MBA Mondays - Business 101 for startups by Fred Wilson

Accounting: Cash Flow

This week on MBA Mondays, we are going to talk about cash flow. A few weeks ago, in my post on Accounting, I said there were three major accounting statements. We've talked about the Income Statement and the Balance Sheets. The third is the Cash Flow Statement.

I've never been that interested in the Cash Flow Statement per se. The standard form of a cash flow statement is a bit hard to comprehend in my opinion and I don't think it does a very good job of describing the various aspects of cash flow in a business.

That said, let's start with the concept of cash flow and we'll come back to the accounting treatment.

Cash flow is the amount of cash your business either produces or consumes in a given period, typically a month, quarter, or year. You might think that is the same as the profit of the business, but that is not correct for a bunch of reasons.

The profit of a business is the difference between revenues and expenses. If revenues are greater than expenses, your business is producing a profit. If expenses are greater than revenues, your business is producing a loss.

But there are many examples of profitable businesses that consume cash. And there are also examples of unprofitable businesses that produce cash, at least for a period of time.

Here's why.

As I explained in the 'Income Statement' post, revenues are recognized as they are earned, not necessarily when they are collected. And expenses are recognized as they are incurred, not necessarily when they are paid for. Also, some things you might think of as expenses of a business, like buying servers, are actually posted to the Balance Sheet as property of the business and then depreciated (i.e. expensed) over time.

So if you have a business with significant hardware requirements, like a hosting business for example, you might be generating a profit on paper but the cash outlays you are making to buy servers may mean your business is cash flow negative.

Another example in the opposite direction would be a software as a service business where your company gets paid a year in advance for your software subscription revenues. You collect the revenue upfront but recognize it over the course of the year. So in the month you collect the revenue from a big customer, you might be cash flow positive, but your Income Statement would show the business operating at a loss.

Cash flow is really easy to calculate. It's the difference between your cash balance at the start of whatever period you are measuring and the end of that period. Let's say you start the year with $1mm in cash and end the year with $2mm in cash. Your cash flow for the year is positive by $1mm. If you start the year with $1mm in cash and end the year with no cash, your cash flow for the year is negative by $1mm.

But as you might imagine the accounting version of the cash flow statement is not that simple. Instead of getting into the standard form, which as I said I don't really like, let's talk about a simpler form that gets you to mostly the same place.

Let's say you want to do a cash flow statement for the past year. You start with your Net Income number from your Income Statement for the year. Let's say that number is $1mm of positive net income.

Then you look at your Balance Sheet from the prior year and the current year. Look at the Current Assets (less cash) at the start of the year and the Current Assets (less cash) at the end of the year. If they have gone up, let's say by $500,000, then you subtract that number from your Net Income. The reason you subtract the number is your business used some of your cash to increase its current assets. One typical reason for that is your Accounts Receivable went up because your customers are taking longer to pay you.

Then look at your Non-Current Assets at the start of the year and the end of the year. If they have gone up, let's say by $500k, then you also subtract that number from your Net Income. The reason is your business used some of your cash to increase its Non-Current Assets, most likely Property, Plant, and Equipment (like servers).