20% Off $4.99 — You Pay $3.99
20% of $4.99 is $1.00, so the price drops from $4.99 to $3.99. 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 | $4.99 × 0.20 | $1.00 |
| Final price | $4.99 − $1.00 | $3.99 |
| Price paid, share of original | $3.99 ÷ $4.99 × 100 | 80% |
At $0.05 per percentage point, the 5-point move up to 25% changes the saving by $0.25 on a single unit. Two units bought at 20% save $2.00 between them, which is $0.75 more than one unit at 25% ($1.25) — quantity and discount rate are separate levers and they do not trade evenly.
With sales tax on top
Tax is charged on the discounted amount, so the rate applies to $3.99 rather than $4.99.
| Tax rate | You pay | Tax portion |
|---|---|---|
| 5% | $4.19 | $0.20 |
| 6% | $4.23 | $0.24 |
| 7% | $4.27 | $0.28 |
| 8% | $4.31 | $0.32 |
| 9% | $4.35 | $0.36 |
| 10% | $4.39 | $0.40 |
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 | $3.99 | $3.59 | 28% total |
| Extra 20% off | $3.99 | $3.19 | 36% total |
Every discount on $4.99
| Off | You pay | You save |
|---|---|---|
| 10% | $4.49 | $0.50 |
| 15% | $4.24 | $0.75 |
| 20% | $3.99 | $1.00 |
| 25% | $3.74 | $1.25 |
| 30% | $3.49 | $1.50 |
| 40% | $2.99 | $2.00 |
| 50% | $2.50 | $2.50 |
| 60% | $2.00 | $2.99 |
| 70% | $1.50 | $3.49 |
| 75% | $1.25 | $3.74 |
20% off nearby prices
| Original price | Final price | Savings |
|---|---|---|
| $9.99 | $7.99 | $2.00 |
| $14.99 | $11.99 | $3.00 |
| $19.99 | $15.99 | $4.00 |
Frequently asked
What is 20% off $4.99?
$3.99. The discount is 20% of $4.99, which is $1.00, and that comes straight off the price: $4.99 − $1.00 = $3.99.
How much do I save at 20% off $4.99?
$1.00 on a $4.99 item, which is the 20% that comes off before the till total of $3.99. 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 $4.99 the first cut leaves $3.99, and a second 20% takes it to $3.19.
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 $4.31 on a $3.99 subtotal, not 8% of $4.99. There are exceptions for manufacturer coupons and mail-in rebates, but a shelf discount is applied first.