Half of shoppers are visiting three or more grocery stores every week, Tesco says, with over a third (38%) doing so to find the best deals.
One in five (20%) of customers are willing to go five miles or more to find a good deal.
However, the survey of 2,000 UK adults also found that consumers might think they are saving by shopping around, but often end up spending more.
In fact, the supermarket said people that do this pay an extra £128.61 each month for unplanned items.
Only a third (35%) of people stick to their shopping list, with additional items costing on average £10.60 per visit.
This results in an unplanned overspend of an estimated £31billion across the UK every year, Tesco said.
Tesco says shopping at one supermarket with everything under one roof means customers can save money and time.
You might think that Tesco would say that, as a massive supermarket chain with everything under one roof.
But its advice also applies to all big supermarket chains. And if people are visiting several supermarkets to save money, Tesco’s advice most benefits the cheapest supermarkets – Aldi and Lidl.
Tesco said visiting lots of different supermarkets means almost six full days and 757 miles are spent each year on grocery shopping and associated travel time.
The research also found that if UK adults shopped for groceries once a week at a one-stop-shop, they could cut this time by 86 hours, 44 minutes and 3 seconds.
This would also save £1,543 a year on average.
Tesco chief customer officer Alessandra Bellini, said: “We know that saving money is really important to customers, but that searching out the best deals can be time consuming and sometimes costly.”
Tesco teamed up with TV personality and savvy shopping mum Kate Thornton to draw up a list of tips and tricks.
Thornton said: “We all want to save money on our everyday items, but sometimes shopping around can actually cost you more in time and money.”
Kate Thornton’s top 10 shopping tips
- Think ahead with your deals
“To stop yourself from having to put in the hours to tick off your shopping list at the lowest price, pick a store that does it all.”
- Don’t go grocery shopping when you’re hungry
“You’ll end up buying way more than you intended and will be led by your belly to overspend.”
- Batch cooking
“If you have the freezer space, cook batches of your family favourites and freeze them for those days when you don’t have time to cook from scratch.”
- Meal plan
“Meal planning might sound tedious – and unless you’re in the mood it can be, never more so than after almost 18-months of lockdown and endless cooking.
“But it will save you time and money in the long run, and also allows you to bulk buy ingredients at lower prices, or those that are on offer.”
- Work to a shopping list
“Know what you’re shopping for and stick to the list, especially if you’re working to a budget. It’s so easy to be swayed into buying unplanned items if you don’t have a list to keep you focused!”
- Prepare, compare
“Once you’ve drafted your shopping list and planned your meals ahead of going shopping, make sure you’re getting the best deals possible by using price comparisons for what you normally buy.”
- Freeze fresh produce
“I know it sounds daft, but you can freeze ginger, kale, spinach, even mashed avocado, along with loads of other fresh ingredients.
“Doing it this way, not only are you not wasting lots of good ingredients but you’re also extending their lifeline.”
- Don’t forget your loyalty card
“Loyalty schemes are one of the easiest ways to gain access to exclusive deals, rewards and savings.”
- Make your freezer work harder
“Remove packing from your groceries and freeze food in freezer bags rather than bulky boxes and packaging – you’ll be amazed how much harder your freezer can work by freeing up more space.”
- Don’t be afraid of tinned food
“It’s so easy to immediately go for the fresh items because they tend to be at the front of the shop and one of the first things you see, but often you can find just as good produce at a much lower price point if you look at the tinned food aisle.
“Our larder is packed with tinned kidney beans, chopped tomatoes, sweetcorn, chickpeas, tuna and crab.”