Rules A group of contestants on each episode play a preliminary round called "Fastest Finger First". All are given a question by the host and four answers which must be placed within a particular order; in the first season of the original version (1998) and the first four seasons of the
Australian version (1999–2002), contestants have to answer a multiple-choice question. If any contestants are visually impaired, the host reads the question and four choices all at once, then repeats the choices after the music for the round begins. After time's up, the computer and the host will reveal the correct order (or the correct answer in the latter's case). The contestant who answers correctly in the fastest time goes on to play the main game. In the event that no one gets the question right, another question is given; if two or more contestants answer correctly and with the same time, they are given a tie-breaker to determine who will make a start into the game. This round is only used when a new contestant is being chosen to play the main round, and can be played more than once in an episode among those remaining within the group seeking to play the main game. In celebrity editions, the round is not used; celebrities automatically take part in the main game. Once a contestant enters the main game, they are asked increasingly difficult general knowledge questions by the host. Each features four possible answers, to which the contestant must give the correct answer. Doing so wins them a certain amount of money, with tackling more difficult questions increasing their prize fund. During their game, the player has a set of lifelines that they may use only once to help them with a question, as well as two "safety nets" – if a contestant gets a question wrong, but had reached a designated cash value during their game, they will leave with that amount as their prize. While the first few questions are generally easy, subsequent ones might prompt the host to ask if the answer they gave is their "final answer" – if it is, then it is locked in and cannot be changed. If a contestant feels unsure about an answer and does not wish to play on, they can walk away with the money they have won, to which the host will ask them to confirm this as their final decision; in such cases, the host will usually ask them to state what answer they would have gone for, and reveal if it would have been correct or incorrect.
Original format During the British original, between 1998 and 2007, the show's format focused on fifteen questions. The payout structure was as follows (questions at guaranteed levels are highlighted with a
bolded text): Between 2007 and 2014, the number of questions was reduced to twelve; the overall change in format was later incorporated into a number of international markets over a period of four years, including the Arab world, Bulgaria, the Netherlands, France, Poland, Spain, and Turkey. The payout structure, as a whole, was subsequently changed as a result, with the second safety net relocated to £50,000 at question 7 (questions at guaranteed levels are highlighted with a
bolded text): The game show's revival for British television in 2018 reverted to the original arrangement used before 2007, but with one notable difference, in that the second safety net was made adjustable – once a contestant reached £1,000, the host asked them, before giving the next question, if they wished to set the next cash prize amount as the second safety net, with this allowing them to set up as high as £500,000 in their game as a result.
American format The
American version premiered on
ABC in August 1999 as part of a two-week daily special event hosted by
Regis Philbin. After this and a second two-week event aired in November 1999, ABC commissioned a regular series that launched in January 2000 and ran until June 2002. The syndication of the game show was conceived and debuted in September 2002. The only difference between it and the British version was episode length – 45 minutes, as opposed to the 60-minute length of the original version. The change meant that the preliminary round of the show
Fastest Finger was eliminated, and contestants had to pass a more conventional game-show qualification test. After passing the qualification test and being chosen, when the show began, the host invited contestants to the studio. Exceptions to this arrangement, in which it was used under the name "Fastest Finger" included: primetime special editions of the programme; the 2004 series that was dubbed
Super Millionaire, in which the final prize was increased to $10,000,000; and for the 10th-anniversary special of the American edition, which ran during August 2009 for eleven episodes. The decision to remove this round later occurred in other international versions, including the British original, and several versions likes
Russia,
Holland and
Costa Rica before its reinstatement in the renewed series.
Clock format In 2008, the American version changed its format so that contestants were required to answer questions within a set time limit. The limit varied depending on the difficulty of the question: The clock started immediately after a question was given and the four possible answers appeared. The clock paused when a lifeline was used. If the clock ran out with no answer locked in, the contestant walked away with any prize money won up to that point, unless the "Double Dip" lifeline had been used, in which case a failure to give a second answer was treated the same as a wrong answer. This format change was later adopted into other international versions with several minor change; the British original, for example, adopted this change for episodes from 3 August 2010 to 2014. The Indian version followed suit on 11 October 2010; the Egypt version followed suit on 20 July 2012 to May 15, 2013; the Turkish version followed suit on 2 August 2011; and the Israel version followed suit between 2020–2021.
Shuffle format On 13 September 2010, the American version adopted another significant change to its format. In this change, the game featured two rounds. The first round consisted of ten questions, in which the cash prize associated to each value, along with the category and difficulty for each question, was randomised per game. As such, the difficulty of the question in this round was
not tied to the value associated to it, and a contestant did not know what amount they won unless they provided a correct answer or chose to walk away. As part of this format, the amount of money a contestant won in this round was banked, but if they walked away before completing the round, they left with half the amount that had been banked; if they gave an incorrect answer during this round, they left with just $1,000. If they answered all ten questions correctly, they then moved on to the second round, which stuck to the standard format of the game show – the remaining questions were set to general knowledge and featured cash prizes of high, non-cumulative values. The contestant could, at this point, walk away with the total amount banked from the first round; otherwise, an incorrect answer meant they left with $25,000. The format was later modified for the fourteenth season of the American version but retained the same arrangement for the last four questions. In 2015, the so-called "shuffle format" was scrapped and the show returned to a version that closely resembled the original format.
Other international formats Risk format In 2007, the
German version modified the show's format with the inclusion of a new feature called "Risk Mode". During the main game, contestants are given the choice of choosing this feature, in which if they choose to use it, they gain the use of a fourth lifeline that allows them to discuss question with a member of the audience, in exchange for having no second safety net – if they get any question between the sixth and final cash prize amount wrong, they leave with the guaranteed amount given for correctly answering five questions. This format became adopted in Austria, Czech Republic, Hungary, Italy, Philippines, Poland, Russia, Switzerland and Venezuela. Multiple variants exist of this format. One variant keeps the rule of only one safety net but lets the contestant set it before the game begins. The UK 2018 revival also has a gameplay feature often attributed to the Risk format, allowing the player 2 safety nets, but they get to set their second safety net wherever they would like after the £1,000 threshold, but they can only do it for the question coming up next before they see the question. The Taiwanese version did not have any safety nets or any option to quit; the contestant's winnings won up until they were incorrect on any question was cut by half.
Hot Seat format In November 2008, the Italian version modified the format of the show under the title (). In this variation of the game, six contestants take part, with each taking it in turns to answer questions and build up their prize fund. Utilising the time limit format introduced in the American version, this variation on the format grants a contestant the right to pass the question on to another player, who cannot pass it on themselves, while eliminating both the option of walking away from a question, and the use of lifelines. If a contestant cannot pass on or correctly answer a question, they are eliminated, and the highest cash value they made is removed. The game ends when all contestants are eliminated or the question for the highest cash value is answered – if a contestant who answers the final question gives a correct answer, they win that prize; if the final question is answered incorrectly, or the last contestant is eliminated, they win a small prize, provided they reach the fifth-question safety net. This format was later introduced to various markets over the course of a four-year-period from 2009 to 2012, including Norway, Hungary, Spain, Vietnam, Indonesia, Australia, and Chile. In 2009, the Australian version was modified to use the new Italian format, and the name was also changed from "Extraordinary Edition" to "Hot Seat". In 2017, as part of new modification to the format, the game incorporated the use of the Fastest Finger First round, with the winner able to select a lifeline, out of three that the show provided.
Gamblers' Special format In 2013, the German version modified the show's format, which runs concurrent with the original format, where only one guaranteed level exists, at €1,000, and maximum prize is €2,000,000.
Tournament format In 2025, the Italian version developed a new international format of the game show. This format turns into a tournament divided into two phases: a qualifying phase and the climb to the million. In the qualifying phase, divided into three qualifying rounds (Q1, Q2 and Q3), ten potential contestants compete against each other by answering 15 questions but having only 15 seconds to answer each question (as happened during the Fastest Finger First round in the original format). After every five questions, at the end of the qualifying round, the three with the fewest correct answers are eliminated, or, in the event of a tie, the slowest to answer. At the end of the qualifying phase, a ranking is drawn up, and only the top three (chosen based on the number of correct answers and the time taken to answer) advance to the climb to the million. The fourth place finisher acts as a reserve (in case one of the top three is incorrect within the first three questions). Once the qualifications are completed, regardless of the outcome of the game, the third-place finisher wins €2,000, the second-place finisher €3,000, and the first-place finisher €5,000 as a guaranteed prize. In the climb phase, each episode features three climbs, in order, from the slowest of the three qualified contestants to the fastest. The climb to the million consists of 10 questions ranging from a minimum of €10,000 to €1,000,000. Before the climb, each contestant can set their own intermediate goal, and in case of difficulty, each can use three aids: 50:50, Ask the Expert, and Switch the Question (from the sixth question). They also have the option to leave the game before the goal set at the start of the climb. The contestant who completes the first climb sits in the "leader's" chair, watching the progress of the next contestant, who must surpass the monetary goal reached by the previous contestant. At the end of the episode, the three contestants who reach the highest point of the climb wins, and in the event of a tie, the one who took the shortest time in qualifying wins.
Lifelines During a standard play of the game, a contestant is given a series of lifelines to aid them with questions. In the standard format, a contestant has access to three lifelines which each can be used only once per game. More than one lifeline can be used on a single question. The standard lifelines used in the original format of the game show include: •
50:50 (Fifty-Fifty) – The game's computer eliminates two wrong answers from the current question, leaving behind the correct answer and one incorrect answer. From 2000, the selection of two incorrect answers were random. •
Phone-a-Friend – The contestant is connected with a friend over a phone line and is given 30 seconds to read the question and answers and solicit assistance. The time begins as soon as the contestant starts reading the question. In the Colombian version, the timer only starts after the question has been read out. •
Ask the Audience – The audience takes voting pads attached to their seats and votes for the answer that they believe is correct. The computer tallies the results and displays them as percentages to the contestant. Many versions around the world removed this lifeline as the episodes were taped
without an audience due to the
COVID-19 pandemic. In the US, "Ask the Audience" and "Phone a Friend" had corporate sponsorship at different periods.
The original AT&T sponsored "Phone a Friend" during the original ABC primetime show and the syndicated version's first season;
the current AT&T sponsored the 2009 primetime episodes. From 2004 to 2006,
AOL sponsored "Ask the Audience" and allowed users of
Instant Messenger to participate in the lifeline by adding the
screen name MillionaireIM to their
contact list. When a contestant used the lifeline during the show, users received an
instant message with the question and the four possible answers and voted for the correct answer. The computer tallied these results alongside the results from the studio audience. Contestants pre-select multiple friends for "Phone a Friend". As soon as the contestant begins to play, producers alert the friends and ask them to keep their phone lines free and wait for three rings before answering. On 11 January 2010, the American version eliminated the use of "Phone a Friend" in response to an increasing trend of contestants' friends using
web search engines and other internet resources to assist them during the calls. Producers came to feel that the lifeline was giving contestants who had friends with internet access an unfair advantage; they also believed it was contrary to the original intent of the lifeline: friends provided assistance based on what they knew. During recordings of the current British version, security personnel from the production office stay with contestants' friends at their homes to ensure integrity. During "The People Play" specials in 2012 and 2013, friends travelled to the studio and stayed backstage. When a contestant used the lifeline, the friend they called appeared on a monitor in the studio, and both the friend and contestant were able to see and communicate with each other.
Unique lifelines During the course of the game show's history, there were a number of unique lifeline additions in various versions of the programme. These include, but are not limited, to: •
Switch the Question – Used in the American version between 2004 and 2008, and in the British original during celebrity specials between 2002 and 2003 and standard episodes between 2010 and 2014, this lifeline became available after a contestant answered the tenth question of the game. The computer replaced the current question with another of the same difficulty. The contestant could not reinstate any lifelines used on the original question. •
Three Wise Men – The other lifeline created for
Super Millionaire. When chosen, a sequestered panel of three experts (chosen by the producers) appears via face-to-face audio and video feed to provide assistance. Like "Phone a Friend", this lifeline incorporated a 30-second time limit for its use. This lifeline was also used in the Russian version between 2006 and 2008 but did not feature experts. A variation, known as
Ask the Star, which uses a panel of celebrities instead of quiz experts, was used in the final season of the Norwegian version and in the Swedish version since 2020. •
Two Wise Men – Used in the
Vietnamese version of the show from episodes broadcast since 5 May 2020, replacing "Ask Three of the Audience". It has the same function as "Three Wise Men", however there are only two experts instead of three. It becomes available after the fifth question. •
Ask the Expert – Inspired by "Three Wise Men", this lifeline provided the contestant with one person, an expert selected for them, to help with the question. Unlike its predecessor, this lifeline had no time limit on its use, but was only available after the fifth question; after "Phone a Friend" was removed in 2010, it was made readily available at any time in the game. In the US version, the lifeline was sponsored by
Skype for its live audio and video feeds. •
Plus One – Used in the American version of the show from 2015 to 2019 and from 2020 to 2021. Based on "Ask One of the Audience", the lifeline allows a contestant to invite on a friend from the audience to come and help them answer the question. There is no time limit, but after that question has been answered the friend has to return to the audience. •
Ask the Host – Used in the 20th anniversary revival of the original British version; the Danish, French and Italian revivals; Slovenia; Bulgaria (since September 2024); Russia (January 2021 – June 2022) and the 2020 reboot of the American version. When used by the contestant, the host uses their knowledge of a question's subject, gives their thoughts about the question, and tries to assist them with finding the correct answer out of the choices given. The lifeline features no time limit, and the host has no connection to the outside world or knowledge of the question and its possible answers in advance of it being shown to the contestant.
Top prize winners Out of all contestants who have played the game, relatively few have been able to win the top prize on any international version of the show. The first was
John Carpenter, who won the top prize on the American version on 19 November 1999. Carpenter famously did not use a lifeline until the final question, using his "Phone a Friend" to call his father, not for help, but to tell him he was about to become a millionaire. Other notable top-prize winners include: •
Judith Keppel was the first winner of the original British version. • In the American version, Kevin Olmstead won a progressive jackpot of $2.18 million. • In the Australian version,
Martin Flood was investigated by producers after suspicions that he had cheated, much like
Charles Ingram, but was later cleared. • In the Indian version, Sushil Kumar is often referred to in Western media as the "real-life
Slumdog Millionaire". •
David Chang was the first celebrity winner of the American version. ==Original version==