Learn when free shipping boosts sales and when it hurts your bottom line—plus how to calculate it right.
The Free Shipping Decision "Free shipping" is a powerful sales tool, but it's not actually free—you're paying for it. Here's how to use it strategically without killing your margins. Benefits of Free Shipping Better search visibility. Many platforms boost "free shipping" listings in search results. Higher conversion rates. Buyers hate unexpected shipping costs at checkout. Competitive advantage. Stands out against similar listings charging postage. Perceived value. "Free" always feels like getting something extra. The Hidden Risks Margin killer if miscalculated. £3 5 postage on a £15 item is 20 33% of revenue. Distance variations. UK postage is mostly flat rate, but some services vary. Weight surprises. Underestimating packaging weight eats profit. When Free Shipping Works ✅ Higher priced items (£30+) where postage is small percentage ✅ Lightweight items with cheap postage costs ✅ Popular items where higher price still sells ✅ Competitive categories where it's expected When to Charge Separately ✅ Low margin items where every pound matters ✅ Heavy or bulky items with expensive postage ✅ Unique items buyers will pay shipping for ✅ When competitors also charge shipping How to Calculate Build shipping into your price: Item cost: £8 Postage: £3.50 Packaging: £0.80 Target profit: £10 Platform fees: 13% Price calculation: (£8 + £3.50 + £0.80 + £10) ÷ 0.87 = £25.63 Round to £25.99 = "Free shipping" price The Hybrid Approach Offer both options when possible: Standard price + shipping cost Higher "free shipping" price Let buyers choose—some prefer the transparent breakdown. Pro Tip O