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By Solon Angel

"Very tedious." That is how a partner at a multi-family-office wealth firm described the workflow her team uses every quarter to push estimated payments out the door for high-net-worth households spread across most of the country. Not "annoying." Not "we are working on it." Tedious. The kind of word people use when they have stopped pretending the problem is going to fix itself.

What was happening when she said it tells you everything about where firms break. Her team keeps an estimated-payment register inside Salesforce. Then, every quarter, staff manually log into the IRS site and a dozen state portals to schedule hundreds of payments by hand. That setup worked when the book was smaller. It does not work now. She tied the need for automation directly to whether the firm can keep growing without adding proportional headcount. That is not a software wish list. That is a partner staring at her growth curve and seeing it strangled by her own quarterly cadence.

This is the quiet pattern in 2026. The first few hundred clients can absorb manual estimated payments. Somewhere past that, the math turns on you. A partner at a multi-state regional firm told us roughly three-quarters of one of his books files across multiple jurisdictions. He said individual clients regularly have payments due across five, seven, fourteen, fifteen states. He called the quarterly coordination "confusing" and "cumbersome." Sometimes departments of revenue have to help his team unwind misapplied client payments that landed under the wrong EIN. That is not a vendor problem. That is a workflow problem that has metastasized into a state-agency problem.

It is not US-specific either. A mid-size Canadian firm working corporate clients with cross-border obligations described setting up current taxes plus twelve future monthly payments for every corporate client, because the local banks will not allow recurring tax payments. Partners told us they spend ten to thirty minutes per client meeting walking the client through bank portals. Multiply that by a book of corporate clients and tell me where the partner finds time to do the work the client actually pays for.

Three different firms. Three different geographies. Same break point. The estimated-payment last mile is where good firms quietly snap under their own growth.

The macro picture is moving the same direction. Thomson Reuters is openly framing 2026 as the year firms move off cobbled-together standalone tools into integrated ecosystems where data flows from intake to delivery to payment. Translation: the last mile that tax software never actually owned now has to plug in or get left behind. TaxPlanIQ just announced it is building quarterly estimated payment calculations and multi-scenario modeling into its projections product. When new entrants treat estimated payments as a feature category, that tells you the market has decided this is no longer a niche. And the IRS is closing the back door. Treasury began phasing out paper checks for federal payments on September 30, 2025, and the full transition to digital is expected by late 2026. The manual fallbacks firms have been quietly leaning on for years are about to be removed by executive order.

Here is what I keep telling people. The story is not that firms suddenly want automation for the dopamine of it. The story is that the inputs they used to absorb manually are growing faster than headcount, and the regulatory floor under the manual workaround is being pulled out from under them at the same time. The partner who said "very tedious" was not asking for a tool. She was factually stating the boundaries her firm can operate within. The job is to build inside those boundaries, not to argue with them.

I am spending most of my time right now with founders and partners who are trying to do the right math on this before Q1 hits. The ones moving fastest are not the ones with the biggest budgets. They are the ones who looked at one quarter's payment log and admitted they had outgrown their own process.

Solon Angel is the Co-Founder and CEO of Remitian, the tax payment infrastructure platform for accounting firms, banks, and their clients.

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