Invoice Error Rate 2026: 18.4% Industry Average [Data]

Key Takeaways

18.4% of invoices trigger an exception that blocks straight-through processing and needs manual fixing, on average across AP departments (Ardent Partners, State of ePayables 2025, 204 respondents).
Best-in-Class AP teams hold their exception rate to 11.1%, a rate 47% lower than the rest of the market’s 20.9% average (Ardent Partners).
The global invoice rejection rate jumped from 1.86% to 6.95% between Q1 2024 and Q1 2025, a 273% increase across 272 million invoices inspected (Basware, Invoice Rejection Analysis, May 2025).
48% of AP leaders name a high percentage of invoice exceptions as one of their top challenges for 2025, second only to slow approvals at 49% (Ardent Partners).
Correcting a single manual invoice error costs roughly $53, and the average all-inclusive cost to process one invoice runs $9.84 versus $2.65 at Best-in-Class organizations (IOFM; Ardent Partners).
Duplicate or erroneous payments run 0.8% to 2% of annual disbursements depending on AP maturity, with a typical SMB seeing a 1.29% duplicate invoice rate worth an average of $2,034 per duplicate (APQC; SAP Concur).

Nearly one in five invoices, 18.4% on average, cannot make it through an accounts payable department without a person stepping in to fix something first, according to Ardent Partners’ State of ePayables 2025 report, based on a survey of 204 AP professionals. That single number, the invoice exception rate, is the closest thing the industry has to a standard error rate benchmark, and it separates cleanly along one line: Best-in-Class AP teams hold it to 11.1%, while everyone else averages 20.9%, a gap of nearly two to one. Here is what the data says about how often invoice errors happen, what they cost, and whether the problem is getting better or worse in 2026.

What is the average invoice error rate in 2026?

The AP industry’s own benchmark for invoice accuracy is the exception rate, the share of invoices that fail to process “straight-through” because something on them needs correcting, matching, or clarifying before payment can proceed. Ardent Partners’ 2025 benchmarking, now in its 20th year, puts that figure at 18.4% across all AP departments surveyed, trending in the wrong direction (the report marks it “declining” year over year). For context, the same research puts the average all-inclusive cost to process a single invoice at $9.84 and the average processing time at 8.2 days, both figures exceptions push higher every time one occurs.

Figure 1: Average invoice exception rate across AP departments surveyed in 2025. Source: Ardent Partners, The State of ePayables 2025: AP’s Unfinished Journey (204 respondents, June 2025).

An exception is not the same thing as an outright mistake in every case, sometimes it is a legitimate mismatch that still needs a human to resolve, but Ardent Partners’ own research treats it as the practical error-rate proxy the industry tracks, and its report explicitly calls the invoice exception problem “the bane of AP’s existence.” That framing matters because it puts a number on something most small businesses only feel anecdotally, the sense that a chunk of every batch of invoices sent or received needs a follow-up email, a corrected total, or a resend before it actually gets paid. Twenty years into Ardent Partners’ annual benchmarking series, the report notes that the trendline on this particular metric has moved the wrong way in the most recent survey year, even as cost and cycle-time benchmarks elsewhere in the same report continue to improve.

How much better do the best AP teams actually do?

Considerably better, and consistently across every related metric, not just the headline rate. Ardent Partners’ maturity framework splits respondents into a “Best-in-Class” tier, the top 20% by processing cost and cycle time, against “All Others,” and the gap on invoice exceptions is one of the largest differences in the whole report: 11.1% for Best-in-Class organizations against 20.9% for everyone else, a rate 47% lower. That gap is not a rounding difference; it is the practical distance between an AP team that spends its week chasing corrections and one that spends its week on higher-value work.

Figure 2: Invoice exception rate, 2025, average across all respondents vs Best-in-Class vs All Others. Source: Ardent Partners, The State of ePayables 2025 (204 respondents, June 2025).

The same split shows up everywhere downstream of the error rate. Best-in-Class teams process 51.0% of invoices straight-through with no manual touch at all, versus 29.0% for All Others; they spend $2.65 per invoice against $12.42; and they process a single invoice in 2.9 days against 13.5 days. Ardent Partners attributes most of the gap to two structural advantages: Best-in-Class organizations have 1.4 times more suppliers submitting electronic invoices, and 1.8 times more invoices linked to a purchase order before they ever reach an approver, both of which remove the manual data entry that generates errors in the first place.

Are invoice errors and rejections getting worse or better?

In the short term, meaningfully worse, and the swing happened fast enough that it looks more like a market shock than a slow structural drift. Basware’s Invoice Rejection Analysis, which inspected 272 million invoices received across its network, found the global rejection rate jumped from 1.86% in the first quarter of 2024 to 6.95% in the first quarter of 2025, a 273% year-over-year increase covering roughly 2.9 million rejected invoices in that one quarter alone.

Figure 3: Global invoice rejection rate, Q1 2024 vs Q1 2025. Source: Basware, Invoice Rejection Analysis, reported May 2025.

Basware ties the spike directly to the April 2025 US tariff announcements, arguing that some businesses used rejections, not just genuine errors, as a cash-preservation tactic while renegotiating supplier terms and payment timing. That distinction matters for reading the number correctly: not every rejected invoice in that spike was factually wrong, but the mechanism, an invoice bounced back for correction or reissue, is identical either way, and it is the same friction point a genuinely erroneous invoice creates. Whether the cause is a strategic delay tactic or a plain data-entry mistake, the invoice sits unpaid until someone on both sides re-checks it, which is exactly the kind of manual back-and-forth an accurate, structured invoice is designed to avoid in the first place.

What actually goes wrong on an invoice?

The recurring culprits are unglamorous and largely preventable: price discrepancies against the agreed rate, quantity or line-item mismatches, tax miscalculations, a missing or incorrect purchase order reference, and incomplete paperwork such as a missing due date, tax ID, or billing address. Most of these trace back to a PO-matching failure or manual re-keying of data that already existed somewhere else in the transaction, which is exactly why Ardent Partners finds Best-in-Class organizations, with far more of their invoices pre-linked to a PO, avoid so many of them by default.

That friction shows up as a leadership-level headache, not just a line-worker annoyance. Asked to name their top challenges for 2025, AP leaders put a high percentage of invoice exceptions in second place, cited by 48%, just behind slow approval cycles at 49% and well ahead of fraud risk at 31%.

Figure 4: Share of AP leaders naming each item as a top challenge for 2025. Source: Ardent Partners, The State of ePayables 2025 (204 respondents, June 2025).

Manually resolving an exception is, in Ardent Partners’ words, “a significant drain on efficiency,” because it pulls staff off higher-value work and into one-off reconciliation, and when root-cause analysis is also manual, the same category of error tends to resurface instead of getting fixed for good.

What does a high error rate actually cost a business?

More than the invoice itself usually suggests. Estimates put the cost of correcting a single manual invoice error at roughly $53, according to an IOFM special report on the true costs of paper-based invoice processing, a figure that covers the staff time spent tracking down the discrepancy, re-entering corrected data, and re-routing the invoice for approval. That per-error cost is baked into the wider processing-cost gap Ardent Partners documents: the all-inclusive average cost to process one invoice is $9.84, more than triple the $2.65 Best-in-Class organizations spend. Multiply either figure across a few hundred invoices a month, the volume a typical small business or growing freelance practice handles, and a “small” error rate stops looking small; it becomes a recurring, budgetable line item that automation and cleaner source data both target directly.

Figure 5: All-inclusive cost to process one invoice, average vs Best-in-Class benchmark. Source: Ardent Partners, The State of ePayables 2025 (204 respondents, June 2025).

For a small business sending a modest volume of invoices a month, that gap is not abstract. A business issuing errors on even a fifth of its invoices, in line with the industry average, is paying a repeated tax in staff time and delayed cash on top of whatever it is already losing to late payment, a related problem BillyPaid’s Late Payment Statistics 2026 covers in more depth.

How common are duplicate invoice payments specifically?

Less common than the exception rate but far from rare, and one of the costliest error types because the business has already paid out real money before catching it. APQC’s Open Standards Benchmarking research on accounts payable found that duplicate or erroneous payments run 0.8% of annual disbursements at top-performing organizations and more than 2% at the weakest performers. On the small-business side, a SAP Concur analysis of SMB invoice data found a typical company processing roughly 450 invoices a month sees a 1.29% duplicate invoice rate, worth an average of $2,034 per duplicate, adding up to a meaningful monthly exposure if none of them are caught before payment.

Figure 6: Duplicate or erroneous payments as a share of annual disbursements, by AP performance tier and for a typical SMB. Source: APQC, Open Standards Benchmarking; SAP Concur, SMB invoice benchmark data.

Duplicates tend to happen for mundane reasons: a supplier resends an invoice that was already paid, two people in the same business independently enter the same paper invoice, or an invoice number gets reused. Automated matching against previously paid invoice numbers and amounts is what closes most of that gap, which is why the same organizations with low exception rates also tend to sit at the low end of the duplicate-payment range.

Invoice Error Rate at a Glance

Metric	All AP Departments	Best-in-Class	All Others
Invoice exception rate	18.4%	11.1%	20.9%
Cost to process one invoice	$9.84	$2.65	$12.42
Invoices processed straight-through	35.4%	51.0%	29.0%

Table 1: Invoice exception rate and related processing metrics, 2025, average vs Best-in-Class vs All Others. Source: Ardent Partners, The State of ePayables 2025 (204 respondents, June 2025).

The Bottom Line

The invoice error rate data lands on a consistent story: errors are common, expensive, and largely structural rather than random. An 18.4% exception rate means nearly one invoice in five needs a person to intervene before it can be paid, and the businesses that avoid that fate are not doing anything exotic, they are simply removing the manual re-keying and unmatched data that cause most errors in the first place, mainly by sending structured, prefilled invoices instead of retyped ones. That is the same fix a small business can apply on its own scale: a BillyPaid invoice pulls client and item details from saved records instead of a blank form retyped every time, which is exactly the kind of manual entry step Ardent Partners and Basware’s data both point to as the root of most invoice exceptions and rejections.

Frequently Asked Questions

What percentage of invoices have errors in 2026? On average, 18.4% of invoices trigger an exception, meaning they cannot be processed straight through and need a person to step in and fix something, according to Ardent Partners’ State of ePayables 2025 report, based on a survey of 204 accounts payable professionals. Best-in-Class AP teams hold that rate to 11.1%, while the rest of the market averages 20.9%.

Are invoice errors and rejections getting more common? Recent data suggests yes, at least short term. Basware’s Invoice Rejection Analysis, covering 272 million invoices, found the global invoice rejection rate jumped from 1.86% in the first quarter of 2024 to 6.95% in the first quarter of 2025, a rise Basware links to businesses using rejections to buy time amid new US tariff announcements.

How much does an invoice error actually cost to fix? Estimates place the cost of correcting a single manual invoice error at around $53, according to an IOFM (Institute of Finance & Management) special report on the true costs of paper-based invoice processing. That cost compounds quickly: Ardent Partners puts the all-inclusive average cost to process one invoice at $9.84, versus $2.65 at Best-in-Class organizations, a gap driven in large part by how many invoices need rework.

How common are duplicate invoice payments? APQC’s Open Standards Benchmarking research found that duplicate or erroneous payments account for 0.8% of annual disbursements at top-performing organizations and more than 2% at the weakest performers. A separate SAP Concur analysis of SMB invoice data found a 1.29% duplicate invoice rate, worth an average of $2,034 per duplicate.