Unique coupon codes are a game-changer for Shopify brands using Klaviyo.

Unlike static discount codes that anyone can reuse, unique coupon codes are generated once per customer. They prevent abuse, allow for better personalisation, and help you track who uses them.

Want higher conversions, better ROI, and more control over your promotions? Unique coupon codes are the way.

What Are Unique Coupon Codes and Why Use Them?

Unique coupon codes are one-time-use discount codes automatically created for each customer. Unlike static codes, which anyone can use and share, these codes are private, trackable, and tailored to individuals. That makes them ideal for smarter promotions and better list control.

Static vs. Unique Coupon Codes in Klaviyo

• Static Codes: These are the same for everyone. They’re reusable, easy to share, and best for general campaigns like a weekend sale or a site-wide offer.

• Unique Codes: These are automatically generated per person and can only be used once. They’re ideal for flows like welcome offers, abandoned carts, or VIP deals.

  
  

Why Use Unique Codes?

• Prevents Discount Abuse: Stops customers from reusing or sharing codes.

• Boosts Personalisation: Each shopper gets a tailored discount just for them.

• Improves Conversion Rates: People feel special when the offer is exclusive.

• Tracks Performance: See exactly who used their code and what they bought.

• Supports Automation: Works seamlessly with flows and campaigns in Klaviyo.
  
  

When to Use Unique Coupon Codes (Practical Scenarios)

Unique coupon codes work best when the offer needs to feel exclusive, secure, and personalised. Here are key scenarios where they shine:

Welcome Discounts

Give new subscribers a reason to buy right away. Add a unique code in your Klaviyo welcome flow that gives first-time customers 10%–20% off. This encourages faster conversions and makes them feel valued from the start.

Cart Abandonment Offers

Recover lost sales by adding a limited-time code inside your abandoned cart flow. Use expiry timers to create urgency—like “Your 15% off code expires in 48 hours!”—and make sure it can only be used once.

Win-Back Campaigns

Trying to re-engage customers who haven’t bought in a while? Send them a personalised, one-time-use code to give them a reason to come back. Unique codes also let you track who’s still interested—helping you clean your list over time.

VIP & Loyalty Rewards

Reward your best customers with codes no one else gets. You can segment VIPs based on lifetime spend, number of purchases, or high AOV, then send tiered or early-access discount codes that feel exclusive.

We go deeper into segmentation strategies in 3 Klaviyo Segmentation Strategies to Boost DTC Sales, where you’ll learn how to identify VIPs and trigger targeted offers based on real customer behaviour.

Pre-Launch & Exclusive Drops

Planning a new product launch or limited release? Use unique codes to give select customers early access. This builds hype and ensures that access stays limited—no mass sharing or code leaks.

Step-by-Step Guide to Setting Up Unique Coupon Codes in Klaviyo for Shopify

Step 1 – Confirm Shopify Integration

• Go to Integrations > Shopify in Klaviyo.

• Make sure the "Coupons" tab appears.

• If missing, update settings or re-authenticate.

Step 2 – Create a Unique Coupon in Klaviyo

• Go to Content > Coupons > Create Shopify Coupon.

• Set name, prefix, and discount type (percentage, fixed, or free shipping).

• Choose whether it applies to the whole order, specific products, or collections.

• Add rules like minimum cart value or country-specific shipping.

  
  

Step 3 – Set Activation & Expiry Dates

• Campaigns: Choose between no expiry or a fixed date.

• Flows: Use fixed, rolling (e.g. 3 days), or no expiry.

• Note: Shopify expiration is based on the store's timezone. Klaviyo adds a 24-hour buffer for late sends.

  
  

Step 4 – Generate Coupon Codes (Campaigns Only)

• For campaigns, click the 3-dot menu > Add Codes.

• Estimate recipients and generate enough codes.

• Monitor the progress bar to ensure all codes are ready before sending.

  
  

Step 5 – Add Codes in Emails & SMS

• Email: Insert using {% coupon_code 'COUPON_NAME' %}.

• SMS: One code per message. Keep it short and clear.

  
  

Step 6 – Use in Flows

• Add your coupon tag to the flow email template.

• Codes are automatically replenished in batches of 100.

• If a customer sees the same code again, it means the previous one hasn’t expired yet.

Step 7 – Use in Signup Forms

• Add a coupon block to your form.

• Choose a unique Shopify coupon or create one inside the form builder.

• Add a static fallback coupon in case codes run out.

  
  

Step 8 – Test Before Sending

• Campaigns: Send a preview to generate real codes.

• Flows: Trigger flow actions and check the "Needs Review" tab to send the test.

• Remember: Previews inside Klaviyo show "COUPON_NAME-preview" only.

Testing is critical not just for coupon logic, but for performance across your whole account. Our checklist on Email Deliverability: Step-by-Step Checklist to Stay Out of Spam helps ensure your emails land where they should.

Source: Klaviyo 

9 Advanced Strategies for Unique Coupon Codes in Klaviyo

1. Segment Your Audience for Maximum Impact

• Personalising discount codes based on customer behaviour.

• Key segments: New subscribers, VIP customers, cart abandoners, lapsed customers, high AOV shoppers, and seasonal buyers.

2. Use Scarcity & Urgency to Increase Conversions

• Psychological triggers to boost urgency: Time-sensitive discounts, inventory-based scarcity, exclusive one-time codes.

• A/B testing urgency-driven messaging for better performance.

Need help crafting urgency that drives clicks? Take a look at our favourite Countdown Timers for Email to add time-sensitive visual cues to your next promo.

3. Monitor & Optimise Coupon Performance for Better ROI

• Tracked redemption rates, A/B tested discount structures, and measured revenue impact.

• Preventing coupon abuse through one-time use restrictions.

We break down which A/B tests move the needle most in our guide: 10 Essential A/B Tests to Boost Email Conversions.

4. Tiered Discounts for VIP & High-Spend Customers

• Rewarding high-value customers with exclusive discounts and early access coupons.

• Implementing tiered discount structures based on spending thresholds.

5. Post-Purchase Upsell Coupons

• Encouraging repeat purchases with thank-you discounts and bundled offers.

• Using dynamic expiration dates to create urgency in post-purchase flows.

6. Integrate Coupons with SMS for Multi-Channel Impact

• Enhancing email campaigns with SMS-exclusive coupon codes.

• Coordinating cart abandonment sequences across email and SMS.

Looking to increase your SMS list size before launching multi-channel promos? Don’t miss our 5 Proven Techniques for Increasing SMS Opt-Ins in Klaviyo.

7. Advanced Coupon Strategies for Shopify Growth

• Gamified discounting strategies (e.g., spin-to-win, mystery discount emails).

• A/B testing percentage-off vs. fixed amount discounts.

8. Smart Expiration Strategies for Maximum Conversions

• Setting expiration windows based on customer behaviour.

• Balancing urgency with conversion rates using dynamic expiration.

9. Prevent Coupon Abuse & Profit Loss

• Restricting coupon usage with one-time use policies, cart minimums, and exclusion rules.

• Leveraging Klaviyo’s conditional logic to optimise discounting.

One-time use codes are just the start—read our breakdown of Klaviyo’s Low Inventory Flow to learn how stock-based automation can further protect margins and drive urgency.

Common Mistakes to Avoid When Using Unique Coupon Codes in Klaviyo

Even powerful tools like unique coupon codes can backfire if they’re not set up correctly. Before you hit send, make sure you’re not falling into these common traps that can hurt performance or break automation.

Pro Tip: Always test coupon logic in Klaviyo before launching a campaign.

FAQs

1. Can I track who used each coupon code?

• Yes, Klaviyo logs redemptions for each user and syncs to their profile.

2. Can I use unique codes in SMS?

• Yes, but only one code per message is allowed. Keep it short and clear.

3. What happens if I run out of codes?

• Emails will fail to send for users without a code. Always generate enough codes in advance.

4. Can I expire codes automatically?

• Yes. Use fixed or rolling expiration dates when setting up your coupon.

5. Can unique coupon codes reduce abuse?

• Absolutely. They're one-time use and can't be shared across customers.

Conclusion

Unique coupon codes don’t just protect your discounts, they make every offer feel personal, secure, and time-sensitive. 

Instead of blasting the same code to your whole list, you're building real, 1:1 experiences. When done right, this leads to higher conversion rates, stronger engagement, and more predictable performance.

Whether you're just starting or scaling up, Klaviyo makes it easy to automate, test, and refine your coupon strategy for long-term success.

If you're rethinking your entire retention strategy, our walkthrough on 8 Essential Klaviyo Flows to Boost Customer Loyalty is a must-read for scaling your lifecycle marketing across key touchpoints.

Key Takeaways

• Unique Coupons Protect Your Margins – One-time-use codes reduce abuse, boost trust, and increase conversions.

• Klaviyo Makes It Easy – Automate discount delivery across flows like welcome, cart abandonment, and VIP loyalty.

• Use Segmentation for Smarter Incentives – Tailor discount value and timing to customer behaviour and value tiers.

• Combine Email & SMS – Multi-channel delivery improves reach and drives urgency for time-sensitive offers.

• Test and Optimise Everything – From A/B testing code value to expiry timing, always be learning and iterating.

• Avoid Common Setup Mistakes – Don’t forget to set expiries, track performance, and pre-generate enough codes.

Struggling with coupon abuse and lost revenue? 

Learn how to set up secure, unique coupon codes in Klaviyo for Shopify to protect your margins and drive conversions. Click here for a free audit and discover smarter retention strategies.