Stop Building Your Own Tax Payment Stack
The jurisdiction coverage map is a multi-year build most software platforms can no longer afford. Thomson Reuters paid $600M to skip it. Six recent demo calls show the rest of the market doing the same math.
By Solon Angel
The build-it-yourself era in tax software is closing. Most platform founders who think they're still in it haven't noticed yet. The ones who have are on calls with us this month asking how fast they can plug in.
Last week we sat through six conversations that all said the same thing in different accents. A founder running an early-stage tax-tech platform pulled up our website mid-call and asked to book the demo himself. No internal debate, no roadmap planning, no architectural review. He had already done the math on what owning the payment layer would cost him and decided he was not interested in finding out. A CEO of a multi-product accounting platform opened our call with "go ahead, but it won't work" and ended it by booking a demo, because he realized the jurisdiction coverage map is the part of the build he had been quietly avoiding.
A payroll platform that already processes hundreds of billions of dollars in tax payments a year told us something more interesting. They consider their own payment execution a strength. So they spent the call asking us about the layer above payments, the part that ingests changing agency rules and handles balancing and approvals, and they asked for API docs so their architects could evaluate plugging us in rather than expanding their own scope. When the firms with the deepest payment stacks in the market are looking outward for the next module, the message is not subtle.
The same week, a tax-services firm with a thousand-plus clients told us their existing payment module inside a major tax software vendor was the single thing they most wanted to replace. The lock-in is thinner than the vendors assume. Once a credible alternative shows up, the API conversation moves in minutes, not quarters.
Look at the macro picture and the same arrow shows up. Thomson Reuters paid six hundred million dollars for SafeSend to plug the last mile of their stack. The biggest incumbent in tax software just decided that even they cannot build certain workflow pieces fast enough on their own. Their 2026 outlook reads like a memo to the rest of the industry, framing next year as a structural shift away from cobbled-together standalone tools and into integrated ecosystems where data flows from intake to delivery to payment. Sovos launched a compliance network this June for exactly this reason. They are not asking platforms to build with them. They are asking platforms to stop building.
Then the regulator put a floor under all of it. Treasury and the IRS started phasing out paper federal payment instruments at the end of September last year, with the full move to digital expected by late 2026. Practitioners are being told they get one chance to enter banking data correctly. A registered investment advisory firm that used to cut paper checks straight from client accounts to the IRS reached out unprompted because the regulatory clock made the manual fallback disappear. They are not going to stand up their own electronic integrations. They are going to buy infrastructure.
There is a pattern here for any platform founder who still thinks the payment layer is a fun build. The coverage map is not a feature. It is a multi-year, multi-jurisdiction, multi-bank relationship problem. The agencies change rules without warning. Recurring payment options through local banks do not exist in half the places you need them. A Canadian CPA firm we talked to this week described it as a headache the firm is tired of, and they are the customers your platform is trying to serve.
I would stop trying to sell tax payments to platforms. I would start selling the problem they already admit they have, which is that the jurisdiction coverage map is the part of their roadmap they have been avoiding. If a client misses a payment deadline tomorrow, whose problem does that become inside your firm? That is the only question that matters, and the platforms still asking it out loud are already on the path to embedding rather than building.
The firms still trying to build it are the ones not yet on calls with us. I do not think that lasts very long.
Solon Angel is the Co-Founder and CEO of Remitian, the tax payment infrastructure platform for accounting firms, banks, and their clients.
