To display/show product price including tax amount, you need to do some configuration settings.
1. Create Tax Rule
You need to create tax rules (Sales -> Tax -> Manage Tax Rules). For this, you can refer to different tutorials available over the internet on creating Tax rules.
2. Assign Tax Rule to Product
Then, you need to assign the Tax rule to product.
– Edit product (
Catalog -> Manage Products)
– Go to ‘Prices’ tab
– Select your Tax rule from the ‘Tax Class’ select box
– Save the product
3. Configuration Settings to show Product Price including Tax
Now, go to configuration settings (System -> Configuration -> SALES -> Tax -> Price Display Settings -> Display Product Prices in Catalog).
You have three options there. To show product price:
a) Excluding Tax
b) Including Tax
c) Including and Excluding Tax
That’s all. Now, you should be able to see the frontend product price as per your configuration setting.
If you need to display product price including tax programmatically (using programming code), then here is how to do so:
$productId = YOUR_PRODUCT_ID; // your product id number
$_product = Mage::getModel('catalog/product')->load($productId);
$_priceIncludingTax = Mage::helper('tax')->getPrice($_product, $_product->getFinalPrice(), true);
Hope this helps. Thanks.