How Much Are You Really Saving? The Truth About "Stacked" Discounts

Sales are full of numbers that sound bigger than they actually are. "Extra 20% off" on top of an already-discounted item is the most common one — and it doesn't mean what most people assume it means.

You can check any single discount instantly with our discount calculator, but the part worth understanding is what happens when discounts stack.

Why 20% + 10% isn't 30%

Say something costs 1000. A 20% discount brings it down to 800. Now apply an extra 10% off — but that 10% applies to 800, not the original 1000. That's a further 80 off, bringing the final price to 720.

If the discounts had actually added up to 30%, the price would be 700. Instead, it's 720 — a small but real difference, and it always works this way whenever discounts are applied one after another instead of combined first.

The rule to remember

Each discount applies to the price left over after the previous one, not to the original price. The more discounts stacked, the bigger this gap grows between what it "sounds like" you're saving and what you're actually saving.

How to check any deal quickly

Run the first discount through a calculator, then take that result and run the second discount on it. Two quick calculations tell you the real final price, instead of trusting the sale sign's math.

Next time you see a stacked discount, plug the numbers into the discount calculator one step at a time — it takes a few seconds and tells you exactly what you're paying, not what the sign implies.