Ad spend burn-rate & runway dashboard
How long can the business survive at current burn? Enter your numbers — they're saved to your browser automatically.
Ad spend burn-rate & runway dashboard
Runway dashboard
Current runway
—
days
Runway scenarios (if you cut ad spend)
Reading your runway
Green (6+ months) means you have room to experiment and grow ad spend. Amber (3–6 months) means you should be actively monitoring ROAS and planning your next cash injection — whether that's profitability, fundraising, or an asset sale. Red (under 3 months) means ad spend decisions are urgent: only keep spending on channels where ROAS is clearly positive and consider cutting everything else while you stabilise.
The zero-revenue scenario is a stress test. Realistic downside scenarios are usually "revenue drops 30–50%" rather than "drops to zero." Use the scenario table to see how cuts to ad spend would extend your runway in those cases.
About this tool
Enter your current bank balance, daily fixed costs, daily ad spend, and current monthly revenue. The dashboard shows your net daily burn, total runway in days, the date your cash runs out at current burn, and runway projections at 25%, 50%, and 75% ad spend cuts. All inputs are saved to your browser automatically — refresh the page and your numbers are still there.
Frequently asked questions
What does "zero-revenue runway" mean?
Zero-revenue runway is the most conservative scenario: how long your cash lasts if all revenue stops today and you keep spending at the current rate. It's a useful stress-test — not a prediction. Lenders, investors, and acquisition buyers sometimes look at this metric to assess how dependent the business is on continuous revenue generation. A zero-revenue runway under 90 days is a serious risk flag.
When should I cut ad spend?
Ad spend should be cut when ROAS (return on ad spend) drops below your break-even point, when cash runway falls below 3–6 months, or when you need to preserve cash ahead of a known cost spike (hiring, inventory, a product launch). The scenarios on this dashboard show the mechanical effect of cuts on runway — but the right decision also depends on whether your ads are actually generating positive ROAS. A dollar of ad spend returning $1.20 in margin should be kept even in a downturn; spend returning $0.80 in margin should be cut immediately.
What should I include in "daily fixed overhead"?
Fixed overhead is everything you spend each day regardless of whether you run ads: salaries, SaaS subscriptions, hosting, insurance, rent, accountant fees. Divide your monthly total by 30.4 to get a daily figure. Leave out ad spend — that's the separate input. If some costs are annual (like domain renewals or annual software licences), divide by 365 and add them to your daily total.
Why does the dashboard save to my browser?
The burn-rate dashboard is designed to be revisited regularly — it's a planning tool, not a one-off calculator. Storing your inputs locally means you can bookmark this page and open it each week to update the numbers without re-entering everything. Nothing leaves your browser; the data is stored in localStorage under the key "ventri_adspend".
How do I calculate break-even ad spend?
Break-even ad spend is the daily ad budget at which your revenue exactly covers your total costs. The dashboard calculates this for you: it's the point where (daily revenue) = (daily fixed overhead) + (daily ad spend). If your revenue is less than your fixed overhead alone, there's no ad spend level that breaks even — you need to either grow revenue or cut fixed costs.