We're Paying Off Our Mortgage with Our Food Shop Cashback

Last updated: 21 May 2026

Can grocery cashback from your weekly food shop pay off your mortgage? Not entirely, no. But we've been routing our regular shop through Sprive's cashback feature for over a year, and the numbers are starting to look genuinely interesting. A percentage of every Tesco and Sainsbury's shop now goes directly off our mortgage balance. We didn't change what we buy. We didn't change where we shop. We just changed how we pay, and our mortgage is shrinking faster because of it.

By Stiv · Design, technology and personal finance

I've been using Sprive with my Nationwide mortgage since October 2021, making £100 monthly overpayments through the app. The cashback feature has been running alongside this for over a year. This post is based on real use and real numbers.

This article is for informational purposes only and does not constitute financial or mortgage advice. Cashback rates, retailer availability, and mortgage terms can change. Your home may be repossessed if you do not keep up repayments. CoolCuration is not authorised by the Financial Conduct Authority. We have a referral partnership with Sprive. Our experience and opinions are independent.

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How it works (the 60-second version)

Sprive has a cashback feature alongside its mortgage overpayment tools. You buy a digital gift card for your chosen supermarket inside the app, then use it to pay at the till. A percentage of that purchase comes back as cashback. That cashback goes directly towards overpaying your mortgage. Not into a bank account where you'd spend it on something else. Straight onto the mortgage balance.

It's the same mechanic as TopCashback or JamDoughnut, except instead of the money sitting in an account you forget about, it goes straight off your mortgage. That's the clever bit. And because mortgage interest is calculated on your outstanding balance, every pound of cashback that lands as an overpayment reduces future interest too. In other words, using grocery cashback to help pay off your mortgage creates a quiet compounding effect that builds over time.

For a deeper walkthrough of how the cashback feature works beyond just groceries, our Sprive cashback explained guide covers checkout tips, gift card pitfalls, and when it's worth the effort.

Which shops are included?

This is the make-or-break question. If your regular supermarket isn't on the list, grocery cashback through Sprive can't help you pay off your mortgage. Here's what's currently supported:

Tesco

Typically 2-4%

Sainsbury's

Typically 2-4%

Asda

Typically 2-3.5%

Morrisons

Typically 2-3.5%

M&S Food

Typically 2-4%

Waitrose

Typically 2-4.5%

Iceland

Typically 2-3.5%

Not currently supported: Aldi, Lidl, Co-op, and Ocado. If one of those is your main shop, Sprive's grocery cashback won't help you. For Aldi specifically, JamDoughnut currently offers gift card cashback.

Rates fluctuate and are only confirmed inside the app. The percentages above are indicative based on what we've seen over several months of use. Sprive advertises "up to 15% cashback" across all retailers, but that ceiling applies to promotional offers on higher-margin categories like fashion and experiences, not your weekly grocery run. Always check the app for the live rate before buying a gift card.

Beyond supermarkets, Sprive covers over 1,000 brands including Amazon, Just Eat, Deliveroo, IKEA, Argos, B&Q, Screwfix, Primark, and JD Sports. However, for this post we're focusing on the food shop because that's where the real habit lives.

The maths: what this actually saves you

So can grocery cashback genuinely help pay off your mortgage? The short answer is yes, but the amounts are modest. The long answer depends on your weekly spend, your mortgage rate, and how many years you keep it up. According to ONS Family Spending data, UK households spend an average of £70.50 per week on food and drink. A more recent Confused.com survey puts the figure at £119 per week when you include the big shop plus mid-week top-ups. The reality for most families is probably somewhere in between.

Example 1: The average household (£90/week)

Weekly grocery spend: £90

Annual grocery spend: £4,680

Average cashback at 3%: roughly £140/year to your mortgage

On a £200,000 mortgage at 4.5% over 25 years: that's approximately £2,800 saved in interest and 6 months off the term.

In other words, that's £2,800 saved from doing absolutely nothing differently except tapping a different button before you shop.

Example 2: The bigger spender (£120/week family shop)

Weekly grocery spend: £120

Annual grocery spend: £6,240

Average cashback at 3%: roughly £187/year to your mortgage

On a £200,000 mortgage at 4.5% over 25 years: approximately £3,800 saved in interest and 8 months off the term.

Example 3: The modest shopper (£50/week)

Weekly grocery spend: £50

Annual grocery spend: £2,600

Average cashback at 3%: roughly £78/year to your mortgage

On a £200,000 mortgage at 4.5% over 25 years: approximately £1,500 saved in interest and 3 months off the term.

As a result, even on a small weekly shop, the compound effect over a full mortgage term is worth having.

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Don't trust our maths? The calculator lets you plug in your own mortgage and spending. But if you're ready to start, our referral link gets you boosted cashback rates for your first 7 days.

The double-dip: how to stack even more cashback

This is the bit that most Sprive guides miss, and it's the reason we get noticeably more back from our grocery shopping than the headline rate suggests.

The trick is simple: buy your Sprive gift card first (so the cashback goes towards your mortgage), then do your actual online grocery order through a cashback link from TopCashback or JamDoughnut, and pay with the gift card at checkout. If it tracks, you earn cashback from both sources on the same shop.

Where we've tested it

We've tried this across several supermarkets. Here's what actually happened:

Tesco via TopCashback + Sprive gift card: Worked. The TopCashback cashback tracked alongside the Sprive gift card cashback. Both paid out.
Sainsbury's via TopCashback + Sprive gift card: Worked. Same result.
Ocado via TopCashback + Sprive gift card: Worked, but Ocado is expensive enough that the cashback felt like a consolation prize rather than a win.
Iceland: Didn't track. The TopCashback cashback failed.
Waitrose: Didn't track. Same issue.

Why it doesn't always work

TopCashback and Quidco track purchases via cookies and affiliate links. When you pay with a gift card instead of a regular payment method, some retailers' systems don't pass the tracking data correctly. Neither TopCashback nor Quidco explicitly exclude gift card payments in their Tesco or Sainsbury's terms, but community consensus across personal finance forums is that tracking breaks frequently.

If it works, great. If it doesn't, you'll need to submit a missing-cashback claim, which the platform can decline. As a result, don't build your entire strategy around the double-dip. Treat it as a bonus when it lands.

What always stacks reliably

Regardless of whether TopCashback tracks, these layers work every time with a Sprive gift card payment:

Loyalty cards (Tesco Clubcard, Nectar, Asda Rewards). They track your basket, not your payment method. Scan as normal.
Receipt-scanning apps (Shopmium, CheckoutSmart). They scan items on the receipt, not how you paid.
Airtime Rewards. This is card-linked, so it tracks the card you used to buy the gift card from Sprive, not the gift card itself.

The cleanest reliable stack for a Tesco shop: Sprive gift card (2-4% to your mortgage) + Clubcard scan (Clubcard prices on marked items plus points) + Shopmium receipt scan (occasional £1-3 back on branded items). No gamble, no missing-cashback claims. For more on how to layer these methods, our cashback on groceries UK guide covers the full approach.

Why grocery cashback works better when it pays off your mortgage

The question people always ask is: why not just use TopCashback and withdraw the money? You could. But here's the difference. Normal cashback from TopCashback or Quidco lands in an account. You withdraw it. You spend it. Maybe you put it towards something useful, maybe it disappears into general spending. Either way, it sits as cash until you make a decision about it.

The reason grocery cashback through Sprive is more effective at helping pay off your mortgage is that the money never touches your bank account. It goes straight onto the balance. You never get the chance to spend it on something else. It compounds silently in the background, reducing your balance, which reduces your interest, which means more of your regular payment goes to principal.

"The best financial hack is one that works while you're arguing about whether you need another bag of spinach."

As Sprive's CEO Jinesh Vohra noted in Mortgage Solutions, a single £5 cashback overpayment on a typical mortgage could be worth over £22 in the long run when you factor in the compound interest saved. That multiplier effect is what makes using grocery cashback to pay off your mortgage genuinely different from earning the same percentage through a standard cashback app.

What we've earned so far

Our total Sprive overpayments to date stand at £3,294.55. That includes both the £100 monthly auto-save and the cashback from Shop with Sprive. The cashback contribution has grown steadily as we've got into the habit of buying the gift card before every shop. Most weeks it's between £1.50 and £3.50 from Tesco alone, depending on the shop size and the live rate.

The honest answer to "can grocery cashback pay off your mortgage?" is: not alone, but it can meaningfully accelerate what you're already doing. Paired with a regular overpayment habit, it turns spending you'd do anyway into genuine progress.

"Your Tesco shop is paying off your mortgage. That sentence shouldn't make sense, but it does."

The compound effect explained

The reason grocery cashback punches above its weight when used to pay off your mortgage is compound interest avoidance. This is the same maths behind every mortgage overpayment guide we've written. When you reduce your mortgage balance, even by a small amount, less interest is charged the following month. That means more of your regular monthly payment goes towards principal rather than interest. Which means the balance drops slightly faster. Which means even less interest next month. And so on.

Small amounts, consistently applied, over a long period, produce disproportionate results. A few pounds a week from grocery cashback doesn't feel like much. Over 20 years of weekly shops, compounded against a mortgage rate of 4-5%, it adds up to thousands. Our how to pay off your mortgage faster guide covers the full strategy beyond cashback alone, and our mortgage overpayment savings calculator lets you model different scenarios.

How to set it up

Download Sprive (iOS or Android) and connect your mortgage. Our how the Sprive app works guide covers each step.
Set up your auto-save level and link your bank via Open Banking.
Before your next food shop, open the app and buy a gift card for your supermarket.
At the checkout, pay with the gift card. Scan your loyalty card as normal.
Cashback lands in your Sprive pot within about 15 minutes.
Sprive sends the accumulated cashback (and auto-save) as an overpayment to your lender.

The whole setup takes under 10 minutes. After that, the only extra step each week is buying the gift card before you shop, which takes about 30 seconds once you're used to it. Sign up via our link and you'll get boosted cashback rates for your first week:

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The honest caveats

We'd be doing you a disservice if we didn't flag the limitations.

What to expect (and what not to)

Cashback rates are small. Typically 1-4% on supermarkets. This is incremental, not transformational. It supplements your overpayment strategy rather than replacing it. We still overpay £100 a month through Sprive on top of the cashback.
Not all supermarkets are included. If you shop primarily at Aldi, Lidl, or Co-op, Sprive can't help with your grocery cashback. For Aldi, JamDoughnut is currently the best option.
Retailer anti-fraud blocks are real. Tesco in particular can throw up CAPTCHAs or reject repeat gift card purchases after 3-4 in quick succession. This is a Tesco security measure, not a Sprive bug, but it's annoying when it happens in the queue.

Trade-offs to consider

You lose credit card rewards. If you currently use a Tesco Clubcard credit card or Sainsbury's Bank credit card to earn multiplied loyalty points, paying with a Sprive gift card severs that. Work out which is worth more before switching.
You need a supported mortgage. Sprive works with most major UK lenders including Nationwide, HSBC, Lloyds, Barclays, Santander, NatWest, Halifax, Virgin Money, Yorkshire Building Society, and TSB. If your lender isn't supported, this approach won't work. Non-homeowners looking for grocery cashback should see our best cashback apps UK guide instead.
Check your overpayment allowance. Cashback overpayments still count towards your annual limit. Our Sprive overpayment rules guide explains what to check.

Ready to turn your weekly shop into mortgage overpayments?

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This article is for informational purposes only and does not constitute financial or mortgage advice. Cashback rates and retailer participation can change without notice. Mortgage overpayments are subject to your lender's terms. Your home may be repossessed if you do not keep up repayments. CoolCuration is not authorised by the Financial Conduct Authority.

FAQs

How does Sprive cashback work on groceries?

You buy a digital gift card for your supermarket inside the Sprive app, then use it to pay at the till. A percentage of the purchase comes back as cashback and is credited to your Sprive mortgage overpayment pot, typically within 15 minutes. From there, Sprive sends it to your lender as an overpayment. For the full mechanics: Sprive cashback explained.

Can grocery cashback really pay off your mortgage?

Not on its own, no. However, over 20 to 25 years of weekly shops, the grocery cashback compounds against your mortgage balance in a way that genuinely adds up. On a £200,000 mortgage at 4.5%, even £140 a year in cashback overpayments could save around £2,800 in interest and cut 6 months off your term. Using grocery cashback to help pay off your mortgage is a supplement, not a strategy.

Which supermarkets work with Sprive cashback?

Tesco, Sainsbury's, Asda, Morrisons, M&S Food, Waitrose, and Iceland are all currently supported. Aldi, Lidl, Co-op, and Ocado are not. Rates vary by retailer and fluctuate, so always check the app for the live rate before buying a gift card.

Can you double-dip Sprive cashback with TopCashback?

Sometimes. We've tested it and it worked with Tesco and Sainsbury's via TopCashback (buy Sprive gift card, then do online shop through TopCashback link, pay with gift card). However, it didn't track with Iceland or Waitrose. Gift card payments can break cashback tracking, so treat the double-dip as a bonus rather than a reliable strategy.

How much cashback does Sprive pay on supermarkets?

Typically between 1% and 4% on major supermarkets. Sprive advertises "up to 15% cashback" across all retailers, but that ceiling applies to promotional offers on higher-margin categories, not your weekly Tesco shop. Rates change, so check the app before each purchase.

Is using grocery cashback to pay off your mortgage worth the effort?

If you already shop at a supported supermarket and you have a mortgage with a supported lender, yes. The effort is minimal (30 seconds to buy a gift card before each shop) and the cashback goes somewhere genuinely useful. If you shop at Aldi or Lidl, or you don't have a mortgage, this particular approach isn't for you.

Does Sprive cashback work at Tesco?

Yes. Tesco is one of the most popular retailers on Sprive. The main thing to watch out for is Tesco's anti-fraud measures: after several repeat gift card purchases, you may get hit with a CAPTCHA or temporary block. This is a Tesco security feature, not a Sprive issue. Spacing out purchases and matching the gift card to your exact checkout total helps.

How do mortgage overpayments from grocery cashback compound?

When cashback is applied as a mortgage overpayment, it reduces your outstanding balance. Because interest is calculated on that balance, you pay less interest the following month. That means more of your regular payment goes to principal, which reduces the balance further. Over a full mortgage term, this snowball effect turns small weekly cashback amounts into thousands of pounds of interest saved.

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