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Watch your best month disappear.

One annual deal, two sets of books. On cash basis it looks like the month you signed was your best ever. It wasn't. Flip the switch and watch the truth show up.

By Pelle Brændgaard

Here's the whole trap in one picture. A founder signs a $12,000 annual contract, paid upfront, and runs about $3,000 a month in costs. Cash basis books the entire year of revenue on the day the money lands, so the signing month looks enormous and every other month looks like you're bleeding out. Accrual basis spreads that $12,000 across the twelve months you actually earn it, $1,000 at a time, so every month reads true.

Start on Cash basis below (that's how many founder spreadsheets begin), then flip to Accrual. Drag the deal to a different month, change its size, change your costs. The point lands fastest when you break it yourself.

Monthly profit this calendar year

Annual deal, paid upfront Signed in Costs, every month

Why this matters more than it looks

You make decisions off these numbers, and so does everyone who reads them. On cash basis your income statement swings for no real reason: your profit and your margin lurch from great to terrible month to month while the business underneath hasn't changed at all, so you can't tell a genuinely good month from an accounting mirage. You look at the big month and think you can afford a hire; you look at the next one and panic. Cash still matters for runway, but cash-basis profit is the wrong story.

Then the real bill lands. Around your Series A an investor or auditor asks for accrual statements, because that's the basis serious companies report on, and you end up paying an accountant to restate a year or more of books by hand at exactly the moment you can least afford the distraction. The shortcut you took in year one bills you in year two, with interest.

The fix isn't complicated, it's just tedious, which is exactly the kind of thing software should do for you. Accrual by hand needs a bookkeeper; accrual kept automatically from your first transaction, recognizing an annual deal a month at a time, is what AI-agent bookkeeping is for. You start where a priced round or an audit will eventually require you to be, and you never pay for the conversion.