Average Annual Gross Margin Per Unit
The average annual gross profit a business retains from a single customer or user after direct cost of goods sold — annual revenue per unit multiplied by gross margin percentage.
◆ Currency
Formula
Built from
What it measures
The annual gross profit attributable to one unit, found by multiplying revenue per unit (ARPU or per-logo ARR) by the gross margin percentage. It isolates the productive value a single customer or seat returns after the direct cost of serving them — hosting, support labor, payment processing — but before any operating expense. Where ARPU answers "how much revenue does a unit produce" and gross margin answers "how much of revenue survives delivery cost," this metric fuses the two into the dollars of margin one unit actually contributes each year.
Why it matters
Unit economics decide whether growth pays for itself, and gross margin per unit is the cleanest read on the margin one customer throws off before operating spend. A business with $2K ARPU and 70% gross margin earns $1.4K of gross profit per customer per year — the pool that has to cover sales, support, and overhead and still fund growth. Operators use it to size go-to-market budgets and stress-test scaling plans; investors use it because it is the numerator beneath payback and lifetime value. When margins compress while ARPU holds flat, this number falls and CAC payback quietly lengthens long before churn shows it — making gross margin per unit an early warning that headline revenue growth can hide.
How to read it
Read this as the take-home gross profit one customer produces in a year, before operating expense. A rising trend means ARPU is climbing, gross margin is improving, or both — all healthy. A flat or falling trend, even while total revenue grows, signals unit-level profitability erosion you should diagnose by splitting it back into ARPU and gross margin. Never read it in isolation: divide it into CAC to get a payback period — $1.4K of margin against $2K CAC is roughly 17 months (slow); $2K+ of margin against the same CAC clears inside a year (efficient). Segment it by product line or cohort, because a blended figure can mask one high-margin product subsidizing a thin-margin one, and pair it with retention — strong per-unit margin paired with high churn still falls short of sustainability.
What good looks like
Good
Gross margin per unit is stable or rising year over year and recovers CAC well inside the customer's lifetime — payback comfortably under a year, with per-unit margin clearly outrunning the cost to acquire that unit.
Watch
Gross margin per unit is flat or slipping under rising COGS or a falling margin even as ARPU holds, and CAC payback is stretching past 12 months.
Bad
Gross margin per unit is near zero or negative, or COGS is growing faster than revenue so per-unit margin erodes while headline revenue still climbs — the unit model cannot fund its own acquisition.
Watch-outs
- Loading non-direct costs into COGS. R&D, sales, marketing, and G&A are operating expenses, not cost of goods — bundle them into 'cost of revenue' and gross margin is understated and this metric misleads. Keep COGS to direct costs: hosting, support labor, payment and credit-card processing, third-party APIs, and direct fulfillment.
- Applying one blended gross margin across cohorts with different economics. If a core product runs 80% margin and a managed-services add-on runs 40%, a single blended rate hides which line actually contributes — weight the margin or segment the metric by product line.
- Reading the number without payback context. Gross margin per unit is the numerator, not the answer; divide it into CAC to get a payback period before judging whether the unit economics clear.
- Mixing annualized and monthly inputs. The metric is annual by construction — pair annual ARPU with the gross margin for the same window, or the per-unit figure will be off by a factor of twelve.
- Using period-average unit counts inconsistently. Pick closing counts for ARPU and hold to them across periods; switching between average and closing counts breaks month-to-month comparability.
Worked example
Hypothetical
You have 1,000 active recurring customers generating $2M in annual revenue, so ARPU is $2,000. Direct COGS — hosting, support, and payment fees — runs $600K, leaving $1.4M of gross profit and a 70% gross margin. Gross margin per unit is $2,000 × 0.70 = $1,400 of annual gross profit per customer.
Variants & windows
The same metric re-expressed by a mechanical transform — a trailing window, a growth rate, a per-unit scaling, or a book/segment cut. Each is computed from Average Annual Gross Margin Per Unit above.
- Average Annual Gross Margin Per Unit (CARR) Contracted basis
- Average Annual Gross Margin Per Unit (CARR) Growth Rate Growth rate · Contracted basis
- Average Annual Gross Margin Per Unit (CARR) T3M Trailing 3-month · Contracted basis
- Average Annual Gross Margin Per Unit (CARR) T3M Growth Rate Growth rate · Trailing 3-month · Contracted basis
- Average Annual Gross Margin Per Unit (CARR) TTM Trailing 12-month · Contracted basis
- Average Annual Gross Margin Per Unit (CARR) TTM Growth Rate Growth rate · Trailing 12-month · Contracted basis
- Average Annual Gross Margin Per Unit (Contracted User) Contracted book
- Average Annual Gross Margin Per Unit (Contracted User) Growth Rate Growth rate · Contracted book
- Average Annual Gross Margin Per Unit (Contracted User) T3M Trailing 3-month · Contracted book
- Average Annual Gross Margin Per Unit (Contracted User) T3M Growth Rate Growth rate · Trailing 3-month · Contracted book
- Average Annual Gross Margin Per Unit (Contracted User) TTM Trailing 12-month · Contracted book
- Average Annual Gross Margin Per Unit (Contracted User) TTM Growth Rate Growth rate · Trailing 12-month · Contracted book
- Average Annual Gross Margin Per Unit (LARR) Live ARR basis
- Average Annual Gross Margin Per Unit (LARR) Growth Rate Growth rate · Live ARR basis
- Average Annual Gross Margin Per Unit (LARR) T3M Trailing 3-month · Live ARR basis
- Average Annual Gross Margin Per Unit (LARR) T3M Growth Rate Growth rate · Trailing 3-month · Live ARR basis
- Average Annual Gross Margin Per Unit (LARR) TTM Trailing 12-month · Live ARR basis
- Average Annual Gross Margin Per Unit (LARR) TTM Growth Rate Growth rate · Trailing 12-month · Live ARR basis
- Average Annual Gross Margin Per Unit (Live User) Live book
- Average Annual Gross Margin Per Unit (Live User) Growth Rate Growth rate · Live book
- Average Annual Gross Margin Per Unit (Live User) T3M Trailing 3-month · Live book
- Average Annual Gross Margin Per Unit (Live User) T3M Growth Rate Growth rate · Trailing 3-month · Live book
- Average Annual Gross Margin Per Unit (Live User) TTM Trailing 12-month · Live book
- Average Annual Gross Margin Per Unit (Live User) TTM Growth Rate Growth rate · Trailing 12-month · Live book
- Average New Annual Gross Margin Per Unit (CARR) New · Contracted basis
- Average New Annual Gross Margin Per Unit (CARR) Growth Rate New · Growth rate · Contracted basis
- Average New Annual Gross Margin Per Unit (CARR) T3M New · Trailing 3-month · Contracted basis
- Average New Annual Gross Margin Per Unit (CARR) T3M Growth Rate New · Growth rate · Trailing 3-month · Contracted basis
- Average New Annual Gross Margin Per Unit (CARR) TTM New · Trailing 12-month · Contracted basis
- Average New Annual Gross Margin Per Unit (CARR) TTM Growth Rate New · Growth rate · Trailing 12-month · Contracted basis
- Average New Annual Gross Margin Per Unit (Contracted User) New · Contracted book
- Average New Annual Gross Margin Per Unit (Contracted User) Growth Rate New · Growth rate · Contracted book
- Average New Annual Gross Margin Per Unit (Contracted User) T3M New · Trailing 3-month · Contracted book
- Average New Annual Gross Margin Per Unit (Contracted User) T3M Growth Rate New · Growth rate · Trailing 3-month · Contracted book
- Average New Annual Gross Margin Per Unit (Contracted User) TTM New · Trailing 12-month · Contracted book
- Average New Annual Gross Margin Per Unit (Contracted User) TTM Growth Rate New · Growth rate · Trailing 12-month · Contracted book