Your Bank Balance Is Lying to You

Curtis DavisFebruary 28, 2026Updated March 12, 20266 min read

TL;DR

Your bank balance includes deferred revenue, tax reserves, and hidden commitments — money that isn't yours to spend. SaaS founders typically have 20–40% less available cash than their bank balance shows. Safe-to-Spend = Bank Balance − Deferred Revenue − Tax Reserve − Commitments − 30-Day Costs.

You check your bank balance. It says $84,000. You feel a brief wave of relief. We're fine. You go back to work.

But you're not fine. Not really. That $84,000 includes money that doesn't belong to you yet, money the IRS wants, and money you've already promised to someone else. Your real number — the cash you can actually spend — is $31,000.

This isn't a rare edge case. 82% of startup failures stem from cash flow mismanagement (CB Insights), and 76% of business owners report cash flow problems undermined their performance (QuickBooks Capital). The gap between your bank balance and your real number is where these failures begin.

Here's where the gap comes from.

Deferred revenue: the biggest lie in your bank account

If you sell annual subscriptions, you collect 12 months of revenue upfront. That cash lands in your bank account immediately. It feels great.

But you haven't earned it yet. If a customer paid $12,000 for a year and three months have passed, you've earned $3,000. The other $9,000 is deferred revenue — it sits in your bank account, but it's not yours to spend. If that customer cancels, you might owe it back.

The more annual subscriptions you sell, the bigger this gap gets. A SaaS company with $8K MRR and 30% annual subscriptions might have $14,000+ in deferred revenue hiding in their bank balance.

The tax reserve you forgot about

Revenue means taxes. If you're not setting aside money for your tax bill, you're spending money the IRS already owns.

A common rule of thumb: set aside 25% of your net revenue as a tax reserve. On $8K MRR, that's $2,000/month you shouldn't touch. Over time, this adds up to a significant chunk of your bank balance that's already spoken for.

Hidden commitments: the verbal yeses

You told a contractor you'd bring them on next month. You said yes to an annual tool renewal. You're planning to upgrade your infrastructure in Q2.

None of these are in your bank balance. None of them are in your spreadsheet. They live in your head, in Slack messages, in emails. But they're real obligations — and when they come due, they hit your cash all at once.

Your next 30 days of costs

Payroll. Hosting. Tools. Insurance. Your own salary. These recurring costs are coming whether you think about them or not. Subtracting your next 30 days of operating expenses from your bank balance gives you a more honest view of what's left.

The formula

Bank balance$84,000

− Deferred revenue($21,600)

− Tax reserve($12,000)

− Hidden commitments($8,000)

− Recurring costs (30d)($11,400)

Safe-to-Spend$31,000

That's the gap. $53,000 that your bank balance shows but you can't actually use.

See your own gap with the free calculator.

Try the Safe-to-Spend Calculator

What to do about it

Step one is knowing the gap exists. Most founders never get past checking their bank balance and calling it a day.

Step two is doing the math — regularly. Not once, not when you feel anxious, but every week. Because the gap changes as you collect new annual subscriptions, make new commitments, and your costs shift.

You can do this in a spreadsheet. Or you can use Nett to have it computed automatically from your Stripe data every day. Either way — stop trusting your bank balance. It's lying to you.

82% of startup failures stem from cash flow mismanagement.

Know your real number.

Not what the bank says. What you can actually spend.

See your real number

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