Your supplier raised prices in March. How much margin have you lost since then?
For independent shops: every time your supplier updates their price list and you don't update your costs, your margin shrinks without you noticing it at the till.
A children's clothing shop in Bristol. Buys from a UK supplier, sells in-store. Calculated margin: 42%.
In March, the supplier updated their price list by 9%. The owner noticed, paid the higher invoices, but didn't update the margin calculation for each item.
Six months later, her real margin was 33%, not 42%. Nine percentage points. On monthly revenue of £18,000, that's £1,620 of margin disappearing every month — invisible until you look.
She found out when she uploaded invoices to Syntra and compared the updated purchase cost against selling price.
The three moments your margin changes without warning
1. Supplier updates their price list — usually once or twice a year, in an email buried in your inbox.
2. You switch supplier — the new one has different prices but you're using the same spreadsheet.
3. You negotiate volume discounts — the price changes but you don't update the product card.
In all three cases, your calculated margin stops being real.
How Syntra keeps retail margins accurate
Every supplier invoice you upload — from your clothing distributor, food wholesaler, accessories supplier — the AI extracts the unit price of each reference.
When you open the calculator and search for an item, the cost shown is from your latest invoice, not six months ago. The margin you see is real.
If the supplier raises prices and you upload the new invoice, in 30 seconds you know exactly which products need repricing.
🛍️ Syntra calculates your real margin per product from your invoices — free.
Try free for 7 days →Setup in 5 minutes