CAS

Busy Season 2026: Chaos Looms as DOGE Cuts and OBBBA Changes Collide

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Downsizing and backlogs become national policy.

By CPA Trendlines Research

The Internal Revenue Service is heading into the 2026 filing season with fewer employees, more complex tax law changes, and less capacity to resolve problems when returns go wrong — a combination federal watchdogs say will leave tax professionals managing the fallout even as headline service metrics appear stable.

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National Taxpayer Advocate Erin M. Collins says most taxpayers with straightforward, electronically filed returns should see few disruptions. But she warned that the true test of the filing season will be how the IRS handles the millions of returns that require human intervention — at a time when the agency’s workforce has been cut by more than a quarter.

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The IRS in 2026: Quiet Backlogs, Harder Fixes, and Late Guidance

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Less capacity, more obligation.

By CPA Trendlines Research

Identity theft is becoming one of the biggest time drains for tax professionals this filing season, and the IRS may be less equipped than ever to handle it.

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According to the IRS Advisory Council—the body representing tax professionals—identity-theft refund cases now take nearly two years to resolve, as staffing cuts and system limits slow IRS response.

But identity theft is only one of a long list of problems that can only get worse this year. Tax professionals are bracing for prolonged client disputes and frustrating follow-ups with an understaffed, ill-equipped IRS.

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Busy Season 2026: The Year CAS Firms Seize the Lead

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Why is the busy season better for CAS accountants?

CAS Comparison: At firms where CAS is the leading fee-generator, CAS accountants are handling half the book (left) and collecting 10 times the fees (right).

By CPA Trendlines Research

With busy season 2026, accountants specializing in client accounting services are reaping the benefits of a year’s worth of hard work, in a smoother path to April 15, more compliant clients, and higher fees, according to the CPA Trendlines Busy Season Barometer.

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The Busy Season Barometer marks the 2026 tax season as the breakthrough moment when CAS crosses from merely an aspirational experiment to a routine part of the service mix for small and midsize firms.

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How to Build a Scalable CAS Practice

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cloud computing enables digital growth with secure data storage, scalable infrastructure, and strategic cloud-based business solutions

Consider delegation vs. automation.

By Hitendra Patil
Client Accounting Services: The Definitive Success Guide

Client Advisory Services (CAS) are much more than just a passing trend or buzzword. They represent a fundamental shift in how accounting firms define their value and interact with clients. Offering CAS means your firm is adopting a new approach to practicing accounting, one that changes how services are provided, how clients view your role, and how your firm builds long-term revenue. It’s not just adding another service line; it’s a strategic change shaping the future of the profession.

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According to survey insights, 59 percent of accounting firms currently offer CAS. Among these, 73 percent have been providing these services for over five years. However, for many, offering CAS and growing it are two different challenges.

The key question is no longer, “Should we offer CAS?” but:

“How can we expand CAS without adding complexity, chaos or costs?”
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Brannon Poe: Is Your Firm PE-Ready? | The Disruptors

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Most firms aren’t. Here’s how to change that.

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The Disruptors
With Liz Farr

Brannon Poe, founder of Poe Group Advisors, says the key to a successful firm transaction is fit.  

“I think having a good deal is really about having a good fit,” he says. Besides technical skills, “you have to have management styles that mesh well, you have to have client service philosophies that are aligned,” he explains.  

MORE STREAMING: Oliver: Build a Biz that Runs Without You | Daiber: Use Succession as a Growth Strategy | Cannon: Busy Season is Self-Inflicted | Carroll: When One Person Can Break the Firm |  Rampe: Build a Roadmap Even When the Road’s Not There | Chang: Killing SALY, One Agent at a Time | Vanover: 5-Star Firms Don’t Bill by the Hour | Kless: Profit Is a Result. Flourishing Is the Purpose | Whitman: Build Culture on ‘Progress,’ Not Change | Shein: No PE? No M&A? No Problem | Hood and Weber: Time to RISE | Proctor: Turn Dumb Ideas into Brilliant Solutions | Carter-Gray: How 1 Poor Review Strengthened the Firm | Hartman: Upwork to “40 Under 40” in 3 Years |

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For sellers, choosing the right buyer matters as much as the price. “I find that the sellers in particular, who keep their focus on fit and choose the right buyer, usually are the happiest with their exit.” 

The last few years have created favorable conditions for accounting firm sales, but not for everyone.  

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