Best Invoicing and Payment Collection Software for Law Firms
Quick comparison
Features and pricing change; we checked each tool's site in October 2026. Our research was limited: we could confirm details only for Clio, so the other tools below are described in general terms and you should check their sites before deciding.
| Tool | Best for | How it follows up | Collections | Pricing model |
|---|---|---|---|---|
| Casey | Firms that want unpaid invoices chased for them | Text, email and WhatsApp, timed to each client | Collections team after 60 days | Free if paid on time; $5 per chased invoice; 20% of recovered |
| Clio | Firms that want one practice management system | Check their site | Check their site | Per user per month, from $49 |
| LawPay | Firms that mainly need card and trust-compliant payments | Check their site | Check their site | Check their site |
| MyCase | Small firms wanting all-in-one software | Check their site | Check their site | Varies by plan |
| PracticePanther | Firms that want billing built into case management | Check their site | Check their site | Varies by plan |
| CosmoLex | Firms that want billing and accounting in one product | Check their site | Check their site | Varies by plan |
The point of this table is that these tools do different jobs. Most of them are systems for running a practice and creating bills. Few are built around the harder question: what happens when a client does not pay?
How we compared
A law firm is not like a plumber or a design studio. You bill after the work, often in large amounts, and you carry ethical duties about client money that other businesses do not. We looked at six things that matter to a small firm owner:
- Time saved. How much of the billing and chasing work disappears from your week.
- How follow-ups go out. Whether reminders are automatic, and whether they reach clients the way clients actually respond.
- Getting paid faster. Whether a client can pay in one click by card or bank transfer.
- Cost when clients pay on time. Many firms pay per user whether or not an invoice is ever late.
- What happens past 60 days. Whether there is a real next step, or just a red "overdue" label.
- Setup. How long before the first bill goes out.
One caution before the tools: trust accounting rules are real and they vary by state. Client funds held in trust must be kept separate from your operating money, and which payments may touch which account is governed by your state bar. We could not verify any bar guidance in this research, so confirm the rules with your state bar or ethics counsel before you pick any payment tool. Nothing here is legal advice.
Clio
Clio is the most widely known practice management platform for small law firms. According to Clio's pricing page, plans start at $49 per user per month, with four tiers: Starter, Core, Signature and Elite. The page also lists optional add-ons such as Clio Grow and Clio for Personal Injury, and it advertises a bundle discount of over 15%. It lists Pay Later with Affirm at 4.95% across all four plans. We could not confirm what the upper tiers cost or whether they are quote-only, so check the page directly.
What it does well: Clio puts matters, time tracking, billing and client communication in one place. For a firm that wants a single system of record, that is a real advantage, and it is why so many other tools integrate with it.
Where it falls short for collections: Clio is a practice management system first. We could not verify what its automated follow-up looks like for invoices that are weeks late, or whether it offers a collections step. If you already live in Clio, the gap to check is what happens to an invoice at 30, 60 and 90 days past due.
Who it suits: Firms that want one platform to run the practice and are happy paying per user every month.
LawPay
LawPay is known as a payment tool built for legal practices, with a focus on accepting card payments in a way that respects the separation between trust and operating money. We could not verify its processing rates or its trust account handling on an official site, so we are not quoting any numbers.
What it does well: If your biggest worry is taking payments correctly, a tool designed around that problem is a sensible choice.
Where it may fall short: A payment tool collects payment when the client is ready to pay. It is not the same as someone who follows up when they are not. Check whether it sends reminders and what it does with accounts that go quiet.
Who it suits: Firms that need compliant payment processing and already have another way to chase invoices.
MyCase
MyCase is an all-in-one practice management product aimed at small firms, with billing and online payments alongside case management. We could not check its plan names or prices, so look at its site for current tiers.
What it does well: An all-in-one approach can mean fewer logins and a simpler setup for a small team.
Where it may fall short: As with other all-in-one systems, ask specifically about late invoices: how reminders work, how often they send, and what the next step is when a client stops responding.
Who it suits: Small firms starting from scratch who want one system for everything.
PracticePanther
PracticePanther combines case management with billing and payments. We could not verify its current plans or pricing, so treat any numbers you see in third-party roundups with caution, since plan names change often.
What it does well: Billing sits close to the matter and time entries, which cuts down on re-keying.
Where it may fall short: Same question as the others: what does it do about an invoice that is 45 days late?
Who it suits: Firms that want billing tied tightly to case work.
CosmoLex
CosmoLex is positioned as a legal billing and accounting product. We could not confirm its trust accounting features or pricing on an official site.
What it does well: Firms that want legal accounting inside the same product as billing often look at tools like this.
Where it may fall short: Verify the follow-up and collections side of the product before you commit.
Who it suits: Firms that want accounting and billing together and are comfortable with a more finance-heavy tool.
Why we built Casey differently
Most of the tools above manage the practice. Casey does one job: it gets your bills paid. That focus shapes how it works.
- You text it like an employee. Message Casey on iMessage, WhatsApp, Telegram, SMS, Slack or email: "Bill the Alvarez matter $3,200 for March." It sends the invoice by email and text with a card or ACH pay link, under your firm's name and logo.
- It works on top of Clio. Casey imports open invoices from Clio and keeps them in sync, so you do not have to replace your practice management system. QuickBooks Online works the same way. See the integrations page.
- Follow-up is timed to the client. Three days before the due date, Casey sends a free reminder. From 4 to 60 days past due, it follows up automatically on the channel and at the time each client tends to respond, and it can offer payment plans and partial payments.
- Collections is built in. At 60+ days past due, one tap sends the invoice to Casey's collections team (AI plus people), who handle calls, formal demand letters, legal notices, payment plans and settlements with your approval.
- Casey asks before anything sensitive. You can pause reminders for any client, which matters in a profession where the relationship often outlasts the invoice.
The cost is simple. Sending invoices and the pre-due-date reminder is free, and invoices paid on time (up to 3 days past due) cost nothing. Casey charges $5 per invoice only if it has to chase it, however many follow-ups it takes. Collections costs 20% of what is recovered, and nothing if nothing is recovered. Details are on the pricing section.
Casey's limits are worth stating plainly. It is not a practice management system and does not replace case management, time tracking or document handling. For trust accounting questions, work out with your state bar how client funds must be handled before you route any payments through any tool, Casey included.
Which should you choose?
Match the tool to the problem you actually have:
- You need one system to run the whole practice: Start with a practice management platform like Clio, MyCase or PracticePanther, and compare what each does for late invoices.
- Your main worry is taking card payments correctly: Look at a payment tool built for legal practices like LawPay, and confirm how it separates trust and operating funds under your state's rules.
- You want accounting and billing together: Look at CosmoLex.
- Clients are paying late and you are tired of chasing: Add Casey on top of what you already use. It is free when clients pay on time, so it costs nothing to have in place.
- You have a large finance team: A team with dedicated billing staff may prefer an enterprise-grade system, and that is a fair choice.
A useful test for any option: ask the vendor what happens to an invoice at 15, 45 and 75 days past due. If the answer is "you send a reminder yourself," you are buying software for creating bills, not for collecting them.
For more on the chasing side, see our guides on getting clients to pay invoices on time, when to send an invoice to collections and what to do when a client refuses to pay. If you want to compare broader options, our roundup of accounts receivable software for small businesses covers them.
To try Casey with your own invoices, sign up here or see the home page.
Frequently asked questions
What is the best invoicing software for a small law firm?
It depends on what you need. Practice management platforms like Clio, MyCase and PracticePanther combine billing with case management, while a tool like Casey focuses on chasing and collecting unpaid invoices and works on top of Clio.
Does Casey work with Clio?
Yes. Casey imports open invoices from Clio and keeps them in sync, so you can add automatic follow-up and collections without replacing your practice management software.
How much does Clio cost?
According to Clio's pricing page as listed in October 2026, plans start at $49 per user per month across four plans: Starter, Core, Signature and Elite. Check the page for current pricing on the upper tiers.
Can I take credit card payments for legal fees?
Many firms do, but trust accounting rules govern which funds can go into which account, and they vary by state. Confirm the rules with your state bar or ethics counsel before choosing a payment tool. This is not legal advice.
What happens to law firm invoices that stay unpaid past 60 days?
With Casey, one tap sends the invoice to its collections team, which handles calls, demand letters, legal notices and payment plans with your approval. Collections costs 20% of what is recovered and nothing if nothing is recovered.