11.11 Discount Stacking: What Floor Price Protects Your Margin?

Set a floor price for every product before you opt in to an 11.11 campaign, and treat all of it as one deduction from your selling price: the seller voucher, your share of the platform voucher, seller-funded coins or cashback, your free shipping programme contribution, commission and payment fees, and the advertising cost per order. If that combined figure takes the product below your floor, exclude the product from the campaign rather than hoping volume covers it. The reason sellers get hurt on 11.11 is almost never one bad discount. It is four reasonable-looking discounts arriving on the same order, each approved by a different person on a different day.

What actually happens when four discounts stack on one order?

Each discount is set up in a different place. The seller voucher sits in your own seller centre. The platform-wide voucher is agreed when you tick the box to join the campaign, and part of it is usually funded by you. Coins, cashback and flash-deal participation are separate opt-ins again. Free shipping has its own contribution rate. None of these screens shows you the other three.

The buyer sees a single price at checkout. You see the gap three weeks later, when the platform statement lands and the payout per order is lower than anything you modelled. By then the stock has shipped and the discount is not recoverable.

What is your real cost per order, not your advertised discount?

Work it in dollars on one real product. Take an item you sell at S$49.90, costing S$18.00 to buy, with S$2.00 of packing and last-mile top-up.

A moderate stack: a 15 per cent seller voucher takes S$7.49. Your share of the platform voucher takes about S$2.50. Seller-funded coins take S$1.00. Free shipping contribution takes S$1.50. Commission and payment fees at around 7 per cent take S$3.49. Advertising at S$6.00 per order. After goods and packing, you keep roughly S$7.90, or about 16 per cent of the price. Thin, but it works.

Now the version that usually happens on the day. The voucher goes to 25 per cent because a competitor moved, and the ad cost per order rises to S$12.00 because everyone is bidding on the same keywords in the same 48 hours. Same product, same platform: you are now about S$3.00 down on every unit sold. Sell 400 units and the campaign costs you S$1,200 plus the stock.

These are illustrative figures, not yours. Pull your own commission, transaction fee and shipping contribution rates from your last platform statement, and check one detail that changes the answer: whether commission is charged on the price before or after vouchers. The difference is real money at 25 per cent off.

How do you set a floor price you can defend at 1am?

A floor price is the lowest net amount you will accept per unit after everything above, written down before the campaign starts. Build it in this order: cost of goods, packing and fulfilment, platform commission and payment fees, a returns and failed-delivery allowance of a few per cent, and the contribution you actually need from the product. Whatever is left is the maximum discount, and that number goes next to the product in a simple sheet.

The point of writing it down is the moment at 1am on 11 November when sales are slower than expected and someone wants to deepen the voucher. With a floor price, that is a thirty-second check. Without one, it is a guess made by a tired person, and the guess is usually generous.

Give one named person the authority to change a floor price during the campaign, and require that any change is recorded. Two people editing vouchers in the same seller centre is how a 25 per cent discount quietly becomes 40 per cent.

What should you check in your ad spend before 11.11, not after?

Customer acquisition cost is the figure that moves most during a peak campaign, and it moves against you. Everyone is buying the same impressions at the same time.

Before sign-up, calculate your current cost per order per channel from the last 30 days, then ask what happens to each product at two and three times that cost. Products that only work at today's ad cost are not campaign products. Set daily caps rather than campaign caps, because a runaway bid on a single morning can spend a week's budget before anyone opens the dashboard. Separate your campaigns by product group so you can switch off the losing group without taking down the winners.

Which products should you deliberately exclude?

Not everything belongs in a peak campaign. Exclude bulky or heavy items where the shipping contribution eats the margin. Exclude anything with a high return rate, because a returned discounted item costs you the discount, the inbound freight and the handling. Exclude products with thin margin that you also sell steadily at full price, because the campaign mostly moves full-price demand into a discounted window.

Keep in the campaign the products that genuinely acquire a customer who buys again, and the overstock you want cleared before year-end closing. Both are defensible reasons to sell near cost. Volume for its own sake is not.

What should be decided this week?

With 11.11 four weeks out, three decisions are still fully in your hands. First, confirm the campaign sign-up deadline and what you are committing to when you tick the box, including your funded share of each voucher type. Second, produce the floor price list for every product you intend to promote, and name the one person who may change it. Third, set the ad budget caps and the point at which you stop a losing product group rather than defend it.

Done this week, these are decisions. Done on 11 November, they are reactions, and reactions are what the stacking exploits.

Frequently asked questions

Is it ever right to sell below cost on 11.11?
Yes, with a limit and a reason: clearing stock you would otherwise write down, or a first purchase that reliably leads to a repeat order. Cap the quantity, record the expected loss before the campaign, and check the repeat-purchase claim against your own data from last year rather than assuming it.

How do I find out how much of a platform voucher I am funding?
It is stated in the campaign terms at sign-up and itemised in your settlement statement. Open last year's 11.11 statement and identify each deduction line before you join this year's campaign. If a line is unclear, ask your account manager in writing and keep the reply.

Do I need new software to manage floor prices?
No. A spreadsheet with product, cost, fees, floor price and maximum discount is enough for most Singapore SMEs, and it is easier to check under pressure than a tool nobody has used before. Automate only once you are running the same calculation across several platforms every month.