Chancellor Philip Hammond is expected to announce the new 50p (64 cents) coin during Monday's budget speech.
The words "Friendship With All Nations" are reported to appear on the commemorative coin, which is understood to be issues on March 29, the date of Britain's exit from the EU.
The news has been widely discussed on social media, by both opponents and backers of Brexit.
Labour Party lawmaker Wes Streeting hinted on his Twitter page that the new coin will be worth twice less than what it would now.
Last Budget Before Brexit
Philip Hammond's infusion is expected to tell the House of Commons on Monday the government will increase funding for the National Health Service (NHS) by 20 billion pounds a year by 2023 without raising taxes.
The Chancellor's comments on the government-led austerity policy are much awaited, following the PM Theresa May's statement during the Conservative Party conference indicated that end of austerity "is in sight."
However, according to a recent poll, the British public doesn't place much trust in the PM's words.
The Chancellor may indicate the government is not ready to ease the austerity measures in the light of a bad Brexit deal possibility. Hammond's budget statement is the last one before Brexit.