Before "bankroll management units" gets an answer, the budget comes first. Every betting strategy rests on two questions: what to bet on, and how much to put on each pick. The second one decides more than most people expect. A sound bankroll and a fixed staking plan keep a bad week from ending the whole budget, while a loose one turns ordinary losing runs into real damage. What follows covers the staking side, where a plan can actually be built.
A betting strategy built on martingale doubles the stake after every loss, so that one win recovers everything lost plus the first stake. On paper the plan cannot fail; in practice a run of six or seven losses, which comes sooner than people think, asks for a stake sixty or a hundred times the first one. Table limits or the bankroll end the sequence long before the promised win arrives.
Bankroll management starts with a separate sum set aside for betting and never topped up from rent or savings. The core rules are short: decide the bankroll once, stake a small fixed share on each bet, never chase a loss with a bigger stake, and review the plan on a set day instead of after a bad result. Written down before the first bet, those rules do more for a bettor than any tip ever will.
Bankroll management units turn that share into a number. One unit is usually one or two percent of the bankroll, and every stake is counted in units: a normal pick gets one, a strong opinion perhaps two, and never ten. Counting in units makes results comparable across weeks and bet sizes, and it shows at a glance when stakes have started to drift upward after a winning or losing run.
No staking plan removes the margin built into every price; it only controls risk, so the margin stays the cost of each bet placed.
Units make results comparable across weeks, sports and bet sizes, and they show quickly when stakes have started creeping upward after a streak.
Full Kelly trusts the bettor's own probability estimate completely, and estimates tend to be too kind, so half or a quarter of the formula keeps stakes from growing too large.
From a separate sum decided once and set aside for betting only, never refilled from rent, bills or savings when it runs low.