ContractTax is an analytics and tax toolkit for people who trade Kalshi and other prediction markets. It exists because the tools traders actually needed did not.
ContractTax is built by an active prediction-market trader, not a faceless content farm. The product started as a personal tool to answer two questions that had no good answer elsewhere: am I actually a good trader or just running hot, and how on earth do I do my taxes on this. Everything here, the guides, the calculators, the analytics, comes from genuinely needing it.
That perspective is the point. The guidance is written by someone who has stared at a Kalshi CSV in cents, hunted for a 1099-B that never came, and felt the cost of tilting after a loss. It is practitioner knowledge, not theory.
Tax content is the area where being wrong matters most, so we treat it carefully. Our tax explanations are grounded in primary sources, the Internal Revenue Code, IRS forms and instructions, and CFTC materials on how event contracts are regulated, rather than secondhand summaries.
Where the law is genuinely unsettled, and for prediction-market contracts much of it is, we say so plainly instead of pretending there is a clean answer. You will see us describe the three possible treatments (ordinary, Section 1256, and gambling) and flag exactly where reasonable professionals disagree. We would rather tell you the truth is contested than give you false certainty.
Every guide is written to be accurate, specific, and free of hype. We date each guide so you can see how current it is, we link claims to the relevant concept or tool, and we update content when rules change, such as the 2026 change to gambling-loss deductions.
We are deliberately clear about what we are not: ContractTax is educational software, not a CPA, a law firm, or a financial advisor. Our tools produce the numbers and lay out the options. The decision of which tax position to take, especially on contested questions, is one to make with a qualified professional who knows your full situation.
General tax software and generic finance sites do not understand event contracts, the cents-based CSV, the missing 1099-B, the Section 1256 debate, or the behavioral patterns specific to fast prediction-market trading. We focus on exactly this niche, which is why our coverage is deeper and more current here than broad resources that treat Kalshi as an afterthought.
Our aim is to be the most accurate, useful, and honest resource for anyone trading prediction markets, the place you check first.