Revenue Model Glossary: 40 Terms Every Operator Should Know (CPM, RPM, ARPU, LTV, CAC, ROAS…)

Cost an advertiser pays per 1,000 ad impressions.

Formula: Spend ÷ Impressions × 1,000

Example: A finance advertiser bids $35 CPM on YouTube.

Common misuse: Treating CPM as creator income — it isn't, RPM is.

What the creator/publisher earns per 1,000 video views or pageviews, after the platform's cut and fill-rate losses.

Formula: Net revenue ÷ Views × 1,000

Example: A US finance channel clears $12 RPM.

Common misuse: Comparing RPM across platforms with different cuts (YouTube long-form vs Shorts vs TikTok).

Effective CPM — total revenue normalized to a per-1,000-impression rate, used to compare ad units of different formats.

Formula: Revenue ÷ Impressions × 1,000

Example: Direct-sold sponsorship eCPM of $45 vs programmatic $8.

Common misuse: Mixing eCPM and CPM in the same comparison table.

Share of ad opportunities that actually serve a paid ad.

Formula: Filled impressions ÷ Ad requests

Example: 60% fill rate during a Q1 advertiser pullback.

Common misuse: Assuming 100% fill in revenue models.

Share of served ads that meet the IAB 'in-view' standard (50% of pixels for 1+ seconds).

Example: Sticky footer ad at 82% viewability vs lazy-loaded mid-content unit at 38%.

Common misuse: Quoting CPM without normalizing for viewability.

Three flavors of publisher-side revenue density — per pageview, per session, per visitor.

Example: AdSense quotes page RPM; Mediavine quotes session RPM; Ezoic quotes EPMV.

Common misuse: Comparing networks on different metrics without normalizing.

Monthly / Annual Recurring Revenue — the contracted recurring portion of revenue.

Formula: MRR = Active subs × ARPU; ARR = MRR × 12

Example: $80k MRR = $960k ARR.

Common misuse: Including one-time setup fees or services revenue in MRR.

Average Revenue Per User / Account.

Formula: Total revenue ÷ Customer count

Example: $120 ARPU on a $99 base plan with some upsells.

Common misuse: Computing ARPU on a window that includes one-time fees.

Fully-loaded cost to acquire a customer.

Formula: (Sales spend + Marketing spend) ÷ New customers

Example: $10k spend ÷ 25 new customers = $400 CAC.

Common misuse: Including ad spend but not sales salaries.

Total gross profit a customer generates over their lifetime.

Formula: (ARPU × Gross Margin) ÷ Monthly Churn

Example: $100 × 0.8 ÷ 0.03 = $2,667 LTV.

Common misuse: Using revenue instead of gross profit.

Ratio of lifetime value to acquisition cost.

Example: $2,667 ÷ $400 = 6.7:1.

Common misuse: Reporting a 5:1 ratio while ignoring a 36-month payback period.

Months to recover acquisition cost from gross-margin-adjusted revenue.

Formula: CAC ÷ (ARPU × Gross Margin)

Example: $400 ÷ ($100 × 0.8) = 5 months.

Common misuse: Forgetting the gross-margin term.

Revenue minus cost-of-goods-sold (hosting, payment fees, support COGS).

Formula: (Revenue – COGS) ÷ Revenue

Example: $1M revenue – $220k COGS = 78% gross margin.

Common misuse: Reporting 'SaaS margin' as 95% by excluding support, infrastructure, and processing.

Gross margin minus variable customer-acquisition costs.

Example: 78% gross – 12 points of variable CAC = 66% contribution.

Common misuse: Confusing with gross margin in unit economics decks.

Logo = % of customers lost; Revenue = % of MRR lost.

Example: 3% logo churn but 1% revenue churn (small accounts churn more).

Common misuse: Quoting only logo churn when small accounts churn faster than enterprise.

Revenue from existing cohort one period later, including expansion.

Formula: (Starting MRR + Expansion – Churn – Contraction) ÷ Starting MRR

Example: 112% NRR — expansion outpaces churn.

Common misuse: Including new logo revenue (that's GRR / total growth, not NRR).

NRR floor — same calculation but capped at 100% (no expansion credit).

Example: GRR 92% means you lose 8% of an existing cohort to churn/contraction per year.

Common misuse: Confusing GRR and NRR in board decks.

Mean order size.

Formula: Revenue ÷ Orders

Example: $85 AOV on a Shopify store.

Common misuse: Calculated against gross revenue including refunds.

Share of visitors who place an order.

Formula: Orders ÷ Sessions

Example: 2.1% CR on apparel.

Common misuse: Quoting site-wide CR when paid-traffic CR is 3× higher than organic.

Share of customers placing a second order within a window.

Example: 28% 90-day repeat rate.

Common misuse: Treating repeat rate as a substitute for cohort retention.

CAC = cost per acquired customer; CPA = cost per a defined action (lead, signup).

Example: $40 CPA on email signups, $300 CAC on paid customers.

Common misuse: Using CPA in LTV:CAC ratios.

Revenue ÷ ad spend for a campaign.

Formula: Revenue ÷ Ad Spend

Example: $25k revenue on $5k spend = 5× ROAS.

Common misuse: Reporting ROAS on gross revenue without subtracting COGS — gross-margin-adjusted ROAS is the honest version.

Ad spend as % of ad-attributed revenue. ROAS inverted.

Formula: Ad Spend ÷ Ad Revenue

Example: 25% ACoS = 4× ROAS.

Common misuse: Comparing ACoS across products with different margins.

Cashflow = money in/out this period; revenue = recognized per accounting standard.

Example: $120k annual contract = $10k MRR on P&L but $120k cash on day one.

Common misuse: Modeling growth budget against MRR while paying bills from cash.

Months until you run out of cash at current burn.

Formula: Cash ÷ Monthly Net Burn

Example: $600k cash ÷ $50k burn = 12 months.

Common misuse: Computing runway against gross burn instead of net (revenue offsets burn).

Net burn ÷ Net new ARR. Measures capital efficiency.

Example: $200k burn on $250k new ARR = 0.8× — excellent.

Common misuse: Computing on a single great month and extrapolating.

SaaS health check: growth rate + profit margin ≥ 40%.

Example: 30% growth + 12% margin = 42% — healthy.

Common misuse: Adding GAAP margin and ARR growth from different periods.

Sponsor pay per 1,000 audience members (impressions, downloads, or opens).

Example: $25 CPM newsletter sponsorship × 40k opens = $1,000.

Common misuse: Quoting CPM on subscriber count, not on actual opens or views.

Lump-sum sponsorship payment, no per-impression math.

Example: $3,500 flat for a YouTube integration.

Common misuse: Comparing flat-fee deals to CPM deals without converting to a common rate.

How deeply the sponsor is woven into the content (logo bug → 60-sec dedicated segment → full dedicated piece).

Example: 30s mid-roll vs full sponsored video — 3–5× rate difference.

Common misuse: Quoting a single CPM across all integration depths.

Whether the sponsor can re-use the creator's content in their own ads.

Example: Adding 6-month paid-usage rights adds 30–80% to fee.

Common misuse: Granting usage rights for free.

15.3% combined Social Security + Medicare on net self-employment earnings.

Example: $80k net × 0.9235 × 15.3% = $11,304.

Common misuse: Treating it as 'optional' or thinking the standard deduction reduces it.

Marginal = rate on next dollar; effective = total tax ÷ total income.

Example: 37% marginal but 28% effective.

Common misuse: Quoting marginal rate when effective is the planning number.

US withholding applied to non-US creators with no W-8BEN, or US payees with no W-9.

Example: $10k AdSense × 24% = $2,400 withheld.

Common misuse: Assuming you'll get it all back without filing.