Guide · 8 min read
How to verify a tipster: a checklist with real numbers
A tipster shows a winning record and asks for a monthly fee. Is it skill or luck? You don't need a statistics degree to check. This guide explains which records count, why hit rate is misleading, how many bets a yield needs before it means anything, and why closing line value is a better signal than a hot streak.
Updated 22 October 2026
Contents
No timestamp, no record
Before you calculate anything you need clean data. A record is only worth something if every tip was stored with an independent party before kick-off, with odds, bookmaker, stake and time, and if losing tips can't disappear afterwards.
- Not enough: screenshots, the tipster's own spreadsheet, messages in their own Telegram channel. All of these can be edited or deleted later (see tipster scams).
- Useful: platforms that store tips with a timestamp before the event, check the quoted odds against real market prices and show the complete history, losses and breaks included.
Also check whether the quoted odds were actually available to you. A tip at 2.10 at a bookmaker that doesn't operate in Austria or Slovakia, or with a €20 stake limit, doesn't help if your bookmakers only offer 1.95.
Hit rate, yield and odds
Hit rate alone is worthless. 80% winners at average odds of 1.20 return 0.80 × 1.20 = 0.96, a 4% loss per euro staked. 40% winners at odds of 2.80 return 0.40 × 2.80 = 1.12, a 12% profit.
What matters is the yield: profit divided by the total amount staked. Our guide to ROI and yield shows how to calculate it. Make sure the record uses fixed units. A tipster who weights stakes after the fact ("I was sure about this one, 5 units") can polish any record. Our bankroll guide explains units.
And always look at the average odds. The higher the odds, the more the results swing, and the more bets you need before a yield says anything.
How many bets it takes
Every run of bets swings by chance. The question is whether the yield shown is bigger than chance alone could explain. A usable rule of thumb for the standard deviation of the yield after n bets at average odds O is:
Yield swing ≈ √(O − 1) / √n
For a yield to be reasonably unlikely to be pure luck it should be about two such swings in size (a rough 95% criterion). Rearranged: bets needed n ≈ 4 × (O − 1) / yield².
| Average odds | Yield 10% | Yield 5% | Yield 3% |
|---|---|---|---|
| 1.50 | 200 | 800 | 2,222 |
| 2.00 | 400 | 1,600 | 4,444 |
| 3.00 | 800 | 3,200 | 8,889 |
| 5.00 | 1,600 | 6,400 | 17,778 |
The table is an approximation, and a generous one, because it ignores the bookmaker's margin. But the message is clear: a tipster with average odds of 3.00 and a 5% yield needs over 3,000 documented bets before you can say with some confidence that it's more than luck. Three months with 60 tips say almost nothing. Our guide to betting variance explains why.
Worked example: 110 winners out of 200
A tipster shows 200 bets, all at odds of 2.00 with 1 unit each. 110 won, 90 lost. Profit: 110 × 2.00 − 200 = 20 units, a 10% yield.
- Assume no skill at all and a 50% chance per tip (generous, because with a margin the fair chance at 2.00 is a little below 50%).
- Expected: 100 winners. Standard deviation: √(200 × 0.5 × 0.5) ≈ 7.1 winners.
- 110 winners is only about 1.4 standard deviations above expectation. The exact binomial calculation gives roughly a 9% chance of 110 or more winners from pure luck.
Put differently: out of 100 tipsters with no skill whatsoever, about 9 show a yield of 10% or more after 200 bets. According to the table, at these odds you'd want around 400 bets at a 10% yield before the result clearly stands out from chance.
Closing line value as a quality signal
Because results swing so much, experienced bettors prefer to look at closing line value (CLV): how does the price at which a tip was given compare with the price just before kick-off? The closing price contains everything the market learned up to the start, which makes it the best available estimate of the true probability.
A tip is given at 2.10; just before the match the same bet stands at 1.95. CLV = 2.10 / 1.95 − 1 ≈ +7.7%. A tipster who beats the closing price clearly on average over hundreds of tips shows a stronger sign of skill than any short winning run.
Two catches. First, CLV needs honest timestamps, otherwise the tip price can be polished. Second, a good CLV only helps you if you get the price yourself. When hundreds of subscribers bet the same tip, the odds have often dropped before you place it; see our guide to dropping odds.
Survivorship bias: you only see the survivors
Tipsters with a poor record quit, rename their channel or simply stop advertising. The ones left are those currently having a good run. This is survivorship bias, well known from research on investment funds: looking only at the funds that still exist systematically overstates the average return.
For you that means even a properly documented record of 500 bets may be the one lucky streak among many. The more tipsters there are, the more certain it is that some look brilliant by pure chance. A long history, a plausible method and a stable positive CLV make real skill more likely, never certain.
Eight-point checklist
- Was every tip stored with a timestamp before the event by an independent party?
- Is the full history visible, including losses and breaks?
- Does the record use fixed units?
- How many bets, and at what average odds? Compare with the table above.
- Is CLV reported, and is it positive over many tips?
- Were the odds available at your bookmakers in Austria or Slovakia, and at what stake?
- Does the tipster earn from bookmaker links, in other words from your losses?
- Do they advertise with "sure", "guaranteed" or "win more"? Then the check is already over.
The same applies to your own bets: if you track your bets properly, after a few hundred you'll see in black and white whether your method holds up, instead of relying on gut feeling.
FAQ
How can I check whether a tipster is legitimate?
Only trust records stored with a timestamp before each event by an independent party, with every losing tip visible. Then compare the number of bets and average odds with how many bets a yield needs, and check the closing line value.
How many bets does a tipster record need?
Roughly 4 × (average odds − 1) divided by the yield squared. At average odds of 2.00 and a 5% yield that is about 1,600 bets; at odds of 3.00 about 3,200. A few dozen tips say almost nothing.
Is a high hit rate a good sign?
Not on its own. 80% winners at average odds of 1.20 is a 4% loss, while 40% winners at odds of 2.80 is a 12% profit. Only yield over many bets, at odds you can actually get, tells you something.
What is closing line value and why does it matter?
It compares the odds at which a tip was given with the odds just before the start. Consistently beating the closing price over hundreds of tips is a stronger sign of skill than a short winning run, as long as the timestamps are honest.
Sources
- Kaunitz, Zhong, Kreiner (2017): Beating the bookies with their own numbers, arXiv:1710.02824
- Brown, Goetzmann, Ibbotson, Ross (1992): Survivorship Bias in Performance Studies, Review of Financial Studies 5(4)
- Levitt (2004): Why are gambling markets organised so differently from financial markets?, The Economic Journal 114(495)
- NIST/SEMATECH e-Handbook of Statistical Methods, section 7.2.4: testing a proportion (binomial distribution)
As of October 2026. The sample-size formula is a rough approximation; the calculations are illustrations under the stated assumptions. Not betting advice. 18+. If betting stops being fun, free help is listed on our responsible gambling page.