Trusted Choice Guide
Tools / Real discount checker (Black Friday)

Part of the topic: 🐷 Saving, loans & retirement

Real discount checker

Shops like to compare with an old list price. What matters is the lowest price of the last weeks. Enter three prices and see how much you really save.

βœ“ Free Β· βœ“ no sign-up Β· βœ“ no cookies Β· βœ“ runs in your browser

Find the 30-day low with a price tracker (e.g. browser extensions or price-history charts on comparison sites).

Real discount vs. 30-day low
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In the EU, shops must state a price reduction against the lowest price of the previous 30 days (Price Indication Directive). In the US there is no such rule – compare price histories yourself. This tool only calculates; it does not check prices.

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πŸ”’ Runs entirely in your browser – nothing you enter is uploaded or stored.

How to use it

  1. Enter today's sale price.
  2. Enter the crossed-out price shown by the shop.
  3. Enter the lowest price of the last 30 days from a price tracker – and read the real discount.
Your inputs live only in the link, not on our server.

Last checked: October 2026 Β· Based on: German Price Indication Ordinance (PAngV) Β§ 11 – lowest price of the previous 30 days; CJEU judgment of 26 Sept 2024, C-330/23 (Aldi SΓΌd). Found a mistake? Use the form below – we fix confirmed errors and update the date.

Frequently asked questions

How do I know if a Black Friday deal is real?

Compare the sale price with the lowest price of the last 30 days, not with the crossed-out list price. Many 'deals' are only a few percent below the recent low.

When is Black Friday 2026?

Friday, 27 November 2026; Cyber Monday is 30 November 2026.

What is a good discount?

A real discount of 15 % or more against the 30-day low is usually a genuine bargain; below 5 % you can often wait.

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