Martin Lewis ' MoneySavingExpert website has revealed when to get the biggest supermarket yellow sticker discounts.
Yellow stickers are discounted products that are approaching the end of their shelf life - but are still perfectly fine to eat.
Some stores will reduce their prices by as much as 75% - or even more - meaning shoppers can drastically cut their food bill.
On the MSE forum - which was flagged in the latest MoneySavingExpert newsletter - supermarket staff and shoppers have used their insider knowledge to point out the best time to grab yellow stickers.
As a rough guide, the first yellow stickers tend to appear mid-morning, and then reductions begin to climb towards the early evening.
What are your tips for reducing your supermarket shop? Let us know: mirror.money.saving@mirror.co.uk
But, reduction times vary not just by supermarket but by store - and it can be particularly dependent on opening times.
The website also recommends customers to look out for products that are damaged or nearing their sell-by dates.
Staff have the authority to reduce prices at their individual discretion and so it recommends approaching them with this product.
Supermarket employees on the forum unanimously agreed: “We will reduce prices for friendly customers – but if you're rude and demand a reduction, forget it.”
Another point to note is that much of the food that's reduced will be because it's close to its use-by date, so it is likely that you will need to consume fresh items quickly.
You might be able to freeze some products - read the label to check.
Asda
According to MSE, final reductions at Asda normally start around 7pm with most of them gone by 9pm.
Morrisons
Morrisons shoppers told MSE that reductions start late morning or lunchtime - however the supermarket claims it is down to store managers.
Co-op
One MSE reader said you have to wait until 8pm for 75% discounts at the Co-op.
M&S
Marks and Spencer shoppers said they've seen final reductions 30 minutes to an hour before closing.
Sainsbury's
Some MSE readers recommended looking around lunchtime for Sainsbury's yellow stickers.
Another noted that big reductions at her local store kick in around 7pm - and the supermarket says it is store dependent.
Tesco
Tesco shop floor staff told MSE that reductions start as early as 8am with bigger discounts in the early evening.
Lidl
One Lidl shopper said they have the best yellow sticker success when the shops open in the morning.
Aldi
Aldi half-price stickers start appearing from 8pm, according to MSE.
