Guides
Plain-English explainers with sources. No picks, no predictions, no advice on what to bet.
- How odds workAmerican, decimal and fractional odds, implied probability and the vig.
- How parlays workCombined odds, pushes and voids, and why long parlays are rarely hit.
- Bonus fine print explainedBonus bets, site credit, rollover and what one regulator requires.
- Taxes on winningsW-2G, withholding, records, and the 2026 loss-deduction change.
- Spot illegal offshore sitesCheck a sportsbook against your regulator's licensed list.
- Prediction markets vs sportsbooksWhat federal regulators said on Oct. 9, 2026, and what is unsettled.
- First-timer checklistWhat to check before you open an account.
See also the glossary, the calculators and the responsible gambling page.