Boost wash rate calculator
Calculate real EV after multiple promo cycles and re-use of bonus funds
Multi-stage promo math — when winnings from boost bets can be re-deployed into another boost.
What is boost washing?
Some promotions allow recursive deployment: win a boosted bet, the winnings become regular cash, which goes into another boosted bet, and so on. Each cycle adds incremental EV beyond what a single boost calculator shows. This is the math behind professional promo abusers' real returns. Pair with Bet boost comparison for single-bet math and Matched betting kit for the basics.
Most casual bettors stop at one boost. Sharps cycle 3-5 times for compounding effect — the wash rate is the metric that quantifies this.
See also: Bet boost comparison, Matched betting kit, Free bet conversion
How to use
- 1Enter initial bet size and boost odds.
- 2Enter the % of winnings that re-qualifies for boost (e.g. 50% of payout).
- 3Enter number of wash cycles.
- 4See cumulative EV and wash rate.
Example: 3-cycle wash
Initial €100 at boosted 2.50 (true 2.10). EV cycle 1: +€40. Win pays €250, 50% (€125) requalifies for next boost cycle. Cycle 2 EV at €125: +€50. Cycle 3 EV at ~€110: +€44. Total cumulative EV ≈ €134 from a €100 starting bet — vs €40 if you stopped after one boost. Wash rate: 3.35x baseline EV.
When to use
- Multi-leg promo offers with renewable boost
- Bonus expiration cycling
- Cashback ladder promos
Frequently asked questions
What is the Boost wash rate calculator?
Some promotions allow recursive deployment: win a boosted bet, the winnings become regular cash, which goes into another boosted bet, and so on. Each cycle adds incremental EV beyond what a single boost calculator shows.
How does the Boost wash rate calculator work in practice?
Initial €100 at boosted 2.50 (true 2.10). EV cycle 1: +€40. Win pays €250, 50% (€125) requalifies for next boost cycle. Cycle 2 EV at €125: +€50. Cycle 3 EV at ~€110: +€44. Total cumulative EV ≈ €134 from a €100 starting bet — vs €40 if you stopped after one boost. Wash rate: 3.35x baseline EV.
When should I use the Boost wash rate calculator?
Multi-leg promo offers with renewable boost. Bonus expiration cycling. Cashback ladder promos.