The short answer
“Spend $50, get $10 off” is 20% off only when you spend exactly $50
A fixed coupon is worth the coupon amount divided by your eligible purchase amount. The coupon stays at $10 while a larger cart makes that $10 a smaller percentage of what you spend.
The effective discount changes with your cart
A “Spend $50, get $10 off” coupon takes the same $10 off each eligible cart. The rate changes because the cart total changes.
Scroll the table horizontally if needed.
| Eligible purchase | Coupon savings | You pay | Effective discount |
|---|---|---|---|
| $50 | $10 | $40 | 20% |
| $60 | $10 | $50 | About 16.7% |
| $100 | $10 | $90 | 10% |
At $50, $10 ÷ $50 × 100 = 20%. At $60, $10 ÷ $60 × 100 = about 16.7%.
Is it worth adding more to use the coupon?
First compare the payment after the coupon with your current cart. Then separately ask whether you actually need the item you would add.
Scroll the table horizontally if needed.
| Current cart | Amount to add | Payment after coupon | Difference from current cart |
|---|---|---|---|
| $42 | $8 | $40 | $2 lower |
| $30 | $20 | $40 | $10 higher |
From a $42 cart, adding $8 reaches the threshold and leaves a $40 payment. The math is favorable, but only if that $8 item is something you would genuinely buy. From a $30 cart, buying solely to reach the threshold raises your payment to $40.
Read the offer terms before you rely on the math
- Eligible subtotal: The threshold may exclude tax, shipping, sale items, or specific brands.
- Timing: Some stores check the threshold before rewards are applied; others check it afterward.
- Stacking: Another coupon or promo code may not combine with this one.
- Limits: A coupon can have a maximum savings amount or one-use restriction.
If you are choosing between a percent-off offer and a dollar-off offer on the same purchase, use the Percentage Off vs. Dollar Off Calculator.
Frequently asked questions
Does spending more always make the coupon worse?
No. You may still need everything in a larger cart. It only means the fixed coupon represents a smaller percentage of that larger purchase.
Does the threshold include shipping and tax?
That depends on the store. Enter only the amount the offer says counts toward the minimum spend.
Can I combine a minimum-spend coupon with other discounts?
Possibly, but stores set different rules and calculation orders. Check the terms and the final checkout total.