2025 Tax Law Changes: The Complete Guide for Tax Professionals

The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, is the most significant tax legislation since 2017. It made the expiring 2017 tax cuts permanent, added a slate of new deductions, changed information reporting, and ended several energy incentives. This guide pulls together everything tax professionals need — each link goes to a detailed explainer.

Start here

What became permanent

New and expanded deductions

New accounts, reporting, and expirations

Turn these changes into CPE

CPE Options offers online self-study tax courses that put these rules into practice — from tax-planning strategies to estate and transfer tax. Browse Tax CPE courses →

These summaries are educational and current as of publication. Confirm the current statute, thresholds, and IRS guidance before relying on any point. Not legal or tax advice.