Level 3 · Strategy & safety · Lesson 13 of 17
Bankroll management in betting: units, staking plans and Kelly
Bankroll management means deciding in advance how much money you can afford to bet with, and then staking only a small, fixed share of it on each bet, usually 1–2% per bet. It doesn't make bets more likely to win. It stops a normal losing run from wiping you out, and it keeps betting a budgeted hobby instead of a money problem.
18+ 18+ only. Betting involves risk: never bet more than you can afford to lose. Nothing here is a guarantee of winning.
In this guide
What a betting bankroll is (and what it isn't)
A bankroll is a sum of money set aside only for betting, money you could lose completely without it affecting rent, bills, savings or your mood. It is not your current account balance, not your next pay cheque and never borrowed money.
Three rules make it a bankroll rather than just "money I bet with":
- It's separate. Ideally in its own account or e-wallet, so you can see exactly what's left.
- It's fixed in advance. You decide the amount once, when you're calm, not after a loss.
- It isn't topped up to chase losses. If it's gone, the betting stops until your next planned budget.
Most bettors lose over time because every price includes the bookmaker's margin. Good staking doesn't change that. What it does is make the cost predictable and keep a bad week from turning into a crisis.
Units: the simple way to size every bet
A unit is your standard stake, expressed as a percentage of the bankroll. Talking in units instead of pounds keeps your staking consistent and makes your results comparable over time.
| Bankroll | 1 unit = 1% | 1 unit = 2% | Bets until empty at 2% (no wins) |
|---|---|---|---|
| £200 | £2 | £4 | 50 |
| £500 | £5 | £10 | 50 |
| £1,000 | £10 | £20 | 50 |
A beginner's default: 1 unit = 1–2% of the starting bankroll, and no single bet above 2–3 units. If that feels too small to be exciting, the bankroll is probably the wrong size, not the stake.
Staking plans compared
Flat staking
You stake the same amount (say 1 unit = £10) on every bet. It's simple, easy to track and very hard to blow up with. Its weakness is that it doesn't shrink when the bankroll falls, so recalculate the unit at fixed points (for example every month), not after every result.
Percentage staking
You stake a fixed percentage of the current bankroll, so stakes shrink after losses and grow after wins. It's mathematically very hard to reach zero this way, because each stake is smaller than the last after a loss.
Kelly and fractional Kelly
The Kelly criterion stakes according to your edge: Kelly % = (b × p − q) ÷ b, where b = odds − 1, p = your win probability and q = 1 − p. It only makes sense if you have a real, measured edge (see value betting).
Odds 2.20, your probability 50%: b = 1.20, p = 0.50, q = 0.50
Kelly = (1.20 × 0.50 − 0.50) ÷ 1.20 = 0.10 ÷ 1.20 = 8.3%
On a £500 bankroll: full Kelly = £41.67, half Kelly = £20.83, quarter Kelly = £10.42
If your edge is zero (p = 0.4545 at 2.20): Kelly = (1.20 × 0.4545 − 0.5455) ÷ 1.20 = 0%, don't bet.
Full Kelly is too aggressive for almost everyone, because your probabilities are estimates and overestimating them makes Kelly overbet. A quarter Kelly with a cap of 2–3% per bet is a sensible ceiling. Work out your own figures here:
| Plan | How the stake is set | Pros | Cons |
|---|---|---|---|
| Flat | Same amount every bet | Simple, steady | Doesn't adapt to drawdowns |
| Percentage | % of current bankroll | Hard to go bust | Slow to recover after losses |
| Fractional Kelly | Edge-based % | Bigger stakes only on bigger edges | Needs honest probabilities |
| Chasing / doubling | Raise stakes after losses | None | Fastest way to lose everything |
Losing runs are normal: a worked drawdown
Even a coin flip produces long streaks. With 50/50 bets, the chance of at least one run of 8 losses in a row is about 32% over 200 bets and about 63% over 500 bets. A 10-loss run happens in roughly one in five 500-bet stretches. Your staking has to survive that.
Flat 2% (£10 per bet): 10 × £10 = £100 lost → £400 left (−20%)
Percentage 2% of current bankroll: £500 × 0.98¹⁰ = £408.54 left (−18.3%)
Percentage 10% of current bankroll: £500 × 0.90¹⁰ = £174.34 left (−65.1%)
Flat 10% (£50 per bet): 10 × £50 = £500 → £0 left
The bigger the drawdown, the harder the climb back:
| Drawdown | Gain needed to get back to the start |
|---|---|
| −10% | +11.1% |
| −20% | +25% |
| −50% | +100% |
| −65% | +186% |
That table is the whole case for small stakes. A 20% dip is annoying; a 65% dip is close to unrecoverable.
Losing runs also hit harder than they look on paper because they rarely come alone. A bad run usually brings the urge to bet more often, to raise stakes or to try markets you don't normally touch. Small, fixed units take that decision away from you in the moment: the stake was decided weeks ago, when you were calm. If your staking plan only works when you're winning, it isn't a plan. Before you start, ask yourself one question: if I lost the next 15 bets in a row, would I still be able to follow these rules? If the honest answer is no, lower the unit until it's yes.
Stop-losses and limits
A stop-loss is a line you set in advance: for example, stop for the day after −5 units, or for the month after −20% of the bankroll. It isn't there to protect profit. It protects your judgement, because decisions after a string of losses are the worst decisions most people make.
Set limits in two places:
- In your plan: daily and monthly loss limits, a maximum stake, a maximum number of bets.
- At the bookmaker: deposit limits, loss limits and time-outs. Licensed operators must offer these; see choosing a bookmaker and our list of licensed bookmakers.
Never increase stakes to "win it back". Doubling after a loss feels logical and is the quickest route to an empty bankroll. If you find yourself doing it, stop and read our responsible gambling guide.
- Choose an amount you can lose. Pick a sum that wouldn't change anything in your life if it were gone; never use savings, credit or borrowed money.
- Keep it separate. Put it in its own account or e-wallet so your betting balance is always visible.
- Fix your unit. Set 1 unit = 1–2% of the bankroll and a maximum of 2–3 units on any bet.
- Pick a staking plan. Flat or percentage staking for beginners; fractional Kelly only once you track a real edge.
- Set stop-losses and bookmaker limits. A daily and monthly loss limit in your plan, plus deposit limits in your account.
- Record every bet. Date, market, odds, stake, result and the closing price.
- Review monthly, not after every bet. Recalculate the unit on a fixed date and check whether you're beating the closing price.
Keep records: the part everyone skips
Without records you don't know your results; you only remember your wins. A simple spreadsheet is enough:
| Date | Bet | Odds | Stake | Result | Closing odds |
|---|---|---|---|---|---|
| 04/10 | Home win | 2.30 | £10 | +£13.00 | 2.10 |
| 05/10 | Over 2.5 | 1.95 | £10 | −£10.00 | 1.90 |
| 11/10 | BTTS yes | 1.80 | £10 | −£10.00 | 1.85 |
From that you can see your total staked, your profit or loss, your return on turnover (profit ÷ total staked) and whether you usually beat the closing price. After 100+ bets, these figures tell you far more than any single result. Compare your record with the public Tipnito record, which uses the same columns.
Common bankroll mistakes
- No fixed bankroll. "I'll just deposit a bit more" is how budgets disappear.
- Stakes based on confidence. Your "sure thing" is still a probability, and it's usually less likely than it feels.
- Raising stakes after a win or a loss. Both are emotional, not mathematical.
- Big accumulators on a small bankroll. Low-probability bets with high stakes produce long dry spells; see accumulators.
- Mixing betting money with everyday money. You lose track of what you've actually spent.
- Not counting bonus terms. Wagering requirements can force bets you wouldn't otherwise make; see betting bonuses.
Frequently asked questions
How much should I bet per bet?
Most experienced bettors stake 1–2% of their bankroll per bet, with a hard cap of 2–3%. On a £500 bankroll that's £5–£10 per bet. Smaller stakes let you survive the long losing runs that every bettor hits.
What is a unit in betting?
A unit is your standard stake, usually 1% or 2% of your bankroll. If your bankroll is £1,000 and 1 unit is 1%, a 2-unit bet is £20. Units make it easier to compare results and keep stakes consistent.
Is the Kelly criterion good for beginners?
Full Kelly is too aggressive for beginners because it assumes your win probabilities are exactly right. If you use it at all, use a quarter Kelly with a 2–3% cap, and only once you've tracked enough bets to know you have an edge.
How big should my betting bankroll be?
Only as big as an amount you could lose entirely without it affecting your bills, savings or wellbeing. There's no minimum: £100 with £1–£2 stakes is a perfectly good bankroll.
What should I do when I lose my whole bankroll?
Stop and don't top it up. Wait until your next planned budget, if betting still feels like entertainment. If you're tempted to deposit more to win it back, that's a warning sign; use your bookmaker's limits or self-exclusion and talk to a support service.
Nito is Tipnito’s owl and an AI-assisted editorial persona. Our editors check every guide against the rules and the maths. About Nito · How we write