Thinking about Thunderball and how it all fits together? With several lottery games to choose from, it helps to know the basics before you take part.
This guide explains the rules, how entries are made, what happens during each draw, and how prizes work in pounds and pence. It also covers the odds for every tier so you can see exactly what each line is playing for.
By the end, you’ll have a clear picture of Thunderball from start to finish, with simple explanations and examples that make sense at a glance.
What Are The Basic Thunderball Rules?
Thunderball is a National Lottery game with four draws a week. Each entry has two parts: you pick five main numbers from 1 to 39, plus one separate Thunderball from 1 to 14. That single Thunderball gives you access to extra prize tiers, including a payout for matching only that number.
Draws take place on Tuesday, Wednesday, Friday and Saturday evenings. The five main numbers are drawn first, then the Thunderball is drawn from its own pool. Match all five main numbers and the Thunderball to win the top prize of £500,000. There are fixed prizes for other combinations too, right down to a £3 win for matching only the Thunderball.
You must be 18 or over to take part, and entries can be made online or at authorised retailers.
Next up, let’s look at how a line is entered and the different ways to pick your numbers.
How Do I Play Thunderball And Choose Numbers?
Playing is straightforward. You can buy entries online or in-store, then choose five main numbers from 1 to 39 and one Thunderball from 1 to 14. If you prefer not to choose, the random selection option, known as Lucky Dip, will pick for you.
You can enter just the next draw or choose to play multiple upcoming draws in one go. Whether you pick the numbers yourself or use Lucky Dip, each line you submit is a separate entry with its own chance of winning.
Once the draw has taken place, results are published on official channels. Winnings are then claimed in line with how and where you bought your ticket, which we cover further below.
How Is The Thunderball Number Different From Main Numbers?
The Thunderball sits in its own pool, separate from the main numbers. You only choose one Thunderball per line, from 1 to 14, and it is drawn after the five main numbers.
Because it is independent, the Thunderball cannot also appear as one of your five main numbers in the same draw. Its key role is to unlock certain prize tiers. For example, matching the Thunderball with no main numbers still wins a £3 prize, and matching it alongside several main numbers boosts payouts at higher tiers.
Seeing how entries are priced and scheduled helps put this in context.
How Much Does A Thunderball Line Cost?
Each line costs £1, whether you enter online or in-store. If you add more lines, the price increases by £1 per line. There are no part-lines or split entries, so every selection you make is a full £1 line.
Entries close shortly before each draw, typically at 7.30pm on draw days. If you miss the cut-off, your entry rolls into the next available draw.
How Many Lines Can I Play And What Options Are There?
You can play up to seven lines on a single playslip or ticket. Each line is its own set of five main numbers plus one Thunderball, and you pay for each line you include.
There is flexibility in how you enter. You can mix your own chosen numbers with Lucky Dip lines on the same ticket, and you can opt to play in advance for multiple draws, up to four weeks at a time. Many players combine both approaches so they have a few consistent lines alongside a couple of random selections.
With your entries arranged, the next step is how the draw itself is run and checked.
How Are Winning Numbers Drawn And Verified?
Thunderball draws use mechanical machines with physical balls, operated under strict procedures. The five main numbers are selected first, followed by the Thunderball from its separate set. Independent adjudicators oversee the process to confirm it is conducted correctly.
Before each draw, the equipment and balls are tested repeatedly to ensure nothing is damaged or biased. Every number must have an equal chance of being selected. After the draw, results are recorded, checked and published through official channels and news outlets. If any issue occurs, clear rules allow for a draw to be voided and carried out again so the process remains fair and transparent.
With the draw process covered, it is easier to make sense of the odds for each prize tier.
What Are The Odds Of Winning Each Prize Tier?
Thunderball has fixed combinations with set odds for every line you enter.
Matching all five main numbers plus the Thunderball is the top prize, with odds of 1 in 8,060,598.
Matching five main numbers without the Thunderball has odds of 1 in 620,046.
For four main numbers and the Thunderball, the odds are 1 in 47,416. Four main numbers on their own is 1 in 3,648.
If you have three main numbers and the Thunderball, the odds are 1 in 1,437. Three main numbers without the Thunderball is 1 in 111.
Two main numbers and the Thunderball is 1 in 135. Two main numbers without the Thunderball is 1 in 12.
Matching one main number and the Thunderball is 1 in 35. Finally, matching only the Thunderball is 1 in 29.
Now that the odds are clear, here is what each winning combination actually pays.
Prize Breakdown By Matching Numbers
Each Thunderball prize is fixed, so the amount does not change if there are multiple winners. Here is the full list of payouts by match:
- 5 main numbers + Thunderball: £500,000
- 5 main numbers: £5,000
- 4 main numbers + Thunderball: £250
- 4 main numbers: £100
- 3 main numbers + Thunderball: £20
- 3 main numbers: £10
- 2 main numbers + Thunderball: £10
- 2 main numbers: £3
- 1 main number + Thunderball: £5
- Thunderball only: £3
With fixed prizes, you know in advance exactly what each line could return. If your numbers come up, here is how payouts work in practice.
How Are Prizes Paid Out And Claimed?
How you claim depends on where you bought your ticket. For in-store entries, most retailers pay prizes up to £100. Some can pay up to £500, although this varies. Prizes above £500 and up to £50,000 can usually be claimed at designated Post Office branches. You will need identification and your signed winning ticket.
For wins over £50,000, contact the National Lottery directly. They will complete security checks and arrange payment, typically by bank transfer.
If you played online, most prizes up to £30,000 are paid directly into your National Lottery account. For larger amounts, you will be contacted to complete checks and confirm payment details.
You have 180 days from the date of the draw to claim a prize. After that, unclaimed money is allocated to National Lottery funded projects across the UK.
How Do Thunderball Odds Compare To Other Lottery Games?
Thunderball’s top prize is £500,000, with odds of 1 in 8,060,598 for a single line. By comparison, the main prize in Lotto has odds of around 1 in 45 million, and EuroMillions is around 1 in 139 million. Those games can reach much larger jackpots, but their main prizes are harder to win.
Another difference is how prizes are set. Thunderball uses fixed amounts for each tier, so you know the payout in advance. Some other games depend on ticket sales and rollovers, which means prize values can change between draws.
If you choose to play, keep it enjoyable and set clear spend limits. Support is available at any time from GamCare and GambleAware.
*All values (Bet Levels, Maximum Wins, etc.) mentioned in relation to this game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.
**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.