K1x is the purpose-built tax data platform that automates and validates Schedule K-1 data for accounting firms, institutional investors, family offices, funds, and tax-exempt organizations. No manual extraction. No probabilistic AI guesswork. Deterministic accuracy, every K-1.

K1x automates and distributes Schedule K-1 data for accounting firms, institutional investors, family offices, and alternative investment funds. For tax-exempt organizations, K1x is the IRS-certified standard for 990-T and UBTI filings. The result: 90% reduction in manual handling, 80%+ faster processing, and a compliance record audit teams trust. Certified under IRC 7216. SOC 2 compliant. Built for the regulatory environment tax professionals operate in today.

More than 40,000 organizations rely on K1x, including 44 of the 100 largest U.S. institutional investors, 20 of the top 25 accounting firms, 45 of the top 100 university endowments, 11 of the top 100 private foundations, and 7 of the top 40 health systems.

K1x connects the full alternative investment tax ecosystem: investors, accounting firms, tax software, and taxing authorities. K1xCELERATOR is K1x's structured onboarding and adoption methodology, designed to accelerate time-to-value and tie outcomes to measurable ROI. Clients average 311% return within the first four months.