What does this calculator actually compute?

It estimates the expected value (EV) of a casino bonus by subtracting your expected loss during wagering from the bonus amount. EV is positive when the bonus is mathematically worth claiming and negative when wagering will cost you more than the bonus is worth.

Why does game contribution matter?

If a slot contributes only 30% to wagering, every £1 wagered counts as £0.30 toward the requirement. You actually wager 3.33x more than the headline figure suggests, multiplying your expected loss by the same factor.

Why use deployed RTP instead of theoretical?

UK operators can deploy slots at reduced RTP tiers below the published headline. The deployed RTP at your specific casino is what determines real expected loss — use the RTPTrack Deployment Tracker to verify.

Bonus EV Calculator: Is Your Casino Bonus Worth Taking?

LIVE DATA

Most casino bonuses look generous and play poorly. This calculator shows the real expected value once you account for wagering requirements, game contribution percentages, and the actual deployed RTP at your casino. A positive EV means the bonus is mathematically worth claiming. A negative EV means the wagering will cost you more than the bonus is worth.

Quick presets

Bonus amount (£)

Wagering multiplier (x)

Wagering applies to

Game contribution (%)

Check your casino's T&Cs. Casumo uses 30% for slots above 96.8% RTP.

Deployed RTP at your casino (%)

Check via the in-game info panel or search our RTP Tracker.

Results

Total wagering required

£500.00

Effective wagering

£500.00

Expected loss

£20.00

Bonus Expected Value

£30.00

This bonus is worth taking.

Formula: EV = Bonus Amount − (Effective Wagering × (1 − RTP / 100))

Results

Frequently Asked Questions

What does this calculator actually compute?

Why does game contribution matter?

Why use deployed RTP instead of theoretical?