💰 Sports Betting ROI: How Much You Can Actually Win

I often get asked, "So, how much can I expect to win betting sports?" It's a great question, and there is no one-word answer to it. What there is, is a range, and the range is knowable.

Most people think sports betting is easier than it is. How hard can it be if you follow sports closely? The reality is that winning is very hard. It is a game of small edges that takes discipline, and most people do not understand how variable the results are. You can win. You can also lose, and lose a lot.

Nobody can tell you with certainty how many bets you will win or lose over a season. But on 25 years and more than 89,000 documented picks, I can tell you the shape of what is likely.

🎯 First, the number you have to beat

Sportsbooks take a commission for the privilege of betting with them. Vegas was not built by offering even odds. That commission, the vig or the juice, typically runs 10% of your bet size, so at 10% juice you risk $110 to win $100. To overcome it you have to win more than 52.38% of your bets to show a profit.

A realistic win rate over a full year is probably somewhere in the 50% to 54% range. So the whole thing plays out inside a window about four points wide, with break-even sitting near the middle of it.

What that number does not tell you is how far a given bet already sits from break-even before you do anything at all. Some spots on the board start within a fraction of it. Some start six points below.

📊 You will not hit 54%

Here is what the return looks like on either side of that number. Assume 3,500 bets over a year, a 10% vigorish, and risking 1.5% of your bankroll on each bet. I call the result Return on Bankroll: net winnings or losses divided by what you set aside to invest for the period.

Those numbers may surprise you. Your first thought is probably that hitting over 54% is likely. It is not. But the other lesson in that table is that a very modest win percentage makes a lot of money and puts the stock market to shame.

The stock market has historically returned about 7% a year, so $10,000 invested at the start of an average year is $10,700 at the end of it. Hitting 51.4% costs you the whole bankroll. Hitting 52.5% returns 12%. Hitting 53.0% over 3,500 bets returns 62%, about nine times as much.

Let me repeat that. Hitting 53.0% on 3,500 sports bets in a year is a 62% profit, nine times the stock market.

One asterisk belongs on those multiples. The 7% figure is the inflation-adjusted stock market return, and the betting numbers are not adjusted for inflation, so the real gap is narrower than the raw multiples make it look.

🎲 What you can actually expect

Those are clean numbers at a fixed win rate, and real results do not arrive at a fixed win rate. To get at the range I used a Monte Carlo simulation, which randomizes results from an expected win percentage and average bet size, then repeats the exercise many times until the shape of the outcome distribution is clear. Same assumptions as above, with the win rate set at 52.8%.

Start with a bankroll of 100 units and risk an average of 1.5 units a bet. Win 20 units and you have made a 20% return. The most likely single outcome is winning about 42 units. Put dollars on it: at $100 a unit that is a $10,000 starting bankroll, $150 a bet, and about $4,200 won on the year.

Here is the full range.

That range is wide, and the width is the finding rather than a footnote. This is a high-variance endeavor. There will be years the bankroll finishes below where it started, and the bottom of that 95% band is worse than losing everything you put up.

⚠️ Then why not put your retirement money into it?

There are three good answers to that, and it matters that you understand all of them.

You must have an edge to expect any of the positive returns above. That is the hard part. Most sports bettors do not have one, and that is why most sports bettors lose. Getting an edge is the whole job.

An edge does not protect you from a bad run. You will catch bad luck and lose money with the better side of the bet. Elite bettors have losing stretches, and you may not want your retirement riding on which stretch you happen to be in.

Stock market variance is low and sports betting variance is very high. The simulation above contains outcomes where the bankroll is gone and then some. That does not happen to a broad, diversified index fund.

So there is a trade. Higher expected returns come with variance you have to be able to sit through, and be able to lose. I can say that about a betting bankroll. I cannot say it about a nest egg.

🛒 What half a point of line shopping is worth

How do you give yourself a better shot at the top of that range instead of the bottom? Shop your lines across several sportsbooks. Finding an extra half-point of value now and again adds one to three points to your win percentage over a season, and you have just seen what a point and a half is worth in that table.

There is a second effect and it is the larger one. Every figure above assumes a 10% vig. Shop your prices properly and you can effectively cut that to 5%, which takes the number you have to beat from 52.38% down to 51.22%. That is more than a full point of break-even handed to you for the work of opening a second account. More on line shopping here.

🧾 The cost of the picks counts too

One of my subscribers, A. Gordon, astutely pointed out that most analyses of return never calculate in the cost of a service. Everything above assumes you invest $110 to win $100. What if you pay for picks as a way to raise your win percentage? Then the cost of the service belongs on the investment side of the return calculation.

Here is the arithmetic. Say you play $150 games, a 1.5% average bet on a $10,000 bankroll, and you pay $600 for a season subscription. Say you play about 250 games over that season. Your investment per game has gone up by $2.40, which is $600 divided by 250 games. So you are investing $152.40 to win $136 on each game instead of $150 to win $136. Instead of needing 52.38% to break even, you now need 52.78%.

Those numbers move with the amount bet, the number of games, and the price of the service. But in the example above, if you believe a service raises your win percentage by about 0.4%, paying for it makes financial sense. Below that, it does not.

🏁 Reset your expectations

So let us recap. You should expect to win if you have an edge over the sportsbooks, as I have had over the years. But even with an edge you can and will lose sometimes, because sports betting involves a lot of luck. As in poker, you can get all your money in with the best of it and still lose the pot.

Bet without an edge and you will be a long-term loser. The more bets you make, the smaller the role luck plays and the more closely your results track your actual edge. Over the short run anything can happen and it can be a roller coaster, which is one reason I spread risk across a lot of games. More on variance.

The takeaway is to reset your expectations and make them reasonable. Understand the market you are actually facing. That is the first step toward becoming a winning sports bettor. The second is sizing your bets so that a bad run cannot end you.

I have documented more than 89,000 official picks since 2001, winners and losers, and posted every one of them where you can check the record. If you want to see what one looks like today, a complimentary pick lands in the Wunderdog Wire every morning.