How to Enable Maximum Coupon Discount in WordPress

What Is the Enable Maximum Discount Amount feature?

WooCommerce coupons apply their discount without limits. If a coupon says “20% off” and the cart total is $1000, the discount is $200. For high-value carts, this can erode profit margins.

The Enable Maximum Discount Amount feature caps the discount at a configured limit. The coupon’s calculated discount is applied up to the limit; the customer pays the cart total minus the capped discount.

Why You Need It

For stores with high-value products, unlimited coupon discounts are a risk:

• Profit margin protection: A 50% off coupon on a $5000 order is a $2500 loss
• Promotional control: Different limits for different times (e.g., higher limits during sales) or customer types
• Abuse prevention: Limits prevent coupon abuse by limiting the maximum benefit

For most stores with high-value products, this is a high-ROI feature.

How to Enable Maximum Discount Amount in WordPress

Step 1: Navigate to Settings

Click into the Classic Monks plugin settings in your WordPress dashboard.

Step 2: Go to the WooCommerce Tab

Click on the WooCommerce menu, then click the Coupons subtab.

Step 3: Enable Maximum Discount Amount

Toggle on Enable Maximum Discount Amount for Coupons. Nested options expand.

Step 4: Configure the Limit Type

The 6 sub-options control the limit behavior:

• Enable Time-Based Maximum Discounts: Set time-of-day or day-of-week limits
• Enable Role-Based Maximum Discounts: Different limits per user role
• Enable Category-Specific Maximum Discounts: Different limits per product category
• Enable Tiered Maximum Discounts: Different limits based on cart total (e.g., $50 cap for carts under $100, $100 cap for carts over $100)
• Enable Maximum Discount Analytics: Track how often limits are hit
• Enable Real-Time Discount Preview: Show the admin a preview of the capped discount

Step 5: Set the Global Maximum

Use the coupon edit screen to set a maximum discount amount per coupon. The Maximum Discount Amount metabox is added to the coupon data.

Step 6: Save Changes

Click Save Changes.

Step 7: Test

Add a product to cart, apply a coupon, and verify the discount is capped at the configured limit.

Configuration Options

Option	Description	Default
Enable Maximum Discount Amount for Coupons	Master toggle.	Off
Enable Time-Based Maximum Discounts	Time-of-day or day-of-week limits.	Off
Enable Role-Based Maximum Discounts	Per-role limits.	Off
Enable Category-Specific Maximum Discounts	Per-category limits.	Off
Enable Tiered Maximum Discounts	Cart-total-based limits.	Off
Enable Maximum Discount Analytics	Track limit hits.	Off
Enable Real-Time Discount Preview	Admin preview.	Off

The actual maximum discount amount is set per coupon in the coupon edit screen.

What Gets Affected

• Coupon application: the discount is capped at the configured maximum
• The cart total: the customer pays the capped amount (not the full coupon discount)
• The order total: reflects the capped discount
• The order meta: includes the original and capped discount amounts (for audit)

What Does NOT Get Affected

• The coupon code itself: the code is unchanged
• The coupon’s discount percentage or fixed amount: unchanged
• The coupon’s other conditions (minimum spend, product restrictions, etc.): unchanged
• The customer’s cart UI: the discount line shows the capped amount (not the original)

Advanced Options (Developers)

This feature registers 3 WordPress hooks in coupon-max-discount.php:

Actions:

• add_meta_boxes calls cm_add_max_discount_coupon_meta_box() (Adds max discount metabox to coupons)

Filters:

• woocommerce_coupon_get_discount_amount calls cm_coupon_apply_max_discount_limit() (Applies max discount limit to coupon (priority 10))
• woocommerce_coupon_is_valid calls cm_coupon_validate_max_discount() (Validates coupon max discount limit (priority 10))

// Hooked in coupon-max-discount.php
add_filter( 'woocommerce_coupon_get_discount_amount', 'cm_coupon_apply_max_discount_limit' );

The feature modifies WooCommerce behavior by registering or removing hooks. Disabling it reverses those changes.

Troubleshooting

The maximum discount is not being applied

Cause: The toggle is off, or no maximum is set for the specific coupon.
Fix: Verify the toggle is on. Edit the coupon and set a maximum discount amount in the Maximum Discount Amount metabox.

The maximum is too low

Cause: The maximum is set lower than the actual coupon discount.
Fix: Edit the coupon and increase the maximum discount amount. The cap is per-coupon, so you can set different caps for different coupons.

The maximum is too restrictive

Cause: The maximum is set very low, blocking otherwise valid coupons.
Fix: Edit the coupon and increase the maximum. Use the “Enable Real-Time Discount Preview” option to see the capped discount before saving.

The maximum is set but not respected

Cause: A caching plugin is serving the old discount calculation.
Fix: Clear all caching layers. The maximum is applied at the time of coupon calculation, so caching can show the old (uncapped) amount.