IntelliPay is a PCI DSS Level 1 payment processor serving government agencies, healthcare providers, and businesses across the United States. This article looks at what changed in ACH activity through the first half of 2026, why the government sector is a bigger part of that story than most coverage suggests, and what's coming next for the network. Learn more about government payment solutions and IntelliPay's 2025 ACH year-end recap.
Quick Read
ACH volume grew 5.5% year-over-year through Q2 2026, and for the first time in a while, growth showed up across consumer, B2B, and government segments at once.
- Federal government ACH volume returned to modest growth after a flat 2025, driven partly by tariff refunds and new tax-free newborn account deposits.
- Same Day ACH volume is up more than 26% year-over-year, with B2B same-day activity up roughly 30%.
- The $1 million Same Day ACH cap is set to rise to $10 million on September 17, 2027, removing a workaround many corporate treasurers currently rely on.
- New Nacha transaction-monitoring rules put shared responsibility for catching fraud on originators and receiving institutions alike.
Most of the attention in payments right now goes to what's new: stablecoins, agentic commerce, instant-payment rails. ACH doesn't get discussed with the same excitement, mostly because it doesn't need to. But the data coming out of Nacha for the first half of 2026 tells an interesting story that hasn't gotten much coverage: growth isn't concentrated in one segment anymore. It's broad, and it's touching parts of the network — government payments in particular — that had been flat for a while.
Growth is showing up everywhere at once, not just in B2B
Through the first half of 2026, ACH Network volume grew 5.5% year-over-year, according to Nacha's Michael Herd, Executive Vice President of Network Administration, speaking on a recent PaymentsJournal podcast alongside Ben Danner, Senior Debit Analyst at Javelin Strategy & Research. What stands out isn't the headline number so much as where it's coming from. B2B payment volume climbed nearly 10% in the first half of the year, continuing a trend that's been building for close to a decade as supplier payments and contractor payouts move off paper. Consumer online payments and transfers rose about 6.5%, fueled largely by account-to-account transfers and digital wallet activity. And federal government volume, which had been essentially flat, moved back into modest growth — a bit over 3%.
That last figure is the one worth sitting with, because it's the segment most people assume has already finished digitizing.
Why federal government ACH volume is growing again
A year ago, federal government payment volume on the ACH Network was flat. That's changed. Herd pointed to a few specific drivers behind the return to growth: the government has been issuing tariff refunds, depositing seed funds into the new tax-free newborn accounts program, and continuing efforts to eliminate check disbursements in favor of electronic payment.
None of these are one-time blips. Tariff refund cycles tend to recur as trade policy shifts. Newborn account seeding is a new, ongoing program rather than a single disbursement event. And the push to eliminate government checks has been a stated policy direction for years — it's just now showing up more clearly in the volume data. For state and local agencies watching the federal government's playbook, this is a useful signal: the shift away from paper disbursement isn't slowing down, and the agencies still issuing checks for refunds, benefits, or vendor payments are increasingly the exception rather than the rule.
Government payment takeaway
Check elimination is accelerating at the federal level — and setting the pace for state and local agencies.
Agencies that still rely heavily on paper for refunds, benefit payments, or vendor disbursements should expect growing pressure — from constituents and from policy — to move those flows to ACH.
Same Day ACH is growing faster than the network itself — and the cap is about to change
Same Day ACH volume is up more than 26% year-over-year, outpacing overall network growth by a wide margin. Consumer-side Same Day activity is the biggest driver, up over 50%, largely tied to account-to-account transfers, digital wallet funding, and credit card issuers pulling payment more quickly once a bill is due. B2B Same Day ACH activity is up roughly 30%, used for cash concentration, merchant settlements, tax payments, and withholding remittances.
Here's the detail that hasn't gotten much attention yet: many corporate treasury teams have built exception-handling processes around the current $1 million Same Day ACH transaction cap, because larger payments simply can't move through that window. That workaround is going away. Starting September 17, 2027, the cap rises to $10 million. Danner framed the change as giving treasurers more flexibility for exactly the kind of payments that currently get routed around Same Day ACH — large supplier payments, commercial real estate transactions, brokerage funding, and insurance claims.
Note on IntelliPay's ACH processing: IntelliPay processes standard ACH transactions and does not currently offer Same Day ACH. The trends above are shared as industry context for organizations planning treasury and payment strategy — not as a description of IntelliPay's service. For the reasons outlined in our government payment processing guide, standard ACH funding timelines give routine returns more time to surface before funds are treated as available — which is part of why we've built our platform around that model rather than faster, higher-risk funding windows.
For organizations that have built manual workarounds to handle high-dollar payments outside the Same Day window elsewhere in their payment stack, this is worth flagging to treasury and finance teams now, well ahead of the 2027 effective date. Removing the exception process is a process change, not just a limit increase.
| Segment | H1 2026 Same Day ACH Growth | Primary Driver |
|---|---|---|
| Consumer | 50%+ year-over-year | A2A transfers, wallet funding, credit card bill payments |
| Business (B2B) | ~30% year-over-year | Cash concentration, merchant settlement, tax remittance |
| Network overall | 26%+ year-over-year | Combined consumer and business acceleration |
The open banking gap isn't about adoption — it's about age
Open banking's growth is often described as an overall market trend, but the more useful way to look at it is generational. A recent Nacha study found that roughly 89% of consumers under age 34 are comfortable linking their bank accounts to third-party services, wallets, and apps. Older consumers show meaningfully less comfort with that model, and many still rely on a paper checkbook simply to locate routing and account numbers for ACH payments — something a growing share of younger consumers has never owned.
Danner made a point worth remembering here: as account-linking becomes the default way younger consumers pay bills or enroll in services, most of them won't think of it as "making an ACH payment" at all. It'll just be logging into their bank account. The rail becomes invisible, even as it carries more volume than ever. For billers and government agencies planning digital payment options, that generational split is more actionable than a single adoption-rate headline — it tells you which channel to lead with depending on who you're collecting from.
What the new transaction-monitoring rules actually ask organizations to do
As ACH volume and value have grown, so has scrutiny on fraud — particularly business email compromise, where a fraudster impersonates a vendor or executive to redirect a legitimate payment. Nacha's newer transaction-monitoring rules put responsibility on every party in the payment chain, not just the bank on one end.
In practice, that means two things. For businesses originating payments, it means treating any request to change payment or account information as something to verify independently rather than act on directly — the standard security advice of "don't trust, verify" applied specifically to payment instructions. For receiving institutions, it means watching for deposit patterns that don't fit, such as a large business payment landing in a personal consumer account, which is one of the more common signatures of a successful business email compromise scheme.
Herd noted that Nacha expects to start collecting and sharing success stories from the field as these rules mature — a signal that the industry is still early in figuring out which monitoring approaches actually catch fraud before funds move, rather than after.
What's next: stablecoins, AI agents, and a rail that keeps getting asked to do more
Two forces likely to shape ACH over the next few years didn't exist as serious considerations a decade ago. The first is digital assets. Herd expects ACH to become a common on-ramp and off-ramp for moving U.S. dollars into and out of stablecoins and tokenized exchange networks, through digital wallets that are already well established in the ACH ecosystem for account-to-account transfers, investing, and even sports wagering. Today, that's a relatively small group of users. Herd expects it to become far more commonplace as digital-asset activity spreads to the general population.
The second is AI agents initiating payments on a person's or business's behalf. Herd expects this to eventually cover most ACH use cases — an AI agent authorizing and initiating a payment rather than a human clicking "submit." But he was clear that the industry hasn't worked out the guardrails yet. Open questions include what standards and tools are needed to support agent-initiated payments safely, and how the network handles authorization, identity, and trust when the party initiating a payment isn't a person at all.
Neither of these developments displaces ACH. They extend it. That's been the pattern for fifty years — new use cases keep finding their way onto a rail built for something else entirely, because the rail is cheap, universal, and already trusted.
What this means for government agencies and finance teams right now
Practical next steps
- If your agency still issues refunds, benefits, or vendor payments by check, treat the federal government's shift as a preview, not an outlier — plan the electronic migration now rather than reactively.
- Flag the September 2027 Same Day ACH cap increase to treasury now if your organization currently routes high-dollar payments around the $1 million limit — the exception process itself will need to be retired, not just the limit.
- Segment your payer base by how comfortable they are with account-linking rather than assuming uniform adoption — younger payers are ready for pay-by-bank now; others still need traditional ACH enrollment paths.
- Review your account-validation practices for any payment where banking details are new or recently changed — this is the single most effective control against business-email-compromise-driven ACH fraud.
- Keep AI-agent-initiated payments on your radar for governance and policy discussions, even if adoption is still early. The standards conversation is happening now.
Frequently asked questions
Why did federal government ACH volume return to growth in 2026?
Nacha cites three specific drivers: tariff refund disbursements, seed deposits into the new tax-free newborn accounts program, and continued efforts to eliminate paper check disbursements in favor of electronic payment. Federal volume had been flat the prior year before this rebound.
When does the Same Day ACH transaction cap increase to $10 million?
The cap is scheduled to rise from $1 million to $10 million per transaction on September 17, 2027. Organizations that currently use manual exception processes to move high-dollar payments outside the Same Day window should plan to retire those workarounds ahead of that date.
Is open banking adoption the same across all age groups?
No. Roughly 89% of consumers under 34 report being comfortable linking bank accounts to apps, wallets, and services, according to Nacha research. Older consumers show notably lower comfort with account-linking and are more likely to rely on traditional ACH enrollment using routing and account numbers from a paper check.
Will AI agents be able to initiate ACH payments?
Nacha leadership expects AI agents to eventually authorize and initiate ACH payments across most use cases, but the standards, tools, and guardrails needed to do this safely — covering authorization, identity, and trust — are still under industry discussion and have not been finalized.
How does ACH connect to stablecoins and digital assets?
ACH is expected to become a common way to move U.S. dollars into and out of stablecoin and tokenized exchange networks, typically through digital wallets that already use ACH for account-to-account transfers. This is currently a smaller use case but is expected to grow as digital-asset activity becomes more mainstream.
The bottom line
ACH isn't just holding steady in 2026 — it's absorbing new growth in places that had gone quiet, and new use cases nobody would have predicted a decade ago.
For government agencies and finance teams, the practical work is the same as it's always been: keep migrating off paper, keep validating payment instructions, and plan ahead for the rule and limit changes headed your way.
To review ACH, eCheck, and payment acceptance options for your organization, visit IntelliPay Government.
Disclaimer: This content is provided for general informational purposes only and does not constitute legal, accounting, banking, regulatory, or audit advice. Organizations should review payment strategy, compliance obligations, and internal control decisions with their own counsel, auditors, financial institutions, and payment processor.
