UK General Election Betting Guide

The United Kingdom holds a general election at least once every five years to help decide who will become the country’s Prime Minister. Candidates representing political parties stand to be elected for one of the 650 seats in the House of Commons. 326 seats are needed for a majority. Votes must be aged 18+, though this may be lowered to 16+ for the next election.

The last general election was held on 4 July 2024 and saw a landslide victory for Sir Keir Starmer and the Labour Party. Labour had been the favourites to win heading into the election and won 411 of the 650 seats available, a comfortable majority.

You can bet on various political markets with Spreadex, including the winner of the next UK general election. Read below for our betting guide, with key information and betting odds for the UK general election.

UK General Election FAQs

When is the next UK General Election?

The next general election must be held no later than 15 August 2029. Elections must take place every five years, but the current government can choose to call an election anytime up to this date. General elections usually take place on a Thursday.

Who is running in the UK General Election?

Any UK citizen* can run to be a member of parliament, but ballot papers typically feature candidates from the UK’s major political parties. Labour, the Conservative Party and the Liberal Democrats are traditionally three of the biggest parties in the UK. More recently, parties like the Green Party and Reform UK have grown in popularity.

The Scottish National Party (SNP), Plaid Cymru and Sinn Féin are also popular parties in Scotland, Wales, and Northern Ireland respectively. There are also several less mainstream parties who often have candidates at general elections, like the Monster Raving Loony Party. 

*Some people are excluded, like members of the police or armed forces, civil servants, and undischarged bankrupts.

Who is the favourite for the UK General Election?

Reform UK are the current favourites in Spreadex’s fixed odds market to win the most seats at the next general election. Led by Nigel Farage, Reform are priced at 7/4 to win the most seats for the first time in the party’s history.

How can I bet on the UK General Election?

You can find a range of political betting markets on the Spreadex website and app, including the winner of the next general election. More markets will also be released closer to the election date.

UK General Election Betting Odds

Reform UK currently have the shortest odds to win the most seats at the next general election, priced at 7/4 in our fixed odds market. Labour are the next shortest at 23/10, with the Green Party and Conservatives longer shots at 24/5 and 6/1 respectively.  Restore Britain and the Liberal Democrats can also be backed at 14/1 and 28/1 respectively.

If you’re interested in spread betting on the UK general election, check out our Politics Spread Betting Guide. You’ll find example markets, “buy” and “sell” situations and interactive widgets to help you get to grips with spread betting.

Please note that this preview is not designed to offer any betting advice or suggestions. All prices quoted correct as of 10am 11 March 2026. Price Boosts and other markets will be added closer to the tournament.