Most founders can name their cash balance. Fewer can say what their net burn was last month without opening a spreadsheet, and fewer still know their runway to the week. That gap is not a discipline problem. It is a data problem: the numbers live in a ledger that closes weeks late, so by the time they are knowable they are no longer current.
The financial KPIs a funded startup should track live are cash balance, monthly burn (gross and net), runway in months, ARR or MRR, gross margin, and burn multiple. The hard part is not the list. It is keeping them current enough to decide on.
The six KPIs that actually matter
| KPI | How it is calculated | What it tells you |
|---|---|---|
| Cash and runway | Cash balance ÷ average monthly net burn | How long you have before you must raise or cut |
| Net burn | Cash out minus cash in, per month | How fast you are consuming cash, the survival number |
| ARR / MRR | Annualised or monthly recurring revenue, with growth rate | Revenue trajectory |
| Gross margin | (Revenue minus cost of revenue) ÷ revenue | Unit health, and whether growth is worth funding |
| Burn multiple | Net burn ÷ net new ARR | Efficiency, and what VCs judge at Series A |
| Net revenue retention | Revenue from existing customers, period over period | Whether growth compounds or leaks |
Two of these deserve more attention than they usually get. Gross margin is where an expensive delivery model hides, and it decides whether adding revenue actually improves the business. Net revenue retention is where churn shows up before it reaches your growth rate, which is why a company can look healthy on new bookings and be quietly shrinking underneath.
Why live beats a monthly report
A KPI that is three weeks old is not a KPI, it is history. Founders who track burn and runway weekly catch problems while they are still fixable, because the useful window for acting on a burn spike is measured in weeks, not quarters.
The two that reward the most attention are burn rate, which with your cash balance gives runway, and burn multiple, which ties spend to growth and is the number a VC reaches for at your next round. Burn rate tells you how fast you are moving. Burn multiple tells you whether the movement is worth what it costs.
How often to look at each one
Not every metric rewards the same cadence, and checking everything weekly is how teams stop checking anything.
| Cadence | What to review |
|---|---|
| Weekly | Cash balance, net burn, runway. The survival numbers |
| Monthly | Full package: ARR growth, gross margin, retention, burn multiple |
| Quarterly | Trend review against plan, and the fundraising timeline that follows from runway |
Where KPI tracking usually goes wrong
The failure is rarely the arithmetic. It is that the inputs are stale, inconsistent, or disconnected from the accounting.
- The metrics live in a spreadsheet that someone updates manually, so they are only as current as the last time that person had a free afternoon.
- Burn is calculated differently from month to month, usually because one-off items get stripped out in some months and not others, which makes the trend meaningless.
- ARR mixes recurring and one-time revenue, which inflates the number and breaks the tie-out to the P&L.
- Nobody has defined the metrics in writing, so two people in the same company quote different runway figures in the same week.
The fix for all four is the same: derive the metrics from books that are already closed and reconciled, and write the definitions down once. A KPI is only as trustworthy as the ledger underneath it.
Two numbers worth calculating by hand once
Runway and burn multiple are the two founders most often quote from memory and most often get wrong, usually because the inputs are inconsistent rather than because the formula is hard.
Runway is cash divided by average monthly net burn, and the argument is always about which burn. A single month distorted by an annual insurance payment or a tax bill produces a runway figure that is months out. Use a trailing three-month average, state that you are doing so, and keep the method fixed so the trend means something.
Burn multiple is net burn divided by net new ARR over the same period. The word net is doing the work in both halves: net new ARR is new plus expansion minus churn and contraction, so a retention problem hits the denominator while your spend stays put. That is why the number moves sharply when something breaks, and why it is a better early warning than growth rate alone.
What to put in front of your board
A board does not want six numbers with no context. It wants the same six numbers every month, with the trend and a line on what changed.
| Show | Not |
|---|---|
| Runway in months, with the burn method stated | Cash balance alone |
| Net burn trend over six months | A single month in isolation |
| ARR with the growth rate and what drove it | A revenue number with no movement |
| Burn multiple against the prior quarter | Efficiency described in words |
| Gross margin by month | A blended annual figure |
A worked month, end to end
The formulas are simple enough that the arithmetic is rarely the problem. Seeing all six computed from one set of figures is what makes the interactions visible. Take a hypothetical company closing October.
- Cash at 31 October: $2,400,000
- Cash in during October: $310,000. Cash out: $700,000
- Trailing three-month net burn: $420,000, $370,000 and $390,000
- ARR at 1 October: $3,600,000. New: $180,000. Expansion: $60,000. Contraction: $25,000. Churn: $95,000
- Revenue in October: $305,000. Cost of revenue: $79,000
Net burn for October is $700,000 minus $310,000, so $390,000. Runway on that single month is $2,400,000 divided by $390,000, about 6.2 months. On the trailing three-month average of $393,333 it is about 6.1 months, and the closeness of those two figures is itself informative: it says October was a typical month rather than a distorted one. When they diverge sharply, the average is the honest number and the single month is the one to explain.
Net new ARR is $180,000 plus $60,000 minus $25,000 minus $95,000, so $120,000. Ending ARR is $3,720,000. Burn multiple for the month is $390,000 divided by $120,000, which is 3.25x. Gross margin is $305,000 minus $79,000, over $305,000, so about 74%.
Now read them together, which is the part a single-metric dashboard cannot do. Growth looks acceptable: ARR is up. Gross margin is respectable. But the burn multiple of 3.25x is in the band investors treat as poor, and the reason is visible in the inputs rather than the output: $120,000 of churn and contraction against $240,000 of new and expansion means nearly half the gross additions were consumed by the existing base. Fix retention and the same spend produces a materially better ratio, without selling a dollar more.
Run this calculation once by hand for your own last closed month. Doing it manually surfaces the definitional questions immediately, because you have to decide what counts as cash in, what sits in cost of revenue, and whether an upsell is new or expansion. Those decisions are the metric definitions, and making them deliberately once is what stops two people quoting different runway figures next quarter.
Which of the six matter at your stage
All six are worth tracking eventually. Which ones should drive decisions changes with what you are trying to prove.
| Stage | The numbers that decide things | Why |
|---|---|---|
| Pre-revenue | Cash, net burn, runway | There is no revenue to be efficient about. The only question is whether you reach the next milestone on this cash |
| Early revenue | The above, plus gross margin | Establishes whether the delivery model works before you scale spend against it |
| Post-Series A | All six, with burn multiple and NRR leading | Efficiency and retention are what the next round is underwritten on |
The common mistake at the first stage is tracking ARR growth rate as the headline while runway quietly shortens. The common mistake at the third is the reverse: watching cash carefully while the burn multiple drifts upward for two quarters without anyone naming it.
How Zinance keeps them live
Your books close daily, feeding a dashboard built around your metrics, so cash, burn, runway, and ARR are current whenever you open it, with a human watching for the spike you would otherwise miss. The numbers you brief your board on are the same numbers you ran the business on all month, which removes the reconciliation argument entirely. For how those numbers become an investor package, see investor-ready monthly financials.