21 Hard-Earned Lessons from Tax Season 2026

And What 20 Years of Data Say Comes Next
By CPA Trendlines Research
There is a ritual to tax season. It begins with anticipation dressed as control.
Practitioners tally the risks — the IRS, the law, the clients who will not deliver on time — and tell themselves this year will be different. Then the season starts. And it isn’t.
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The CPA Trendlines Busy Season Barometer tracks that ritual across waves of surveys from September 2025 through April 2026 with more than 300 respondents.
The data show not a profession in crisis, but a profession under stress. Where pressures no longer arrive one at a time but stack up on each other. Where external shocks have been absorbed, and internal limits have come into view.
Tax season is full of noise, chaos and confusion. But a close look at the Busy Season Barometer from this year – and going back more than 20 years – can cut through the fog for the patterns, trends, insights and, most of all, the tough lessons learned.
Tax season 2026 gives us at least 21 essential takeaways.













