The Birthday Statistic: Why Half of Switzerland Makes the Same Mistake

The SwissLotto jackpot stands at CHF 14.5 million . And right now, it's worth looking at a question almost no one asks: How many people would you have to share with if you win? The answer depends on your numbers. Not on your luck. A Thought Experiment. Two players. Same stake. Same draw. Both have 6 correct numbers. Player A picked birthdays: 3, 7, 12, 19, 24, 28. Player B picked a mix: 3, 19, 27, 34, 38, 41. The jackpot is CHF 14.5 million. Let's assume Player A shares with 8 other winners. Payout: CHF 1.61 million . Player B is the sole winner. Payout: CHF 14.5 million . Same probability. Same luck. Nine times less money. The scenario is constructed – the number of co winners cannot be predicted. But the mechanism behind it is real and mathematically provable. Welcome to the birthday trap. Why Are So Many Searching for "Swisslos" and "Birthday"? Try typing "Swisslos birthday numbers" or "lucky numbers birth date" into Google. You are not alone – such search queries are among the most common around SwissLotto. The reason is deeper than you think: 1. Numbers Need Meaning Checking six random numbers feels empty. Your child's birthday feels like something . Our brain seeks meaning in every coincidence – psychologists call this apophenia. With lottery numbers, this urge is particularly strong. 2. It's the Easiest Entry Point You don't need to research, calculate, or decide anything. The numbers are already there. Date of birth, wedding anniversary, children's birthdays – your ticket is ready. 3. Emotional Bond Creates Loyalty Those who have "their" numbers play them for years. This is no coincidence, but a psychological anchor. You don't want to risk that the week you skip is exactly when "your" numbers come up. 4. The Hope for Personal Luck Many believe – consciously or unconsciously – that personal data brings luck. That the universe, fate, or a higher power responds. And that's perfectly okay. This emotional connection is a big part of what makes the lottery what it is. We don't want to take that away from you. But: Precisely because so many people apply the same logic, a statistical disadvantage arises. Countless players independently arrive at the same narrow range of numbers. And those who share with many in the event of a win have less in their wallet. The solution is not to give up birthdays – but to combine them more cleverly . The Hard Statistics: The Number Field With SwissLotto, you choose 6 numbers from 42. Let's look at how birth dates affect this field: Number Range Share of Field Reachable via Birth Dates 1–12 28.6% Yes – as day and month 13–31 45.2% Yes – as day 32–42 26.2% No – not at all That's the core of the problem: Over a quarter of the number field is simply not reachable via birth dates. And numbers 1 to 12 can be derived twice – as day and month. Anyone who composes their ticket from the birth dates of themselves, their partner, and their children almost automatically ends up in the lower number range. And thus in the same zone as many others. Note on honesty: Exactly what proportion of birthday tippers there are for SwissLotto is not published by Swisslos. That the effect exists is well documented in international lottery research – we do not know the exact Swiss rate and do not claim it. What the Draw Statistics Say This is where it gets interesting. The draw itself knows no birthdays. In 4,011 official SwissLotto draws since April 7, 1979, all 42 numbers have been drawn practically equally often : Total number draws: 23,128 only numbers 1–42 are counted – for a time, draws were made from 45 numbers Expected value per number: around 551 draws Currently most frequent numbers: 36, 3, 31 – slightly above average Currently rarest numbers: 41, 37, 27 – slightly below The range between the most frequent and the rarest number is about 19% the most frequent number came up about 19% more often than the rarest . Over 46 years and over 23,000 number draws, this is completely within the normal random range – no pattern, no tendency, no "hot streak" to rely on. The key statement: Number 41 is just as likely to be drawn as number 7. But 7 is tipped by many players, 41 by significantly fewer. The Calculation Nobody Makes Your probability of winning is fixed: Prize Tier Chance 6 correct + Lucky Number Jackpot 1 in 31,474,716 6 correct without Lucky Number 1 in 6,294,943 6 correct, regardless of Lucky Number 1 in 5,245,786 These numbers never change. No matter which combination you choose. No matter which system. No matter which AI. But your expected payout changes significantly. Because the jackpot is divided by the number of winners. If your combination is played by many, you share more often. That is the only lever you have in the lottery. Not whether you win – but how many you have to share with in the event of a win . The Factor Almost Everyone Forgets: The Tax Since we're talking about transparency – let's discuss the amount that actually ends up in your account. In Switzerland, lottery winnings are tax free up to CHF 1,071,000 as of 2026 . The part above that is subject to withholding tax of 35% , which is deducted directly by Swisslos and forwarded to the Federal Tax Administration. Let's finish the example from above: Player A shared Player B alone Jackpot share CHF 1.61 million CHF 14.5 million Withholding tax 35% above CHF 1,071,000 – CHF 0.19 million – CHF 4.70 million Payout CHF 1.42 million CHF 9.80 million The withholding tax follows the same rule for both and cannot be optimized. Because the tax free amount makes up a larger part of Player A's share, the gap shrinks a little after tax – but it remains huge: almost factor 7. Part of the withholding tax can be reclaimed upon correct declaration in the tax return. The winnings are then subject to ordinary income tax. How much remains net depends on the canton, municipality, and personal situation – a tax professional, not us, can advise you on this. The Distribution Patterns: Calculated We have exactly calculated the probabilities for 6 out of 42 – not estimated, not copied: Pattern Probability Meaning Balanced even/odd 3:3, 2:4, 4:2 81.6% Four out of five draws Balanced high/low 1–21 vs. 22–42 81.6% Identical distribution All 6 even or all 6 odd 2.1% Extremely rare Number sum between 100 and 158 70.3% The "Sweet Spot" These are not marketing numbers, but combinatorially calculated values. You can verify them yourself: 6 out of 42 yields 5,245,786 possible combinations – each of which can be classified. Important: These patterns do not improve your chance of winning. Every single combination has exactly the same probability. What they do: They lead you away from the combinations that are played above average. The Practical Consequence You don't have to give up your birthdays. They have meaning, they feel right – that's part of the gaming experience. But the statistics suggest a simple adjustment: Include at least 2 numbers from the range 32–42. Your chance of winning remains identical. But the probability of sharing with many others in the event of a win decreases. That's not an opinion – that's probability theory. Additionally, the data recommends: Keep the sum in the range 100–158 covers 70.3% of all combinations Mix even and odd 81.6% of all draws are balanced Mix high and low numbers also 81.6% What the App Calculates – and What It Doesn't At lottoprognose.ch , eight mathematical methods calculate with the real draw data. The AI doesn't calculate – it explains the results to you. 8 mathematical methods in competition Frequency analysis, Poisson distribution, Markov chains, Monte Carlo controlled randomness , Bayesian statistics, Fourier cycles, regression, and the combined ensemble method. All run in parallel across the full 4,011 draws. Reweighted after every draw After each official draw, the app evaluates how well each method did – and the ensemble method adjusts its mix for the next forecast. Automatically, without you having to do anything. Open formulas With a premium account, you can view each of the 8 formulas individually. We hide nothing. AI explanation at the touch of a button For every forecast, you can have it explained in simple terms why exactly these numbers were calculated – with the real frequencies and your personal factors. One thing the methods don't check, though: whether a combination sits in the birthday zone. So make sure yourself to include at least 2 numbers from the range 32–42 – that way, you keep the personal connection to your numbers without falling into the birthday trap. Honestly Speaking We cannot help you win the jackpot. No one can – not even an AI. The chance remains 1 in 31,474,716, no matter what you do. What we can do: Show you how to share as little as possible in the unlikely event of a win . That's a small advantage – but it's the only one that exists. And it's mathematically proven. If you already play, you should use it. → Get your forecast now – at lottoprognose.ch https://lottoprognose.ch Same chance. Better payout. Note: Choosing numbers does not change the probability of winning – this is fixed at 1 in 31,474,716 6 correct + Lucky Number or 1 in 6,294,943 6 correct without Lucky Number . The tips in this article refer exclusively to the expected number of co winners, not to the probability of a hit. All probability information on distribution patterns was calculated combinatorially for 6 out of 42. The number of evaluated draws 4,011 refers to official Swisslos data since April 7, 1979. Information on withholding tax corresponds to the current status tax free up to CHF 1,071,000, 35% on the part above; as of 2026 and does not replace tax advice. Gambling can be addictive – play responsibly. Help: 0800 040 080 SOS Spielsucht, in German .