Accounting

Accrual vs. Cash Accounting

Definition

Cash accounting records revenue and expenses when money actually moves. Accrual accounting records them when they're earned or incurred, regardless of when cash changes hands.

Say a company invoices a customer in December but doesn't get paid until January. Accrual accounting recognizes that revenue in December; cash accounting waits until January. The same logic applies to expenses: a bill received in one month but paid the next.

Cash accounting is simpler and fine for a lot of very small businesses, but it can paint a misleading picture of a growing company's actual performance, since revenue and expenses land in whatever month the cash happens to move rather than the month the work happened. GAAP requires accrual accounting, and it's what investors and acquirers expect to see, which is part of why most venture-backed startups move to accrual books well before they're required to.

The difference in one example

A customer signs a $12,000 annual contract in January and pays it all up front. On cash books, January shows $12,000 of revenue and February through December show nothing. On accrual books, each month shows $1,000 of revenue, and the $11,000 not yet earned sits on the balance sheet as deferred revenue at the end of January.

Both are telling the truth about something. Cash books say what happened in the bank. Accrual books say what the business actually earned and spent each month, which is what you need to see margins, growth, and burn clearly.

Which one you're allowed to use

For your financial statements: GAAP requires accrual. Investors, lenders, and acquirers expect it, and an audit or quality-of-earnings review will restate cash books to accrual anyway.
For your tax return: many startups can still file on the cash method. A C corp (or a partnership with a C corp partner) can use it as long as its average annual gross receipts over the prior three years are $32 million or less for 2026. Tax shelters can't use it at any size.
Both at once: it's common, and fine, to keep accrual books for management and investors and file taxes on the cash method. Your accountant tracks the difference.

When to switch to accrual

You bill annually or quarterly up front, so cash spikes don't match the work
You're preparing to raise, and investors will ask for monthly accrual financials
You have meaningful payables or receivables, so the bank balance hides what you owe or are owed
You need real monthly margins or burn, not a number that swings with payment timing

Switching mid-year is messier than switching at a clean year-end, and catching up a year of cash books to accrual right before diligence is one of the more expensive bookkeeping projects there is.

Worked example: one annual contract, two sets of books

Cash basis: January revenue $12,000; February to December $0. The year looks like one great month and eleven bad ones
Accrual basis: $1,000 of revenue every month; $11,000 of deferred revenue on the balance sheet at the end of January, shrinking by $1,000 a month
What an investor sees: Only the accrual version shows steady recurring revenue and a margin you can compare month to month

Same contract, same cash; only the timing of when revenue is recorded changes.

Questions founders ask

Is cash or accrual accounting better for a startup?

Accrual, for the books you show investors and use to run the company: GAAP requires it and it shows real monthly performance. Many startups still file taxes on the cash method, which is allowed below the gross receipts threshold.

Can a C corp use cash basis accounting for taxes?

Yes, if its average annual gross receipts for the prior three years are at or under the threshold, $32 million for tax years beginning in 2026, and it isn't a tax shelter.

Can I keep accrual books but file taxes on a cash basis?

Yes. It's common for startups to keep accrual books for management and investors while filing on the cash method. Your accountant reconciles the two at tax time.

Do investors require accrual accounting?

Almost always for a priced round. Diligence teams expect GAAP-style accrual financials and will either ask you to convert cash books or do it themselves, which slows the round.

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