Bankroll calculator
Set a sustainable gambling budget and calculate the right bet size for your bankroll. Based on your income, expenses, and risk tolerance.
Your budget
Rent/mortgage, bills, food, transport, debt repayments — everything you must pay.
Optional. How much you want to save each month.
Most financial advisors suggest entertainment spending (including gambling) should not exceed 10–15% of disposable income.
This calculator runs entirely in your browser. Your financial information is not stored, sent, or shared.
How the bankroll calculator works
This calculator takes a budget-first approach. Instead of starting with how much you want to bet and working backwards, it starts with what you can afford and works forwards.
The principle is simple: gambling should come from disposable income — the money left after essentials and savings. Gambling with money you need for rent, bills, or debt repayment is one of the clearest warning signs of problem gambling.
The bet sizing section uses percentage-based staking, which is the standard approach in professional bankroll management. Betting 1–2% of your bankroll per bet gives you enough runway to absorb losing streaks without going bust. Betting 10% per bet means a run of 10 losses wipes you out — and losing streaks of 10+ are more common than most people think.
Frequently asked questions
Need support?
National Gambling Helpline: 0808 8020 133 — free, confidential, 24/7. Operated by GamCare.