Accrual Basis Accounting: What It Is and How It Works
Short answer: accrual basis accounting is a bookkeeping method that counts income the day you earn it — the job’s done, the invoice goes out — and counts expenses the day you incur them, whether or not cash has actually moved yet. It’s the method GAAP requires, the one a bank or investor expects to see, and past a certain size or business structure, the one the IRS requires too.
One catch: it can tell you that you had a great quarter while your checking account is telling you something else entirely.
It’s the second week of April and Elena — I’ll call her Elena — runs a landscaping and hardscaping company, and she’s just closed her books for the quarter. Net profit: $42,000. A genuinely great number, the kind you’d frame.
Her checking account has $3,200 in it.
She isn’t failing, and she isn’t imagining the profit — it’s real, on paper. She’s just found the exact gap accrual accounting is built to create, and nobody warned her it would feel like this the first time.
What accrual basis accounting actually means
It’s the opposite instinct from checking your bank balance. Under accrual, the books track when value actually changed hands in the business sense — work performed, obligation created — not when a deposit clears or a payment goes out.
- Income counts on the day it’s earned. For Elena, that’s the day a paver job is finished and the invoice goes out — not the day the client actually pays it.
- Expenses count on the day they’re incurred. A supplier bill counts the day the stone is delivered and the obligation is real, whether or not she’s cut the check.
- Accounts receivable and payable live in the books themselves. Unlike cash basis, what people owe you and what you owe them aren’t a side note — they’re part of the official picture, tracked on the balance sheet as they build up.
- It’s one of a few types of financial accounting a small business can choose from. Cash basis and modified cash basis are the other two you’ll run into, and each trades some of accrual’s accuracy for some of cash basis’s simplicity.
Accrual vs. cash accounting, in one example
Take one of Elena’s jobs and watch what each method does with it.
- 1. Her crew finishes a $9,000 patio installation on March 15. Under both methods, the work is done. Nothing else about the two methods agrees from here on.
- 2. She sends the invoice that same day, net 30. Under accrual, this is the moment the $9,000 counts as income — the job is complete and the amount is determinable, so it’s earned.
- 3. Under cash basis, nothing has happened yet. Her March cash-basis books show none of that $9,000, no matter how finished the patio is.
- 4. The client pays on April 10. Only now does cash basis record the income — nearly a full month after accrual already had.
That gap is the whole idea. Accrual puts the $9,000 in March, where the work actually happened, so a March profit-and-loss statement reflects March’s real performance instead of whichever invoices happened to get paid that month.
The matching principle and the rules behind the timing
Accrual isn’t just “count it early.” It runs on specific rules about exactly when income and expenses are allowed to count, and they exist so two different accrual bookkeepers land on the same number.
- The matching principle. Expenses get recorded in the same period as the revenue they helped produce. The stone Elena buys in March for an April job is recognized as a cost of April’s revenue, not March’s cash outlay — the two numbers move together instead of landing in different months.
- The all-events test, for income. Under the IRS’s rule for accrual-method taxpayers, income counts once all events fixing your right to receive it have happened and the amount can be determined with reasonable accuracy — for Elena, that’s the finished job and the issued invoice, not the payment.
- Economic performance, for expenses. You generally can’t deduct or record a business expense until the property or service has actually been provided to you — a bill for stone that hasn’t been delivered yet isn’t an expense, no matter when the invoice arrived.
- Inventory doesn’t get expensed on purchase. Stone and pavers Elena buys and stockpiles sit on the balance sheet as an asset until she actually uses them on a job — only then does their cost move to the profit-and-loss statement, matched against the revenue they helped create.
Who has to use accrual (and who gets to choose)
For most small businesses, accrual is a choice about which picture serves them better, not an IRS order. A few structures don’t get that choice.
- C corporations, and partnerships with a C-corp partner. Required to use accrual once average annual gross receipts over the prior three tax years cross a threshold the IRS indexes for inflation every year. Cross it, and cash basis stops being available.
- Businesses with real inventory. Generally required to use accrual for purchases and sales, since the IRS treats inventory as necessary to accurately account for income — with a small-business exception tied to that same gross-receipts threshold.
- Tax shelters. Barred from the cash method regardless of size or structure.
- Sole proprietors, most partnerships, and S corporations. Free to use either method at any size, as long as no C corporation sits in the ownership structure. This is where Elena’s business falls — nothing forces her onto accrual. She chose it.
If none of the restricted categories fit you, this is a genuinely optional decision, not a compliance deadline. If growth eventually pushes you across the threshold, the switch itself runs through Form 3115, Application for Change in Accounting Method, generally filed with the return for the year of the change. See what our bookkeeping and tax service actually covers if you’re weighing whether to sort this out yourself or hand it off.
The benefits of accrual accounting — and what they cost you
None of this is free. Every benefit below is real, and every one of them takes more bookkeeping than cash basis to get.
- It shows you the truth about a given period. Elena’s March P&L reflects March’s actual work, not whichever invoices a client happened to pay that month — which makes month-to-month and year-over-year comparisons mean something.
- It’s the only method GAAP allows. A bank underwriting a loan, an investor doing diligence, or a buyer evaluating the business will ask for accrual statements — cash basis numbers won’t satisfy them.
- It surfaces margin problems earlier. Because costs are matched to the job that caused them, a thin-margin contract shows up thin immediately, instead of getting buried in a month where a different job’s payment happened to land.
- The cost: it demands real bookkeeping discipline. Invoices and bills have to be entered when they’re issued, not just when they’re paid, and receivables and payables need to be tracked and reconciled on an ongoing basis. Skip that, and the numbers quietly go wrong — see our flat monthly plans if you’d rather that reconciling wasn’t on you.
What accrual can hide: profitable on paper, empty in the bank
This is the blind spot that had Elena staring at a $42,000 profit and a $3,200 checking account. It isn’t a bug in her books. It’s exactly what accrual is built to do, which is separate profit from cash — and that separation cuts both ways.
- Unpaid invoices count as income before the cash arrives. $28,000 of Elena’s quarterly profit sat in invoices her commercial clients hadn’t paid yet — real, earned, and entirely unspendable that week.
- Inventory purchases don’t touch the P&L when you buy them. She spent $19,000 stocking stone for next quarter’s jobs — real cash out the door, but it sits as an asset on the balance sheet, not an expense, until it’s actually used.
- Loan principal payments aren’t an expense at all. A $6,000 payment on her equipment loan reduced her cash by $6,000 and her profit by nothing — only the interest portion is an expense; principal is a balance-sheet transaction under accrual, full stop.
- It can quietly hide a real cash crunch. A string of strong-looking accrual quarters can mask that payroll is due before the receivables clear, which is how genuinely profitable businesses end up scrambling for a short-term loan.
What guessing instead of knowing costs you
None of this makes accrual the wrong choice for a business like Elena’s — it’s still the more honest picture of how the business is actually performing. The risk isn’t the method. It’s reading a profit number and assuming it means cash in the bank, without a separate eye on what’s actually collectible and when.
The expensive version of Elena’s week is the one where she doesn’t catch it until payroll is due — a scramble for a short-term loan, or a late fee on a supplier account, to cover a gap that a monthly cash-flow forecast would have flagged a month earlier.
A cash-flow forecast next to the accrual P&L is a couple of hours of bookkeeping work each month. Reconstructing where the money actually went, after a real crunch, takes a lot longer — do the arithmetic on your own hourly value and it adds up fast. A $299-a-month bookkeeping habit that tracks both numbers as you go is, almost every time, the cheaper problem.
Frequently asked questions
- What is the difference between cash accounting and accrual accounting?
- Cash accounting records income and expenses when money actually moves — cash in, cash out. Accrual accounting records income when you earn it (the job is done, the invoice goes out) and expenses when you incur them, whether or not cash has changed hands yet. The gap between the two only matters when there is a delay between doing the work and getting paid for it, which for most small businesses is often.
- What are the benefits of accrual accounting?
- It matches income to the period you actually earned it, which makes a monthly or quarterly profit-and-loss statement tell you the truth about that period instead of whichever invoices happened to clear. It is also the method GAAP requires, the one a bank or investor expects to see, and the one that makes year-over-year comparisons mean something because the timing noise is gone.
- Is accrual accounting required under GAAP?
- Yes. Generally Accepted Accounting Principles require accrual accounting because it applies the matching principle — expenses recognized in the same period as the revenue they helped generate. Cash basis books are legal and common for tax purposes and day-to-day management, but they are not GAAP-compliant, and a lender or investor who wants GAAP financials will ask for accrual statements specifically.
- Which businesses are legally required to use accrual accounting?
- Regular C corporations, and partnerships with a C corporation partner, generally must use accrual once average annual gross receipts over the prior three tax years cross a threshold the IRS indexes for inflation every year. Businesses that carry real inventory generally must use accrual for purchases and sales, with a small-business exception tied to that same threshold. Sole proprietors, most partnerships, and S corporations are free to choose either method regardless of size.
- What is the matching principle in accrual accounting?
- It is the rule that expenses should be recorded in the same period as the revenue they helped produce, rather than the period the bill happened to get paid. A landscaping company that buys stone in March for a job it completes and invoices in April recognizes that stone as a cost of April’s revenue, not March’s cash outlay — the two numbers move together instead of landing in different months.
- Can a profitable business run out of cash under accrual accounting?
- Yes, and it is one of the most common surprises owners run into. Accrual net income can look strong while the bank account is nearly empty, because unpaid invoices count as earned revenue before the cash arrives, and because certain real cash outflows — inventory purchases that sit on the balance sheet, loan principal payments — never show up as expenses on the profit-and-loss statement at all.
- How do you switch from cash to accrual accounting?
- You file Form 3115, Application for Change in Accounting Method, generally attached to the tax return for the year of the switch. It also calculates a one-time catch-up adjustment — a “section 481(a) adjustment” — so income already counted once under the old method is not counted again under the new one. Most small-business changes qualify as automatic changes that do not require advance IRS approval.
- What are the types of financial accounting a small business can choose from?
- The two the IRS recognizes are cash basis and accrual basis. A third, modified cash basis, is not a formal IRS method but a common bridge many small businesses run internally — cash basis day to day, with a side ledger tracking what is owed and owing, so the owner gets some of accrual’s visibility without the full overhaul.
More plain-English answers.
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Book a free 15-minute discovery call with Njock. Bring your books exactly as they are. We’ll tell you honestly whether accrual is serving you, and whether a simple cash-flow forecast next to it would have saved you a bad week.
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