Complete Guide to Retail Discounts, Markdowns & Double Coupons
Navigating promotional sales, seasonal clearances, and stacked promotional codes is essential for smart consumers and retail store managers. Understanding how percentages compound ensures you calculate exact checkout totals without unexpected surprises.
How Stacked (Double) Discounts Work
Retail stores often advertise an extra percentage off already discounted clearance merchandise (e.g., "Take an extra 20% off 50% clearance"). It is important to remember that discounts are applied sequentially:
Step 1 (First Discount): Price 1 = Original Price ร [ 1 - (Discount 1 รท 100) ]
Step 2 (Stacked Coupon): Price 2 = Price 1 ร [ 1 - (Discount 2 รท 100) ]
Total Effective Savings = 1 - [ (1 - D1) ร (1 - D2) ]
Reference Table: Common Discount Percentage Savings
| Discount Percentage | Original $50 Item | Original $100 Item | Original $200 Item |
|---|---|---|---|
| 10% Off | $45.00 (Save $5) | $90.00 (Save $10) | $180.00 (Save $20) |
| 20% Off | $40.00 (Save $10) | $80.00 (Save $20) | $160.00 (Save $40) |
| 30% Off | $35.00 (Save $15) | $70.00 (Save $30) | $140.00 (Save $60) |
| 50% Off (Half Price) | $25.00 (Save $25) | $50.00 (Save $50) | $100.00 (Save $100) |
| 70% Off (Deep Clearance) | $15.00 (Save $35) | $30.00 (Save $70) | $60.00 (Save $140) |
Frequently Asked Questions (FAQ)
Does 50% off plus 50% off mean the item is free?
No. The second 50% discount applies to the remaining half of the price. The total savings is 75% off the original retail price, not 100%.
How does buying in bulk affect unit discount?
Increasing the quantity multiplies both your total cost and your aggregate savings proportionally while keeping the unit price constant.