In this guide
Key takeaways
- Start with the honest truth: every price includes a bookmaker's margin, so most bettors lose money over time. Bankroll management limits losses. It doesn't create profit.
- Your bankroll is money set aside purely for entertainment. Never use rent, savings, debt or money meant for someone else.
- Size bets in units, a fixed small share of your bankroll (commonly 1–2%). Small units help you survive the losing streaks that happen even at fair odds.
- Flat staking is the simplest and safest plan for most people. Avoid chasing systems like the martingale, which increase stakes after losses.
- Record every bet. A spreadsheet with stake, odds, result and running total is the only way to know what betting really costs you.
Search for "bankroll management" and you'll find plenty of promises about beating the bookies. This guide makes none. Licensed sportsbooks build a margin into every price, so as a group, bettors lose. What good bankroll management does is turn betting into a fixed, known entertainment cost, much like a monthly budget for concerts or football tickets, instead of an open-ended drain. Below you'll find how to set a bankroll, what a unit is, how the main staking plans compare, and a simple record-keeping system you can start today.
Betting is for adults of legal age in their country (18+ in Colombia). It is entertainment with a cost, not a way to make money. If betting stops being fun, see our responsible gambling tools and help guide.
Start with the honest math: the house edge
Every betting market is priced so the implied probabilities add up to more than 100%. The excess is the bookmaker's margin. Our odds conversion guide works through an example in which a three-way football market adds up to about 105.7%. In that example, a bettor who spread money across every outcome in proportion would get back about 94.6% of what they staked, whatever happened.
Colombia's own rules point the same way. Coljuegos requires licensed online operators to pay out the equivalent of 83% in prizes to registered players. That's a regulatory floor across their offering, not a figure for any single bet type, but the message is clear: the system is designed to keep part of what players stake.
Expect to lose over time. Some people have winning months, and a few skilled bettors may find occasional value, but there is no staking plan that turns a negative-expectation activity into a guaranteed profit. Anyone selling "guaranteed" picks or systems is selling something else.
Set your bankroll
Your bankroll is the total amount you're prepared to lose on betting over a set period, such as a month or a season. Treat it as already spent.
- Start from your budget, not your hopesLook at what's left after rent, food, transport, debt payments and savings. Your bankroll comes out of the discretionary part only, the same money you'd spend on going out.
- Pick a periodA monthly bankroll is easiest to manage. If it runs out before the month ends, you stop until the next month. You don't top it up.
- Keep it separateUse one licensed sportsbook account, or a separate wallet, so betting money never mixes with everyday spending.
- Lock it in with toolsSet a deposit limit equal to your bankroll in the sportsbook's responsible-gambling settings. Licensed operators in Colombia are required to offer these tools. See our responsible gambling tools guide.
If losing the whole bankroll this month would make you anxious, cause an argument at home, or tempt you to deposit more, it's too big. Make it smaller.
Units: the core of staking
A unit is your standard bet size, expressed as a percentage of your bankroll. Thinking in units keeps your stakes consistent and stops one bad decision from wiping you out.
| Bankroll | 1 unit at 1% | 1 unit at 2% | 1 unit at 5% (aggressive) |
|---|---|---|---|
| COP 200,000 | COP 2,000 | COP 4,000 | COP 10,000 |
| COP 500,000 | COP 5,000 | COP 10,000 | COP 25,000 |
| USD 300 | USD 3 | USD 6 | USD 15 |
A common guideline is around 1–2% per unit. Why so small? Because losing streaks are normal, even when nothing is wrong. Here's the arithmetic for a simple case: if each bet is a true 50/50 (and real prices are worse than that because of the margin), the chance of hitting at least one run of seven losses in a row somewhere in 100 bets is roughly 32%. If each bet only wins 45% of the time, it's roughly 50%. At 5% per unit, a seven-bet losing run costs over a third of your bankroll. At 1%, it costs 7%.
They're calculated probabilities from a simple model with independent bets and a fixed win chance, not data about real bettors. They show why streaks happen. They don't predict your results.
Staking plans compared
Flat staking
You bet the same amount (one unit) on every bet. It's simple, easy to track and hard to abuse. For most recreational bettors, it's the best choice.
Percentage staking
You bet a fixed percentage of your current bankroll, so stakes shrink as you lose and grow as you win. For example, at 2%, a COP 500,000 bankroll that drops to COP 408,000 after a bad run has a unit of about COP 8,160. Stakes shrinking automatically after losses is a built-in brake.
Confidence (variable) staking
You bet 0.5 to 3 units depending on how strongly you feel about a bet. In practice, "confidence" often tracks emotion more than evidence. If you use it, cap the maximum and review your records to see whether your high-confidence bets actually perform better.
Kelly criterion
Kelly is a formula for sizing a bet when you know your edge: f = (bp − q) ÷ b, where b is decimal odds minus 1, p is your probability of winning and q = 1 − p. If the result is zero or negative, the formula says don't bet. The catch is that it assumes you know the true probability. Bettors almost always overestimate their edge, and overestimating makes Kelly recommend stakes that are too big. That's why people who use it often bet only a fraction (half or a quarter) of the Kelly amount. For a beginner, flat staking is safer.
Martingale and chasing systems
The martingale doubles your stake after every loss so that one win recovers everything. It fails because stakes grow exponentially: after ten straight losses at a COP 5,000 starting unit, you'd have lost COP 5,115,000 in total and would need to stake COP 5,120,000 on the next bet. Real bankrolls and sportsbook limits run out long before the "inevitable" win, and the house margin applies to every bet along the way.
| Plan | Complexity | Risk of fast losses | Best for |
|---|---|---|---|
| Flat | Very low | Low | Almost everyone |
| Percentage | Low | Low | People who want stakes to shrink automatically in bad runs |
| Confidence | Medium | Medium | Experienced bettors who check their records |
| Fractional Kelly | High | Medium to high if your probabilities are wrong | Few people; needs reliable probability estimates |
| Martingale | Low | Very high | No one |
Record keeping that tells the truth
Memory is kind to winners and forgets losers. A simple log fixes that. You can use a spreadsheet, a notes app or paper. What matters is recording every bet, including the ones you'd rather forget.
| Column | What to write |
|---|---|
| Date | When you placed the bet |
| Sportsbook | Which licensed operator |
| Event and market | Competition, teams, market type (e.g., "Over 2.5") |
| Odds | Decimal price you took |
| Stake | Amount and units |
| Result | Win, loss, void or half-win |
| Profit/loss | Net amount for this bet |
| Running total | Cumulative profit or loss |
| Notes | Why you bet, and whether it was planned or impulsive |
Once a month, review three numbers: total staked, net result, and your return as a percentage of what you staked. Also count how many bets were impulsive or placed after a loss. Many sportsbooks also show your transaction history in account settings, which you can use to check your log.
Rules that protect your bankroll and you
- No chasing. Never raise stakes to win back losses. When the bankroll is gone, you're done for the period.
- Set limits before you start. Use deposit limits, loss limits and session reminders in your account settings.
- Avoid betting under the influence of alcohol, or when you're angry, bored or stressed.
- Watch combination bets. The margin multiplies with every leg, so keep them small and occasional.
- Never borrow to bet, and never use credit you can't repay this month.
- Use only authorized sportsbooks. In Colombia, check the Coljuegos list first.
- Take breaks. If betting is taking up more time or money than you planned, use a time-out or self-exclusion and talk to someone.
A useful self-check comes from Gamblers Anonymous, which publishes a free 20-question questionnaire. GA notes that most compulsive gamblers answer "yes" to at least seven of the questions. If any of this sounds familiar, our help guide lists free support across Latin America.
Frequently asked questions
What is a unit in sports betting?
A unit is your standard stake, set as a fixed percentage of your bankroll, often around 1 to 2 percent. With a COP 500,000 bankroll, a 1 percent unit is COP 5,000.
How much of my bankroll should I bet per game?
A common guideline is about 1 to 2 percent of their bankroll per bet. Small stakes help you survive losing streaks, which are normal even at fair odds. Never bet money you cannot afford to lose.
Can bankroll management make me a profitable bettor?
No. Bankroll management limits how much you can lose and how fast. Because every price includes a bookmaker's margin, most bettors lose money over time regardless of their staking plan.
Is the Kelly criterion good for beginners?
Usually not. Kelly needs an accurate estimate of your true winning probability, and overestimating it leads to stakes that are too large. Flat staking is simpler and safer for beginners.
Why is the martingale system dangerous?
It doubles your stake after every loss, so stakes grow exponentially. A modest losing streak can require enormous bets, and bankrolls and betting limits run out before the recovery win arrives.
What should I record for each bet?
Record the date, sportsbook, event and market, odds, stake, result, profit or loss, a running total and a short note on why you bet. Review the totals monthly.
Bet with a plan, or not at all
Read our guides to odds, markets and responsible-gambling tools so you always know what you're risking.
Read more guides →Sources
- Operadores de Juegos Online Autorizados por Coljuegos (payout rules) — Coljuegos
- Mathematics of bookmaking — Wikipedia
- Kelly criterion — Wikipedia
- Martingale (betting system) — Wikipedia
- 20 Questions: Are you a compulsive gambler? — Gamblers Anonymous
18+ only. This article is general information for adults and is not legal, financial or tax advice. Betting involves real risk of loss; never bet money you cannot afford to lose, and no bet, system or tip can guarantee a win. Rules and listings change, so confirm details with the official sources linked above. This article contains no affiliate links. If gambling is causing you harm, stop and reach out for support.