The ACI Speedpay Pulse report, published on 18 September by Omaha payments company ACI Worldwide, finds that 59% of US adults do not hold enough in their bank account to cover a $1,000 emergency expense. Nearly half of Gen Z and millennial respondents and 40% of Gen X fall into that group, and the ninth annual edition argues that financial pressure, rather than technology, is now the primary force reshaping how and when Americans pay their bills.

What the ACI Speedpay Pulse report measured

The study surveys at least 3,000 unique US adults who are responsible for paying at least two of their household’s monthly bills, balanced to US Census demographics, with a margin of error below 1.8% for questions answered by the full sample. It has run annually since 2018, which makes the trend lines more useful than any single year’s figures.

The behavioural findings describe what people do when money is tight. Debit card use for bill payment reached 52.7% in 2025, running 11.4 points ahead of credit cards, and among Gen Z it climbs to 74.7%, the highest share of any generation for any method. More than three in five respondents said control over when their bills are paid is very or extremely important. Clear and predictable due dates were the most valued tool at 50%, followed by real-time reminders at 44%.

Debit and autopay are converging for defensive reasons

The most useful finding is the convergence of debit cards and automated recurring payments. Just over 55% of consumers now combine one-time and automatic recurring payments, up from 43.4% in 2019, while debit remains the preferred method for one-time bills.

For years the industry read autopay adoption as a convenience story. The ACI Speedpay Pulse data points somewhere less comfortable. People are automating payments on a debit card specifically because a debit card cannot let them spend money they do not have. That is defensive behaviour, not convenience, and it describes a different customer than the one most bill pay roadmaps were designed around. Predictive billing features, which two in five respondents said they would use, make considerably more sense in that light.

Mobile is the other clear trend. Forty percent of consumers paid a bill through a mobile wallet in 2025, up from 17% in 2019, with Gen Z leading on both biller app usage at 52.5% and mobile wallet adoption at 22.4%. The same expectations are reshaping what businesses demand from their providers, a shift visible in small business digital banking as well as consumer billing.

The AI finding vendors should sit with

ACI reports that 53.4% of consumers have interacted with AI-powered billing or support tools, while 89.1% still prefer a live human to resolve a billing issue. That preference has strengthened every year since 2021 and holds even among Gen Z at 82%.

Anyone selling AI-first customer service into billers should read that twice. Adoption and trust are moving in opposite directions, and the gap has widened rather than closed as the tools have improved. It suggests consumers are willing to use automation for routine transactions and unwilling to rely on it when something has gone wrong and money is at stake, which is exactly when billing interactions become expensive.

Reading a vendor study honestly

ACI has an obvious interest in the conclusion. The report arrives alongside a pitch for Speedpay ONE, the company’s cloud-native bill pay platform with fraud prevention, and the framing that billers need payment resiliency and expanded options is a product brief wearing a research jacket.

That does not make the data wrong. The methodology is disclosed in detail, the sample is properly constructed, and the debit trend line has been consistent across multiple editions rather than appearing conveniently this year. Vendor research is worth reading with the incentive in mind rather than dismissing, and ACI’s has held up better than most because it publishes its margins of error and repeats the same questions annually.

The weaker claim is the suggestion that billers can meaningfully reduce financial stress through better payment design. General manager Ron Shultz described flexible bill payment as giving consumers better financial autonomy. Timing flexibility helps at the margin and reduces missed payments, which is a real benefit to both sides. It does not fix a household that is short $1,000, and positioning a payments platform as a response to wage stagnation stretches further than the numbers support. ACI has been building out the infrastructure side of this in parallel, including financial messaging capability within Connetic.

The two numbers to track next year

The tenth edition lands next year, and the figure to track is whether the 89.1% human support preference finally breaks as AI agents improve, or whether it keeps climbing. Five consecutive years of movement in one direction is a trend rather than noise, and if it holds through another generation of tooling it becomes a structural constraint on how far billers can automate service.

The second number is debit share. It passed credit in 2025 for the first time by a clear margin. Whether that gap widens or narrows will say more about US household finances than any survey question about sentiment.

Source: Business Wire, 18 September 2026, and ACI Worldwide.