How to never pay full price: the checklist

The 7-step checklist

1. Confirm the price is actually good. Check the price against its recent history before you do anything — a “sale” price that’s higher than last month isn’t a deal. (DealStacker shows price history on search results.)
2. Find a working voucher code. Search the retailer’s own offers page, plus our UK voucher codes hub. Apply the code first — it’s usually a percentage off the headline price.
3. Buy a discounted gift card to pay with. If the retailer sells e-gift cards below face value, buy exactly what you’ll spend and pay with it for a near-guaranteed few percent off. See our gift card guide.
4. Click through a cashback site. Start your purchase by clicking the retailer from a cashback portal so the sale is tracked. Our cashback sites guide compares the big three.
5. Apply loyalty / member pricing. Scan your loyalty card for member prices, and use any eligibility discount you hold (student or membership scheme) if it applies.
6. Pay with a rewarding card. If you have a debit or credit card that earns cashback or points, use it for the final payment — it’s a small extra layer on top, at no cost if you clear the balance.
7. Keep the confirmation. Screenshot the order and cashback click so you can chase anything that doesn’t track. See why cashback didn’t track.

A quick worked example

Say a £100 item. A 10% code takes it to £90. You pay with a gift card bought at 5% off, so it really costs you £85.50. Cashback at 4% on the £90 tracked total returns ~£3.60 later. Net cost: about £81.90 — roughly 18% off, on an item that wasn’t even on a special offer. (Figures are illustrative; real rates vary.)

The mistakes that cost people money

• Getting the order wrong — some layers cancel each other if applied in the wrong sequence. See the order guide.
• Forgetting to start at the cashback portal — if you don’t click through first, the sale won’t track.
• Over-buying gift cards — only buy what you’ll actually spend; leftover balances erode the saving.
• Chasing a tiny code and missing a big price drop — the base price matters most, which is why step 1 comes first.

Let DealStacker run the checklist for you

DealStacker checks the layers automatically and shows the genuinely cheapest stacked price for a product. Search a product to see your stack.

How we make money: DealStacker is free. When you click through to a retailer or partner and buy, we may earn a commission. It costs you nothing extra and never changes which deal we rank cheapest.

Discount-stacking checklist — FAQ

What order should I follow to stack discounts before I check out?

Check the price history first so you know the deal is genuine, then apply a voucher code, buy a discounted gift card to pay with, click through a cashback portal, apply any loyalty or member pricing, and pay the balance on a rewarding card. Doing the steps out of order — especially clicking cashback last instead of first — is the most common way people lose a layer of saving.

Why does cashback sometimes not track even when I follow the checklist?

The most common cause is not starting the purchase by clicking through the cashback portal — if you go straight to the retailer's site first, the click usually isn't tracked. Screenshotting your order and cashback click when you buy makes it much easier to chase up anything that doesn't track.

How much can stacking discounts actually save on an average order?

In this guide's worked example, a £100 item with a 10% code, a gift card bought at 5% off and 4% cashback worked out to roughly £81.90 — about 18% off an item that wasn't even on sale. Real voucher, gift-card and cashback rates vary by retailer and change over time, so treat that as an illustration rather than a guarantee.

Is it worth buying a discounted gift card just to save a few percent?

Usually yes, as long as you only buy what you're actually going to spend — a leftover balance on a gift card eats into the saving you just made. Combined with a voucher code and cashback it's one of the bigger layers in the checklist, but over-buying gift cards is one of the most common mistakes that costs people money.