The Accrual Method Isn't Optional: A Field Guide for Bookkeepers

There's a misconception that bookkeeping is just data entry — that you can pick cash basis for your client and call it a day. Wrong. If you're bookkeeping for any business that will ever need a loan, an audit, or a sale, cash basis is a trap. Under U.S. GAAP, accrual accounting isn't a choice; it's the only acceptable way to present financial statements (GAAP). And if you're thinking, "But my client is a tiny LLC, they're cash basis," hear me out. Even if you're only doing tax returns, the books that feed those returns are better off on accrual.

This guide is for the working bookkeeper — the one with five clients who all have messy receipts and a payroll due Friday. We're going to walk through the actual steps of setting up and maintaining accrual books, and I'll show you what can go wrong if you skip a step. At the end, you'll see why the single best move you can make is to switch every client to accrual — before the IRS or a banker forces you to.

Set Up the Chart of Accounts for Accrual

First, stop thinking in terms of "income" and "expenses" only. Accrual bookkeeping introduces a whole new cast of characters: accounts receivable, accounts payable, prepaid expenses, unearned revenue, and accumulated depreciation (GAAP). These aren't just fancy names — they're the accounts that let you record revenue when it's earned and expenses when they're incurred, not when cash moves.

When I onboard a new client, I build a chart of accounts that groups everything into assets, liabilities, equity, revenue, and expenses (Accounting terminology). But I don't stop there. I make sure every revenue and expense account has a corresponding balance sheet account. For example, if you invoice a client, you need an accounts receivable account to debit. If you pay rent in advance, you need a prepaid rent account. If a customer pays you before you deliver, that's unearned revenue. If you buy a $5,000 computer, you need accumulated depreciation — not just a one-time expense.

Here's the practical part: when you set up the accounts, you're also setting up the rules. I make it a habit to define each account's normal balance and what kind of transaction goes there. That way, when I'm in a hurry at month-end, I don't accidentally post a loan payment to "office expenses." A chart of accounts is your map; if it's sloppy, you'll get lost.

Record Transactions as Debits and Credits — Every Time

Double-entry bookkeeping is non-negotiable. Every transaction gets a debit and a credit, and total debits must equal total credits (GAAP). I know, I know — you've seen the single-entry spreadsheets that some clients use, and they work for a while. But the moment you have a receivable or a payable, single-entry falls apart. You can't track who owes you money if you only record cash in and cash out.

Let me give you a concrete example. Say you invoice a customer for $1,000 on March 15, and they pay you on April 10. Under cash basis, you'd record nothing in March and $1,000 in April. Under accrual, in March you debit accounts receivable $1,000 and credit revenue $1,000. In April, you debit cash $1,000 and credit accounts receivable $1,000. That's it. But that simple difference changes your March income statement — and your March balance sheet shows you're owed $1,000. If you're trying to get a loan in April, that receivable is an asset. If you'd recorded cash basis, your March books would show zero revenue, which might make your business look dead.

Now, what can go wrong? The biggest mistake I see is when bookkeepers record a transaction as a debit to expense and a credit to cash, but forget the other side. For example, paying an insurance premium upfront for six months. If you expense the whole $1,200 in January, your January income statement looks terrible, and your balance sheet doesn't show the remaining $1,000 of coverage you've already paid for. That's not just inaccurate — it's misleading. The matching principle says you should recognize the expense in the same period as the revenue it helps generate (GAAP). In this case, the insurance protects your business over six months, so you should allocate $200 to each month.

Quick tip: Before you close the books each month, run a trial balance. It lists every account's balance and tells you if debits equal credits (Accounting terminology). If they don't, you've got a posting error. Fix it before you move on.

Handle the Tricky Accounts: Receivables, Payables, and Depreciation

Once you've mastered the basics, get comfortable with the balance sheet accounts that make accrual different. Accounts receivable is money owed to you — record it when you invoice, and clear it when cash arrives. Accounts payable is money you owe — record it when you receive a bill, not when you pay it. Prepaid expenses are assets — you pay cash upfront but the benefit comes later. Unearned revenue is a liability — you've taken cash but still owe the work.

Depreciation is where I see people panic. You buy a vehicle for $30,000 that has a useful life of five years. Instead of expensing the whole $30,000 in the year of purchase, you allocate its cost over that useful life using a method like straight-line or declining balance (Accounting terminology). Straight-line is simple: $30,000 divided by five years is $6,000 per year. You debit depreciation expense and credit accumulated depreciation, which is a contra-asset that reduces the vehicle's book value.

What can go wrong here? Forgetting to record depreciation at all. If you're bookkeeping for a construction company with a fleet of trucks, and you don't depreciate them, your assets are overstated and your expenses are understated. Your client might think they're profitable when they're not — and then they get a surprise tax bill when they sell the truck and owe depreciation recapture. I've seen a business take out a loan based on inflated asset values, and when the bank did an audit, the whole thing unraveled.

Reconcile Monthly and Review the Financial Statements

At the end of each month, reconcile everything. Bank statements, credit card statements, loan statements — match them to your books. This isn't just about catching errors; it's about catching timing differences. If you've recorded a check that hasn't cleared, that's fine, but you need to know it's outstanding. If you've recorded a deposit that hasn't posted, same thing.

After reconciliation, generate the three core financial statements: the income statement, the balance sheet, and the statement of cash flows (Accounting terminology). And here's the thing — don't just file them away. Review them for anomalies. Is accounts receivable growing faster than revenue? Maybe you have a collection problem. Is accounts payable ballooning? Maybe you're running out of cash. The balance sheet is where accrual accounting reveals the health of the business.

Now, I'm not saying you need to be a CPA to do this. But you do need to understand the accounting equation: assets equal liabilities plus equity (Accounting terminology). If that doesn't balance, you've got a problem. And when you're reviewing the income statement, remember that under accrual, revenue is recognized when performance obligations are satisfied — not when cash hits the bank (GAAP). So if you're looking at a month with no cash but lots of revenue, that's a red flag for cash flow, even if the income statement looks great.

What can go wrong if you skip this review? You miss the fact that a client's "profit" is actually tied up in unpaid invoices. I once had a client who was thrilled that their income statement showed a $50,000 profit, but their bank account was overdrawn. Why? Because they had $80,000 in accounts receivable that hadn't been collected. If I hadn't reconciled and looked at the balance sheet, they would have kept spending money they didn't have.

Sources

• GAAP - https://www.fasb.org
• Accounting terminology - https://en.wikipedia.org/wiki/Accounting
• IRS - https://www.irs.gov

Bottom line: The single best move you can make as a bookkeeper is to switch every client to accrual accounting today, before a banker, an auditor, or the IRS forces you to. It's not just about compliance — it's about giving your clients financial statements that actually reflect their business's performance and position.