Does the order of discounts matter?

For pure percentages, the order **doesn't change** the math (it works out the same). But when you mix percentages with fixed amounts (like "20%" and "−$50"), the order matters: - Fixed first, then percent: price drops by $50, then 20% off the smaller amount. - Percent first, then fixed: 20% off the full price, then subtract $50. For the customer, it's **better when the percent goes first**. Stores usually have their order spelled out in the promo terms.

What's the difference between "in order" and "all at once" mode?

**In order (sequential)**: each discount applies to the price after the previous one. This is the standard at most stores. Example: $100, −20%, −10% → $80 → $72. **All at once (simultaneous)**: sum all percentages and apply them in one go. Example: $100, −20% + −10% = −30% → $70. The difference is small for two discounts but grows with more discounts or higher prices. "All at once" gives a **lower price**, which is better for the customer.

What's the "effective discount"?

That's the **single percentage** that's equivalent to all your stacked discounts. Calculated as: how much you saved, divided by the list price, times 100. Example: list $200, you paid $144, savings $56, effective = 56 / 200 = 28%. Useful for comparing different coupon combinations: which one gives a bigger total discount.

Can I apply a coupon before the store sale?

Stores have different rules. Some apply store promos first, then coupons. Others go the other way. Check the terms or ask customer service. In this calculator you can **reorder discounts with the arrows** and see exactly how the order changes the final price. Sometimes it's a few dollars, sometimes a lot more.

Is 100% off the same as free?

Yes, but the calculator stops at $0 and won't go negative. If your stacked percentages add up to over 100%, or if a fixed amount is bigger than the price, the final stays at $0. Stores won't actually pay you to shop, no matter how many coupons you stack. The rare exception is system glitches that occasionally hit deal-tracker sites.

Does the calculator include sales tax?

No, it works **on the price you enter** (pre-tax or after-tax, whichever you put in). If you have an after-tax price (with sales tax), the result includes tax. If you want to discount the pre-tax price first and add tax after, use our [sales tax calculator](/en/sales-tax-calculator) on the final number.

How do I calculate "buy one get one half off" (BOGO)?

BOGO isn't a normal flat discount, it's 50% off only one item. Trick: if both items are the same price, add them together and apply a **25% discount** (half-off-half = 25% off the total). If the items differ and the cheaper one is the "half-off" item, calculate manually: cheaper × 0.5 + full price of the more expensive one.

Discount stacking calculator - free

List price

Each discount applies to the price after the previous one. Standard at most stores.

Discounts and coupons

720.00$

Final price

280.00$

Total saved

28.00%

Effective discount

Step by step

Step	Discount	Price before	Off	Price after
1	−20%	1,000.00	−200.00	800.00
2	−10%	800.00	−80.00	720.00

Difference between modes

"In order" gives 720.00 $, "all at once" gives 700.00 $. A difference of 20.00 $. The "all at once" mode is more customer-friendly.

What's my real price after stacking discounts and coupons?

Shopping and seeing "20% off + 10% coupon + extra $50 off"? Hard to do that math in your head. Enter the price and add discounts one by one, the calculator shows the final price, how much you saved and what it adds up to as a single discount.

Important detail: most stores apply discounts one after another, not all at once. So "20% + 10%" isn't 30% off, it's 28%. This calculator shows that gap and lets you switch between both modes to compare.

You can reorder discounts with the arrows. Some stores have rules like "percent coupons apply before fixed-amount coupons", and the order changes your final price.

How to use it

Enter the list price (before any discounts).

Pick a calculation mode: "in order" (each discount applies to the price after the last one) or "all at once" (percentages summed together).

Add percent discounts (e.g. 20% off) and fixed-amount discounts (e.g. $50 off).

You can label each discount (e.g. "Black Friday", "NEWSLETTER code") to keep track of what's what.

Use the arrows to reorder discounts. Some stores have a fixed order, and it changes the final price.

When this is useful

Common situations:

Online shopping with a store sale + promo code + cashback. Check exactly how much you'll pay.
Black Friday, holiday sales. "Buy one get one 50% off", "extra 20% coupon", "free shipping code". Easy to total it up.
Loyalty card + sale. The store says "discounts stack", but how? See both scenarios side by side.
Negotiating bigger purchases. Is "10% off plus $200 rebate" better than "15% off"? Quick check.
Running a store / e-commerce. If you're the one giving discounts, see how deep your final price goes when you combine promos.

If you need to add tax on top, use our sales tax calculator. For markup or margin numbers, see the margin and markup calculator.

Questions and answers

No. Stores almost always apply discounts one at a time. After 20% off, the price drops to 80% of the original. Then the 10% coupon applies to that 80%, taking off 8% (not 10%). Total: 28% off, not 30%. The more discounts you stack, the bigger the gap between simple addition and the real result.

Step

Discount

Price before

Off

Price after

−20%

1,000.00

−200.00

800.00

−10%

800.00

−80.00

720.00

What's my real price after stacking discounts and coupons?

You can reorder discounts with the arrows. Some stores have rules like "percent coupons apply before fixed-amount coupons", and the order changes your final price.

How to use it

Enter the list price (before any discounts).

Pick a calculation mode: "in order" (each discount applies to the price after the last one) or "all at once" (percentages summed together).

Add percent discounts (e.g. 20% off) and fixed-amount discounts (e.g. $50 off).

You can label each discount (e.g. "Black Friday", "NEWSLETTER code") to keep track of what's what.

Use the arrows to reorder discounts. Some stores have a fixed order, and it changes the final price.

When this is useful

Common situations:

Online shopping with a store sale + promo code + cashback. Check exactly how much you'll pay.
Black Friday, holiday sales. "Buy one get one 50% off", "extra 20% coupon", "free shipping code". Easy to total it up.
Loyalty card + sale. The store says "discounts stack", but how? See both scenarios side by side.
Negotiating bigger purchases. Is "10% off plus $200 rebate" better than "15% off"? Quick check.
Running a store / e-commerce. If you're the one giving discounts, see how deep your final price goes when you combine promos.

If you need to add tax on top, use our sales tax calculator. For markup or margin numbers, see the margin and markup calculator.

Questions and answers

Discount stacking calculator

What's my real price after stacking discounts and coupons?

How to use it

When this is useful

Questions and answers

Related tools

Percentage calculator

Sales tax calculator

Margin and markup calculator

Discount stacking calculator

What's my real price after stacking discounts and coupons?

How to use it

When this is useful

Questions and answers

Related tools

Percentage calculator

Sales tax calculator

Margin and markup calculator