Metric definitions
Every metric in this system ships with its formula, its period, its inputs, and its source. A KPI without a definition is a number people argue about in meetings.
The rule:
MetricCardrequires adefinition. There is no variant without one. The definition is reachable from the card — an info affordance openingMetricDefinition, which shows the formula with the actual input values substituted.
Why this is a design problem
"ARR" means at least four different things across four companies. "Burn" might be gross or net. "DSO" has two accepted formulas that give different answers. Products that render these without definitions create the appearance of precision and the reality of confusion.
MetricDefinition renders:
Net Revenue Retention 104.6%
────────────────────────────────────────────────────────────────
(Starting MRR + Expansion − Contraction − Churn) ÷ Starting MRR
( 412,000 + 61,400 − 18,200 − 24,100 ) ÷ 412,000
Cohort: customers active on 1 Sep 2026
Period: 1–30 Sep 2026
Source: subscription ledger · excludes one-time fees
Note: new customers excluded by definition
Formula, substituted values, cohort, period, source, and the caveat. That block is the component.
Liquidity & working capital
| Metric | Formula | Note |
|---|---|---|
| Working capital | Current assets − Current liabilities |
Absolute, not a ratio |
| Current ratio | Current assets ÷ Current liabilities |
> 1 means current assets cover current liabilities — liquidity, not solvency or health |
| Quick ratio | (Cash and equivalents + Short-term investments + Accounts receivable) ÷ Current liabilities |
The acid test. The shortcut (Current assets − Inventory − Prepaids) ÷ Current liabilities keeps other current assets in and reads higher — state which |
| Cash ratio | Cash and equivalents ÷ Current liabilities |
Most conservative |
| CCC | DSO + DIO − DPO |
Days cash is tied up. Negative is excellent. |
| DSO | (Ending AR ÷ Credit sales for the period) × Days in the period |
Two formulas exist — see order to cash |
| DIO | (Inventory ÷ COGS for the period) × Days in the period |
Ending or average inventory — state which |
| DPO | (Ending AP ÷ COGS for the period) × Days in the period |
Some use purchases rather than COGS, which suits a business whose AP is mostly opex. Render with on-time payment rate adjacent — see procure to pay |
| Receivables turnover | Credit sales ÷ Average AR |
Times per period; Days in the period ÷ turnover is DSO on average AR |
| Inventory turnover | COGS ÷ Average inventory |
Times per period; Days ÷ turnover is DIO |
| CEI / Collection effectiveness index | (Opening AR + Credit sales − Closing total AR) ÷ (Opening AR + Credit sales − Closing current AR) |
Percent of collectible AR actually collected; 100% is perfect. See order to cash |
Profitability
| Metric | Formula | Note |
|---|---|---|
| Gross margin | (Revenue − COGS) ÷ Revenue |
Requires a COGS classification; omit the metric if there isn't one |
| Contribution margin | (Revenue − Variable costs) ÷ Revenue |
Strictly the ratio form — the amount is Revenue − Variable costs. Variable-cost classification is a judgment; state it |
| Operating margin | Operating income ÷ Revenue |
|
| EBIT | Net income + Interest expense + Income tax expense |
Close to operating income, but also carries other non-operating income and expense. Non-GAAP |
| Net margin | Net income ÷ Revenue |
|
| EBITDA | Net income + interest + income taxes + D&A (≈ operating income + D&A with no other non-operating items) |
Non-GAAP — see below |
| EBITDA margin | EBITDA ÷ Revenue |
|
| Rule of 40 | Revenue growth % + EBITDA margin % |
SaaS heuristic, not an accounting measure. Many use free-cash-flow margin instead of EBITDA margin, and year-over-year ARR growth instead of revenue growth — label which |
EBITDA
Not a GAAP or IFRS line. Wherever it appears it must:
- Appear below net income, in a separated non-GAAP block — never inside the P&L.
- Show its reconciliation to net income, line by line.
- State every adjustment. "Adjusted EBITDA" with unnamed adjustments is not a number, and the component requires the adjustment list.
The same rules apply to free cash flow, adjusted net income, and every other non-GAAP measure. NonGaapReconciliation exists specifically so this can't be skipped.
Cash & runway
| Metric | Formula | Note |
|---|---|---|
| Gross burn | Total operating cash outflows in the month | Ignores revenue |
| Net burn | Operating and investing cash out − cash in, excluding financing inflows |
The one that matters for runway. Equity raised or debt drawn is not negative burn |
| Runway | Cash ÷ net monthly burn |
State which burn. Gross-burn runway is a different, shorter number. |
| Months of cash | Same as runway | Say one thing, not both |
| Free cash flow | Operating cash flow − Capital expenditures |
Non-GAAP; state whether capitalized software and finance-lease principal are deducted |
| Burn multiple | Net burn ÷ Net new ARR, over the same period |
Efficiency; lower is better — under 1× is excellent, over 2× is a warning (David Sacks's bands). Undefined when net new ARR is zero or negative |
Worked example. Cash and equivalents of $4,200,000; net burn of $210,000 in July, $230,000 in August and $250,000 in September, so trailing-3-month net burn is $230,000. Runway is 4,200,000 ÷ 230,000 = 18.26, rendered "18.3 months at trailing-3-month net burn". On September alone it is 4,200,000 ÷ 250,000 = 16.8 months — a 1.5-month difference from the choice of window alone, which is exactly why the window is stated. If the quarter's net burn of $690,000 bought $460,000 of net new ARR, the burn multiple is 690,000 ÷ 460,000 = 1.5×.
Runway rules:
- The burn basis is displayed on the card, not buried. "18.3 months at trailing-3-month net burn."
- The averaging window is stated — last month, trailing 3, trailing 6. A single anomalous month can double or halve the answer.
- The projection is dashed on any chart. It's a forecast.
- Committed but unpaid obligations (signed contracts, POs) should be disclosed alongside, because runway that ignores commitments is optimistic.
Recurring revenue
Definitions vary the most here, so the discipline matters the most.
| Metric | Formula | Note |
|---|---|---|
| MRR | Sum of normalized monthly recurring subscription value | Excludes one-time fees, usage overage, services, and taxes |
| ARR | MRR × 12 |
Only meaningful for subscriptions. Never for transactional revenue. |
| New MRR | From customers new this period | |
| Expansion MRR | Upgrades and seat additions from existing customers | |
| Contraction MRR | Downgrades, not cancellations | |
| Churned MRR | Full cancellations | |
| Net new MRR | New + Expansion − Contraction − Churned |
The movement that explains the change |
| Gross revenue retention | (Starting − Contraction − Churn) ÷ Starting |
Caps at 100% |
| Net revenue retention | (Starting + Expansion − Contraction − Churn) ÷ Starting |
Can exceed 100% |
| Logo churn | Customers lost ÷ starting customers |
Different from revenue churn |
Rules:
- MRR is not revenue. It's an operating metric derived from subscriptions and it will not tie to the P&L. Presenting them adjacent without stating that invites the question every board asks.
- The MRR bridge is the primary view — the waterfall from opening MRR through each movement to closing. A single MRR number with a percentage change explains nothing.
- NRR and GRR both, or neither. NRR alone hides churn behind expansion.
- Every cohort definition is stated. "Customers active on the first day of the period" is a choice, and a different choice gives a different answer.
Unit economics
Flag these clearly: these are not accounting measures. They rest on definitional choices with no standard, and the component makes those choices visible.
| Metric | Formula | The contested part |
|---|---|---|
| CAC | Sales & marketing spend ÷ new customers |
Which costs count; which period they're attributed to |
| ARPA / Average revenue per account | MRR ÷ Active customers, per month |
Per account, not per user (ARPU) — say which; mean, not median |
| CAC payback | CAC ÷ (Monthly ARPA × Gross margin), in months |
Whether margin is applied; whether ARPA is new-customer or blended |
| LTV | (ARPA × Gross margin) ÷ Revenue churn rate, both in the same period unit |
Extremely sensitive to the churn input; unstable at low churn |
| LTV:CAC | Meaningless without both definitions stated | |
| Magic number | Net new ARR in the quarter ÷ prior-quarter S&M (equivalently (Δ quarterly revenue × 4) ÷ prior-quarter S&M) |
Rule: LTV computed on a monthly churn rate below ~1% produces an absurd number. The component caps the horizon (commonly 36 months) and displays the cap, rather than rendering a confidently wrong figure.
Leverage & coverage
| Metric | Formula | Note |
|---|---|---|
| Debt-to-equity | Total debt ÷ Total equity |
Debt is interest-bearing borrowings (and, commonly, lease liabilities). Some use total liabilities — a different, larger ratio; state which |
| Net debt | Total debt − Cash |
Can be negative |
| Interest coverage | EBIT ÷ Interest expense |
Common covenant |
| DSCR | Cash available for debt service ÷ Debt service (interest + scheduled principal) |
Common covenant. Real estate uses net operating income; corporate loans usually EBITDA less capex and cash taxes — the credit agreement defines it |
| Leverage ratio | Net debt ÷ EBITDA (or total debt ÷ EBITDA) |
Definition is usually specified in the loan agreement, not by convention |
Covenant metrics use the definition in the credit agreement, not the generic one. Lenders define "EBITDA" contractually, with specific add-backs. CovenantMonitor stores the contractual definition per covenant and computes against it, showing the headroom and the test date — and the number it displays may legitimately differ from the dashboard's EBITDA. That's not a bug, and the UI says so.
Display rules
- Every metric carries its definition. No exceptions.
- Every metric states its period and comparison basis.
+5.3% vs. Aug, never a bare+5.3%. - Percentage points vs. percent are discriminated at the type level. See numerics.
polarityis required. Rising DPO, rising burn, and rising churn are not good news.- Division by zero renders
n/a, never∞,NaN, or100%. - Non-GAAP measures are labeled and reconciled.
- Metrics derived from unreconciled data are marked provisional. A KPI computed mid-close, before the bank is reconciled, is an estimate — and labeling it as such is what keeps people from quoting it externally.
- Trailing averages state their window.
- Ratios show their inputs on hover.
1.8×is not inspectable;$4.2M ÷ $2.3Mis. - Metric definitions are versioned. When a definition changes, historical values computed under the old one are marked, because an unannounced definition change looks like a business change.