Invoice Trends 2026 [Full Report]

Days Sales Outstanding fell from 45 days to 39 days year over year among businesses using accounts-receivable automation in 2025, according to Billtrust’s 2026 AR Benchmark Report, even as the broader US economy’s median DSO moved the opposite direction, rising to 40.12 days per the Credit Research Foundation. That split captures what 2026’s invoicing data actually shows: several trend lines are all pointing the same direction at once, e-invoicing volume, digital payment adoption, and AP automation are climbing, while collections performance for anyone standing still is not.

Is e-invoicing volume actually rising heading into 2026?

Yes, and mandates are doing most of the pushing. Billentis estimates that only 29% of the world’s roughly 300 billion B2B invoices went out electronically in 2026, but projects that share climbing as electronic B2B volume rises from about 88.3 billion invoices in 2026 to 107 billion by 2030, a forecast built only on e-invoicing mandates already officially announced rather than optimistic voluntary uptake.

Figure 1: Global electronic B2B invoice volume, 2026 versus the 2030 forecast. Source: Billentis, Riding the Tornado (June 2026).

Regional adoption still varies sharply, Latin America leads at 78% electronic and Europe follows at 64%, a gap this site’s digital invoicing adoption data covers region by region. The direction matters more than the current share. A market moving from 29% electronic toward a higher number, on a timeline set by law rather than voluntary adoption, behaves differently than one waiting on businesses to decide for themselves. For a business trading in a market without a mandate yet, the practical move is switching before the law forces it, since an invoice sent as a payable link already looks like the format most of the world is being pushed toward.

Is AP automation adoption actually accelerating?

It is, unevenly. Ardent Partners’ State of ePayables 2025 report, its 20th annual edition, found that 70% of AP departments now run an eInvoicing solution, the single most widely adopted ePayables technology, followed by ePayments solutions and document imaging or scanning at 67% each, automated data capture or extraction at 62%, and a full procure-to-pay solution at 60%. Even so, the report notes that roughly one-third of the AP market remains fully unautomated, a share that has moved in the right direction but plateaued more than once over the research series’ history.

Figure 2: Share of AP departments using each ePayables solution, 2025. Source: Ardent Partners, State of ePayables 2025.

Automation is also where AP leaders say their attention is going next, not just where it already sits. Increasing automation across AP processes is the top-cited objective for 65% of AP leaders, ahead of every other AI-related priority in the survey, and deploying a comprehensive ePayables solution is a key 2025 initiative for 46% of AP leaders. The gap between departments that have automated and those that have not keeps widening rather than closing: Ardent Partners’ Best-in-Class group, the top 20% by processing cost and cycle time, now processes an invoice for 79% less than everyone else, 79% faster, and with a 47% lower exception rate, having enabled 1.4 times more of their suppliers to submit electronic invoices in the first place. BillyPaid’s own invoice automation ROI data has the fuller cost and speed comparison between average and best-in-class AP teams.

The 20-year view is the clearer trend signal for the market as a whole, rather than just the leading edge of it. Ardent Partners’ own research, spanning two decades of the same annual study, shows average invoice processing costs that could once exceed $20 and cycle times that regularly topped 20 days in the early 2000s have both fallen to less than half of that: $9.84 per invoice and 8.2 days on average in 2025, with cost reductions as much as 60% to 80% for teams that have automated compared with manual, paper-based processing.

Figure 3: Average invoice processing time, early 2000s versus 2025. Source: Ardent Partners, State of ePayables 2025.

Is digital payment share catching up to paper and checks?

Invoicing going digital and payments going digital are two related but distinct trends, and it is worth separating them. Ardent Partners’ State of ePayables 2025 report found that 51.4% of all invoices are now submitted electronically, alongside 68% of payments made electronically rather than by check, so the payment side is already ahead of the invoice side on that measure. The clearer year-over-year signal, though, comes from businesses already running AR automation. Billtrust’s 2026 AR Benchmark Report, drawing on its own client base across thousands of organizations, found touchless payment processing, meaning payments requiring no manual intervention, rose from 90.11% to 92.35% between 2024 and 2025. Electronic invoice delivery rose over the same year, from 79.65% to 81.76%. Both climbed in the same twelve months, which is the more useful signal than either number in isolation: the shift toward digital is not a one-off spike but a sustained, same-direction move across two related metrics at once.

Figure 4: Touchless payment processing and electronic invoice delivery, 2024 versus 2025. Source: Billtrust, 2026 AR Benchmark Report.

Not every collections metric moved the same direction in that same data set. Billtrust’s own numbers show average days delinquent ticking up from 5 to 6 days and credit application approval rates tightening from 84.09% to 78.44%, evidence that businesses are getting faster at processing and delivering invoices digitally while simultaneously getting more cautious about who they extend credit to in the first place.

Which direction is DSO actually moving in 2026?

Two different directions, depending on which businesses get measured. The Credit Research Foundation’s National Summary of Domestic Trade Receivables, a quarterly survey it has run since 1960, put the broad US median DSO at 40.12 days in the first quarter of 2026, up from 38.00 days a year earlier. Billtrust’s AR-automation client base moved the opposite way over roughly the same period, averaging 39 days DSO in 2025, down from 45 days in 2024. BillyPaid’s DSO benchmark data has the full breakdown by company population and region.

Figure 5: DSO trend direction, US economy-wide versus AR-automation adopters. Sources: Credit Research Foundation NSDTR; Billtrust 2026 AR Benchmark Report.

The Hackett Group’s 2025 US Working Capital Survey, covering the 1,000 largest US public nonfinancial companies, adds a third data point that complicates the picture further: cash conversion cycle for that group improved 4% to 37 days, but the improvement was driven mainly by a 3% rebound in days payable outstanding to 59 days, meaning these companies got faster at paying their own suppliers, not at collecting from their own customers. DSO for that same group worsened for a second consecutive year, and the gap between top-quartile and median performers on DSO, worth an estimated $600 billion in trapped working capital across the group, widened rather than closed. Consistent, automated follow-up on unpaid invoices, the kind a scheduled reminder sequence runs without a credit team having to remember it, is the one lever that shows up on the fast side of every DSO benchmark in this data set.

2026 Invoice Trend Snapshot

Metric	Prior period	2025 or 2026	Direction
DSO, AR-automation adopters	45 days (2024)	39 days (2025)	Improving
DSO, US economy-wide median	38.00 days (Q1 2025)	40.12 days (Q1 2026)	Worsening
Touchless payment processing	90.11% (2024)	92.35% (2025)	Rising
Electronic B2B invoice volume	88.3B (2026)	107B (2030 forecast)	Rising

Table 1: Four separately sourced 2026 invoicing trend lines, each moving in the direction shown. Sources: Billtrust 2026 AR Benchmark Report; Credit Research Foundation NSDTR; Billentis.

The Bottom Line

Most of 2026’s invoicing data points the same direction: e-invoicing volume is climbing toward a mandate-driven 107 billion invoices by 2030, AP automation adoption keeps inching up even where it has plateaued before, and digital payment processing is getting more touchless every year measured. The one metric that does not move in lockstep is DSO, and the reason is not mysterious: it improves for businesses that automate collections and follow-up, and drifts for businesses that do not, a divergence Billtrust’s and the Credit Research Foundation’s 2025 to 2026 numbers show side by side. A BillyPaid invoice ships as a structured, payable document with reminders built in by default, which is the same automated-follow-up pattern behind every improving DSO figure in this data set, not a coincidence. For the deeper collections context behind why DSO diverges the way it does, see Late Payment Statistics 2026 and Invoice Statistics 2026.

Frequently Asked Questions

Is invoicing actually going digital faster in 2026? Yes. Global electronic B2B invoice volume is forecast to climb from about 88.3 billion in 2026 to 107 billion by 2030, according to Billentis, and 70% of accounts payable departments now use a dedicated eInvoicing solution, per Ardent Partners’ State of ePayables 2025 report.

Is DSO getting better or worse in 2026? It depends who you ask. Businesses using accounts-receivable automation saw DSO fall from 45 days to 39 days year over year in 2025, per Billtrust’s 2026 AR Benchmark Report, while the broader US economy’s median DSO rose from 38.00 to 40.12 days over roughly the same window, according to the Credit Research Foundation.

How much has invoice automation actually saved over time? A lot, over a long enough window. Ardent Partners, whose State of ePayables research now spans 20 years, reports that average invoice processing costs and cycle times have both fallen to less than half of what they were in the early 2000s, when costs could exceed $20 an invoice and cycle times regularly topped 20 days. The 2025 averages are $9.84 per invoice and 8.2 days.

Are digital payments replacing checks and paper faster now? The share is climbing, at least among businesses already invoicing electronically. Billtrust’s 2026 AR Benchmark Report found touchless payment processing rose from 90.11% to 92.35% and electronic invoice delivery rose from 79.65% to 81.76%, both in a single year, 2024 to 2025.

Sources and References

1. Billtrust, 2026 Accounts Receivable Benchmark Report, DSO, touchless payments, and eDelivery adoption trend data.
2. Credit Research Foundation, National Summary of Domestic Trade Receivables, Q1 2026, US median DSO trend.
3. Billentis (Bruno Koch), Riding the Tornado: A Guide to Mastering Multinational E-invoicing and Compliance (June 2026), global electronic B2B invoice volume and forecast.
4. Ardent Partners, The State of ePayables 2025: AP’s Unfinished Journey (20th annual report, sponsored by Bottomline), ePayables adoption rates and 20-year processing cost and cycle time trend.
5. The Hackett Group, 2025 US Working Capital Survey, cash conversion cycle, DPO, and DSO trend among the largest US public companies.

Note: All figures verified as of August 2026.