#746 · Startup Tool

SaaS Expense Calculator

Analyze SaaS monthly expenses, annual cost, burn rate, and cash runway from hosting, payroll, marketing, support, software, and other operating costs.

Calculator

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How to use this calculator

  • Enter each major monthly operating expense category.
  • Add current cash balance to calculate runway.
  • Review the burn rate and expense mix before hiring or increasing acquisition spend.

What the result means

The result shows how much cash the SaaS business consumes each month and how many months of runway remain. A longer runway gives more time to improve growth or fundraising terms.

Total Monthly Expense = Sum of all costs. Runway = Cash Balance / Monthly Burn.

Runway assumes expenses stay constant. Hiring, paid acquisition, and infrastructure growth can shorten runway quickly.

Example calculation

If monthly expenses total $50,000 and cash balance is $300,000, estimated runway is 6 months.

Tips for better results

  • Separate fixed payroll from variable hosting and support costs.
  • Review marketing spend by payback period, not just budget size.
  • Keep enough runway for product iteration and sales cycle delays.

FAQ

How many months of runway should a SaaS startup have?

Many startups prefer at least 12 to 18 months of runway, but the right target depends on burn rate, growth, and fundraising conditions.

What is a healthy SaaS burn rate?

A healthy burn rate depends on stage and growth efficiency. Burn should be justified by measurable revenue growth or strategic milestones.

How much should SaaS companies spend on marketing?

Marketing spend should be tied to CAC payback and LTV. Spending more is risky if payback is slow or churn is high.

How do I reduce SaaS operating costs?

Focus on payroll efficiency, cloud optimization, tool consolidation, support automation, and low-performing paid acquisition channels.

What percentage of revenue should go to payroll?

Payroll is often the largest SaaS expense. The right percentage depends on stage, team structure, revenue, and growth model.

SaaS Expense Metrics

MetricMeaning
Monthly BurnTotal monthly operating expense
Annual ExpenseMonthly expense multiplied by 12
RunwayCash balance divided by burn
Cost EfficiencyHealth score based on runway and cost level

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