# Add charge v3.0 (Current)
This new version is applied to stores that installed our app **after 10:00 AM, October 10 2025 (UTC)**.
## A. How to Create an Add Charge
Follow these steps to set up the Add Charge feature:
**1. Create a New Option Set**
Go to the **Avis Option tab** → click **Create Option Set**.
**2. Add an Option**
Click **Add Option** and choose the **Option Type** for your Add Charge (e.g., dropdown, button, swatch, etc.).
**3. Set the Add Charge Value**
Under **Option values**, find the value you want to add a charge to.
* Click **Keep price** → choose **Add charge** from the dropdown.
* Enter the amount you’d like to add to the product’s base price.
Example:\
If you set 25 for Medium and 30 for Large, and your store’s default currency is USD, the additional charges will be $25 and $30.
**4. Assign to Products**
In the **Select product** section,
choose the products that should include this Option Set.\
Finally, click **Save** at the top right corner to apply your changes.
### Special: Add Charge by Percentage
You can also set an add charge based on a percentage of the product price instead of a fixed amount.
For example, if the product price is **$100** and you set a **10% add charge**, the extra charge will be **$10**, making the final price **$110**.
This is useful for fees that should change depending on the product price, such as warranty, rush production, gift wrapping, or premium upgrades.
> Note: Percentage add charge is calculated based on the product price and will update automatically if the product price changes.
For example:
| Product price | Percentage add charge | Extra charge | Final price |
| ------------- | --------------------: | -----------: | ----------: |
| $100 | 10% | $10 | $110 |
| $250 | 15% | $37.50 | $287.50 |
| $500 | 20% | $100 | $600 |
## B. How It Appears on Your Store
**-> Here is how the Add Charge will show on the Product page.**
Customers will see the option values with the updated pricing displayed clearly.
**-> Here is how the Add Charge option will show on the Cart page.**
After selecting an Add Charge option, the product will be added to the cart with the total updated price (base price + add charge).
**-> Here is how the Add Charge option will show on the Checkout page.**
At checkout, the system automatically adds the total price - you’ll see the main product and an associated “add-on” charge line, handled by our app for accurate billing.
## D. What’s New in This Version?
This updated version of Add Charge brings key improvements:
✅ **No extra products created** in your Shopify store.\
→ No need to hide or manage additional add-on products.\
→ No SEO or storefront clutter concerns.
✅ **Works with dynamic checkout buttons** directly on the product page.\
→ The old version only worked at the cart level.
⚠️ **Note:**
* Because no separate add-on product is created, **inventory tracking for Add Charge items is not available**.
* [One-time charge ](/pricing-and-upsell/add-charge-add-ons/up-charge-for-specific-variants/one-time-add-charge-legacy.md)is **not available**
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