Percent Off Calculator Estimate sale prices, stack coupons, add tax, and plan savings — with 2025 retail math and trap av...

Percent Off Calculator

Estimate sale prices, stack coupons, add tax, and plan savings — with 2025 retail math and trap avoidance.

Single Discount

Stacked Discounts

With Tax

Savings Planner

Original Price ($)

Percent Off (%)

Coupon ($)

Original Price ($)

First Discount (%)

Second Discount (%)

Price ($)

Tax Rate (%)

Tax Timing Discount before tax (most common) Discount after tax (rare)

Target Price ($)

Weekly Savings ($)

Months Goal

$0.00

Sale Price

$0.00

Total Savings

$0.00

Final with Tax

0.0%

Effective Discount

Discount Impact

Discount Math Explained

Single Discount**:

$$ \text{Sale Price} = \text{Original} \times (1 - \frac{\%}{100}) - \text{Coupon} $$

Stacked Discounts** (compound):

$$ \text{Final} = \text{Original} \times (1 - \frac{d_1}{100}) \times (1 - \frac{d_2}{100}) $$

Example** ($129.99, 20% + 10% off): • After 20%: $103.99 • After 10%: $93.59 • Total discount = ($129.99 − $93.59) / $129.99 = **28.0%** (not 30%)

✅ Pro Tip**: Coupons apply *after* %-off — never add them (e.g., 25% + $10 ≠ $32.50 off $100).

Retail Discount Red Flags

⚠️ Avoid these sneaky tactics:

• Fake MSRP anchoring** — “Was $199, Now $99” on item that never sold for $199
• Doorbuster fine print** — “While supplies last” → 2 units per store
• Coupon expiration traps** — Auto-applied email coupons expire before cart checkout
• Stacking blocks** — “Not valid with other offers” buried in tiny font

✅ Smart Shopper Tips**:

• Check price history with CamelCamelCamel (Amazon) or Honey
• Screenshot final cart *before* checkout — for price-matching
• Ask: “Is this the best price your system shows?” — CSR overrides exist

2025 Discount Benchmarks

Discount Type	Typical Range	Effective Savings
Cyber Monday	15–30%	22% avg (electronics)
Clearance	30–70%	52% avg (apparel)
Loyalty Email	10–20%	15% (stacks with sale)
$ Off Coupon	$5–$50	$18 avg (best on >$100 items)

📉 Stacking Impact** ($100 item):

• 25% off: **$75** (save $25)
• 25% + $10 coupon: **$65** (save $35)
• 25% + 10%: **$67.50** (save $32.50)
• 25% + 10% + $10: **$57.50** (save $42.50)

How to Use This Calculator

➡️ Single Discount

“$89.99, 25% off + $5 coupon — final price?” → **$62.49**

➡️ Stacked Discounts

“20% off + 15% coupon — effective discount?” → **32%** (not 35%)

➡️ With Tax

“$79.99 + 8.5% tax — pre vs. post discount?” → $83.32 vs. $85.30

➡️ Savings Planner

“$500 goal, save $25/wk — time to target?” → **20 weeks**

Note: Uses compound discount math. Assumes coupons apply after %-off. Tax calculated per jurisdiction standard.