What Is the Difference Between Cash and Accrual Accounting?
Short answer: The difference between cash accounting and accrual accounting is timing. Cash accounting records income when the money arrives and expenses when you pay them. Accrual accounting records income when you earn it and expenses when you incur them, even if no money has moved yet.
Same business, same invoices, different months on the books — and sometimes a different tax year. Most small businesses can pick either method; larger C corporations, and businesses with real inventory, have less choice.
It’s the third week of January and Marcus — I’ll call him Marcus — is looking at two reports for his small landscape design business that cannot both be true. His bank app says December was his worst month of the year. His accounting software, which he once clicked a setting in and has been afraid of ever since, says December was his best.
The culprit is one $4,800 invoice. He sent it on December 18 for a backyard redesign he finished that week. The client paid it on January 9, after what we can only assume was a very relaxing holiday.
Neither report is lying. They’re answering different questions. Once you can see which question each one answers, the choice between cash and accrual stops being jargon and becomes a fairly ordinary business decision.
One invoice, two answers
Take Marcus’s December invoice and run it through both methods. Then add two more ordinary transactions, because a business with one invoice is a hobby.
- 1. The $4,800 invoice, sent December 18, paid January 9. Cash basis counts it in January, when the money lands. Accrual counts it in December, when the work was done and billed. Across a calendar tax year, that’s the difference between this year’s income and next year’s.
- 2. A $600 plant nursery bill, received December 20, paid January 15. Cash basis records the expense in January, when he pays. Accrual records it in December, when he took the plants and owed the money.
- 3. A $1,200 annual design-software subscription, paid December 1. Cash basis says December. Accrual spreads it across the twelve months it covers, $100 a month — and the tax rules for prepaid expenses add their own wrinkle, which we’ll get to.
Under cash, Marcus’s December shows $1,200 out and nothing in. Under accrual, it shows $4,800 in, $700 out. Same man, same mulch, two completely different moods. If you’d like the long version of either method on its own, we’ve written up how cash basis accounting works and how accrual basis accounting works separately. This post is the side-by-side.
Cash vs accrual, side by side
The cleanest way to hold the two in your head: cash basis is checking your bank balance. Accrual basis is checking your bank balance and also opening your mail.
- When income counts. Cash: when you receive it. Accrual: when you’ve earned it and the amount is known, usually when you finish and bill the work.
- When expenses count. Cash: when you pay them. Accrual: when you incur them, meaning you owe the money and the goods or services have been provided.
- What the books track. Cash books mostly track the bank. Accrual books also carry accounts receivable, what customers owe you, and accounts payable, what you owe suppliers.
- What the numbers tell you. Cash tells you how much money you have. Accrual tells you whether you made money. Those are different questions, and a growing business can answer “yes” to the second while the first is quietly alarming.
- Effort. Cash is simpler to keep. Accrual takes more bookkeeping and needs someone to track open invoices and bills every month.
- Outside reporting. Accrual is the basis for GAAP financial statements, which lenders, investors and buyers of a business usually want to see. Cash-basis statements are not GAAP, so the question tends to come up the day a bank asks for financials.
If several of those terms made your eyes slide off the page, our plain-English list of bookkeeping terms covers receivables, payables and the rest without making anyone sit an exam.
How each method moves your tax bill
Your accounting method isn’t just a bookkeeping preference. It decides which year income and deductions land in, and the IRS sets out the rules for both methods in Publication 538, Accounting Periods and Methods.
- Cash: income counts when it’s available to you. That includes money credited to your account or made available without restriction, even if you haven’t withdrawn it. This is called constructive receipt, and it means a check that arrived December 30 is December income whether or not you opened the envelope. Leaving it in a drawer is not a tax strategy; it’s just a drawer.
- Cash: prepaid expenses have a 12-month rule. A prepayment for a benefit that doesn’t extend beyond the earlier of 12 months after it starts or the end of the next tax year can generally be deducted when paid. Marcus’s one-year software subscription fits. A three-year prepayment would not, and gets deducted over the years it covers.
- Accrual: income counts when your right to it is fixed. Under the all events test, you report income once everything that fixes your right to it has happened and the amount can be determined with reasonable accuracy — usually when the job is done and billed, not when the customer pays.
- Accrual: expenses wait for economic performance. You deduct an expense once the liability is fixed and the goods or services have actually been provided. Signing next year’s contract in December doesn’t create a December deduction.
The practical upshot: cash basis gives you a little more control over timing near year end, because paying a bill in December or collecting an invoice in January genuinely changes the year. On accrual, the calendar of the work decides, and the bank doesn’t get a vote.
Who has to use accrual, and who gets to choose
For most owners reading this, the answer is “you get to choose.” The rules that force accrual are aimed at much bigger companies and at businesses that hold inventory.
- Sole proprietors, S corporations and most partnerships. Free to use either method, regardless of size, as long as it clearly reflects income.
- C corporations and partnerships with a C corporation partner. Can use cash only while they pass the gross receipts test. For tax years beginning in 2026, that means average annual gross receipts over the prior three tax years of no more than $32,000,000, per Revenue Procedure 2025-32. The figure is indexed for inflation and moves most years.
- Tax shelters. Can’t use the cash method at all, whatever their size.
- Businesses with inventory. If you keep an inventory, you generally use accrual for purchases and sales. Small business taxpayers under the same gross receipts threshold can choose not to keep an inventory in the traditional sense, but still need a method that clearly reflects income.
If your business averages more than $32 million a year, congratulations, and also you probably have a controller who would like you to stop reading accounting blogs at 11pm. For everyone else, the IRS is mostly out of this decision. Your business model is in it.
Which method fits your business
We’re accountants, so you may have braced yourself for “it depends.” It does. But here is exactly what it depends on.
- Cash basis usually fits if you get paid on the spot. Consultants, trades and personal services paid at the end of the job, with few unpaid bills and no inventory, gain very little from accrual. Their bank balance and their profit are close cousins anyway.
- Accrual usually fits if you invoice on terms. Net-30 or net-60 invoices, retainers, deposits and big multi-month projects make cash-basis months swing wildly. A great month can look like a disaster and the reverse.
- Accrual fits if someone outside needs your numbers. Lenders, investors and anyone buying the business will want statements that match income to the period it was earned.
- Accrual fits if you make decisions from the reports. Hiring, pricing and “can we afford the new truck” are better answered by true monthly profit than by a bank balance that rises and falls with when clients feel like paying.
The honest part: if you’re a solo or small service business, paid promptly, with no inventory and no lender asking for GAAP statements, cash basis is probably fine and you don’t need anyone, including us, to switch you. Decent software and a monthly bank reconciliation will carry you a long way. Our post on why accounting matters in a small business covers what those monthly habits buy you.
Switching methods without making a mess
Changing accounting methods is a bit like changing which side of the road you drive on. Entirely doable. Best done on a quiet morning with a plan, rather than halfway across an intersection.
- 1. You generally need IRS approval. Changing your overall method is requested on Form 3115, Application for Change in Accounting Method. You can’t simply start filing the other way one year.
- 2. Expect a one-time catch-up. Moving from cash to accrual means invoices you’d already billed but not collected suddenly count. The change comes with an adjustment so nothing is taxed twice or slips through untaxed, and how it’s handled depends on the change.
- 3. Start at the top of a tax year. A clean cutover date, with a list of every open invoice and unpaid bill on that date, makes the switch auditable instead of archaeological.
- 4. Preview it before you commit. Most accounting software can show the same transactions on either basis with a report setting. Looking at last year both ways tells you what the change would actually do.
There’s also a middle path. The IRS allows a hybrid method, mixing cash and accrual, if the combination clearly reflects income and you stick with it. The classic version is accrual for inventory and cash for everything else.
What the wrong method quietly costs
Back to Marcus and his December invoice. On cash basis, his December looked so bad he nearly turned down a January job to “get his costs under control.” His costs were fine. His client was just on holiday.
Flip it around. On accrual, that $4,800 is this year’s income even though it’s sitting in someone else’s account on December 31. At an illustrative 22% federal bracket, that’s $1,056 of income tax on money he hasn’t received yet, before self-employment tax. Neither outcome is a disaster. Both are the kind of surprise that makes owners stop trusting their own numbers.
That is the real cost of a method chosen by accident: not a penalty, but a year of decisions made from the wrong report.
Frequently asked questions
- What is the difference between cash accounting and accrual accounting?
- Cash accounting records income when money is received and expenses when they are paid. Accrual accounting records income when it is earned and expenses when they are incurred, whether or not any money has moved. The same invoice can land in different months, or different tax years, depending on the method.
- Which is better, cash or accrual accounting?
- Neither is better in general. Cash basis is simpler and shows what is actually in the bank, which suits many small service businesses. Accrual basis shows true profit for each period, which matters more once you invoice on payment terms, carry inventory, or need financial statements for a lender or investor.
- Can a small business use cash basis accounting?
- Usually, yes. Sole proprietors, S corporations and most partnerships can use the cash method regardless of size. C corporations and partnerships with a C corporation partner can use it only while they pass the IRS gross receipts test, and tax shelters cannot use it at all.
- What is the gross receipts limit for the cash method in 2026?
- For tax years beginning in 2026, a corporation or partnership passes the test if its average annual gross receipts for the prior three tax years do not exceed $32,000,000, per IRS Revenue Procedure 2025-32. The figure is indexed for inflation and changes most years, so check the current revenue procedure before relying on it.
- Does accrual accounting mean I pay tax on money I have not received yet?
- Generally, yes. Under the accrual method you report income once all events fixing your right to it have occurred and the amount can be determined with reasonable accuracy, which is usually when you finish the work and bill it. If the customer pays next year, the income still belongs to the year it was earned.
- Can I switch from cash to accrual accounting?
- Yes, but you generally need IRS approval to change your overall accounting method, and you request it by filing Form 3115. The switch usually comes with a one-time adjustment so income is not counted twice or skipped, so it is worth planning for the start of a tax year rather than doing it mid-stream.
- What is a hybrid accounting method?
- A hybrid method combines cash, accrual and special methods, which the IRS allows if the combination clearly reflects income and you use it consistently. A common example is a business that must use accrual for inventory purchases and sales but uses cash for everything else.
- What are the benefits of accrual accounting?
- Accrual accounting matches income to the period it was earned and expenses to the period they relate to, so each month shows a true profit. It also tracks what customers owe you and what you owe suppliers, and it is the basis for GAAP financial statements that lenders and investors usually expect.
More plain-English answers.
- Blog
Cash Basis Accounting: What It Is and When It Works
Counting money when it moves, who has to switch to accrual, and when it is smart to switch anyway.
Read more - Blog
Accrual Basis Accounting: What It Is and How It Works
Why accrual books can show a profit while your bank account disagrees, and who has to use them.
Read more - Blog
Bookkeeping vs. Accounting: What Is the Difference?
Who records the transactions, who interprets them, and which one a small business actually needs.
Read more
Not sure which method your books are on?
Book a free 15-minute discovery call with Njock. No pitch. We just listen, look at what you have, and tell you honestly whether we’re a fit. Our monthly bookkeeping services run on whichever method fits your business, start at $299 a month, and every price is on the pricing page.
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