Martin Lewis has urged people to stock up on stamps ahead of upcoming price increases.
The finance guru issued the advice on the latest edition of ITV's Money Show Live.
The last episode of the season was a cost of living special as the price of energy bills is set to skyrocket next month.
Ofgem's price cap will rise by 54% in April due to the surging cost of wholesale gas, which will see most energy bills rise by £693.
Martin has previously branded the increase as "sickening" and has urged anyone struggling to afford their bills to seek available support.
The Money Saving Expert ended the show by alerting viewers to further price increases coming into force in April.
Martin revealed the price of stamps and prescriptions will rise from April 4 as first class stamps are going up by 10p to 95p - and 2nd class stamps will increase by 2p to 68p.
He added: "The clear rule here is stock up now on these class stamps i.e those that say first or second, not a price.
"In the past when prices went up I'd always say you could use them indefinitely, but for now you can use them until January 31, 2023.
"So buy this Christmas ' stamps now if you can do so."
Martin said people could still buy the existing stamps now, before swapping them in for the new barcoded stamps via a free scheme that will be introduced later in the year.
He added: "But if you are going to use stamps in the future, you may as well buy them in now whilst they are cheap."
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