Coupons can shape pricing strategy, influence customer behavior, and determine when and how revenue shows up. In a 2025 survey, 82% of US shoppers said they use coupons and discounts to help them cope with high prices. When businesses use coupons strategically, they create demand for their products without eroding value. Used poorly, they train customers to wait for a discount and potentially compress a company’s margins.

Below, we’ll explain what a coupon is, why businesses use coupons, and how coupons work at checkout.

What’s in this article?

• What is a coupon?
  
• Why do businesses use coupons?
  
• What types of coupons do businesses offer?
  
• How do coupons work at checkout?
  
• What rules and restrictions apply to coupons?
  
• What’s the difference between coupons, discounts, and promo codes?
  
• How Stripe Checkout can help
  

What is a coupon?

A coupon is a promise of savings on a product or service that only becomes real when a customer uses it. A coupon can take the form of a paper voucher, digital code, barcode on a phone, or offer stored in an account.

Why do businesses use coupons?

Coupons are a controlled way for businesses to influence buying decisions while protecting long-term pricing and margins.

Businesses use coupons to:

• Acquire new customers: Coupons reduce the risk of a first purchase by lowering the initial price barrier. This is especially effective when the customer has alternatives and needs a clear reason to choose one business over another.

• Accelerate purchase timing: Time-bound coupons push customers to act sooner than they otherwise would. Businesses can convince these customers to take action by adding urgency.

• Increase order value: Spend-threshold coupons encourage customers to add more items to reach the minimum spend required to unlock the discount. This often raises the average order value enough to offset the cost of the coupon itself.

• Influence what customers buy: Coupons can be scoped to specific products, categories, or price tiers. This allows businesses to promote new offerings, rebalance demand, or move inventory without discounting everything.

• Strengthen customer loyalty: Targeted coupons can re-engage customers who haven’t purchased recently or reward those who buy frequently.

• Stay competitive: In markets where discounts are expected, coupons help businesses meet baseline customer expectations without committing to permanent price cuts. They can create flexibility in pricing while preserving the list price.

• Measure marketing performance: Coupon redemptions are inherently trackable. Businesses can tie specific codes to campaigns, channels, or audiences and directly observe how pricing incentives affect conversion and revenue.

When used strategically, coupons offer major benefits for businesses. But when used too frequently, coupons can weaken pricing discipline by training customers to wait for discounts. Businesses should use coupons sparingly, so full prices retain credibility.

What types of coupons do businesses offer?

Different types of coupons solve different business problems. The structure of a coupon (e.g., how it discounts a transaction, what it applies to, and when it activates) determines how customers respond to it.

Here are the most common types of coupons, based on what type of discount they offer:

• Percentage-based coupons: These reduce the price by a set percentage, such as 10% or 25% off. They scale with order size, which makes them effective for higher-priced purchases and broad, storewide promotions.

• Fixed-amount coupons: These subtract a specific amount from the total, such as $10 off an order. Fixed discounts are concrete, and they’re often paired with minimum spend requirements to protect margins.

• Free shipping coupons: Because shipping costs are a common reason for cart abandonment, free shipping coupons can have an outsized impact on conversion.

• Buy-one-get-one (BOGO) offers: These reward customers for purchasing multiple units by discounting additional items. They’re used to increase volume, introduce secondary products, or move excess inventory.

• Free gift with purchase coupons: These add value by including an extra item when certain conditions are met. They work well for product discovery and increasing perceived value without touching core pricing.

Coupons can also be categorized by target audience, timing, or deployment:

• First-time customer coupons: These are reserved for new buyers and typically delivered through signup flows or onboarding emails.

• Loyalty and retention coupons: These are targeted at existing customers based on behavior, purchase history, or membership status. They’re often framed as rewards and help reinforce ongoing relationships.

• Referral coupons: These incentivize customers to bring in new buyers by offering discounts to one or both parties. They turn existing customers into distribution channels.

• Auto-applied coupons: These activate automatically when certain conditions are met, without requiring a code.

• Single-use and personalized coupons: These are unique codes tied to a specific customer or account. They offer tighter control, reduce abuse, and allow for more precise targeting.

• Channel- or region-specific coupons: These apply only in certain geographies, platforms, or sales channels. They help businesses tailor pricing to local markets or experiment without global impact.

How do coupons work at checkout?

Checkout is where the rules of the coupon meet pricing logic and customer intent.

Here’s how coupons work:

• A coupon is entered or applied: In online checkout flows, customers typically enter a code or trigger an auto-applied offer. In physical stores, this might involve scanning a barcode, presenting a voucher, or retrieving a digital coupon tied to an account.

• The system validates the coupon: The checkout system checks whether the coupon is active, unexpired, and eligible for the items in the cart. It also evaluates conditions such as minimum spend, usage limits, customer eligibility, and exclusions.

• The discount is calculated: If the coupon passes validation, the system applies the discount according to its rules. This could mean reducing item prices, subtracting a fixed amount from the order total, or removing shipping costs.

• The updated total is shown immediately: Customers see the adjusted price before completing payment. Making the savings visible at this moment reinforces the value of the coupon and can reduce hesitation.

• Usage limits are enforced: If the coupon is single-use or capped per customer, the system records the redemption and prevents reuse. This enforcement happens automatically in modern checkout infrastructure.

• Only one pricing adjustment applies: In many cases, coupons cannot be stacked with other promotions unless explicitly allowed. The checkout logic determines which discount takes precedence to prevent unintended compounding.

• The redemption is logged: Coupon usage is captured alongside transaction data. This allows businesses to analyze conversion impact, revenue effects, and campaign performance.

What rules and restrictions apply to coupons?

The rules attached to a coupon define who can use it, when it applies, and how much risk the business is taking on. Pricing and marketing teams should work together to determine the best way to roll out coupons to meet the company’s goals.

Here are common rules and restrictions for coupons:

• Expiration dates: Coupons are often only valid within a defined time window. This limits financial exposure and creates urgency without permanently altering pricing.

• Eligible products or categories: Coupons can apply only to specific items, collections, or price tiers. Exclusions are common for already discounted items, gift cards, or products with tight margins.

• Minimum purchase requirements: Many coupons require customers to spend a certain amount before the discount applies. This helps offset the cost of the coupon by increasing order value.

• Usage limits per customer or order: Coupons are often restricted to one use per customer, per account, or per transaction. These limits prevent repeated redemptions that could erode margins.

• Customer eligibility rules: Some coupons are reserved for first-time buyers, returning customers, or specific segments. Eligibility can be enforced through account status, email address, or unique codes.

• Non-stackability with other offers: Coupons typically cannot be combined with other discounts unless explicitly allowed. This prevents unintended double discounts.

• Channel or location restrictions: A coupon can be valid only online, in-store, or in specific regions. This allows businesses to tailor promotions without global impact.

• Single-use or personalized codes: Unique codes can be tied to an individual customer or account. This reduces fraud, limits sharing, and enables more precise targeting.

• No cash value and transfer limits: Coupons generally cannot be redeemed for cash or transferred freely. This reinforces that they’re conditional price adjustments, not monetary equivalents.

What’s the difference between coupons, discounts, and promo codes?

The terms coupon, discount, and promo code are often used interchangeably, but they describe slightly different parts of the same pricing mechanism.

Here’s how to understand the distinction between coupons, discounts, and promo codes:

• Coupon: A coupon is the mechanism that defines the rules of a price reduction. It specifies the conditions under which a discount can be applied, such as eligibility, timing, and scope.

• Promo code: A promo code is the input a customer uses to redeem a coupon. It’s the string of characters entered at checkout that activates the underlying coupon rules.

• Discount: A discount is the result. It’s the reduced price that appears after the coupon is successfully applied, regardless of whether the coupon was triggered by a code or applied automatically.

Some discounts are applied without customer input when conditions are met. These discounts function like coupons, even though no code is visible to the customer.

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