The major supermarket chain has warned customers to use their Clubcard points before midnight on May 31.
Tesco-goers have until the end of the working week to save money on household groceries.
Around £17million in vouchers, valid for the past two years, still needed to be used at the beginning of this month.
Shoppers receive vouchers after they buy items from Tesco, which can be used towards a weekly shop.
Clubcard points can also be used to pay for fuel costs or secure a new deal with Tesco Mobile.
Savvy shoppers would’ve noticed they can access deals away from the supermarket’s aisles through the Clubcard scheme.
Higher value deals can be found by exchanging vouchers for double their value with 100 Clubcard Reward Partners.
PizzaExpress, Alton Towers Resort and Hotels.com are among the participating partners in the reward scheme.
More than £27million expiring codes needed to be used at the beginning of the month, according to Tesco.
This included £16million worth of rewards for days out and eating out.
The popular supermarket chain has contacted customers reminding them of the important deadline, GB News claimed.
Customers have been urged to check their Tesco Grocery and Clubcard app to see if any of their vouchers or rewards are set to expire.
Those who take advantage of the supermarket’s scheme can save around £360 annually in their shop, according to Tesco.
Earlier this month, Ashwin Prasad, Tesco’s chief commercial officer, encouraged Clubcard shoppers to use their points before it’s too late.
He said: “People across the UK will be looking forward to two Bank Holiday weekends in May and thinking about how they can make the most of them.
“Tesco Clubcard holders can use the power of Clubcard to unlock all sorts of Bank Holiday fun, from saving on their shopping when they pick up their BBQ food, or to exchanging for two times the value with 100-plus Reward Partners, offering everything from fun days out for the family to meals out at some of the UK’s most popular restaurant chains.
“With millions of vouchers expiring at the end of this month, we are urging everyone to make the most of their Clubcard this May and check to see if any vouchers or reward codes are expiring.”
It comes after Tesco revealed they’re selling a summer item for just £6 and it will help keep you cool at night.
And shoppers are racing to their nearest store after a savvy shopper spotted two deals perfect for summer.