Summary
The e-billing landscape delivered encouraging news in 2025: average days to payment fell from 62 to 50, marking the fastest payment cycle in more than 15 years of eBillingHub data. But another number moved just as dramatically in the opposite direction. Invoice rejection rates jumped from 11% to 18% in the same year, a 64% increase and the steepest rise on record. Together, these trends reveal a new reality for law firms: the path to payment is faster than ever, but getting invoices approved has become significantly more difficult.
For years, law firms have worked to shorten the time between submitting an invoice and receiving payment.
According to the 2025 E-Billing Intelligence Report, data from Elite's eBillingHub network which spans approximately 400 law firms, including about half of the Am Law 200, shows the average days to payment fell from 62 to 50. It was the fastest payment cycle observed in more than 15 years of eBillingHub data.
For finance leaders, a 12-day improvement is meaningful.
Faster payment cycles improve cash flow visibility, reduce working capital pressure, and shorten the distance between completed work and recognized revenue. For firms focused on optimizing the law firm revenue cycle, this is exactly the type of progress they have been seeking.
On the surface, the numbers suggest the e-billing ecosystem is becoming more efficient. And in many ways, it is. The challenge is that the payment story does not end there.
While payment cycles accelerated, invoice rejection rates moved sharply in the opposite direction. The same dataset showed rejection rates increasing from 11% to 18% in 2025, a 64% jump and the largest single-year increase recorded in the eBillingHub network.
Those two developments may seem difficult to reconcile.
How can invoices move through the system faster while more of them are being rejected?
The answer is that the e-billing ecosystem did not simply become faster. It became more demanding.
As the report notes, "the stark reality is that on average, firms are getting paid faster and losing more revenue at the same time."
The data suggests that faster payments are no longer the primary challenge. Increasingly, the bigger challenge is getting invoices approved in the first place.
The report points to a structural shift happening on the client side of the billing relationship.
Across legal spend management platforms, corporate legal departments are increasingly using AI-driven validation tools to evaluate invoices and enforce outside counsel guidelines (OCGs). What once required manual review can now happen automatically, consistently, and at scale.
That matters because many billing issues that previously slipped through now trigger flags, reductions, or outright rejections.
Importantly, the report makes clear that this does not reflect a sudden decline in billing quality across law firms. Rather, it reflects a change in how invoices are being evaluated. The standards shifted, and they shifted quickly.
The effect appeared consistently across legal spend management platforms, suggesting this was not tied to a single vendor or isolated workflow. It was a broader modernization of the invoice validation environment.
For law firms, the result is a new operating reality: payment systems have become more efficient, but invoice acceptance has become more selective.
This shift creates a particular challenge for firms that still rely heavily on manual e-billing compliance processes.
According to the report, 71% of firms continue to manage OCG compliance primarily through manual methods.
That approach was easier to sustain when client-side review was slower and more flexible. Today, compliance requirements are enforced with greater speed and consistency. Small deviations, interpretation gaps, and billing patterns that once received little scrutiny are more likely to be identified before an invoice reaches approval.
The challenge for finance leaders is not simply reducing invoice rejection rates. It is recognizing that every rejection creates additional work inside the revenue cycle. Rejections lead to resubmissions, delays, write-down risk, and administrative effort that can erode the benefits of faster payment processing.
A faster payment ecosystem only creates value when invoices successfully move through it.
The data suggests that the firms seeing the greatest benefit from shorter payment cycles are also the firms closing the compliance gap.
As the report explains, firms that have modernized how they send and manage invoices are already seeing the payoff. The path from invoice submission to recognized revenue is shorter than it has ever been, but only for firms that can consistently navigate increasingly strict compliance requirements.
That distinction is becoming increasingly important.
For years, firms focused on accelerating payment after invoice submission. Today, many finance leaders are recognizing that the more important question may be what happens before submission.
Because in a billing environment shaped by AI-driven validation, the fastest way to get paid is often to avoid rejection altogether.
The 2025 e-billing data tells a story that every law firm finance leader should understand. Payments are arriving faster than ever. But approval has become harder than ever.
The firms capturing the full benefit of shorter payment cycles are not simply submitting invoices faster. They are reducing the obstacles that prevent invoices from being approved in the first place.
As client-side AI continues raising the bar for invoice acceptance, days to payment will remain an important metric. But invoice rejection rates may become an even more important indicator of how effectively firms are protecting revenue inside the modern law firm revenue cycle.
The full picture, including what's driving rejections and what the fastest-paying firms are doing differently, is in the 2025 E-Billing Intelligence Report: E-Billing After AI.
Download the report to explore the data behind these trends and what they mean for law firm finance leaders.
Q. Why are invoice rejection rates increasing?
A. According to the 2025 E-Billing Intelligence Report, rising adoption of AI-driven validation tools by corporate legal departments is increasing scrutiny of invoice compliance and enforcement of outside counsel guidelines.
Q. What are days to payment?
A. Days to payment measures the average time between invoice submission and payment receipt. In 2025, average days to payment fell from 62 to 50 across the eBillingHub network.
Q. What is OCG compliance?
A. OCG compliance refers to adherence to a client's outside counsel guidelines, which establish billing rules, narrative requirements, approved activities, and other invoice expectations.
Q. Why do invoice rejections matter?
A. Invoice rejections can delay cash flow, create additional administrative work, increase resubmission efforts, and contribute to revenue leakage through write-downs and reductions.
Q. How many firms were included in the report?
A. The report analyzed data from approximately 400 law firms, including about 50% of the Am Law 200.
About Elite
Elite is the trusted automation platform for law firm operations across most of the world's largest and most successful law firms. Founded in 1947, Elite has guided firms through every technology shift and today delivers the only AI-enabled SaaS platform that unifies financial, invoice, time, and data management into a single system of action. Learn more at elite.com.
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