Cash vs. Accrual Accounting for Law Firms: Which Method Should You Use?

One of the first decisions a law firm makes about its books is which accounting method to use. The choice affects when income and expenses show up on financial statements, how profitable the firm appears in a given month, and, in many cases, how much tax the firm owes for the year.

Most small law firms use the cash method. However, cash-basis reports do not always show the full picture of how a practice is performing. Understanding both methods helps attorneys read their reports correctly and make better decisions.

What Is Cash-Basis Accounting?

Under the cash method, income is recorded when payment is received, and expenses are recorded when they are paid.

If a firm bills a client $10,000 in November but the client does not pay until January, the income appears in January. If the firm receives a vendor invoice in December but pays it in January, the expense also appears in January.

The cash method is simple, closely tracks the bank balance, and is the method most small law firms use for tax purposes.

What Is Accrual-Basis Accounting?

Under the accrual method, income is recorded when it is earned and billed, and expenses are recorded when they are incurred, regardless of when money changes hands.

Using the same example, the $10,000 invoice would be recorded as income in November, and the unpaid vendor bill would be recorded as an expense in December.

Accrual accounting matches revenue to the period in which the work was done. That makes it easier to see whether the firm was truly profitable in a given month or quarter.

How Each Method Affects a Law Firm

Law firms have a few characteristics that make the difference between the two methods especially noticeable.

Accounts receivable can be large

Many firms carry significant unpaid invoices at any given time. On a cash basis, those receivables do not appear as income at all. A firm can have a very productive month that looks weak on a cash-basis profit and loss statement simply because clients have not paid yet.

Contingency fees are paid in large, irregular amounts

Personal injury and other contingency-fee firms may go months with little fee income and then receive a large settlement fee. On a cash basis, income swings sharply from month to month. Neither method fully solves this, but understanding cash timing is critical for planning.

Trust money is never firm income

Under either method, client funds held in trust are not income to the firm. Retainers and advance fees held in the trust account belong to the client until they are earned and properly transferred to operating. A common bookkeeping error is recording trust deposits as revenue. Read more in our article on how law firms should handle retainers and advance fees.

Advanced client costs need careful treatment

Filing fees, expert fees, and other costs the firm advances on behalf of clients are often tracked as amounts the client owes rather than ordinary firm expenses. How these costs are treated can differ for books and taxes, so firms should confirm the approach with their CPA.

Which Method Can a Law Firm Use for Taxes?

Many small law firms are eligible to use the cash method for federal income tax purposes. Sole proprietors, partnerships, and S corporations without C corporation partners generally qualify, as do many professional service corporations and businesses that fall under the IRS gross receipts threshold, which is adjusted annually for inflation.

Some larger firms or firms with certain ownership structures may be required to use the accrual method. Changing methods usually requires IRS approval, so this decision should always be made with a CPA.

Advantages of the Cash Method

• Simple to maintain and easy to understand
• Income is not taxed until the firm actually collects it
• Reports align closely with the bank balance
• Fits the way most small practices already operate

Advantages of the Accrual Method

• Shows profitability based on the work actually performed
• Makes month-to-month comparisons more meaningful
• Highlights unpaid invoices and unpaid bills on the balance sheet
• Often preferred by lenders, buyers, and partners evaluating the firm

Why Many Firms Review Both

A firm does not have to choose one view for every purpose. Many small firms file taxes on a cash basis but also review accrual-basis reports, or at least review accounts receivable alongside a cash-basis profit and loss statement.

Most accounting software, including QuickBooks Online, can run the same report on either basis. Looking at both helps answer two different questions:

• Cash basis: How much money actually came in and went out?
• Accrual basis: How much work did the firm do, and was it profitable?

For a list of reports worth reviewing each month, see our guide to the financial reports every small law firm should review monthly.

Common Mistakes to Avoid

• Recording trust deposits as firm income
• Mixing methods in the books without a clear reason
• Judging a month’s performance by cash collections alone
• Ignoring a growing accounts receivable balance
• Changing accounting methods for taxes without CPA guidance

Get Clear Financial Reports for Your Firm

A&W Associates provides bookkeeping, trust accounting, and payroll services for law firms in Wesley Chapel, Tampa, and throughout the Tampa Bay area. We set up your books so you can see both your cash position and your true profitability, and we work alongside your CPA at tax time.

Contact A&W Associates to talk about getting your firm’s financial reports in order.

This article is provided for general informational purposes and does not constitute legal or tax advice. Law firms should consult a CPA or tax advisor about which accounting method applies to their practice.