<p><strong><em>tl;dr: Cash divided by average net burn is a useful baseline, but it cannot show whether today’s spending will carry the company to its next evidence-producing milestone. The Burn Rate Thermostat gives leadership a five-part operating view of actual cash and net burn, committed burn, scenario runway, burn-to-milestone, and pre-agreed decision triggers, so changes produce decisions before they become board surprises.</em></strong></p><hr><p>At the end of the month, you open the finance spreadsheet.</p><p>The bank balance is lower than expected. Payroll has gone up. A vendor invoice arrived early. A customer payment did not.</p><p>Now the leadership team is reconstructing what happened while everyone quietly does the runway arithmetic: how many months disappeared between the last board meeting and this one?</p><p>This is less like financial management and more like receiving a lab result after the symptoms have already changed.</p><p>Technical founders rarely tolerate that kind of observability gap in a product. You would not run production infrastructure with one delayed metric, no alerts, and several large commitments living in someone’s memory.</p><p>Yet plenty of startups monitor cash that way.</p><p>In <a href="https://www.linkedin.com/pulse/your-product-6-months-ahead-market-internal-reporting-maciejewski-39zge/" target="blank" rel="noopener noreferrer">an earlier edition on decision-ready reporting</a>, I argued that a dashboard should help you decide, not merely describe what happened. Burn needs the same treatment.</p><p><strong>A bank balance is a state variable. It is not a control system.</strong></p><p>Financial visibility is not about producing a prettier month-end report. It should tell you whether today’s spending is likely to carry the company to its next evidence-producing milestone, while there is still time to change course.</p><p>### The runway number is a baseline, not a forecast</p><p>The familiar runway calculation is simple:</p><blockquote>Available cash / average monthly net burn = estimated runway</blockquote><p><a href="https://pilot.com/blog/burn-rate-calculation-startup-runway-calculator" target="blank" rel="noopener noreferrer">It is a useful baseline</a>. It also rests on a large assumption: revenue and expenses will behave roughly as they did during the period used for the average.</p><p>Startups are not known for this courtesy.</p><p>A hiring plan changes payroll. A clinical programme changes R&D spend. Cloud usage grows. Manufacturing deposits arrive in lumps. Receivables slip. Annual contracts renew. The spreadsheet says 14 months. <em>The commitments are less reassuring.</em></p><p><a href="https://carta.com/learn/startups/metrics/burn-rate/" target="blank" rel="noopener noreferrer">Carta’s guidance on burn rate</a> makes two points worth keeping together: net burn and runway are useful measures, but burn alone is not a complete measure of company health. There is no universal "good" burn rate. Stage, business model, reserves, and goals all matter.</p><p>So "How many months do we have?" is only the opening question.</p><p>You also need to ask: <strong>What assumptions produced that number, what is already committed, and what progress will the money buy?</strong></p><p>### Install a Burn Rate Thermostat</p><p>I use <strong>the Burn Rate Thermostat</strong> for a five-part operating view. It is a leadership model, not an accounting standard. Your accountant or finance lead still decides how items are treated in the books.</p><p>This model has another job: help the leadership team detect changes, understand their cause, and act before cash becomes panic.</p><p>#### 1. Actual cash and net burn</p><p>Start with the ground truth:</p><ul><li>unrestricted cash available to operate</li><li>gross cash outflow</li><li>net burn after cash revenue</li><li>the rolling trend, not one isolated month</li><li>actual versus budget, with material variances explained</li></ul><p>One month may include an annual payment or a delayed receipt. That does not make the variance irrelevant. It means you need to separate a temporary timing effect from a structural change in the cost base.</p><p>Ask one question first: <strong>What changed, and will it happen again?</strong></p><p>#### 2. Committed burn</p><p>Money in the bank is not necessarily available for a new decision.</p><p>Approved hires may not have started. Signed vendor work may not have been invoiced. Tax, lease, cloud, trial, manufacturing, or R\&D obligations may sit outside the current balance view. Customer invoices may be recorded before the cash arrives.</p><p><a href="https://pilot.com/blog/understanding-your-cash-flow" target="blank" rel="noopener noreferrer">Pilot’s cash-flow explanation</a> shows the timing problem: receivables and payables create a gap between the cash you can see and the economic commitments around it.</p><p>Build a forward commitments view with your finance lead. Include the obligations and approved plans that matter to leadership decisions, along with their expected timing.</p><p>The number leadership needs is the answer to this: <strong>How much of our visible cash is already spoken for?</strong></p><p>#### 3. Scenario runway</p><p>A single cash-zero date looks precise. Usually, it is <em>one scenario wearing a lab coat.</em></p><p>Build at least a base case and a downside case. Add an upside case when it changes a real decision. Make the drivers explicit: headcount, payroll, sales timing, churn, infrastructure, leases, trials, manufacturing, or whichever variables genuinely move cash in your company.</p><p>Do not count an uncommitted financing round as cash. A term sheet is not a bank transfer, and optimism is not a treasury function.</p><p><a href="https://pilot.com/blog/how-to-recession-proof-your-annual-budget" target="blank" rel="noopener noreferrer">Pilot’s scenario-planning guidance</a> recommends changing operating drivers and recalculating burn and the cash-zero date. The value is not the number of tabs in the model. It is seeing which assumption moves runway most.</p><p>Look for the driver with the largest effect and the assumption with the weakest case behind it. <strong>Which one would change your decision?</strong></p><p>#### 4. Burn-to-milestone</p><p>Lower burn is not automatically better. You can conserve cash and still arrive nowhere useful.</p><p>Every material spend should connect to one of these:</p><ul><li>an evidence-producing milestone</li><li>an operating necessity</li><li>an explicit risk-reduction decision</li></ul><p>For a SaaS company with meaningful recurring revenue, revenue growth and capital-efficiency measures may be useful. <a href="https://www.bvp.com/atlas/scaling-to-100-million" target="blank" rel="noopener noreferrer">Bessemer’s scaling guidance</a>, <a href="https://sacks.substack.com/p/the-burn-multiple-51a7e43cb200" target="blank" rel="noopener noreferrer">David Sacks’s Burn Multiple</a>, and <a href="https://carta.com/learn/startups/metrics/burn-rate/" target="blank" rel="noopener noreferrer">Carta’s burn-rate guidance</a> offer useful ways to think about that relationship. But for a pre-revenue deep-tech, biotech, medtech, clinical, hardware, or long-R\&D company, forcing everything into a revenue ratio can hide more than it reveals.</p><p>Define the milestone for your stage. It could be technical validation, regulatory progress, a manufacturing proof point, commercial evidence, or a customer outcome. Name the owner, date, evidence standard, remaining work, expected cash requirement, and one leading indicator of execution velocity.</p><p><strong>Burn becomes useful when you can see the evidence it is intended to buy.</strong></p><p>Then ask the uncomfortable question: <strong>Will current spend reach the next proof point before cash or decision time runs out?</strong></p><p>#### 5. Decision triggers</p><p>Visibility without a decision rule creates a very expensive viewing experience.</p><p>For each material risk, agree on:</p><ul><li>the threshold that triggers review</li><li>the person who owns the response</li><li>the action or options to prepare</li><li>the decision deadline</li><li>the escalation path</li></ul><p>Your company must choose its own thresholds with the right finance, board, and professional input. The point is to design the decision before the situation becomes emotional.</p><p>If milestone timing slips while committed burn stays fixed, reforecast runway and revisit scope, staffing, or sequence. If a material category exceeds plan, ask the owner to explain the driver and propose an action. If the downside case crosses a company-approved threshold, begin the agreed hiring, vendor, financing, or contingency review.</p><p>The review should end with three answers: <strong>What happens next, who decides, and by when?</strong></p><p>### Make it an operating cadence, not a finance ceremony</p><p>You do not need an expensive dashboard to start. A well-designed spreadsheet can do the job.</p><p>The discipline is in the review:</p><ol><li>Refresh actual cash, burn, commitments, and scenarios.</li><li>Compare actual performance with the assumptions used in the last forecast.</li><li>Update milestone timing and evidence.</li><li>Review only the variances and triggers that may change a decision.</li><li>Record the owner and deadline for each action.</li></ol><p>Run the light version often enough to catch a meaningful change. Use the proper finance close and board cadence for a deeper review. The right frequency depends on the volatility of your business and the quality of your data.</p><p>This makes the board conversation more useful too. A consistent actual-versus-forecast view gives investors a clearer basis for questions, as reflected in <a href="https://www.svb.com/commercial-cards-insights/corporate-card/startup-financial-management-best-practices/" target="blank" rel="noopener noreferrer">SVB’s financial-management guidance</a> and <a href="https://carta.com/learn/startups/metrics/burn-rate/" target="blank" rel="noopener noreferrer">Carta’s burn-rate guidance</a>. It does not guarantee confidence, funding, or valuation. It makes the assumptions, variances, and leadership response legible.</p><p>That is no-surprise governance in practical form.</p><p>### Audit one spend category this week</p><p>Choose one material spend category and ask:</p><ol><li>What has already been committed?</li><li>Which milestone, operating necessity, or risk decision does it support?</li><li>What evidence will tell us whether the spend is working?</li><li>What happens to runway if timing slips?</li><li>Which threshold would cause us to change the plan?</li></ol><p>An unclear answer does not automatically mean the spend should be cut. It means the decision logic is missing. Fix that first.</p><p>If building this view is difficult because finance, hiring, delivery, and product data live in separate systems, the spreadsheet is not the problem. The operating architecture around it is.</p><p>Your month-end report should not be the first time leadership notices the temperature changing.</p><p><strong>Use burn as a control loop: observe, compare, decide, and act.</strong></p><p>Next week: <strong>KPI Design for Grown-Ups: Metrics That Trigger Decisions.</strong> We will turn the same principle into a KPI Decision Contract, so a metric change produces an owner, a threshold, and an action instead of another dashboard screenshot.</p><p>Best,</p><p>Dr. Rob Konrad</p><p>P.S. Which number in your current financial view would make you change a decision this week? If the answer is "none," do you have a control system or only a report?</p><p>If you want help installing the operating architecture behind this view, learn more about <a href="https://www.FluentFounder.com" target="blank" rel="noopener noreferrer">The Fluent Founder</a>.</p><h2>References</h2><ul><li><a href="https://pilot.com/blog/burn-rate-calculation-startup-runway-calculator" target="blank" rel="noopener noreferrer">Pilot: Startup Burn Rate Calculator</a></li><li><a href="https://carta.com/learn/startups/metrics/burn-rate/" target="blank" rel="noopener noreferrer">Carta: What is a Burn Rate?</a></li><li><a href="https://pilot.com/blog/understanding-your-cash-flow" target="blank" rel="noopener noreferrer">Pilot: How to Read a Statement of Cash Flows</a></li><li><a href="https://pilot.com/blog/how-to-recession-proof-your-annual-budget" target="blank" rel="noopener noreferrer">Pilot: How to Recession Proof Your Annual Budget</a></li><li><a href="https://www.bvp.com/atlas/scaling-to-100-million" target="blank" rel="noopener noreferrer">Bessemer Venture Partners: Scaling to $100 Million</a></li><li><a href="https://sacks.substack.com/p/the-burn-multiple-51a7e43cb200" target="blank" rel="noopener noreferrer">David Sacks: The Burn Multiple</a></li><li><a href="https://www.svb.com/commercial-cards-insights/corporate-card/startup-financial-management-best-practices/" target="blank" rel="noopener noreferrer">Silicon Valley Bank: Startup financial management, 4 best practices</a></li><li><a href="https://www.linkedin.com/pulse/your-product-6-months-ahead-market-internal-reporting-maciejewski-39zge/" target="_blank" rel="noopener noreferrer">The Fluent Founder: Decision-ready reporting</a></li></ul><hr>
