Horse Racing Bankroll Management: The Four-Step Method

A good starting stake is 0.5% of your bankroll on each bet. That’s my own rule of thumb, not a tested formula. On a £1,000 bank it means £5 a bet, and it keeps you comfortably in the game through the dry spells that every method runs into.

By the end of this guide you will be able to set a bank, choose a stake as a percentage of it, check that stake against the longest losing run your method has produced, and follow a few simple rules that stop you raising stakes at the worst moment. It takes four steps, and the sums are simple.

Here’s why it matters. If you work out your stakes by feel, the selection is interesting, the morning’s going well, so the stake creeps up. Then a bad run hits and the stake goes up again to catch up. Eight weeks later the bankroll’s gone, and the picks get the blame. Sometimes they deserve it. But good staking keeps a method with an edge alive through a quiet patch, and bad staking can kill it. Staking can’t turn losing picks into winning ones.

Once your stake is the right size, a losing run stops being frightening. That makes it far easier to stick to your plan.

The short version

• Your bankroll is the money set aside for betting and nothing else.
• Stake a small fixed slice of it on every bet. I start at 0.5%.
• Find the longest dry spell your method has produced. That’s the most losing bets in a row.
• Check what that dry spell would cost at your stake. I like it to take no more than about a quarter of the bank.
• Never raise your stakes to chase a loss.

Contents

• What counts as a bankroll
• How big should my stake be?
• Step one: how often does my method win?
• Step two: what’s my longest dry spell?
• Step three: will my bank survive it?
• Step four: how do I stop myself getting greedy?
• What did these methods actually return?
• A worked example, start to finish
• Common bankroll mistakes and what to do instead
• What this doesn’t tell you
• Do this today
• Frequently asked questions

What counts as a bankroll

Everything else in this guide rests on one decision: how much money is your bank? Get that wrong and every stake after it is wrong too.

Your bankroll is money you have set aside for betting and for nothing else. It is not your rent, your savings or next month’s bills. It sits in its own place, ideally its own account or its own balance with your betting accounts, so you can see at a glance what it is worth today.

A good test is simple. If the whole bank vanished, would your life carry on as normal? If the answer is no, the bank is too big, and the cure is a smaller bank, not a bigger stake. Only stake what you can afford to lose.

Keep it separate and count it honestly

• Put the bank in one clear place and write down the starting figure and the date.
• Count every deposit and every withdrawal. Money you take out is no longer in the bank.
• Include balances across all your accounts when you work out the current figure.
• Don’t top it up in a panic after a bad run. A top-up changes the bank, so note it down as a new starting point.

Keeping a record also gives you the raw material for the later steps. A simple log of date, selection, price taken, stake and result is enough. Race Advisor’s bet tracking tool is one way to keep it.

How big should my stake be?

Percentage staking means every stake is a fixed slice of whatever the bank is today. Stake 0.5% of £1,000 and you bet £5. After ten losers in a row the bank is about £951, so the next stake is about £4.75. The stake shrinks when things go badly and grows when they go well, so a run of losers can never empty the bank in one go.

Many people use 0.5% to 1%. I’d begin at the bottom of that range, and I’d only move up once I’d watched my own method for a few hundred bets. Both numbers are conventions, not tested results.

How to work out each stake

The sum is one line: stake = bank x percentage. Here is how it looks with plain numbers (illustrative, not real results).

Notice that the stake is tied to the bank, never to how confident you feel about a particular horse. A bet you love and a bet you merely like get the same stake. That one habit removes a lot of the damage that mood does to a bank.

How often to recalculate

You don’t need to rework the stake after every bet. A calmer routine is to recalculate once a week, or once a month if you bet less often, and use that figure until the next check. It keeps things steady and saves you doing sums on a racecourse.

My preference is a fixed day each week. The stake then only moves when you have chosen to look at it, and never because of one result.

What about the Kelly criterion?

Some backers ask whether a mathematical formula can pick the stake for them. The best known is the Kelly criterion, which sizes a stake by how big you believe your edge is. The catch is that it needs an accurate estimate of that edge, and most of us don’t have one. If you are curious, Kelly criterion betting explains how it works, why it breaks and how to use it safely. For a first plan I’d stay with a small fixed percentage.

If you want the wider picture of how stakes can be tied to price and edge, the horse racing staking plan guide covers how to cut volatility without losing the edge. This guide stays with the simplest plan, because it is the one you can set up in ten minutes.

Step one: how often does my method win?

Before you size a stake you need to know how often your selections win. That tells you how long the dry spells are likely to be.

Here’s what Race Advisor’s database shows for three common signals. It covers every GB and Irish race from July 2013 to 14 October 2026, backed at Betfair Starting Price (SP, the exchange’s closing price) with 2% commission taken. Where two runners shared the shortest price, both count as the favourite. VDW and Race Predictor are Race Advisor’s own ratings, and Rank 1 means the runner a rating puts top in its race.

A/E is actual wins divided by the wins the prices expected. 1.00 means the market priced the signal about right. What is A/E ratio? explains it.

PR, another of Race Advisor’s ratings, puts the same horse top as the favourite in 81% of races. Its results were almost identical, so it wasn’t a separate test and I haven’t listed it.

The favourite wins about one race in three. VDW Rank 1 wins about one in five. The less often a method wins, the longer its dry spells run, so it’s worth knowing which kind you’re backing.

How to find your own win rate

If you already have a record of bets, divide your winners by your total bets. That is your win rate. If you back at different prices, the win rate alone can mislead you, because a method that backs long-priced horses will win less often and still be doing fine.

If you have no record yet, you have two honest options. Use a backtest of the method if one exists, or start with paper bets and log them as if they were real. Either way, write the win rate down with the number of bets behind it. A win rate from 40 bets tells you very little. One from several hundred tells you more, and one from thousands is better still.

Step two: what’s my longest dry spell?

Look at what actually happened rather than guessing. This is the longest run of losing bets in a row each signal produced over those 13 years.

Those are real stretches, and nothing was broken in any of them. A method that wins one time in five will, over 150,000 bets, hit a long wait at some point. The records here run to six figures, and yours will be shorter, so treat these as a fair warning of what can happen, not a ceiling.

How to find the longest losing run in your own record

1. Put your bets in date order, one per row, with a column for win or lose.
2. Add a counter column. If a bet loses, the counter is the row above plus one. If it wins, the counter resets to zero.
3. The biggest number in the counter column is your longest losing run so far.
4. Note how many bets the record covers. The longer the record, the more you can trust that number, and the more likely it is that a worse one is still to come.

The longest run you have seen is a minimum, not a maximum. A fresh method with a short record will have a short longest run, and that can lull you into staking too boldly. When your record is thin, borrow a figure from a longer backtest or build in extra room.

Real streaks can be longer than most people expect. Losing runs in horse racing shows what they look like across thousands of races, which is useful if you want to calm your expectations before a bad patch arrives.

Step three: will my bank survive it?

Now put your stake against the dry spell. This table shows the share of the bank that a run of losers takes at two stake sizes. It counts only the losers in the run, with the stake shrinking as the bank does.

At 0.5%, even VDW Rank 1’s 59-bet wait leaves roughly three quarters of the bank. At 1% it takes nearly half, which is where a lot of people start to feel it. That’s why I start at 0.5%. It’s a cautious personal convention, not something the data proves, so let your own method’s longest dry spell and your own comfort decide where you end up.

My own check, which is untested: choose a stake where your method’s longest dry spell takes no more than about a quarter of the bank. By that rule 1% suits a method like the favourite, and 0.5% suits one like VDW Rank 1.

The sum behind the table

You can check any stake yourself. Each losing bet takes the stake percentage off a bank that is already smaller, so the bank left after a run of losers is: (1 minus your stake percentage) multiplied by itself once for every losing bet.

On a spreadsheet that is =(1-stake)^losing_run. For a 0.5% stake, enter 0.005. Subtract the answer from 1 and you have the share of the bank lost. It is the same working that sits behind the table above.

Turning the quarter-of-the-bank check into a stake

You can also run it the other way round. Decide the share of the bank you are willing to see go in your longest dry spell, and find the stake that fits. Here is an example with made-up numbers (illustrative, not real results).

1. Your method’s longest losing run is 40 bets (illustrative).
2. You want that run to take no more than a quarter of the bank, so you want to keep three quarters, or 0.75.
3. Find the stake percentage where (1 minus stake) multiplied by itself 40 times comes to 0.75. A spreadsheet or calculator will do it: 1 minus 0.75 to the power of 1/40.
4. The answer is a stake of a little over 0.7% (illustrative). Round down to a tidy figure such as 0.5%, which leaves you extra room.

Always round down, never up. The sum assumes losers arrive back to back and nothing else goes wrong. Real life is messier.

Dry spells are not the only way a bank shrinks

Winners between the losers win some back, and losers don’t always arrive back to back, so a dry spell isn’t the only way a bank shrinks. A slide can run on for a long time with winners scattered through it that never quite get the bank back to its old high. That is a drawdown, and horse racing drawdowns shows how to calculate yours in three spreadsheet columns and size the bank around it.

That’s another reason I leave room. If you want to see how the bank size works in points, horse racing stake sizing sets out how to build a bank that survives the losing runs. And if you want to compare other plans, best horse racing staking plans lays them out. I’d size a simple percentage stake first.

Step four: how do I stop myself getting greedy?

In my experience, the way a bank usually goes wrong is a stake raised in the middle of a dry spell. Sooner or later every method hits one, and the urge is to bet bigger to recover faster. Don’t. Bigger stakes in a losing run use up the bank sooner, and the bank is what lets you keep playing.

Remember the win rates too. At 34.4%, two bets in three lose. At 21.6%, nearly four in five lose. The majority of bets lose even for a well-run method. If you can live with that, small stakes make it manageable, and that’s most of what keeps the bank steady. Losing runs in horse racing shows what real streaks look like.

Write your rules down before you need them

A rule you make in the middle of a bad run is a rule made by a stressed brain. Write the rules while you are calm, and keep them where you will see them. Here is a set to start from.

• The stake is a fixed percentage of the bank, and I recalculate it on a set day.
• I never raise the stake after a loss, and I never double up to get back to even.
• I only raise the percentage after a few hundred logged bets, and only if my own record supports it.
• I take the price I logged, not the price I wish I had.
• If the bank falls by the amount I set as my limit, I stop and review before I place another bet.

Set a review line, not a panic button

Pick a point at which you pause and check the method rather than carry on regardless. A good review line is a dry spell that runs well past the longest in your backtest. At that point the sensible move is to look again at the method, with a clear head and a clean log, not to stake more.

A pause is not a punishment. It is a chance to ask whether the prices you are getting match the ones you tested, whether you are following the rules, and whether the record is long enough to judge anything yet.

What did these methods actually return?

Over the same 13 years at one-unit stakes and Betfair SP after commission. One unit is one level stake, whatever you decide it is: £1, say. The margin in brackets is how far the true ROI could sit either side of the one measured, and ROI means profit divided by total staked.

So backing any of these blind at the exchange price landed between level and a few percent behind. That’s the market doing its job, and the A/E figures above say the same thing. Staking decides how long you can keep looking. It can’t change the sign of that return.

The way forward is to find something the price has wrong, test it live before you stake real money, and let the small stake carry you while you do. A live test can show you whether results are tracking your paper record, and what your own longest dry spell looks like at your real stake. It can’t prove an edge. Log the price you took and the result for every bet, keep a running A/E, and judge it only once you have a few hundred bets. If a dry spell runs well past the longest in your backtest, that’s the moment to look again.

These are 13 years of one dataset, and a different stretch could land a little differently. Race Advisor’s racecards show the ratings for each runner if you want to try one on today’s races.

A worked example, start to finish

Here is the whole method on one imagined backer. Every number in this section is illustrative, not real results.

1. Bank. Sophie sets aside £1,000 that she can afford to lose, in its own account (illustrative).
2. Stake. She starts at 0.5%, so her first stake is £5.
3. Win rate. Her method has a record of a few hundred logged bets with a win rate of about one in five (illustrative). She expects long dry spells.
4. Dry spell. Her longest losing run so far is 30 bets (illustrative). Because the record is short, she assumes a worse run could still come.
5. Check. She uses the formula from step three to see what her longest run costs at 0.5%, then keeps the answer well inside her quarter-of-the-bank limit.
6. Rules. She writes down: recalculate the stake every Sunday, never raise it after a loss, and pause and review if a dry spell runs past her longest.
7. Review. After a few hundred more bets she compares her live results with her paper record. Only then does she think about changing the percentage.

Nothing in that list needed a clever idea. It needed a bank, a number, a check and a set of rules. That is the point of the method: it is dull on purpose, because dull is what keeps a bank alive.

Common bankroll mistakes and what to do instead

Most bank problems come from a handful of habits. Each one has a simple fix.

What this doesn’t tell you

It doesn’t tell you that any of these methods will make money. The 0.5% start and the quarter-of-the-bank check are my rules and I haven’t tested them. The dry spells come from one backtest, and a longer one is possible. I used Betfair SP, and bookmaker prices usually carry a bigger margin. Only stake what you can afford to lose.

Good staking protects a bank. It does not create an edge, and it does not remove the chance of loss. If a method has no edge, a careful stake only makes the losses arrive more slowly.

Do this today

You can set the whole thing up in under an hour. Work through the list in order.

1. Decide your bank: an amount you can afford to lose, kept apart from everyday money. Write down the figure and the date.
2. Pick your starting stake: 0.5% of the bank. Work out the pound figure and write it down.
3. Find your method’s win rate and the number of bets behind it, from your log or a backtest.
4. Find the longest losing run in that record, using the counter column from step two.
5. Run the check from step three: does that run take more than about a quarter of the bank at your stake? If so, lower the stake.
6. Write your rules: fixed percentage, set day to recalculate, no raising stakes after a loss, a review line.
7. Start logging every bet with date, price taken, stake and result, in a spreadsheet or in the bet tracking tool.
8. Put a date in your diary to review after a few hundred bets, and change nothing until then.

Frequently asked questions

What percentage of my bankroll should I bet on each horse?

I suggest starting at 0.5% of the bank on each bet. Many people use 0.5% to 1%. Both are conventions, not tested results, so move up only after you have watched your own method for a few hundred bets.

How big should my horse racing bankroll be?

Use an amount you can afford to lose, kept separate from everyday money. Then check that your method’s longest dry spell would not take more than about a quarter of it at your stake. If it would, lower the stake or raise the bank.

What is percentage staking?

Percentage staking means every stake is a fixed slice of the bank as it stands today. The stake shrinks after losses and grows after wins, so a losing run cannot empty the bank in one go.

Should I increase my stake after a loss?

No. Raising stakes after a loss uses up the bank faster and is the usual way a bank goes wrong. Keep the stake tied to the bank and let it fall with the bank.

How do I find my longest losing run?

Put your bets in date order and add a counter that goes up by one on each loser and resets on each winner. The biggest number in the counter is your longest losing run so far. A short record will understate it.

Does good staking make a method profitable?

No. Staking decides how long you can keep going through a bad patch. It cannot turn a method without an edge into a profitable one.

How many bets do I need before I can judge a method?

There is no magic number, but a few dozen bets tell you very little. I would want a few hundred logged bets before judging, and the more the better.