Duel’s published sportsbook rules contain a ComboBoost schedule, but a schedule is not a personal bonus award. This guide addresses a specific question: which conditions must an accumulator satisfy before the listed boost can apply? The minimum selection odds are 1.50, and availability remains discretionary. Check the current sportsbook offer rather than assuming every parlay receives a boost.

The schedule associates two selections with 1.01, ten with 1.20, and twenty with 2.00. These are boost multipliers in the published rules, not deposit matching percentages or payments for registration. A longer accumulator also requires more successful predictions. Increasing the number of legs merely to reach a headline multiplier can make the underlying ticket harder to win.

Table 1. Selected points in the published schedule

The 1.50 requirement concerns market selections. A high combined price does not establish that every leg meets the threshold. For example, a hypothetical ticket containing prices of 1.30 and 4.00 has combined odds of 5.20, yet its first selection is below 1.50. This arithmetic example illustrates the check; it does not confirm that any live market or ticket is eligible.

Inspect each leg separately before acceptance. Also distinguish independent outcomes from correlated predictions. Ordinary accumulators must follow the sportsbook’s related-outcome restrictions; combining selections through a different supported feature does not automatically establish ComboBoost eligibility. The betslip and actual offer conditions must support the combination you intend to use.

Table 2. Eligibility checks before submission

The rules calculate the final bonus amount using the final odds after all selections are settled. Consequently, an estimated return shown while building a ticket is not a guaranteed credit. A settlement change can matter to the final calculation. Preserve the accepted ticket and compare its final status with the promotion rather than using a screenshot of an earlier estimate as proof of entitlement.

Cashed-out bets are excluded from ComboBoost. Before accepting a cash-out offer, compare the offered settlement with the consequences for the boost. A cash-out can settle a ticket before the event finishes, but it does not retain this bonus under the published rule. Do not assume that the original estimated boosted return remains payable as well.

Table 3. What changes the bonus assessment

Before opening an account, confirm that you are over 18, meet the legal gambling age where you live, and are permitted to use Duel there. Complete the live registration form, accept the current terms, and follow any verification requests. Account creation does not itself activate a sportsbook bonus. After signing in, inspect the actual offer and its betslip requirements before committing funds. If no qualifying promotion appears, these settlement definitions do not create one. Ask support to clarify missing eligibility, wagering, withdrawal, or expiry information before relying on an incentive.

There is no fixed cash grant or universal expiry established by this schedule. Wagering and withdrawal conditions are governed separately. Do not invent a turnover target from the multiplier itself, and do not treat the twenty-selection entry as an instruction to stake more money.

No. Availability and terms are discretionary, and the ticket must meet the actual offer conditions.

The published requirement applies to market selections, so inspect each leg rather than only the combined price.

No. The 2.00 entry belongs to the ComboBoost schedule and does not describe a deposit match.

The published rules exclude cashed-out bets from ComboBoost.

After all selections settle, using the final odds of the accumulator.

This schedule establishes no universal claim deadline. Check the actual promotion before betting.

Source check: Duel Sports Betting Rules, updated 1 September 2026, and Terms of Service, updated 27 January 2026; reviewed 5 October 2026. This guide explains conditional rules, not a guaranteed active promotion.