# Applying Coupon Codes in Adalo ### {% embed url="" %} ### Purpose This document explains how to build a coupon code system in Adalo that supports: * Fixed dollar discounts (e.g. $5 off) * Percentage-based discounts (e.g. 10% off)\
The solution uses native Adalo features only—no custom actions, external APIs, or third-party tools. *** ### What This System Supports * Validating coupon codes entered by users * Applying discounts dynamically at checkout * Supporting both fixed and percentage discounts * Removing or changing coupons without leaving checkout * Using the same logic across carts, orders, or subscriptions *** ### High-Level Flow 1. Coupon codes are stored in a database 2. Users enter a coupon code at checkout 3. Adalo validates the code using a filtered list 4. The discount is calculated and stored on the logged-in user 5. Totals are recalculated automatically\
*** ### Step 1: Create the Coupon Codes Collection Create a new collection named: Coupon Codes #### Required Properties | Property Name | Type | Purpose | | -------------- | ------------ | ------------------------------------------- | | Name | Text | The coupon code users type (case-sensitive) | | Amount Off | Number | Dollar amount or decimal percentage | | Is Percent Off | True / False | Identifies discount type | *** #### Coupon Value Rules Fixed Discount Example * Coupon: $5OFF * Amount Off: 5 * Is Percent Off: false Percentage Discount Example * Coupon: 10OFF * Amount Off: 0.1 * Is Percent Off: true 💡 Tip:\ Store percentages as decimals.\ 10% = 0.1, 20% = 0.2, etc. *** ![](/files/srpikMFEEji0CJDBF7Pf) *** ### Step 2: Add Coupon Input to Checkout Screen On your checkout or payment screen: #### Add a Text Input * Label: Coupon * Purpose: User enters the coupon code #### Add a List * Collection: Coupon Codes Filter:\ Name = Coupon Input #### Optional Visibility Rule Coupon Input is not empty
💡 Why this matters\ This prevents invalid coupons from appearing and hides UI when no code is entered. *** ![](/files/fzqfhGozfAtcIT48SUcd) *** ### Step 3: Add an Apply Coupon Button Inside the Coupon Codes list, add a button: * Label: Apply * (Optional) Show the coupon name for testing/debugging\
This button will trigger the discount logic. *** ### Step 4: Create the Coupon Amount Property On the Logged-In User collection, create a number property: Coupon Amount This property stores the actual dollar value of the discount, regardless of coupon type. *** ### Step 5: Fixed Amount Discount Logic #### Button Action Update Logged-In User #### Only Run If Is Percent Off = false #### Set Value Coupon Amount = Amount Off Example * $5 off → Coupon Amount = 5\
*** ### Step 6: Percentage Discount Logic Percentage discounts must be converted into a dollar amount. #### Button Action Update Logged-In User #### Only Run If Is Percent Off = true #### Formula Coupon Amount = Amount Off × Cart Subtotal Example $9.00 × 0.1 = $0.90
⚠️ Important\ Always calculate the percentage against the subtotal before tax. *** ![](/files/uUixvni5n62NY22U0tjV) *** ### Step 7: Show Coupon in Checkout UI Use conditional visibility to keep the UI clean. #### Visibility Rule Coupon Amount > 0
#### Display Elements * Coupon label * Discount value (shown as a negative amount) * Optional “Remove Coupon” button\
*** ### Step 8: Remove Coupon Option Add a small X or Remove Coupon button. #### Click Action Update Logged-In User Coupon Amount = 0 #### Visibility Rule Coupon Amount > 0 This allows users to remove a coupon without restarting checkout. *** ### Step 9: Update Subtotal & Total Calculations #### Subtotal Formula Subtotal = Cart Subtotal − Coupon Amount #### Total Formula Total = (Cart Subtotal − Coupon Amount) + Tax This logic works for: * Single-item carts * Multi-item carts * Add-ons * Persistent user carts\
*** ### Best Practices & Notes * Coupon codes are case-sensitive * Store the coupon value on the logged-in user for easy access * Admins can manage coupons directly in Adalo * This pattern works without custom actions or external tools\
*** ### Summary This setup allows you to: * Validate coupon codes natively * Support both fixed and percentage discounts * Apply coupons dynamically at checkout * Keep all logic inside Adalo\
It’s flexible, scalable, and production-ready.
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