Informational only. This article is general education about published payment network rules. It is not financial, legal, or tax advice, and it does not recommend any payment method, product, or provider. Confirm requirements with your bank, your processor, and a qualified professional before changing any process.
Nacha, the body that writes the rules for the U.S. ACH Network, has approved an amendment that raises the Same Day ACH limit from $1 million to $10 million per payment. The effective date is September 17, 2027. For companies that pay vendors, fund payroll, move cash between accounts, or collect large invoices, that is a meaningful change to what Same Day ACH can carry. This article summarizes what Nacha has published, what it does and does not change, and the operational questions finance teams commonly work through before a limit change takes effect.
What Nacha Has Published About the New Limit
According to Nacha’s rule page, Increasing the Same Day ACH Dollar Limit to $10 Million, the amendment raises the per-entry limit from $1 million to $10 million, with an effective date of September 17, 2027. Nacha states that the increase applies to:
- Both credits and debits.
- Consumer and business payments.
- All three Same Day ACH settlement windows.
Nacha notes that separate, lower dollar limits for certain entry types (ARC, BOC, POP, RCK and XCK) would still apply, and that IAT (international) entries remain ineligible for Same Day ACH.
Nacha’s page also explains the reasoning. It points out that RTP raised its per-payment limit from $1 million to $10 million in June 2025, and that FedNow raised its limit from $1 million to $10 million in November 2025. Matching limits across account-based payment systems can reduce confusion for businesses that use more than one of them. For a comparison of those rails, see our post on ACH versus real-time payments.
Why Nacha Says the Change Matters for B2B
Nacha’s rule page lists the use cases it expects to benefit, and business-to-business payments are first on the list. In Nacha’s words, businesses, government agencies and other organizations will be able to use Same Day ACH for vendor and supply chain invoices up to $10 million. Other use cases Nacha names include tax payments, cash concentration, payroll funding (many payroll files are funded with an ACH debit), insurance claims, and same-day reversals of erroneous credits.
Nacha also reports the results of its request for comment: 117 responses were received, 87% of respondents supported raising the limit, and 81% supported $10 million specifically. Respondents identified B2B payments, payroll funding and cash concentration as the use cases with the greatest potential benefit. Those figures describe industry opinion collected by Nacha, not a forecast of adoption.
The Volume Context From Nacha’s Statistics
Nacha publishes network statistics on its ACH Network volume and value page. For full-year 2025, Nacha reports:
- 35.2 billion ACH payments worth $93 trillion across the network.
- Business-to-business payments of 8.08 billion, valued at $63.11 trillion.
- Same Day ACH volume of 1.45 billion payments valued at $3.92 trillion.
Nacha’s second quarter 2026 press release adds that Same Day ACH handled 435.7 million payments in the quarter, and that B2B payments totaled 2.2 billion in the quarter and 4.3 billion in the first half of 2026. Nacha’s B2B page also cites the Association for Financial Professionals (AFP) 2025 Digital Payments Survey, which found that 26% of B2B payments in the United States and Canada are made by check, compared with 81% in 2004. These are historical network statistics and survey results, and they say nothing certain about any one company’s results.
A Rule That Is Already in Effect: Next-Day Credit Availability
A separate Nacha amendment took effect on September 18, 2026. Under Funds Availability Requirements for Non-Same Day Credit Entries, a receiving bank must make a non-Same Day ACH credit available no later than 9:00 a.m. in its local time on the settlement date. The rule removed the earlier 5:00 p.m. receipt condition. Nacha describes the anticipated benefit as earlier availability for use cases such as payroll, refunds and invoice payments. Companies that receive ACH credits may want to ask their bank how it applies this requirement to their accounts.
Operational Questions to Work Through Before September 2027
Nacha’s own impact section tells participants to plan for larger dollar flows settling through the day. It identifies settlement at 1:00 pm, 5:00 pm and 6:00 pm Eastern Time, and says originating banks will need to decide whether to offer higher limits to their Same Day ACH customers. The actual limit a business can use will therefore depend on its bank’s decisions, not only on Nacha’s maximum. Questions that finance and treasury teams often raise include:
- Bank and processor limits. Will your originating bank or ACH provider offer the full $10 million, and under what credit and risk review? Origination limits are typically set per customer.
- Approval workflows. If your internal payment approval thresholds were written around a $1 million Same Day ACH ceiling, do they still make sense?
- Cutoff times. Which Same Day ACH window does your provider support, and what is its submission cutoff?
- Debit exposure. A company that authorizes a counterparty to debit its account should understand how a higher same-day debit limit interacts with its account balances and controls.
- Reconciliation. Larger same-day settlements mean larger intraday movements. Check that cash positioning and bank reporting can keep up.
Our guide to ACH payment processing for small business covers the basics of B2B invoicing and recurring ACH in more depth.
Fraud Controls Matter More as Limits Rise
A higher ceiling means a single payment can be much larger, which raises the importance of verifying who is being paid. Nacha’s rule summary lists fraud-monitoring requirements that were phased in during 2026: the first phase on March 20, 2026 and the second phase for all other originators and receiving banks on June 22, 2026, per Nacha’s summary of upcoming rule changes. Our 2026 Nacha compliance quick-start walks through the compliance side. Businesses typically pair these requirements with their own steps, such as confirming bank account details by an independent channel before a first payment or after any change request.
What This Does Not Change
- It does not change Same Day ACH eligibility rules for IAT entries, which Nacha says remain ineligible.
- It does not take effect until September 17, 2027. Until then, the current limit applies.
- It does not guarantee that any particular bank or provider will offer the new limit to you.
- It does not apply to card payments. Card acceptance is governed separately by network rules and your merchant agreement.
Where to Get Help
If you are comparing how ACH, card, and instant payment options fit into your business, a merchant services broker can walk through the options your acquirer and ACH provider offer. Call 866-305-6454 to discuss ACH, card acceptance, and gateway options for your business.
Disclaimer: This content is informational only and is not financial, legal, or tax advice. Rules and effective dates can change; verify details on the linked source pages and with your financial institution.
Sources
- Nacha: Increasing the Same Day ACH Dollar Limit to $10 Million
- Nacha: Summary of Upcoming Rule Changes
- Nacha: Funds Availability Requirements for Non-Same Day Credit Entries
- Nacha: ACH Network Volume and Value Statistics
- Nacha: Second Quarter 2026 ACH Network Press Release (July 30, 2026)
- Nacha: Business-to-Business (B2B) Payments
Need Help With Payment Processing?
Talk to our team about rates, gateways, and solutions for your business.
Get a Free Quote →