Transparency is fundamental to our credibility. Below is the complete methodology we use to calculate the True Bonus Value for every casino in our rankings. Every variable, assumption, and formula is documented so you can verify our work independently.
We document the exact terms of the welcome bonus: match percentage, maximum bonus amount, number of qualifying deposits, free spins included, and any bonus codes required. We verify these terms directly from the casino's promotions page and terms and conditions document, noting the date of verification.
We multiply the bonus amount by the wagering requirement multiplier to determine the total wagers needed. For multi-deposit bonuses, we calculate each tier separately and then sum them. Example: a $500 bonus at 25x = $12,500 in total required wagers.
We survey the casino's pokie library and calculate a weighted average RTP based on the games that contribute 100% to wagering. We weight by popularity where data is available, and default to a straight average across confirmed RTPs otherwise. This average typically falls between 96.0% and 96.6% depending on the casino's provider mix and library composition.
Expected Loss = Total Wager Required × (1 - Average RTP). This represents the amount the house edge is expected to extract from your play during the wagering period. For a $12,500 wagering load at 96.5% average RTP, the expected loss is $12,500 × 0.035 = $437.50.
For each free spin, we estimate the expected value based on the assigned game's RTP and the bet size per spin (typically $0.20 to $0.50). Free spin winnings are further discounted by their own wagering requirements if applicable. Our per-spin estimates range from $0.18 to $0.25 after all adjustments.
The bonus amount itself acts as a bankroll buffer during wagering. Using probability modelling, we estimate how much of the bonus balance typically survives the wagering process based on the relationship between bonus size, wagering load, bet sizing, and game variance. This carry-over estimate accounts for the fact that players are not wagering their own deposit first — the bonus extends their runway.
For bonuses with tight expiry windows, we apply a time-completion discount that reflects the probability a typical player will fail to complete the wagering requirement within the allotted time. A 30-day window on a $12,500 wagering load receives no discount. A 10-day window on $40,000 receives a 20% discount. We calibrate this based on average playing sessions of 1 to 2 hours per day with moderate bet sizing.
If a casino caps the maximum withdrawal from bonus winnings, we adjust the True Bonus Value to reflect scenarios where the cap would limit returns. For most players, withdrawal caps are not binding, but in high-variance outcomes, they effectively reduce expected value. We apply a small discount proportional to the probability of exceeding the cap.
The final True Bonus Value is: Bonus Amount - Expected Wagering Loss + Free Spin Value + Carry-Over Estimate - Time Discount - Cap Discount. We rank all casinos from highest to lowest True Bonus Value and publish the results alongside the full calculation breakdown for each casino.
Our methodology produces an expected value — a statistical average outcome. Individual results will vary due to the inherent variance in casino games. A player may clear a bonus and withdraw significantly more or less than the True Bonus Value. Our figure represents the mathematically expected outcome over a large number of attempts, not a guaranteed return for any single player.
Additionally, our model assumes the player follows optimal bonus-clearing strategy (100%-weighted games, maximum feasible bet size, consistent play sessions). Players who deviate from this strategy — for example, by playing low-weight games or betting below the efficient threshold — may experience lower returns than our calculation suggests.