Cashback stacking is using two or more cashback methods on the same purchase. A £100 shop gets you £5–10 back at many retailers — and even more in shops like Boots where several cashback offers combine. Once your cashback apps are set up, the extra work is about 30 seconds at the till.

Start with my complete cashback guide if cashback is new to you. This page assumes you’ve already got at least one cashback portal and one gift card app.

How to start

The four-layer setup looks like a lot. It isn’t, once you spread it across two weekends.

Week 1 — the basics: Sign up for one cashback debit card (Chase, Krak, or Uphold) and one gift card app (EverUp*). Make one test purchase using the gift card to see how it works. That’s it.

Week 2 — add the layers: Sign up for a cashback portal (TopCashback*) and install its browser extension. Add a card-linked app (Airtime Rewards*) and a receipt scanner (Shopmium or Clear). Try them on a few purchases to learn which ones to open when.

Later — advanced: Only consider payment chaining or paid membership cashback once the basics are routine. Most people never need either.

Better to use a simple system consistently than build a complicated one and give up.

The four layers that combine

Cashback Card

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Gift Cards

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Shopping Portal

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Receipt Scanner

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More cashback

Most multi-method purchases use 2–4 of these together:

1. A cashback debit card (Krak (2% cashback), Uphold, etc.) — roughly 1–2% paid every time you spend, on top of everything else.
2. A gift card app (EverUp*, JamDoughnut*) — buy a discounted gift card in the app, pay with it.
3. An online cashback portal (TopCashback*, Quidco*) — click through before buying online. Rates run from 1% to 15%+.
4. A card-linked or receipt-scanner app (Airtime Rewards*, Shopmium, Clear) — small extras for specific brands or spends.

Each one works on its own. The trick is using them in the right sequence so they don’t cancel each other out.

The order of operations

For an online purchase:

1. Open your cashback app, search the retailer, click through.
2. At checkout, add a discount code if you have one.
3. Then pay with a gift card or your cashback debit card.
4. When you get the receipt, forward it to your receipt scanning app (Clear! or NX Rewards/Complete Savings if you are a member)

For an in-store purchase:

1. Open your gift card app at the till. Buy a card for the total amount of your shopping.
2. Pay for the gift card with your cashback debit/credit card.
3. Use the gift card to pay for the shop.
4. If you’ve got a card-linked offer (Airtime Rewards, etc.) on the retailer, you might be better using your cashback debit/credit card directly.
5. Submit a picture of the receipt to any and all receipt scanning apps.

That’s it. No tricks, just a sequence.

Examples

£100 weekly shop in-store at Tesco

17.5% off

• Clubcard Plus Big Shop voucher — 10% off your basket £10 off
• EverUp Tesco gift card for the remaining £90 at 4% (rate varies — check the app) £3.60 back
• Cashback debit card used to buy the gift card at 1% ~£0.90 back
• NX Rewards or Complete Savings in-store Tesco receipt submission ~£2 back
• Clubcard points at the till ~£1 back

A £100 shop ends up costing you £82.50

Clubcard Plus is £7.99/month and gives you two Big Shop vouchers (one in-store, one online), each capped at £20 off a £200 basket. Worth it if you do at least one £100+ shop a month and actually use both vouchers — otherwise the membership eats most of the saving.

£100 at Boots — in-store

~22% off

• 10% student discount (linked to Advantage Card) £10 off
• Krak cashback debit card at 1% on the remaining £90 ~£0.90 back
• Airtime Rewards monthly 7% Boots offer ~£7 off your phone bill
• Boots Advantage Card at 3 points per £1 ~£2.70 to spend later
• NX Rewards or Complete Savings in-store Boots receipt submission ~£2 back

A £100 shop ends up costing you ~£77.40

Boots in-store is one of the best combinations I know of!

£100 at Boots — online

~26% off

• 10% student discount linked via Advantage Card £10 off
• TopCashback click-through at 10% on the remaining £90 (rates vary daily) £9 back
• EverUp Boots gift card for £90 at 4% (rates vary daily) £3.60 back
• Boots Advantage Card at 3 points per £1 ~£2.70 to spend later
• Cashback debit card used to buy the gift card at 1% ~£0.90 back

A £100 order ends up costing you ~£73.80

Boots online with the student discount is one of the strongest combinations going — the portal layer alone gives you back as much as some retailers’ best total. Worth knowing: TopCashback’s terms warn against third-party promo codes voiding tracking, but the Boots student discount applies via your Advantage Card so it doesn’t trigger that rule.

Payment chaining (advanced)

Payment chaining (or cashback card stacking) is layering payment services on top of each other. When done with certain cards, each layer earns cashback on the same transaction — pushing the payment layer above 2% before any portal, gift card, or scanner adds anything on top.

How the chain works

Each layer charges the one below it. You pay with the top card in the chain; that card draws from the next, which draws from the next, all the way down to your bank. Every layer that pays cashback contributes its rate to the total. Chains can be temperamental — test with a small transaction before relying on one for big spend.

The apps you’ll need

• Zilch* — a hybrid debit/credit card. Pay in full immediately for 0.5–2% cashback (activate the card at specific shops for 2%). Splitting payments forfeits the cashback and usually incurs hefty fees — for chaining you always want “pay in full”.
• Uphold — 1% cashback debit card.
• PayPal Debit Card — created free inside your existing PayPal account; links directly to Zilch as a funding source.

The chains people are running

• Zilch → Curve (old Debit) → Uphold: ~2.5–4% back on the payment layer (Zilch 0.5–2% depending on merchant, Curve premium ~1%, Uphold 1%). Only works with the original Curve Debit — Uphold doesn’t connect directly to Zilch.
• Zilch → PayPal Debit Card → bank: Just Zilch’s 0.5–2%, but the PayPal Debit Card unlocks Zilch on retailers that don’t accept Zilch directly. Create the debit card inside your PayPal account, then add it as Zilch’s funding source.

Tactical wins

• Utility bills via Zilch: Octopus Energy customers can reduce their monthly direct debit to a low fixed amount and top up the rest manually via Zilch for 2% cashback on every payment. Switch to Octopus and get a £50 bonus → Same trick works for broadband and mobile providers that accept card payments — just remember to top up via Zilch every month, otherwise your usage outpaces your DD and you end up in debit with Octopus.
• The old-Curve-only catch: Curve’s newer cards don’t pass cashback through to the underlying card and don’t function as Zilch funding sources. Only the original Curve Debit works, and Curve no longer issues new ones.
• Curve is now Lloyds-owned: Recently acquired by Lloyds Bank. Customer service is reportedly slow, but the chain mechanic still works for old Curve Debit holders for now — worth a quick test transaction before you rely on it.

Apps that no longer work in the chain

• New Curve cards (issued after the relaunch) — behave as credit cards, can’t be set as Zilch funding sources. Only the original Curve Debit still works.
• SumUp Pay — no longer reliably passes cashback through the chain; not worth setting up now.

Receipt scanners worth knowing

Shopmium works on specific products rather than your whole shop. The app lists rebate offers from brands — often 50–100% off a new product launch (a free yoghurt, half-price cleaning spray, etc.). Buy the item at any UK supermarket, scan the receipt, get the cash back into your Shopmium balance. Free to use, around 2,500 products on rotation, withdraw to your bank or PayPal at £10.

Clear works differently — it pays you a share of what they make from selling your anonymised shopping data. You scan all your receipts (not just specific products), answer occasional surveys, and Clear pays back about a third of the revenue. Less per receipt than Shopmium, but it works on everything you buy rather than a curated list.

Google Opinion Rewards is more survey app than receipt scanner, but receipts you upload trigger location-based surveys on the shops you’ve visited (“How was your visit to Tesco?”). Surveys are short — usually one or two questions — and pay anywhere from a few pence to a couple of pounds. On Android the credit is Play Store only; on iOS you can withdraw to PayPal or Google Pay. Smaller per-receipt earnings than Shopmium, but it’s Google so payouts are reliable and the surveys keep coming.

All three combine with everything else on this page. They kick in after you’ve paid, so they don’t interfere with portal tracking, gift cards, or card-linked offers.

See the full list: All UK receipt-scanning cashback apps →

Paid membership cashback (advanced)

Free portals like TopCashback and Quidco cover most online retailers, but they don’t pay out on in-store supermarket shopping — supermarkets don’t pay affiliate commissions. That’s the gap paid membership programs fill.

NX Rewards and Complete Savings

These are two brand names for the same underlying cashback platform. NX Rewards is the National Express-branded version; Complete Savings is the Webloyalty-branded version. Same retailers, same mechanic, same price — £18/month after a free trial.

The friction-model catch: You pay £18/month, but you can claim that £18 back each month by submitting any qualifying receipt or completing a qualifying online purchase. Many members forget to claim — and that’s one of the ways that these platforms make their money. If you stay on top of the monthly claim then the membership is effectively free; miss a month and you’ve paid £18 for nothing.

Both programs cover the usual 1,000+ retailers (travel, hotels, fashion, electronics — Heals, Laptops Direct, NH Hotels, Antler, Barceló, Snow+Rock) at minimum 10% cashback. But another good feature is around 2% back on in-store shopping at any of their linked retailers. This includes most UK supermarkets (Tesco, Sainsbury’s, Asda, Morrisons) — something no free portal offers.

I’m an NX Rewards member. The way I use it: one weekly supermarket receipt a month is enough to trigger the £18 fee refund, and any cashback I earn on top is profit on top of that.

Full retailer lists:

• All retailers on NX Rewards
• All retailers on Complete Savings

Is it worth doing on every shop?

Honest answer: Yes and no.

It’s easy once you’ve set everything up. But depending how far you went stacking things, then it can get a bit tedious for smaller shops. The shops I always combine methods on:

• Weekly grocery shops (£60–120) — every week.
• Anything at Boots — the 7% Airtime offer alone makes it worth opening the apps.
• Big online purchases (£100+) — phones, holidays, insurance switches, mobile contracts.

For everything else I just tap the cashback debit card and move on.

Tools and rate comparisons

• Today’s supermarket gift card rates — live across EverUp, JamDoughnut, Airtime Rewards.
• Best cashback debit cards — current rates and limits.
• Complete cashback guide — start here if you’re new.