Martin Lewis is urging Nectar Card holders to use up their points as soon as possible.
Appearing on Good Morning Britain, the 47-year-old explained how by using points now, shoppers will be able to double up on what they already have by swapping them for vouchers.
"If you’ve a stash of Nectar points, now’s a good time to use them," he said.
"Go online till 5 November, or use the Nectar app from 13 to 19 November, and you can get double the vouchers for your points – so 1,000 points will get you a £10 double up voucher instead of the usual £5."
He added: "You can spend up to £100 in double-up vouchers in Sainsbury’s stores in any of these 11 categories - cosmetics, electricals, entertainment, fragrance, gifts, homeware, seasonal goods, skincare, Taste the Difference wines, toys and Tu clothing."
It's not just the Nectar Card scheme which Martin has been dishing out advice on. Appearing on the same daytime TV, the Money Saving Expert also revealed whether or not it's worth paying £7.99 a month for the new Clubcard Plus scheme.
He told viewers: "Tesco’s launching a new Clubcard Plus subscription service on 8 November, which gives perks like discounted shopping for a monthly fee of £7.99.
"You’d also get the usual benefits of the Clubcard scheme, which won’t be changing – so you can still earn points on spending and boost them to triple their value."
Martin continued: "For most people the big benefit is the 10 percent off two shops. If you spend £80 plus over two shops every month in Tesco stores it is worth it, as your gain is the same or more than the fee – if you max it out you’ll be £32 a month up.
"Tesco has learnt from Amazon Prime that when people pay for a subscription they’re more loyal, so bizarrely it will tend to get the benefit of the subscription fee and more sticky shoppers by doing this."
