Guide · 4 min read
Your betting bankroll: how much you need and how to split it
A practical guide to sizing your bankroll, spreading it across bookmakers and an exchange, and keeping it in the right places as money moves around.
Updated 20 October 2026
Contents
Why arbing ties up capital
A sure bet needs money at two or three bookmakers at the same moment, and you never know in advance which books the next arb will involve. So your bankroll is not one pot. It is a set of balances spread across every account you use, plus some cash to move around.
That has two consequences. You need more total capital than any single bet requires, and some of it will always be sitting in the wrong place. A good split reduces how often you miss an arb because one account is empty.
Before anything else: only use money you can afford to lose. Arbitrage is low-risk, not no-risk, and value betting has real losing runs. If that is not comfortable, read our responsible gambling page first.
A worked allocation: €3,000 across 8 books and an exchange
Weight each account by how often it appears in the arbs you take. After a few weeks your bet history tells you this. At the start, a reasonable guess is to give more to the books with the broadest markets and the most outlying prices.
€3,000 bankroll, eight soft bookmakers, one betting exchange, and a cash buffer kept in your bank account.
| Account | Share of your stakes | Balance |
|---|---|---|
| Exchange | ~25% | €650 |
| Soft book A | ~14% | €350 |
| Soft book B | ~13% | €350 |
| Soft book C | ~11% | €300 |
| Soft book D | ~8% | €200 |
| Soft book E | ~10% | €250 |
| Soft books F and G | ~7% each | €175 each |
| Soft book H | ~5% | €150 |
| Cash buffer | €400 | |
| Total | €3,000 |
Shares are of the total amount you stake, so they add up to 100%, and balances roughly follow them. The exchange is on one side of many arbs, so it gets the largest balance. Small accounts still get enough for one typical leg. The €400 buffer is about 13% of the bankroll and exists only to top up accounts that run dry.
With this split, a typical arb of €300 to €400 total stake fits comfortably at most pairs of accounts. If you regularly need bigger stakes, you need a bigger bankroll, not a thinner buffer.
How turnover and profit relate
Arbitrage profit is a percentage of the money you stake, not of the money you hold. The key relationship is:
profit ≈ average realised margin × turnover
Turnover is the total amount staked in a period. Because most bets settle within a day or two, the same euro can be staked many times a month. A €3,000 bankroll can support far more than €3,000 of turnover.
The realised margin matters, not the advertised one. A scanner might show an average of 2%, but price moves, partial acceptances, voids and rounding cut into it. Assume something lower, such as 1.5%, until your own records say otherwise. The arbitrage calculator shows the margin on individual arbs.
Bankroll scenarios
These numbers are illustrations, not forecasts. They assume a 1.5% realised margin on every euro staked, about three arbs a day on 25 days a month, and accounts that are not yet limited. Your actual results depend on how many arbs you can place, which books you have, how quickly accounts get restricted and how many mistakes you make.
| Scenario | Bankroll | Accounts | Typical arb stake | Monthly turnover | Illustrative profit at 1.5% |
|---|---|---|---|---|---|
| Small | €1,000 | 5 + exchange | ~€110 | €8,000 | €120 |
| Medium | €3,000 | 8 + exchange | €400 | €30,000 | €450 |
| Larger | €10,000 | 12 to 15 + exchange | €1,000 | €75,000 | €1,125 |
The larger scenario assumes stake limits let you get €1,000 on, which is often not true at soft books. Bigger bankrolls hit limits sooner, so profit rarely scales in a straight line. Read how bookmaker limits work before planning around large stakes.
Rebalancing between accounts
Arbing moves money in one direction: winnings pile up at whichever books happened to win, and the losing books drain. Every week or two:
- Withdraw from accounts that have grown well above their target balance.
- Top up accounts that have run low from the cash buffer.
- Refill the buffer from the withdrawals once they arrive.
Withdrawal times vary from minutes to five working days depending on the book and method. E-wallets are often fastest, but some bookmakers exclude them from promotions or charge fees, and some charge for card or bank withdrawals beyond a free monthly allowance. Fees and currency conversion count against your margin, so batch withdrawals rather than making many small ones.
On an exchange, money is reusable as soon as a market settles, which is one reason it deserves a large share. See the exchanges guide.
Sizing a bankroll for value betting
Value betting is different. You are not covering every outcome, so the risk is losing runs, not money stuck in the wrong account.
Think in units. A unit is your standard stake. With flat stakes at odds around 2.00 and a 4% edge, the standard deviation over 1,000 bets is about 32 units. Losing runs of 20 to 30 units happen to bettors with a real edge. That is why a value bankroll should be at least 100 units, and more is better at higher odds.
unit = bankroll / 100 (e.g. €3,000 → €30)
If you stake with Kelly, use a fraction. Full Kelly assumes your probabilities are exact and produces painful drawdowns when they are not. A quarter Kelly with a cap of 2% to 3% of bankroll per bet is a common, sensible choice. The Kelly calculator does the sums.
Recalculate stakes from your current bankroll, not the starting figure. That way stakes shrink during a drawdown and grow only once you have earned it.