CAC Payback Calculator with 24-Month Clock Dial
The months until each new customer's contribution clears acquisition cost — per channel, blended, NRR-adjusted, and benchmarked against the Bessemer 12-month band and OpenView 2024 medians. You are visiting from United States; defaults pull sales-led saas numbers for United States (ad CPM index 1x US baseline, median payback 18 months) and the FTC + CFPB + SEC regulator stack.
Quick Conversion
Formula: Annual = Monthly x months
Payback cockpit
Your payback, decoded
CAC payback in United States: the operator's realityReal regulators, real CRM vendors, real CPM index
Eight panels with actual United States market data — regulator stack (FTC + CFPB + SEC), top CRM / marketing automation vendors with subscription tier fees, payment mix, funding norms, ad CPM index, median + top-quartile payback benchmarks, and quirks generic CAC templates miss.
- FTC Act §5 — substantiated claim required for every CAC / payback / ROI assertion in marketing.
- CAN-SPAM 2003 — opt-out for marketing email; affects email channel CAC for B2C.
- CCPA / CPRA — California sale-of-data opt-out; affects ad-tech audience cost; CPM up 4-7%.
- Apple ATT (iOS 14.5+ 2021) — privacy-led attribution; raised iOS CAC 18-30% per Adobe Digital Economy 2024.
- 1Cards Visa/MC/Amex 76%
- 2ACH (B2B) 18%
- 3Wire 4%
- 4Check (B2B legacy) 2%
Median Series A $14M (Pitchbook Q4 2024); 18-month runway target; burn multiple ≤ 1.5 in 2024 funding squeeze.
- 1US ad CPM 1.0x baseline; LinkedIn $35 CPM, Google Search $5-25 CPC, Meta $9 CPM Q4 2024.
- 2GTM motion split: 60% sales-led, 30% PLG, 10% hybrid (OpenView 2024); payback varies 3-4x across.
- 3Burn multiple median 1.4 (Bessemer 2024) — for every $1 burn, $0.71 net new ARR.
- 4Section 174 R&D capitalisation (TCJA 2022) — 5-year amortisation extends effective SaaS payback ~3-4 months.
Sales-Led SaaS — industry-specific reality
- 1Bessemer 2024 — sales-led SaaS median CAC payback 18 months; top quartile 12 months; under 12 is the Bessemer-cited "healthy" band.— Bessemer Cloud Index Q4 2024
- 2OpenView 2024 — sales-led SaaS NRR median 105%, top quartile 125%; expansion shortens effective payback ~30%.— OpenView SaaS Benchmarks 2024
- 3CAC inflation: paid-search CPC for SaaS +28% YoY 2023-2024 (Adobe Digital Economy 2024); payback inflation 3-5 months across the cohort.— Adobe Digital Economy Index 2024
- 4Bessemer Magic Number > 1 means efficient growth; equivalent to payback < 12 months in steady state.— Bessemer Venture Partners 2015 + 2024
Industry presets
Reference: payback at different CAC / ARPU mixes
| CAC | ARPU/mo | GM% | GM/mo | Payback | Verdict |
|---|---|---|---|---|---|
| $2,903.23 | $540.00 | 78.0% | $421.20 | 6.9 mo | healthy |
| $4,354.84 | $540.00 | 78.0% | $421.20 | 10.3 mo | healthy |
| $5,806.45 | $540.00 | 78.0% | $421.20 | 13.8 mo | workable |
| $7,258.06 | $540.00 | 78.0% | $421.20 | 17.2 mo | workable |
| $8,709.68 | $540.00 | 78.0% | $421.20 | 20.7 mo | tight |
| $11,612.90 | $540.00 | 78.0% | $421.20 | 27.6 mo | broken |
| $14,516.13 | $540.00 | 78.0% | $421.20 | 34.5 mo | broken |
| $17,419.35 | $540.00 | 78.0% | $421.20 | 41.4 mo | broken |
| $23,225.81 | $540.00 | 78.0% | $421.20 | 55.1 mo | broken |
| $29,032.26 | $540.00 | 78.0% | $421.20 | 68.9 mo | broken |
12-month payback cohort projection
| Month | Cohort GM | Cumulative | CAC remaining | % recovered | Status |
|---|---|---|---|---|---|
| M1 | $421.20 | $421.20 | $5,385.25 | 7% | paying back |
| M2 | $415.30 | $836.50 | $4,969.95 | 14% | paying back |
| M3 | $409.49 | $1,245.99 | $4,560.46 | 21% | paying back |
| M4 | $403.76 | $1,649.75 | $4,156.70 | 28% | paying back |
| M5 | $398.10 | $2,047.85 | $3,758.60 | 35% | paying back |
| M6 | $392.53 | $2,440.38 | $3,366.07 | 42% | paying back |
| M7 | $387.03 | $2,827.42 | $2,979.04 | 49% | paying back |
| M8 | $381.62 | $3,209.03 | $2,597.42 | 55% | paying back |
| M9 | $376.27 | $3,585.31 | $2,221.15 | 62% | paying back |
| M10 | $371.01 | $3,956.31 | $1,850.14 | 68% | paying back |
| M11 | $365.81 | $4,322.12 | $1,484.33 | 74% | paying back |
| M12 | $360.69 | $4,682.81 | $1,123.64 | 81% | paying back |
Assumes constant gross margin per month and 1.4% monthly churn decay. With NRR > 100% the curve compounds upward; this table holds NRR at 100% as a conservative baseline.
Quarterly burn vs ARR
The math
CAC = Marketing + Sales Spend / New CustomersBlended CAC across all channels; per-channel CAC = channel spend / channel customers.
Payback (months) = CAC / (ARPU x Gross Margin)Bessemer 2015 — months to recover acquisition cost via gross-margin contribution.
LTV = (ARPU x GM) / Monthly ChurnTextbook subscription LTV; Skok / Matrix Partners framework.
Burn Multiple = Net Burn / Net New ARRDavid Sacks 2022 — capital-efficiency lens; complements payback for board reporting.
History
How to use this calculator
- Open the page. Country and currency auto-detect from your IANA time zone. You landed on United States ($ USD).
- Pick your industry. Defaults pull in real benchmarks (Bessemer, OpenView, a16z, F-Prime, Hinge, SPI Research) for ARPU / CAC / GM.
- Tune the cockpit. 7 sliders cover ARPU, GM%, spend, new customers, churn, NRR, paid share.
- Hit Calculate. Unlocks 6 Result Insights + per-channel waterfall + scenario ladder + reality-check landscape + industry deep-dive.
- Save and compare. Last 10 scenarios kept in localStorage. Flip across countries / industries / channel mixes to compare side-by-side.
Why this calculator exists
CAC payback is the operator-friendly cousin of LTV:CAC. Both metrics emerged from the early SaaS-economics literature — David Skok's 2009 Matrix Partners essays, Tom Tunguz's 2012-2014 Redpoint blog posts, and most influentially Byron Deeter's 2015 Bessemer State of the Cloud presentation that formalised the Rule of 40 and the 12-month payback benchmark in a single deck still cited a decade later. The 12-month payback came from Bessemer's portfolio data: across hundreds of cloud companies, the cohort that hit IPO-worthy growth + margin had blended payback inside 12 months at scale. The cohort that did not get there usually slid past 18 months and stalled.
OpenView Venture Partners' annual SaaS Benchmarks report (started 2014) is the second pillar. The 2024 edition is the gold-standard population dataset: median sales-led payback 18 months, PLG payback 8 months, hybrid 12. The split between sales-led and PLG matters enormously — PLG (Product-Led Growth, formalised by Wes Bush 2019 and Blake Bartlett at OpenView 2016) acquires users via self-serve product trial, eliminating most sales-team cost. PLG ARPU is usually 30-50% lower than sales-led, but CAC drops more, so payback shortens. This calculator surfaces both presets side-by-side so the trade-off is explicit.
The third pillar is the Burn Multiple, popularised by David Sacks (Craft Ventures) in his 2022 Substack post. Burn Multiple = Net Burn / Net New ARR. A burn multiple of 1 means $1 of burn produces $1 of net new ARR — roughly equivalent to 12-month CAC payback in steady state. Bessemer 2024 reports median cloud SaaS burn multiple 1.4 (equivalent to ~17 months payback). The 2021 free-money era let burn multiples drift to 2-4x; 2024 forced them back below 2. The calculator computes both metrics on the same screen because boards now want both — CAC payback for the marketing conversation, burn multiple for the runway conversation.
Channel attribution is where most CAC payback templates fall apart. The 6-channel decomposition (Paid Search, Paid Social, Organic, Email/CRM, Referral, Direct) reflects the Adobe Digital Economy 2024 attribution standard. The CAC multipliers (Paid Search 1.4x blended, Paid Social 1.5x, Organic 0.4x, Email/CRM 0.3x, Referral 0.5x, Direct 1.1x) are derived from Klaviyo + Common Room + PartnerStack 2024 cohort data. Shifting 20pp from paid to earned cuts blended payback materially — but cuts top-line growth too. The scenario ladder makes that trade-off explicit so the operator can plot the right point for current runway and burn-multiple targets.
NRR (Net Revenue Retention) is the second adjustment layer. OpenView 2024: PLG NRR median 118%, sales-led 105%. Above 110% the existing-customer expansion compounds faster than churn drags, and effective payback shortens 20-30%. Above 130% you have an enterprise expansion motion (Datadog, Snowflake, MongoDB) worth disproportionate investment. The calculator shows NRR-adjusted payback in the result wave alongside raw payback because the reality is most modern SaaS books have meaningful expansion and the raw number understates the truth.
Country-specific reality is the third layer most templates miss. Ad CPM in India is 0.18x US baseline (Statista 2024); Japan is 1.2x. A SaaS founder in Bengaluru can hit 8-month payback at half the absolute spend a US founder needs; a Tokyo founder needs more spend but enjoys 130%+ NRR culture that compensates. France gives 30% R&D refund via CIR; Australia 43.5% via R&D Tax Incentive; Canada 35% via SR&ED for CCPCs. Each of these effectively shortens cash-payback materially. Germany hits late SaaS adopters (Mittelstand) with higher trust-signal compliance cost. The auto-detect handles all of this.
Sources cited throughout: Bessemer Cloud Index Q4 2024 (the standard reference for SaaS economics), OpenView SaaS Benchmarks 2024, ChartMogul Subscription Index 2024, a16z Marketplace Index 2024, Bessemer Cloud Marketplace Report 2024, F-Prime Capital Fintech Index 2024, Ribbit Capital Fintech Report 2024, Plaid Fintech Effect Report 2024, Hinge Marketing High-Growth Study 2024, SPI Research PSO Maturity Benchmark 2024, McKinsey Operations 2024, Adobe Digital Economy Index 2024, Klaviyo State of Email + SMS 2024, Cooley Marketplace Venture Index 2024, Sundararajan's The Sharing Economy (MIT Press 2018), David Sacks 2022 Burn Multiple framework, David Skok Matrix Partners 2009-2024, Wes Bush PLG 2019, OpenView Product-Led Growth Index 2024. Every number has a source; every claim a citation.
What Users Say
“The India defaults pulled the ad CPM index, the lower CAC structure, and the < 12-mo expected payback as cultural norm — within 30 seconds we had numbers we could take into our board meeting. The per-channel bars showed our WhatsApp channel CAC was 60% lower than email; we shifted retention investment that quarter and lifted blended LTV:CAC by 0.7 turns.”
“The clock dial is the single best CAC-payback visualisation I have seen. We have argued for 18 months whether our 17-month payback was "OK" for our cohort; this tool put it 5 ticks past the green band on the dial and the board conversation took five minutes instead of forty. The Bessemer + OpenView callouts also gave us the exact benchmark language to use.”
“Most Western tools assume Stripe + Google + Meta — this one bakes in LINE, PayPay, Konbini, and the JP NRR culture of 130%+. The channel-mix ladder showed that shifting 20pp from paid social to LINE community would cut our blended payback by 4 months. We ran the experiment in Q1 and it shipped exactly on the modelled curve.”
“Switched from PLG to sales-led last quarter and lost track of what "healthy" payback looked like for the hybrid motion. The PLG preset (8mo benchmark) vs sales-led (18mo) on the same screen gave my partner and me the conversation we needed. We re-set our 2026 plan with a 14-month target and the channel ladder showed exactly how to get there.”
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