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Plain-text accounting insights, tutorials, and updates from the Beancount.io team.

The R&D Tax Credit: A Complete Guide for Businesses in 2026

The R&D tax credit (IRC Section 41) cuts your federal tax bill dollar-for-dollar for qualifying research expenses—yet fewer than one in five eligible businesses claim it. This guide covers the four-part test, QRE categories, the Alternative Simplified Credit calculation, and 2026 changes including restored Section 174 expensing and a $500,000 payroll tax offset for startups.