Safety, controls and misconceptions
What's the best way to calculate total gambling cost over a month?
Direct answer
For a month with no adjustments or bonuses, net gambling LOSS = total deposits − total withdrawals + opening gambling-account balance − closing gambling-account balance. This reconciles money transferred and money still held; add outside fees only if they are not already counted. Distinguish loss from turnover (total stakes).
How to use this answer
This answer is based on the mathematical principle or published rule identified in the source below. If the question involves a live betting market, confirm its settlement definition before applying it to a specific bet.
Add deposits and all wagering-related fees, subtract withdrawals and retained balances, and reconcile against transaction history.
The priority is reliable records and practical controls rather than claims of certainty. Consider account settings, spending limits and verified support services when the question concerns money or unwanted advertising.