Your supplier changed prices. See which SKUs are quietly killing your margin.
Upload your old and new supplier price lists. MarginSift matches SKUs, calculates the cost change and gross margin impact, and flags every product that fell below your target margin.
CSV and XLSX. Processed in your browser — no account, no upload to a database.
Example output
| SKU | Cost Δ | New margin |
|---|---|---|
| SKU-1001 | +30.4% | 21.8% |
| SKU-1004 | +36.2% | 24.8% |
| SKU-1012 | +16.7% | 23.4% |
| SKU-1009 | -4.3% | 37.6% |
Illustrative figures from the built-in sample data. Annualized dollar impact is only shown when you supply annual volume — MarginSift never estimates it for you.
The 20-second walkthrough
Last quarter's supplier costs, exactly as your rep sent them.
The updated file with revised supplier costs.
Cost deltas, old vs. new gross margin, below-target flags, suggested reference prices, and a downloadable action CSV.
How it works
Upload
Drop in your old and new supplier lists (.csv or .xlsx). Add a separate retail price file if selling prices live elsewhere.
Map
Preview each file and point MarginSift at your SKU, product name, cost, and selling price columns. No naming conventions required.
Review
Set your target gross margin, scan the dashboard, filter the exceptions, and export a ready-to-share action report.
Why not just do it in Excel?
You can. The problem is that it is rebuilt from scratch every time a supplier sends a new file.
Every supplier formats their list differently. Map columns once per run instead of re-writing VLOOKUPs.
Old and new gross margin, cost delta, percentage change, and the price required to hold your target margin — calculated the same way every time.
Duplicate SKUs, blank costs, non-numeric values, and missing selling prices are surfaced as “Needs review” instead of silently producing a wrong number.
One CSV your purchasing and sales side can act on, with calculated columns clearly labeled.
Launch pricing
Pay once per analysis. No subscription. No account to create.
Single Analysis
Exactly 1 real-file analysis run.
- Two-file comparison
- Column mapping
- Margin dashboard
- Action CSV export
Secure payment by Stripe
3 Analysis Pack
Exactly 3 real-file analysis runs.
- Two-file comparison
- Column mapping
- Margin dashboard
- Action CSV export
Secure payment by Stripe
Want to see the output first? Run the built-in sample data in the analyzer for free — no payment required.
Frequently asked questions
Run your last price update through it
Two files in, margin decisions out. Sample data is built in if you'd rather not use a real supplier file yet.
Analyze my price lists