Cash vs Accrual Accounting: When Your One-Person Business Should Switch

Cash vs accrual accounting is a question of timing. Cash accounting records income when the money hits your account and expenses when you pay them, while accrual accounting records income when you earn it and expenses when you incur them, even if no cash has moved yet. Most one-person businesses can start on cash, but you should switch your management books to accrual once unpaid invoices, bills or inventory start hiding what’s really going on.

You’ll also see this asked as “cash basis vs accrual basis,” “cash method vs accrual method” or “which accounting method should my small business use.” Same decision. This is education, not tax advice. Changing your tax accounting method is CPA territory, so loop one in before you file anything.

What’s the difference between cash and accrual accounting?

Here’s the simplest example I can give you. Say you finish a $10,000 project for a client in December. They pay you in January.

• Cash basis: the $10,000 shows up in January, because that’s when you got paid.
• Accrual basis: the $10,000 shows up in December, because that’s when you earned it. Until they pay, it sits on your books as accounts receivable.

Same money. Same client. Two different pictures of December. The IRS lays out both methods in Publication 538, and the definitions there are worth reading once so you’re not guessing.

Why cash accounting feels great and then lies to you

Cash basis is simple. You look at your bank account and you basically know where you stand. For a freelancer who gets paid the day the work is done, it’s honest enough.

The problem starts when timing gets messy. You land a big client, do three months of work and get paid in month four. On cash basis, months one to three look like you’re broke and month four looks like you’re a genius. Neither is true.

It works the other way too. You collect a year of prepaid subscriptions in January and feel rich. You haven’t earned most of that yet. You still owe the customer eleven months of work. Spend it like profit and you’ll feel it in October.

That’s the gap I keep pointing at: knowing the number in your bank account isn’t the same as knowing your business. You can’t make good calls on hiring, pricing or ad spend if the report you’re reading is off by a quarter.

When should a one-person business switch to accrual?

This is the part most guides skip. Here’s the switch list I’d use for your management books, the numbers you run the business on.

1. You invoice and wait to get paid. If you regularly have more than a few weeks of unpaid invoices, accrual shows you what you actually earned.
2. You have bills you pay later. Contractors, software on net-30 terms, a big annual expense. Accrual matches costs to the month they belong to.
3. You sell physical products. Inventory ties up cash before you make a sale. Accrual shows real margins.
4. You take prepayments or retainers. Cash basis makes money you haven’t earned look like profit.
5. You plan to raise money, borrow or sell. Investors, lenders and buyers usually want accrual financials. Starting late means a painful clean-up right when you’re busiest.
6. You hired help. Once payroll and contractors are in the mix, the timing swings get bigger and more expensive.

If none of those apply, cash is probably fine for now. Don’t add complexity you don’t need. But be honest with yourself about number five. Most people say “someday” and then scramble when someday shows up.

Cash vs accrual for taxes: the rules that matter

Running your business on accrual and filing your taxes on accrual are two different decisions. People mix them up all the time.

For taxes, plenty of small businesses can use the cash method. Under the gross receipts test in tax code section 448(c), a corporation or partnership qualifies for tax years beginning in 2026 if its average yearly gross receipts over the prior three tax years don’t exceed $32 million, per IRS Revenue Procedure 2025-32. That number is adjusted for inflation each year, so check the current figure when you file.

A few things can still push you toward accrual for tax:

• A C corporation, or a partnership with a C corporation partner, that fails that gross receipts test
• Entities treated as tax shelters, which can’t use the cash method at all
• Inventory rules, though smaller businesses that pass the same gross receipts test have simpler options

Some owners keep monthly management reports on accrual while their CPA handles the tax return on cash. Whether that setup works for you is a question for your CPA, because the IRS expects your tax method to be used consistently and to clearly reflect income.

How do you change your accounting method with the IRS?

Changing your tax accounting method usually means filing Form 3115 to get the IRS’s consent, along with an adjustment that catches up the timing difference between the old method and the new one. Don’t try to DIY this. A CPA can tell you whether your change qualifies for automatic consent and how the catch-up hits your taxable income.

Who should keep your books once you switch?

Accrual books take more work. You’re tracking who owes you, who you owe and when revenue is actually earned. That’s usually the point where a bookkeeper stops being a luxury. If you’re not sure who to hire first, I broke down the accountant vs bookkeeper decision for small teams.

Your software can usually run reports either way. Most popular accounting tools let you flip a report between cash and accrual so you can compare. Do that once a month. The gap between the two reports tells you how much of your “profit” is still sitting in someone else’s bank account.

And if reading those reports still feels like a foreign language, start with the basics on how to understand your business finances before you worry about the method. A clean set of books on either method beats a messy set on the “right” one.

My take

Start simple. Cash is fine when you’re getting paid on the spot and the business is just you. The moment invoices, inventory, prepayments or hiring show up, move your management books to accrual so you’re steering by the truth, not by your bank balance. Then let a CPA decide what your tax return should use. Most owners who get blindsided by a cash crunch weren’t short on revenue. They were reading the wrong report.

Frequently asked questions about cash vs accrual accounting

Which is better, cash or accrual accounting?

Neither is better for everyone. Cash is simpler and fine for many very small businesses. Accrual gives a truer picture of profit once you have invoices, bills, inventory or prepayments.

Can a small business use cash accounting for taxes?

Often, yes. For tax years beginning in 2026, corporations and partnerships generally qualify if average gross receipts for the prior three years don’t exceed $32 million, though other rules can apply. Confirm with a CPA.

Do I need IRS permission to switch from cash to accrual?

Usually, yes. Changing your tax accounting method generally requires filing Form 3115. A CPA can tell you whether the change qualifies for automatic consent.

Does accounting software use cash or accrual?

Most accounting software can show reports on either basis. The method that matters for taxes is the one you file under, not the report toggle.

Do businesses with inventory have to use accrual accounting?

Not always. Smaller businesses that pass the gross receipts test have simpler inventory options. Larger businesses with inventory generally use accrual for purchases and sales.

What is modified cash basis accounting?

It’s a hybrid used for internal reporting that tracks most items on cash but records some, like fixed assets or loans, on accrual. It isn’t a separate IRS tax method, so ask your CPA before relying on it.