Overdue Invoice 2026: The Complete Picture [Data]

59% of small businesses carried at least one invoice overdue by 30 days or more in 2026, up from 47% the year before, according to Intuit QuickBooks’s 2026 Small Business Late Payments Report. That single number sits on top of a much larger picture: why invoices go overdue, how the US compares to Canada and Mexico, and what actually happens to a business once an invoice is sitting unpaid. This roundup pulls together the newest sourced data on all three.

How many invoices are overdue right now?

Nearly 3 in 5 small businesses (59%) said at least some of their invoices were sitting unpaid past the 30-day mark in 2026, up sharply from 47% a year earlier, per Intuit QuickBooks’s 2026 Small Business Late Payments Report, which draws on its ongoing Small Business Insights survey of roughly 5,000 respondents each quarter. For 22% of businesses it is not just a few stragglers: at least a fifth of their invoices are overdue past 30 days. Businesses waiting on unpaid invoices are owed $17,700 on average, slightly above the $17,500 figure from QuickBooks’s 2025 wave of the same survey, cited in BillyPaid’s earlier Late Payment Statistics 2026 roundup. Looked at from the B2B trade-credit side rather than the small-business side, Atradius’s Payment Practices Barometer found 43% of US B2B credit sales overdue in 2025, with 52% paid on time and 5% written off entirely as bad debt.

Figure 1: 59% of small businesses had at least one invoice overdue by 30 days or more in 2026. Source: Intuit QuickBooks, 2026 Small Business Late Payments Report.

Is the overdue rate rising or falling?

It is rising, not falling, based on QuickBooks’s own year-over-year comparison: the share of small businesses carrying invoices overdue by 30 days or more jumped from 47% in the 2025 wave of its report to 59% in the 2026 wave, a 12-percentage-point increase in a single year. Atradius’s Payment Practices Barometer shows a milder version of the same direction for pure B2B trade-credit sales, with 43% of US invoices overdue in the survey fielded between the end of Q2 and mid Q3 2025. The two figures are not measuring identical things (one counts affected businesses, the other counts the value of credit sales), but both point the same way: getting paid within 30 days has stopped being the default outcome for a meaningful share of US small businesses.

Figure 2: The share of small businesses with invoices overdue past 30 days rose 12 percentage points year over year. Source: Intuit QuickBooks, 2025 and 2026 Small Business Late Payments Reports.

How does the US compare to Canada and Mexico?

Overdue B2B invoices are a North America-wide pattern, not a US-specific one. Canada’s overdue rate (44% of B2B credit sales) is the highest of the three, the US sits at 43%, and Mexico is lowest at 41%, according to Atradius’s 2025 Payment Practices Barometer for North America. Bad debt write-offs tell a slightly different story: Canadian companies wrote off 7% of long-overdue invoices as uncollectible, more than the US’s 5% and nearly double Mexico’s 4%. Average payment terms differ too: US and Canadian B2B invoices both carry a 45-day average term from invoicing, while Mexican invoices run a bit longer at 50 days on average.

Figure 3: Overdue B2B invoice rates across North America. Source: Atradius Payment Practices Barometer, North America 2025.

Why do B2B invoices go overdue in the first place?

The single biggest reason US B2B customers pay late is their own liquidity problems, named by 45% of suppliers as one of their top four causes, according to Atradius’s 2025 survey. Delays inside the customer’s own payment process rank second at 33%, followed by supply chain disruptions (26%) and invoice disputes (23%). The ranking shifts slightly north of the border: Canadian suppliers point first to delays in the customer’s payment process (31%), then liquidity issues (30%), invoice disputes (26%), and supply chain disruptions (20%). In both countries, the leading causes sit largely outside a supplier’s direct control, which is part of why BillyPaid’s Invoice Statistics 2026 roundup treats faster, more consistent follow-up, not stricter terms alone, as the more reliable lever available to a small business.

Figure 4: Top four reasons US B2B customers pay invoices late. Source: Atradius Payment Practices Barometer, US 2025.

Do payment terms predict whether an invoice goes overdue?

Yes, sharply so. More than half (55%) of US small businesses on net-30 terms report overdue invoices, compared with 26% of businesses that require immediate payment, per QuickBooks’s 2026 report. The relationship holds in reverse too: among businesses with no overdue invoices at all, 64% require payment immediately, versus just 34% of businesses currently dealing with overdue invoices. Shorter terms do not eliminate the problem entirely, since even upfront-payment businesses sometimes deal with late payers, but the data shows the wait is often structural, built into the terms themselves before a single invoice is ever sent.

Payment terms	Businesses reporting overdue invoices
Immediate payment required	26%
Net-30 terms	55%

Table 1: More than half of businesses on net-30 terms report overdue invoices, more than double the rate for businesses requiring immediate payment. Looked at in reverse, 64% of businesses with zero overdue invoices require immediate payment, versus just 34% of those currently carrying overdue invoices. Source: Intuit QuickBooks, 2026 Small Business Late Payments Report.

What happens to a business once invoices go overdue?

It becomes a chain of downstream problems, not just an unpaid line item. 51% of businesses with overdue invoices report cash flow problems, compared with 36% of businesses without any, and 38% say they have grown more reliant on credit cards to cover the gap, compared with 21% of businesses with no overdue invoices. Nearly 2 in 5 owners (39%) say a single late payment made it hard to cover payroll or bills at some point in the past year. The pressure moves downstream from there: 53% of businesses with overdue invoices say outside pressures delayed their own outgoing payments to contractors, suppliers, or vendors, versus 26% of businesses with no overdue invoices, and 24% specifically blame delayed incoming revenue for missing a payment they owed someone else. Late money in becomes late money out.

Figure 5: Businesses carrying overdue invoices are far more likely to report cash flow problems than those without. Source: Intuit QuickBooks, 2026 Small Business Late Payments Report.

What does an overdue invoice actually cost a business?

On average, $39,406 a year, and for one in ten businesses it is far worse. A 2025 survey of more than 500 small business owners by invoice-factoring specialist Gateway Commercial Finance found the average annual cost of late payments, once financing fees, admin time, and cash flow workarounds are added up, runs to $39,406 per company, with 10% of respondents reporting costs above $100,000. Some of that unpaid balance is never collected at all: Canadian suppliers wrote off 7% of their long-overdue invoices as bad debt in 2025, compared with 5% in the US and 4% in Mexico, per Atradius. None of these figures include the time cost of chasing the money down in the first place, which BillyPaid’s Invoice Statistics 2026 roundup puts at 14 hours a week for the average small business collecting on unpaid invoices.

Country / segment	Overdue rate	Written off as bad debt	Source
US small businesses (2026)	59% overdue 30+ days	Not measured in this survey	Intuit QuickBooks, 2026
United States B2B credit sales (2025)	43% overdue	5%	Atradius, US 2025
Canada B2B credit sales (2025)	44% overdue	7%	Atradius, North America 2025
Mexico B2B credit sales (2025)	41% overdue	4%	Atradius, North America 2025

Table 2: Overdue invoice rates are measured differently by segment (affected businesses vs. share of credit sales) and are not directly interchangeable across rows.

The Bottom Line

The data across every angle points the same way: more small businesses are carrying overdue invoices in 2026 than a year ago, the leading causes sit mostly outside a supplier’s direct control, and the practical cost, in cash flow strain, credit card reliance, and knock-on delays to a business’s own vendor payments, is real and quantifiable. What the payment-terms data also shows is that the fix is structural as much as it is behavioral: businesses that require faster payment and follow up consistently carry fewer overdue invoices than those that do not. A BillyPaid payment reminder automates that follow-up on every invoice by default, so an invoice does not have to sit quietly past its due date before someone notices.

Frequently Asked Questions

What percentage of small business invoices are overdue in 2026? 59% of small businesses had at least one invoice overdue by 30 days or more in 2026, up from 47% the year before, according to Intuit QuickBooks’s 2026 Small Business Late Payments Report. Measured as a share of B2B credit sales rather than affected businesses, Atradius’s 2025 Payment Practices Barometer found 43% of US B2B invoices overdue.

Is the overdue invoice rate getting better or worse? Worse, based on the most recent year-over-year data. The share of US small businesses with invoices overdue by 30 days or more rose from 47% to 59% between Intuit QuickBooks’s 2025 and 2026 Small Business Late Payments Reports, a 12-percentage-point increase in a single year.

Which country has the highest rate of overdue B2B invoices: the US, Canada, or Mexico? Canada, at 44% of B2B credit sales overdue in 2025, narrowly ahead of the US at 43% and Mexico at 41%, according to Atradius’s Payment Practices Barometer for North America. Canadian suppliers also wrote off the highest share of long-overdue invoices as bad debt, at 7%, compared with 5% in the US and 4% in Mexico.

What happens to a small business’s cash flow when invoices go overdue? 51% of businesses with overdue invoices report cash flow problems, compared with 36% of businesses with none, and 38% say they have become more reliant on credit cards to cover the gap, versus 21% of businesses with no overdue invoices, per Intuit QuickBooks’s 2026 Small Business Late Payments Report. 39% of owners say a single late payment made it hard to cover payroll or bills at some point in the past year.

Sources and References

1. Intuit QuickBooks: 2026 Small Business Late Payments Report (published July 7, 2026), overdue-invoice rate, year-over-year change, payment-terms breakdown, and cash flow/credit card ripple effects.
2. Intuit QuickBooks: 2025 US Small Business Late Payments Report, prior-year overdue rate and amount owed, for year-over-year comparison.
3. Atradius: Payment Practices Barometer, US 2025, US overdue rate, bad debt write-offs, and top reasons for late payment.
4. Atradius: Payment Practices Barometer, North America 2025, Canada and Mexico overdue rates, bad debt write-offs, and reasons for late payment.
5. Gateway Commercial Finance: 2025 survey of 500+ small business owners, average annual cost of late payments.

Note: All figures verified as of August 2026.