> ## Knowledge Base Index > Fetch the complete knowledge base index at: https://help.tunl.to/sitemap.xml > Use this file to discover available pages before exploring further. > Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash). # Why Is There a Shipping Rate Difference Between TUNL and My Store? 📦💸 So, you’ve just booked a shipment on TUNL, but the rate looks different from what your customer saw at checkout? 🤔 Don’t stress - it’s not a glitch in the matrix. Here’s what’s likely going on (and how to fix it for good). 🧭 TL;DR: To keep your shipping costs accurate and consistent, make sure your product weights are set up correctly and that you understand how chargeable weight works. --- ### 1. It All Starts With Product Weights ⚖️ Setting product weights in your eCommerce store isn’t just a box to tick - it’s essential for: * Showing accurate shipping rates at checkout * Avoiding undercharging (which eats into your margins) 😬 * Preventing overcharging (which can lead to cart abandonment) 🛒 **Let’s make sure your store’s weights reflect reality.** --- ### 2. Chargeable Weight: The Crux of Your Shipping Costs 📏📦 Couriers don’t just bill based on what the scale says. They use something called **chargeable weight**, which is: The **higher** of: * Actual weight (kg) ⚖️ * Volumetric weight (based on size) 📐 ### 🧠 Example Time! Let’s say your parcel looks like this: * **Dimensions:** 50cm x 30cm x 10cm * **Actual Weight:** 1kg Now let’s do the math 👇 **Volumetric Weight** = (50 × 30 × 10) ÷ 5000 = **3kg** **Actual Weight** = **1kg** ✅ **Chargeable Weight** = **3kg** (Because volumetric is higher than actual) ||| 📝 Always remember: couriers will charge for whichever is bigger, mass or volume. And this is where product dimensions can really sneak up on your costs. **Examples:** * A feather-light pillow 🛏️? Probably gets charged based on volume. * A dense jar of jam 🍯? Charged on actual weight. ||| So if your product is big but light or small but heavy, your customer’s shipping rate might not reflect the final TUNL rate unless your setup accounts for this. --- ### 3. Think About Cart Size 🛍️ Are your customers buying: * One item at a time? * Or do they bundle up two or three goodies per order? The more items in a parcel, the more likely you’ll move into a different pricing bracket. Couriers typically charge in **0.5kg increments**, so even small differences can affect your final cost. | 💡 Pro tip: If you can fit two items in the same box, that could save you (and your customer) money. But only if your product weights reflect this accurately. --- ### 4. Multi-Piece Shipments for Weird Shapes 🧩📦 If your parcels are playing Tetris badly, full of dead space and awkward shapes, you might be paying extra for air. That’s where multi-piece shipments come in handy. Splitting items into separate parcels can help you dodge high volumetric weight and save on costs. 👉 Need help? Follow our [How to Book a Multi-piece Shipment guide](https://help.tunl.to/en/article/booking-multi-piece-shipments-with-tunl-3jhmm/). --- ### 5. How to Weigh Your Products Properly 🪙📏 Get hands-on! We recommend physically weighing and measuring your products. Here’s how: 1. **Start with one product:** * Weigh & measure unpacked * Weigh & measure packed (ready to ship) 2. **Try a bundle:** * Pack two items together * Weigh the packed bundle 🎯 Once you’ve got your numbers, **update your product listings in Shopify or WooCommerce**. ||| Don’t forget: If you’re adding duties & taxes at checkout, you’ll also need to add the [**HS Code**](https://help.tunl.to/en/article/what-is-an-hs-code-and-hts-code-sez7qh/) to each product. --- ### 6. Discounts and handling fees If you've set up a discount or handling fee in TUNL, your customer's shipping price is different from what you pay when you book. * **Discount:** your customer pays less, and you cover the difference. * **Handling fee:** your customer pays more, and you keep the difference. Check them under **Settings → Integrations → Store Integration**. If you also have a handling fee on the TUNL rate in Shopify, it applies on top. --- ### 7. Outlying Area Charges 🏞️ One last thing - if your customer lives in an outlying area, **extra courier fees might apply**. These won’t show up in your store unless you’re using TUNL’s [Shopify Live Rates Integration](https://help.tunl.to/en/article/shopify-live-rates-integration-guide-16gpes8/). 📌 If you're not using Live Rates, the charge may appear only when booking via your TUNL profile. ### **Related Articles 🧠** * [Which integration is best for you?](https://help.tunl.to/en/article/which-integration-option-is-best-for-my-business-9u5257/) * [Shopify Basic Rates Integration](https://help.tunl.to/en/article/shopify-basic-integration-how-to-add-shipping-rates-icka4t/) * [Shopify Live Rates Integration](https://help.tunl.to/en/article/shopify-live-rates-integration-guide-16gpes8/) * [How to Set Up the TUNL WooCommerce Plugin](https://help.tunl.to/en/article/how-to-set-up-the-tunl-woocommerce-plugin-jevqjj/) --- ### 🦸‍♀️ Have more questions? We're here to help! If you run into any issues or have questions, reach out to our support team via Whatsapp [**here**](http://wa.link/gpiyz3) or on chat [**here**](https://tunl.to/#crisp-open). **Please help us help you by rating this article below. Was it useful? Your feedback means a lot to us!** --- **Keywords:** Rate Difference | Discrepancy