Sale periods are both an opportunity (clearance, new customer acquisition) and a minefield (regulator compliance, desynchronized Google Shopping feeds, poorly managed successive markdowns). This guide gives you the method to prepare, execute and close a sale period without errors — on Shopify or PrestaShop.
The preparation calendar: W-6 to W-0
W-6: stock audit and selection
W-3: reference price calculation
W-1: markdown configuration
The Omnibus rules for sale periods
- Omnibus directive — the strikethrough price equals the lowest price in the 30 days preceding the first markdown.
- Successive markdowns — each new markdown uses the same reference price as the first (not the price of the previous week).
- Below-cost selling authorized — only during official sale periods (France), on products acquired at least 1 month before the sales start.
- Mandatory disclosure — both the discount rate and the reference (crossed-out) price must be clearly displayed on each discounted product.
Prepare your sales on these platforms
What Seegea changes for sale periods
| Sale period step | Without the right tool | With Seegea |
|---|---|---|
| Select products to discount | CSV export + Excel sort (2h) | Stock/margin filter in grid (10 min) |
| Calculate Omnibus reference price | History to search manually | 365-day history available in 1 click |
| Apply first markdown on 500 products | 3 to 4 hours of manual entry | 2 minutes (rule + push) |
| Schedule successive markdowns | Calendar reminders + manual entry | Automatic with configured dates |
| Return to full price after sales | Often forgotten, corrected after the fact | Automatic at end date |
Sale periods and Google Shopping: the desync trap
During sales, your prices change fast. The Google Shopping feed must follow within the hour — otherwise your ads show prices different from your site, Merchant Center suspends listings, and your Google Ads budget is wasted.
Seegea pushes each modification directly to Shopify or PrestaShop. Google Shopping sync then depends on your Merchant Center configuration (refresh frequency). For sale periods, configure hourly refresh as a minimum.
Built in France, for e-commerce teams managing official sale periods
French official sale periods have specific legal requirements. Seegea was designed with these constraints in mind — between Annecy and Chantilly — by a team that prepared their own sales before building this tool. Human support available during sale periods, response within 24 hours.
Prepare your next sale period with Seegea
30 min Google Meet · we audit your catalog