The bank-account ritual. Cash discipline without a CFO.

Watch gross burn — it's the conservative number

There are two ways to measure burn: gross (everything you spend) and net (spend minus what comes in). I watched gross, because it's the more conservative read — it doesn't assume the revenue shows up, and it plans for the version where it wobbles. For a bootstrapped company that can't call an investor when a quarter goes sideways, conservative is the right default. The number that actually drains the bank account is net, but gross is the one I managed to, because it kept me honest about what the company truly cost to run.

Cash on hand divided by that monthly burn is your survival months — your runway. Know it cold and watch it move. I used to think of six months or less as a danger zone, and a year or more as healthy. We were never in danger, but I always knew the number, and knowing it is what kept us out of danger.

When cash got tight, I collected before I cut

The ritual came with a reflex. When cash got tight, the instinct most founders have is to start slashing expenses. But the fastest, cheapest lever is usually the cash already owed to you. Before cutting anything, I'd look at the ARR and check whether any customers were late or past due, and go chase that money in.

Overdue invoices are survival months sitting in someone else's bank account. Collecting a stack of them extends your runway immediately, costs you nothing but a few phone calls, and does no damage to the business. Cutting is slower, more painful, and easier to get wrong. So collect first — it buys you the time to cut thoughtfully instead of in a panic, if you even still need to.

Even profitable companies need a rainy-day fund

People assume cash discipline is only for companies losing money. It isn't. We were profitable — net burn was negative — and I still ran the ritual every month, because every company eventually meets the thing it didn't see coming. A GDPR implementation lands on your desk. An unforeseen tax bill shows up. Something breaks that has to be fixed now. If you don't know your cash and your cushion cold, an ordinary surprise becomes an emergency.

A rainy-day fund is what turns those from crises into line items. The point of watching your burn when you're profitable isn't survival — it's knowing whether you could absorb a bad month without flinching. You almost always can, if you've been paying attention. You almost never can, if you haven't.

Spend like the next raise isn't guaranteed

The deepest lesson is a mindset, not a metric. Treat burn as a deliberate choice, where every dollar out has a defensible reason and a line back to revenue — not as a number that drifts upward because nobody's looking. The trap that kills companies isn't a high burn; a well-funded company can burn a lot and be fine. It's a burn that widens every month, the P&L going negative by larger and larger amounts, because costs crept away from the plan and no one caught it.

So watch the trajectory, not just the level. Compare actuals to your financial plan, find the line items that drifted, and tighten there — deliberately, against the variance, not across the board in a fright. Spend like the next raise isn't guaranteed, because for a bootstrapped company, it isn't. That's not pessimism. It's the discipline that let a small company outlast competitors who had more money and less attention to where it went.