Cash vs Accrual Accounting: Which One Should You Run On?

The Difference in One Sentence

Cash basis records revenue when money arrives and expenses when money leaves. Accrual basis records revenue when you earn it and expenses when you incur them, regardless of when cash moves.

That's it. Everything else is consequences.

A Concrete Example

You run a services business. In December you invoice a client $30,000 for work done in December. They pay in January.

• Cash basis: December shows no revenue. January shows $30,000. December looks bad, January looks great, and neither is quite true.
• Accrual basis: December shows $30,000 of revenue (earned then) and a $30,000 receivable until the cash lands in January. December's P&L reflects the work actually done.

Same business, same cash, two different stories. The accrual story matches reality.

Why Cash Basis Is Tempting

It's simple. Money in, money out. Your books mirror your bank account, which feels intuitive.

Tax timing. Cash-basis taxpayers generally recognize income when received, which can defer tax. For many small businesses this is the deciding factor, and it's a legitimate one. Talk to your CPA.

It's what QuickBooks defaults to feeling like. Many small businesses are effectively cash-basis without ever having made the decision.

Why Accrual Wins as You Grow

It matches revenue to the costs that produced it. If you pay annual insurance in January, cash basis makes January look terrible and the other eleven months artificially good. Accrual spreads the cost across the year it covers. Margins become meaningful month to month.

It's what anyone reading your numbers expects. Investors, lenders, acquirers, and (above certain revenue thresholds) the IRS all expect accrual financials. Showing up to a fundraise or a loan application with cash-basis books signals "early."

It surfaces the real obligations. Cash basis is blind to what you owe and what's owed to you. Accrual puts AR and AP on the balance sheet, where you can manage them.

The Rules of Thumb

Cash basis is usually fine when: you're a small services business with simple transactions, minimal inventory, no outside investors, and your CPA confirms the tax treatment works for you.

You should be on accrual when: you carry inventory, you invoice clients with payment terms, you have investors or plan to raise, you're applying for serious credit, or you're approaching the IRS gross-receipts threshold (the Tax Cuts and Jobs Act set it at $25M, indexed; most SMBs stay eligible for cash basis, but eligibility isn't the same as it being the right choice).

The practical trigger: the moment someone outside your company needs to trust your monthly P&L (a bank, an investor, a buyer), accrual stops being optional in practice.

The Hybrid Reality

Many businesses file taxes on a cash basis but keep their management books on an accrual basis. This is normal and legal. Your CPA makes the conversion at tax time. You get decision-grade numbers all year and keep the tax treatment.

Switching Without the Mess

Moving from cash to accrual is mostly a one-time setup exercise:

1. Record opening AR and AP: everything owed and owing at the switch date
2. Set up recurring accrual entries: depreciation, prepaid amortization, payroll accruals
3. Change invoicing and bill workflows so revenue and expenses post when earned/incurred
4. Brief whoever reads the reports: the numbers will shift, and someone should know why January looks different now

The IRS requires Form 3115 for an accounting-method change on the tax side. That's your CPA's lane, and it's routine.

What We Tell Clients

Run your management books on accrual as early as you can tolerate the discipline. It costs a little more bookkeeping effort each month and pays you back every time you need your numbers to mean something to someone else. If you're not sure which basis your books are actually on right now (many owners aren't), that's worth a fifteen-minute look, and we're happy to do it.