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Analyze Cash Runway and Model Spend-Cut Options

Calculates current runway and zero-cash date, then models how specific spend-cut options extend runway with their trade-offs.

Optimized for
ChatGPTClaude
§ When to use this

Runway is simple arithmetic until you start asking 'what if we cut X?' — then it becomes a set of trade-offs you have to reason about, not just calculate. This prompt does both: it computes your current runway and zero-cash date, then models how specific spend cuts change that picture and what each one costs you operationally. The trade-off framing is the point. Any cut extends runway; the question is which cuts buy the most months for the least damage to growth. By asking for the qualitative cost of each option and a recommended sequencing, the prompt helps you build a plan that hits a target runway while protecting the things that actually grow the business. It also names the one cut to avoid, which is often more useful than the cuts to make. All projections are estimates based on the burn you provide, so feed it an honest net burn and real cash position. This is a thinking aid for hard decisions, not a substitute for your board's judgment.

§ The Prompt— fill in the fields, then copy or open in a tool
§ Customize0/6 fields filled
your prompt — fill the fields above
You are an expert founder-CFO performing a runway analysis for [COMPANY NAME]. Given a current cash balance of [CASH BALANCE], a net monthly burn of [MONTHLY BURN], and expected near-term cash movements [EXPECTED CASH CHANGES], calculate the current runway in months and the projected zero-cash date. Then model how runway changes under these spend-reduction options I'm considering: [SPEND CUT OPTIONS]. For each option, show the new monthly burn, the new runway, and the qualitative trade-off (what the business loses). Recommend a sequencing of cuts that extends runway to at least [TARGET RUNWAY] months while protecting growth, and name the one cut I should avoid. Treat all projections as estimates based on the stated burn.
Open with your prompt →ChatGPTClaudeSends your filled-in prompt straight into a new chat.
§ Example Output

What you can expect back

Runway analysis — Northwind Labs (estimates):

Current: $1.4M / $160K net burn ≈ 8.8 months, zero-cash around mid-Feb 2028 (the July tax outflow and August prepayment roughly offset).

Cut options:
- Pause two open roles (-$30K): burn → $130K, runway ≈ 10.8 months. Trade-off: slower roadmap, but no impact to current team or revenue.
- Drop the $15K tool: burn → $145K, runway ≈ 9.7 months. Trade-off: minimal, since it's underused.
- Cut paid acquisition (-$25K): burn → $135K, runway ≈ 10.4 months. Trade-off: directly slows new pipeline and growth.

Recommended sequencing: drop the tool first (near-zero cost), then pause the open roles. Combined burn ≈ $115K → runway ≈ 12.2 months. To reach 18 months you'd need either deeper cuts or new revenue/financing — these three alone won't get there without touching growth.

Avoid: cutting paid acquisition last, since it's the lever most tied to revenue.

Illustrative example — your results will vary by tool and inputs.

§ Pro Tips

Get sharper results

  • 01Use net burn, not gross — runway math is only right if revenue is netted against spend.
  • 02List cuts with both their savings and what they protect or harm; the sequencing recommendation depends on that trade-off, not just the dollars.
  • 03Include lumpy items like tax payments; they shift the zero-cash date even when monthly burn looks steady.
  • 04Be honest if the cuts can't reach your target — it's better to learn that here than to assume a plan that doesn't close the gap.
§ Variations

Adapt it for your case

Add a revenue lever

Include an expected revenue ramp and ask it to show runway with cuts plus growth, not cuts alone.

Bridge to a raise

Set the target as 'survive until a Q1 raise closes' and ask for the minimum cuts needed to clear that date with a buffer.

Severity tiers

Ask for three cut packages — light, moderate, and aggressive — each with its resulting runway and growth cost.

Best For — Roles
Tags#runway#burn-rate#cash-flow
§ FAQ

Common questions

Is the zero-cash date a real deadline?

It's a projection at your stated burn, including the lumpy items you list. Burn changes, so treat it as a planning marker you re-check monthly, not a fixed date.

Why does it tell me which cut to avoid?

Because the cheapest cut on paper can be the most damaging to growth. Naming the one to protect helps you extend runway without quietly strangling revenue.

What if no combination hits my target?

The prompt will say so plainly, which is the useful answer. It signals you need new revenue or financing rather than deeper cuts — better to know before committing to a plan.

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