Startup Finance: Knowing How Long You Have
Accounting records the past. Finance is about the future: how much cash you have, how fast you're spending it, and what it takes to raise more before you run out. Here's how the pieces connect.
THE SHORT VERSION
Most startups don't fail because the product was wrong. They fail because they ran out of money before they figured the product out. Startup finance is the discipline of not letting that happen: watching your cash, understanding your burn, and timing your raise so you're negotiating from strength instead of desperation.
This is different from accounting and different from taxes. Taxes are compliance. Accounting is the record. Finance is the steering, the part where you use the numbers to make decisions about the next six to eighteen months. This section covers the four pieces that matter most early.
01 The Pulse
Cash Flow
Where your money actually comes from and goes, and why a profitable company can still run dry.
Read the guide →
02 The Clock
Runway & Burn Rate
How fast you're spending and how many months that leaves you. The two numbers every founder should know cold.
Read the guide →
03 The Raise
Fundraising
What investors look at, how the money changes your obligations, and the financial prep that makes diligence smooth.
Read the guide →
04 The Map
Financial Planning
Turning your numbers into a forward model you can steer by, and revisit when reality disagrees with the plan.
Read the guide →
The one relationship that matters most
If you internalize one thing from this section, make it this: cash and profit are not the same thing. A startup can show a profit on paper and still run out of money, and a startup can burn cash for years while building enormous value. The income statement tells you about profit. Cash flow, runway, and burn tell you whether you survive long enough to matter.
The Vocabulary, In Plain Terms
Burn rate
How much cash your startup spends per month, net of what comes in.
Runway
How many months of cash you have left at your current burn.
Cash Flow
The actual movement of money in and out, regardless of when it's "earned."
Default alive
Reaching profitability on the cash you already have, without needing to raise again.
Why founders get this wrong
Finance is where technical founders are most likely to be flying blind, because it's the least like building product. Three patterns show up again and again.
Not knowing the runway number. A surprising number of founders can't say, off the top of their head, how many months of cash they have. That number should be as familiar as your active user count.
Raising too late. Fundraising takes longer than founders expect. Starting a raise with three months of runway means negotiating under a deadline everyone can see, which is a weak position.
Confusing revenue with cash. Booked revenue you haven't collected doesn't pay salaries. The gap between what you've earned and what's in the bank is where startups get surprised.
Want help building a model you can trust?
If you'd rather have a professional set up your financial model and reporting, we can connect you with a provider experienced with California startups.
How this connects to the rest of your finances
Finance doesn't stand alone. It's built on the same foundation as everything else on this site.
It runs on your bookkeeping. You can't track cash flow or burn without clean books. Garbage in, garbage out.
It reads from your financial statements. Your cash flow number comes straight from your financial reporting.
It intersects with taxes at the worst moments. A surprise tax bill can shorten your runway. Knowing your California tax obligations is part of planning your cash.
Where to start
If you don't know your runway, start with Runway & Burn Rate today, it's the single most important number you're missing. If you're heading toward a raise, read Fundraising early, because the prep takes longer than you think. And Cash Flow is the concept underneath all of it.