Why revenue and profit are the wrong numbers to check first
Revenue tells you what you sold. Profit tells you what was left after costs. Neither tells you whether you can make payroll next month - a profitable business with customers who pay slowly can still run out of cash, and a business that's technically unprofitable this quarter can still be perfectly healthy if it has runway and a clear path back. Revenue and profit are lagging indicators: real by the time you see them, but too late to act on. The metrics below are leading indicators - they move first.
- #1
- cited reason small businesses fail is cash flow, not profitability
- 30–60
- days is a typical gap between delivering work and getting paid
- Weekly
- is how often these numbers should actually be checked
The five numbers worth checking weekly
| Metric | What it tells you | A number worth worrying about |
|---|---|---|
| Cash runway | How many months you can operate at current burn | Under 3 months and shrinking |
| Days Sales Outstanding (DSO) | How long money sits with customers after you invoice | Rising for 2+ months in a row |
| Gross margin | What you keep after the direct cost of what you sold | Falling while revenue grows |
| Overdue receivables % | Share of what you’re owed that’s past due | Above 15–20% of total AR |
| Burn rate | Net cash spent per month, above what comes in | Increasing without a matching revenue plan |
A five-minute weekly finance check
Cash runway: the only number that tells you how much time you have
Cash runway is your current cash balance divided by your average monthly burn (cash out minus cash in). It's the single most honest number in the business because it's expressed in time, not currency - 'four months of runway' means something concrete regardless of how big or small the business is. Recalculate it whenever burn changes meaningfully, not just once a quarter.
Worked example
A business with $45,000 in the bank, spending $9,000/month more than it brings in, has 5 months of runway. That is not a crisis number by itself - but if last month’s burn was $6,000, the trend matters more than the snapshot.
Days Sales Outstanding: how long your own money sits with someone else
DSO measures the average number of days between issuing an invoice and getting paid for it. A rising DSO is one of the earliest signs of a collections problem - often visible weeks before it shows up as a cash shortage. It's calculated as (Accounts Receivable ÷ Total Credit Sales) × Number of Days in the period.
Watch the trend, not the snapshot
A DSO of 45 days isn’t automatically bad - some industries and payment terms run that long by default. A DSO that climbed from 30 to 45 over three months is the actual signal, regardless of what the absolute number is.
Gross margin vs. net margin - and why both matter
Two different questions, two different margins
Gross margin
- (Revenue − direct cost of goods/services) ÷ Revenue
- Answers: is the core thing I sell fundamentally profitable?
- Falling gross margin usually means pricing or input-cost problems
Net margin
- (Revenue − all costs, including overhead) ÷ Revenue
- Answers: is the whole business profitable, overhead included?
- Falling net margin with flat gross margin usually means overhead grew faster than revenue
Reading receivables risk, not just receivables totals
A single "Accounts Receivable" total hides more than it shows - $50,000 owed by ten reliable customers is a very different situation from $50,000 owed by one customer who’s gone quiet. Some accounting tools score each open invoice by payment risk (payment history, days overdue, communication gaps) so you can see which balances need a phone call this week versus which are simply not due yet. Whether or not your tool scores it for you, an aging report broken down by customer is the manual equivalent - and worth reading in full, not just at the total line.
A 15-minute weekly finance review
- 1
Check the bank balance
And compare it to what it was a week ago - the direction matters as much as the number.
- 2
Pull the AR aging report
Sort by days overdue. Anything crossing a new aging bucket (30→60, 60→90) gets a follow-up this week.
- 3
Recalculate runway
If burn changed meaningfully from last week, update the months-remaining number.
- 4
Scan upcoming bills
Anything due before your next expected receipt gets flagged now, not on the due date.
- 5
Note one action
One concrete thing to do this week because of what you just saw - a call, a follow-up, a spending pause.
How is cash runway different from a cash flow forecast?
Runway is a single snapshot number (cash ÷ burn rate) - quick to check weekly. A full cash flow forecast projects specific inflows and outflows week by week and is more accurate, but takes longer to build and maintain. Use runway for a quick pulse check, and a forecast when a decision actually depends on the details.
What counts as a "good" gross margin?
It varies enormously by industry - software businesses often run 70–90% gross margin, while retail and distribution businesses commonly run 20–40%. Compare your own margin against its own trend and against others in your specific industry, not against a universal benchmark.
Should I track these numbers even if I’m profitable?
Yes - profitability and cash health are related but not the same thing. A profitable business can still run out of cash from slow collections or fast growth (which consumes cash before it returns as profit). These metrics catch that gap.
Profit is an opinion. Cash is a fact.
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