ChamTax
ChamTax calculates estimated post-tax take-home payouts for Powerball and Mega Millions jackpots across 21 tax-residency countries.
Open productWhat it does
About ChamTax
ChamTax (참택스) is a free tax calculator designed for US lottery jackpots, specifically covering Powerball and Mega Millions payouts. It allows users to estimate their actual take-home winnings based on their country of tax residency, with comparative payout data spanning 21 countries. The platform supports calculations for both lump-sum payments and 30-installment annuity schedules, as well as per-person post-tax breakdowns for shared jackpots with multiple winners. Operating as a static site on GitHub Pages with no backend server, ChamTax does not store personal data and does not serve as a purchasing agent or brokerage.
- Availability:
- launched
- Access:
- free
- Format:
- software
- Platform:
- web
Pricing at launch: Free calculator with no personal data storage.
Core capabilities
Residency-Based Tax Calculation
Calculates net jackpot take-home payouts based on the user's tax-residency country across 21 supported nations.
Payout Schedule and Split Winnings
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