Finance, metrics & runway

Early boards live on burn multiple, runway with a hiring plan, and whether you are default alive. Retention slides need GRR beside NRR so expansion cannot mask a leaky base. Later boards add Rule of 40 with an explicit profit definition, and magic number / CAC payback when GTM efficiency is the question. At Series A you usually need CFO-level work before you need a full-time CFO. Pick the spoke or tool for the decision in front of you. Not legal, tax, or investment advice.

Spokes in this cluster

• Burn multiple vs Rule of 40: Burn multiple = net burn ÷ net new ARR (Sacks / Craft, April 2020). Rule of 40 = growth % + profit % (Feld, February 2015). Early pack: burn trend. Later: add Rule of 40 and say which profit. Bessemer’s Rule of X is a late-stage valuation frame, not a Seed slide.
• NRR vs GRR for the board pack: GRR is the leak check (capped at 100%). NRR includes expansion and can exceed 100%. ChartMogul formulas; SaaS Capital and Bessemer bands stay on separate rows. If GRR is 70% and NRR looks strong, expansion is hiding churn.
• Fractional vs full-time CFO: at Series A you need the model, board pack, and raise prep. Kruze: usually not a full-time CFO yet. Bessemer community: many CFOs land at $10M–$25M ARR. Majhi B2B SaaS: often months 12–24 after A, or pre-B.

Tools in this cluster

• Runway calculator with hiring plan: snapshot runway (Kruze) plus months to cash-out with hires, plus a Paul Graham–style default alive / default dead read. Headcount often 60–80% of burn (Kruze). With Carta’s Q1 2024 medians of 766 days Seed→A and 824 days A→B, you need a bigger buffer.
• Magic number & CAC payback calculator: Scale-style magic number next to gross-margin CAC payback. Scale Studio long-term median 0.7. ChartMogul’s invest/pull-back bands (~0.75 / ~0.5) come from a different publisher. Bessemer payback targets by segment.

Which metric → when → where

Empty cells stay empty. Each row comes from a different publisher and answers a different board question. A FounderNexus session pushed on the same three things: stage-right metrics, GRR beside NRR, and default alive with the hire dates written down. That is session judgment, not a survey.

Stage sketch for the pack

Seed to early Series A (still burning). Lead with burn multiple trend (Sacks bands: under 1× amazing through over 3× bad; seed may sit near 3×, post-A toward ~2×). Show net burn and net new ARR as separate lines. Put snapshot runway and the hire ladder on one page with the runway calculator. If net new ARR is zero, burn multiple does not compute (Sacks). Keep burn low and get to first revenue.

Growth / later raise prep. Keep burn multiple while you are still cash-negative. Add Rule of 40 with an explicit profit definition (Feld prefers EBITDA; Bessemer often uses FCF margin in Rule of X). Bessemer: early negative-FCF companies should prefer an attractive burn multiple (~1×–1.5×); Rule of X is less relevant there.

Any recurring-revenue board. Show GRR and NRR for the same cohort and period. SaaS Capital (2023, >$1M ARR): median NRR 102%, median GRR 91%; table stakes GRR at least ~90%. Label Bessemer SotC 2019 segment aims and ChartMogul Dec 2025 medians by source. Do not average 102% with 82%.

GTM debate on the table. Magic number with prior-quarter S&M in the denominator. CAC payback on gross margin. Show Scale’s 0.7 median and ChartMogul’s ~0.75 / ~0.5 bands as separate rows.

Finance org. Put a bookkeeper and controller under the strategy seat. Buy fractional help for the model and pack until you hit an upgrade trigger (fractional vs full-time CFO). Pair with the Series A leadership hiring sequence when the board asks which exec seat comes first.

Sources

• David Sacks, The Burn Multiple (Craft Ventures / Medium) — 23 April 2020. Formula; tier chart; stage guidance.
• Brad Feld, The Rule of 40% For a Healthy SaaS Company — 25 February 2015. Growth + profit ≥ 40; scale caveat.
• Bessemer Venture Partners, The Rule of X — Rule of 40 restated; early-stage prefer burn multiple ~1×–1.5×.
• ChartMogul, NRR and GRR — movement formulas; masking warning; Dec 2025 sample.
• SaaS Capital, Research Brief 28: 2023 B2B SaaS Retention Benchmarks (PDF) — median NRR 102% / GRR 91%; ≥90% GRR table stakes.
• Bessemer Venture Partners, State of the Cloud 2019 and Scaling to $100 Million — segment GRR/NRR aims; CAC payback targets by segment.
• Scale Venture Partners, From $0 to $1M: The Magic of 0.7 — Dale Chang, 17 Sep 2021. Scale Studio long-term median magic number 0.7. See also SaaS Metrics: A History of the Magic Number.
• ChartMogul, SaaS metrics cheat sheet — magic number invest/pull-back framing; CAC payback through gross margin.
• Paul Graham, Default Alive or Default Dead? — October 2015. Alive/dead test; hiring too fast as the biggest killer after a raise.
• Kruze Consulting, rolling cash forecast / runway — cash ÷ net burn; headcount 60–80% of burn. When a startup needs a CFO — Series A generally fractional first.
• Carta, State of Private Markets Q1 2024 — median Seed→A 766 days; A→B 824 days.
• FounderNexus — founder session. Stage-right board metrics; GRR beside NRR; default alive with hire dates. Not a survey.

Related

• Burn multiple vs Rule of 40
• NRR vs GRR for the board pack
• Fractional vs full-time CFO
• Runway calculator with hiring plan
• Magic number & CAC payback calculator
• Series A leadership hiring sequence
• Hiring executives

Board metrics and runway calls are ops decisions. Founders who have walked burn, retention, and default alive through a raise or a board pack will pressure-test your pack in a FounderNexus session.