20% Off $9.99 — You Pay $7.99
20% of $9.99 is $2.00, so the price drops from $9.99 to $7.99. Below are the same figure with sales tax added, what happens if a second discount stacks on top, and the full tier table for this price so you can compare without retyping it.
The arithmetic, line by line
| Step | Calculation | Result |
|---|---|---|
| Discount rate as a decimal | 20 ÷ 100 | 0.20 |
| Discount amount | $9.99 × 0.20 | $2.00 |
| Final price | $9.99 − $2.00 | $7.99 |
| Price paid, share of original | $7.99 ÷ $9.99 × 100 | 80% |
This page is row 3 of the 10 discounts this site publishes for $9.99. Against the 10% row it returns $1.00 extra, and it still leaves $5.49 on the table before 75%, since a single percentage point on $9.99 is worth exactly $0.10 and the step from 15% to 20% added $0.50.
With sales tax on top
Tax is charged on the discounted amount, so the rate applies to $7.99 rather than $9.99.
| Tax rate | You pay | Tax portion |
|---|---|---|
| 5% | $8.39 | $0.40 |
| 6% | $8.47 | $0.48 |
| 7% | $8.55 | $0.56 |
| 8% | $8.63 | $0.64 |
| 9% | $8.71 | $0.72 |
| 10% | $8.79 | $0.80 |
If a second discount stacks
"Take an extra 20% off sale prices" is a second cut on the already-reduced price, not on the original. That is why the totals below do not add up to 30% or 40%.
| Second discount | Price after 20% | After the extra cut | Combined |
|---|---|---|---|
| Extra 10% off | $7.99 | $7.19 | 28% total |
| Extra 20% off | $7.99 | $6.39 | 36% total |
Every discount on $9.99
| Off | You pay | You save |
|---|---|---|
| 10% | $8.99 | $1.00 |
| 15% | $8.49 | $1.50 |
| 20% | $7.99 | $2.00 |
| 25% | $7.49 | $2.50 |
| 30% | $6.99 | $3.00 |
| 40% | $5.99 | $4.00 |
| 50% | $5.00 | $5.00 |
| 60% | $4.00 | $5.99 |
| 70% | $3.00 | $6.99 |
| 75% | $2.50 | $7.49 |
20% off nearby prices
| Original price | Final price | Savings |
|---|---|---|
| $4.99 | $3.99 | $1.00 |
| $14.99 | $11.99 | $3.00 |
| $19.99 | $15.99 | $4.00 |
| $24.99 | $19.99 | $5.00 |
Frequently asked
What is 20% off $9.99?
$7.99. The discount is 20% of $9.99, which is $2.00, and that comes straight off the price: $9.99 − $2.00 = $7.99.
How much do I save at 20% off $9.99?
$2.00 on a $9.99 item, which is the 20% that comes off before the till total of $7.99. The share you still pay is 80%, and sales tax is charged on that smaller figure rather than on the original.
Is 20% off plus another 20% off the same as 40% off?
No. Stacked percentages multiply, so 20% then 20% is 36% off in total, not 40%. On $9.99 the first cut leaves $7.99, and a second 20% takes it to $6.39.
Does sales tax apply before or after the discount?
After, in every US state that taxes the sale. Tax is charged on what you actually pay, so at 8% you owe $8.63 on a $7.99 subtotal, not 8% of $9.99. There are exceptions for manufacturer coupons and mail-in rebates, but a shelf discount is applied first.