Track maximum loss, not headline stake
| Position type | Exposure record |
|---|---|
| Back bet | Stake at risk, adjusted only for explicit refund states |
| Lay bet | Liability, not lay stake |
| Partly matched request | Liability from matched parcels only, plus any live unmatched instruction |
| Cash-out attempt | Original exposure until acceptance is confirmed |
| Hedge | Net worst outcome after every accepted position |
| Related markets | Combined worst plausible state, not each position in isolation |
Betfair's getting-started guide explains why lay exposure is liability rather than the displayed lay stake for that exchange.
Worked session ledger
Assume an illustrative affordable session-loss limit of GBP 100.
| Open position | Maximum current loss |
|---|---|
| Back position A | GBP 20 |
| Lay position B | GBP 35 |
| Related total-goals position C | GBP 15 |
| Total recorded exposure | GBP 70 |
| Remaining capacity before limit | GBP 30 |
The GBP 30 remainder is not a target to spend. A proposed position with maximum loss of GBP 40 fails the limit and should not be opened. If the positions can lose together, summing them is necessary; if a complete outcome table proves they offset, use the verified net worst state.
Six in-play betting bankroll rules
- Decide whether any gambling expense is affordable after essential costs and savings.
- Set the longer-period bankroll or entertainment budget.
- Set a smaller session maximum loss and total open-liability limit.
- Set maximum concurrent positions and decision count.
- Set the session end time and cooling-off trigger.
- Configure available account limits before kick-off.
The Gambling Commission's financial-limits standard describes customer-set limit requirements for Great Britain licensed remote operators. It does not make a chosen amount affordable or safe.
Do not count contingent money twice
A possible return is not cash. A displayed cash-out offer is not accepted cash. An unmatched lay request is not a hedge, and a winning live position can reverse before settlement. Update the ledger from accepted receipts and settled account entries.
Limits are behaviour controls, not evidence of edge
A preliminary real-time study of in-play bettors associated monetary-limit use with lower betting intensity and harms, while results for time-limit use were mixed (Addictive Behaviors). Limits can constrain exposure; they cannot turn a poor forecast or price into a favourable one.
Stop conditions
Stop new decisions when any limit is reached, records cannot be reconciled, the session extends beyond its planned end, or stake size is being considered to recover a loss. A cross-sectional Ontario study linked in-play participation with higher self-reported harms but could not establish causation (Journal of Behavioral Addictions). Use that evidence as a reason for caution, not as a universal prediction about individuals.
Continue with the broader In-Play Bankroll Management Guide for bankroll-level reconciliation beyond one session.
Continue learning
- Next guide: Lay the Draw
- Related guide: Next-Goal Betting
Assumptions and limitations
The ledger is illustrative and does not set a suitable amount for any reader. Complex related positions require a complete joint payoff table rather than simple addition. The Gambling Commission's safer-gambling guidance lists Great Britain tools and support routes. Stop gambling where it is causing financial, emotional or relationship harm.
GambleAware
GamCare
Gambling Therapy
GAMSTOP