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Intelligence Brief

What's happening with AI in business: facts, primary sources, and named authors. In English, Russian, and Spanish.

Cross Industry

17 articles
Your Q3 Estimated Tax Is Due September 15. Here Is What Being Late Costs in 2026
Cross Industry

Your Q3 Estimated Tax Is Due September 15. Here Is What Being Late Costs in 2026

The third of four 2026 estimated tax payments is due Tuesday, September 15. The underpayment rate is back to 7 percent and compounds daily, but one line in the tax code makes the penalty unreachable.

Aug 31, 20266 min read4