King Charles £5 and £20 notes could sell for up to £20K according to expert

The first bank notes featuring the face of King Charles are in circulation, and are expected to sell for a lot more than their literal value.

The King, who was coronated in May last year, features on the new £5, £10, £20 and £50 notes.

And it turns out that if you're one of the lucky ones to get your hands on one of the notes before we all have them in our purses, you could be set to make a very pretty penny indeed.

Collectors have their beady eyes on some specific notes and a forthcoming auction is set to see sellers make thousands in profit.

This is Money informed the Daily Mail about what we should be looking out for on the notes - and it all comes down to serial numbers.

You could be set to make a very pretty penny indeed. (DANIEL LEAL/AFP via Getty Images)

It's been confirmed that the first ever printed notes featuring King Charles have the serial numbers CA 01 000001 (£5), HB 01 000001 (£10), EH 01 000001 (£20) and AJ 01 000001 (£50).

The first two £5 notes with serial numbers CA01 000001 and CA01 000002 are actually in the possession of King Charles and Queen Camilla - so you won't find those.

It is considered to be incredibly rare to come into contact with a note with any serial number below 20.

Some notes are being flogged on eBay with people bidding hundreds of pounds.

Auctioneers Spink & Son have revealed that a £5 note with an 'unprecedentedly low' serial number is on sale at their auction on 13 June.

It bears the serial number CA01 000003.

King Charles features on our new bank notes. (Rasid Necati Aslim/Anadolu via Getty Images)

It's one of the lowest serial number bearing notes ever sold at auction and is expected to sell for anywhere between £3,000 and £5,000.

But some experts have suggested it will make much more.

Simon Narbeth of bank note seller Colin Narbeth & Son said: "Without a doubt this note will sell for at least £13,000, if not more.

"This is the lowest serial number for a £5 note to be auctioned since a £5 note presented to former Prime Minister Harold McMillan in 1957 was auctioned in 2021, which also had the serial number 01 000003.

"That note sold for £22,000 at auction."

It is considered to be incredibly rare to come into contact with a note with any serial number below 20. (Rasid Necati Aslim/Anadolu via Getty Images)

If note auctioning is your thing (we don't judge), the Bank of England has more charity auctions happening this summer.

Narbeth says the one set to take place on the 27 June is 'even more exciting' as it includes a note with an even lower serial number.

HB01 000002 will be put to auction - and it'll make an eye watering amount, with Narbeth estimating that it'll go for £20,000.

Better get checking your notes!