item, sorted biggest first — so you see the moves that matter before they reach your margin.

New & removed items

What the supplier quietly added, and what disappeared from the list — each in its own tab, never buried in the noise.

Duplicates & unit changes

The same ID twice, or a unit/packaging swap that silently breaks your costing — both flagged with the old and new value.

Data errors

Blank, zero, negative or non-numeric prices and missing IDs — caught here instead of in your ERP, billing and sell prices.

Summary sheet

Total € impact, the biggest movers and every count on one page — the whole audit at a glance before you open a single tab.

Ambiguity flagged, never guessed

Anything genuinely unclear — like an ambiguous number format — comes with the exact question to send the supplier, not a silent assumption.

How it works

Two files in. One clean report back.

1

Send two files

Your previous and new price list, as Excel or CSV. Just tell me which columns hold the item number, price and unit — messy headers are fine.

2

Deterministic comparison

Python compares every row. No AI, no guesswork: the same two files always produce the same report, every run.

3

One clean Excel report

Every change and error in a styled workbook with a Summary sheet — back in your inbox in 1–2 business days.

Why Proculytics

The specialist, not one freelancer among many

The edge is deterministic tooling that handles real-world files most scripts choke on — backed by four years building ERP data integrity.

  • Deterministic, not guesswork

    Plain, reproducible code. The same files give the same result every time — nothing is skipped and nothing is invented.

  • Messy real-world files welcome

    Any column names, European and US number formats, currency symbols, thousands separators, CSV and Excel mixed together.

  • Native German, DIN-coded SKUs

    Built for DACH suppliers — fluent in German, DIN article numbers and a shared timezone, not one foreign freelancer in a queue.

  • Four years of ERP data integrity

    Catching exactly these errors before they reach billing and sell prices is the job I've done for four years.

Is 1.500 fifteen hundred, or one-point-five?

When the data can't settle a number format on its own, it isn't guessed. The report flags the column with the exact question to send your supplier — and shows the assumed reading meanwhile, so your comparison is still complete.

Sample report

A real deliverable, not a promise

The exact exception report a client receives — illustrative data from a fictional German industrial-supplies wholesaler.

3,418line items
44exceptions flagged
€13.19net impact / unit
1 dayturnaround
See the full sample report Order yours on Fiverr

Pricing

Flat prices. No surprises.

All paid work runs through Fiverr, which handles payment, invoicing and buyer protection.

Basic

$195

Old-vs-new comparison, up to ~500 items. Clean Excel report of every change, plus the Summary sheet.

  • Every price change with € & %
  • New, removed, duplicate & unit checks
  • Summary sheet + 1 revision
Select on Fiverr

Standard

$395

Up to ~2,000 items, or an invoice-vs-contract overcharge check. Full exception report + impact summary.

  • Everything in Basic, larger files
  • Optional overcharge check vs contract
  • 2 revisions
Select on Fiverr

Premium

$795

5,000+ items or multiple files. Full report with recommendations and priority turnaround.

  • Everything in Standard, at scale
  • Recommendations + priority delivery
  • 3 revisions
Select on Fiverr

Prices are held flat — a free sample on a small, anonymised slice of your own files comes first, so you see the result before you pay.

FAQ

Questions, answered

What do I need to send you?

Your previous price list and the new one, as Excel or CSV. Just tell me which columns hold the item number, price and unit. If you have agreed or contract prices, send those too and I'll also check for overcharges.

What if I only have the new list, not the old one?

That's fine. With one file I run anomaly checks instead: duplicates, unit inconsistencies, blank or invalid prices, and other data errors. The full old-vs-new change report needs both files, so send the previous version if you can find it.

My file is a PDF. Can you still do it?

Excel or CSV is best, and the PDF is usually just a printout of a file you already have, so check for that first. If the data only exists as a PDF, I can extract the table for an added fee, since it's extra work.

How accurate is it? Could it miss something?

The comparison runs on deterministic code, not guesswork, so the same files always produce the same result and nothing is skipped. Anything genuinely ambiguous, like an unclear number format, is flagged for you to confirm rather than silently assumed.

Can you handle European number formats and messy columns?

Yes. Comma and dot decimals, thousands separators, currency symbols, any column names, and CSV and Excel mixed together. Messy real-world files are the norm, not a problem.

Is my data safe?

For the free sample I work on a small, anonymised slice of your files, delete them afterward and store nothing. The paid audit is handled the same way — your data is used only to produce your report.

Send me your two files. I'll tell you exactly what changed.

Typical turnaround 1–2 business days. A free sample on a slice of your own data comes first — see the result before you pay.

Order on Fiverr