The Solo Attorney Practice Billing Guide: Rates, Invoices, and Payments
Learn how to set billing rates, create invoices, and collect payments efficiently as a solo attorney. Practical steps and realistic figures for 2026.
Setting up billing for a solo practice is about more than just picking an hourly rate. You need a system that gets you paid on time, keeps clients informed, and complies with ethical rules. This guide covers the three pillars: setting rates, creating invoices, and processing payments. You’ll get concrete numbers and steps you can implement this week.
Setting Your Billing Rates
Your rate should cover your costs, desired profit, and market position. Start by calculating your overhead. For a solo attorney, overhead typically ranges from $3,000 to $8,000 per month, including rent, software, malpractice insurance, and marketing. Add your desired annual salary, say $100,000 to $150,000, plus taxes and benefits. Then divide by your billable hours. Most solos bill 1,200 to 1,500 hours per year, after accounting for admin and marketing.
Here’s a simple formula: (Annual overhead + desired salary) / billable hours = hourly rate. For example, if overhead is $60,000 and salary is $120,000, total is $180,000. Divide by 1,300 hours, and you get about $138 per hour. But market rates vary by practice area and location. In 2026, typical solo rates are:
- General practice: $150-$250 per hour
- Family law: $200-$350 per hour
- Criminal defense: $150-$300 per hour
- Estate planning: $200-$400 per hour (often flat fees)
- Corporate/contracts: $250-$450 per hour
Check rates in your area using state bar surveys or sites like Martindale-Hubbell. If you’re new, start at the lower end and raise rates as you gain experience.
Creating Clear Invoices
Your invoice must be detailed enough to avoid disputes and ethical issues. Include the client’s name, matter number, date, description of services, hours, rate, and total. Break down expenses separately. Use plain language, not legalese. For example, instead of “Reviewed discovery documents,” write “Reviewed 50 pages of plaintiff’s responses to interrogatories.”
Most solo attorneys use practice management software with built-in billing. Options include:
- Clio: $49-$129 per month
- MyCase: $49-$99 per month
- PracticePanther: $49-$99 per month
- QuickBooks Time: $20-$40 per month (if you need time tracking only)
These tools let you create invoices, track payments, and automate reminders. If you’re on a budget, you can start with a spreadsheet and PayPal, but software saves hours and looks more professional.
Payment Methods and Processing
Clients expect to pay by credit card, ACH, or e-check. You’ll need a merchant account or a payment processor. Many practice management tools integrate with processors like LawPay, which is designed for legal trust accounting. LawPay charges a flat rate of 2.95% for credit cards and 1% for ACH, with no monthly fee. Alternatively, Stripe charges 2.9% + $0.30 per transaction, but you must ensure compliance with IOLTA rules.
Set up a clear payment policy. Require a retainer upfront, typically $1,500 to $5,000 depending on the case type. For ongoing work, invoice monthly and set due dates of 14 days. Send reminders automatically: a gentle email at 7 days past due, a phone call at 14 days, and a final notice at 30 days. If a client doesn’t pay, you may withdraw from the case, but follow your state’s ethics rules.
Handling Trust Accounting
If you handle client funds, you must have a separate IOLTA account. Never mix client money with operating funds. When you receive a retainer, deposit it into the trust account and transfer earned fees to your operating account only after you’ve done the work and sent an invoice. Use software like Clio or QuickBooks to track trust balances. Reconcile monthly to avoid errors. This is non-negotiable: trust accounting errors can lead to disciplinary action.
Practical Steps for This Week
- Calculate your hourly rate using the formula above. Adjust based on your market.
- Choose a billing software. Sign up for a free trial of Clio or MyCase.
- Set up a payment processor. If you don’t have one, open a LawPay account.
- Create an invoice template with your firm’s logo, your contact info, and a clear breakdown.
- Write a payment policy document and include it in your engagement letter.
- Open an IOLTA account if you don’t have one. Check your state’s rules for the required bank.
FAQ
Q: Should I use flat fees or hourly billing? A: Flat fees work well for predictable services like simple wills or uncontested divorces. They give clients certainty and reduce your billing admin. Hourly is better for complex litigation where scope is unclear. Many solos use both: flat fees for routine matters, hourly for litigation.
Q: How do I handle late payments? A: Send a reminder at 7 days past due, then a phone call at 14 days. At 30 days, consider stopping work and sending a formal demand letter. If the client still doesn’t pay, you may withdraw, but get court approval if you’re in litigation. Always follow your state’s rules.
Q: Can I charge for emails and phone calls? A: Yes, if they are substantive. Many attorneys bill in six-minute increments. For example, a 10-minute call is 0.2 hours. But don’t nickel-and-dime clients for short administrative questions. Use your judgment.
Q: What is the best way to collect a retainer? A: Ask for a retainer before starting work. For new clients, collect it at the initial consultation. Use a credit card or ACH to make it easy. For larger retainers, offer a payment plan, but ensure the retainer covers at least the first month’s work.
The Bottom Line
Billing is a skill you can learn. Set a rate that covers your costs and reflects your value. Use software to create clear invoices and track payments. Establish a payment policy and stick to it. Trust accounting is critical, so get it right from day one. By taking the steps above this week, you’ll build a billing system that keeps your cash flow healthy and your practice compliant.
Remember, your time is your product. Bill it accurately, invoice promptly, and collect relentlessly. Your practice depends on it.