Startup Runway & Burn Rate Calculator

Calculate startup cash runway in months, net monthly burn rate, zero cash date, default alive status, and SaaS ARR valuation multiples.

Cash & Burn Parameters

$
$
$
%
$
Estimated Cash Runway
∞Default Alive

Zero Cash Date: Default Alive (Profitable) (at current net burn)

Default Alive

Net Monthly Burn

-$30,000

Outflow per month

Gross OpEx

$45,000

Total spending

Current ARR

$180,000

MRR × 12

Dynamic Runway

∞

With 5% MoM growth

Estimated SaaS ARR Valuation Multiple Range

Annual Recurring Revenue (ARR Base)$180,000
Conservative Valuation (5x ARR Multiple)$900,000
High-Growth Valuation (12x ARR Multiple)$2,160,000
Indicative Valuation Range$900,000 – $2,160,000
Fundraising & Capital Planning Advisory

Strong Position: You have 18+ months of cash runway. Focus your resources on product-market fit and revenue acceleration before opening your next financing round.

Startup Financial Health & Runway Formulas
Net Monthly Burn
Net Burn = OpEx + Hires − MRR
Static Cash Runway
Runway (Mo) = Cash ÷ Net Burn
Annual Recurring Revenue
ARR = Monthly Revenue × 12
Step-by-Step Calculation Breakdown
Example: $600,000 Cash, $45,000 Monthly Expenses, $15,000 MRR, 5% MoM Growth
1. Current ARR: $15,000 MRR × 12 = $180,000 / year
2. Net Monthly Burn: $45,000 Expenses − $15,000 Revenue = $30,000 / month
3. Static Cash Runway: $600,000 ÷ $30,000 = 20.0 Months
4. 5% MoM Growth Extrapolation: Extends runway to ~25.2 dynamic months
5. Valuation Range (5x – 12x ARR): $900,000 – $2,160,000
Runway Status:20.0 Months (Comfortable Runway)

Why Founders Must Track Net Burn Over Gross Burn

Many founders mistakenly focus on gross burn (total money spent). However, as recurring revenue scales, your net burn is what truly dictates your survival timeline. Simulating a 5% to 10% monthly revenue growth rate can extend a 15-month static runway into a "Default Alive" scenario where the company reaches self-sustaining profitability without taking on additional investor dilution.

SaaS Valuation Multiples by Growth Profile (2026)

Growth Tier (YoY)Typical ARR MultipleRule of 40 TargetInvestor Sentiment
High Growth (>80% YoY)10x – 15x ARR50%+Top-tier VC term sheets, competitive bidding
Standard Growth (30%–60% YoY)6x – 9x ARR35%–45%Healthy Series A / B valuations with solid retention
Moderate Growth (<25% YoY)3x – 5x ARR<25%Focus on profitability and capital efficiency

Frequently Asked Questions

What is the difference between Gross Burn and Net Burn?
Gross Burn is the total cash spent each month on operating expenses (payroll, servers, marketing, office). Net Burn is your true net monthly cash outflow: Gross Operating Expenses minus Monthly Revenue.
What does 'Default Alive' mean?
Coined by Paul Graham (Y Combinator), 'Default Alive' means that based on your current revenue growth trajectory and expenses, your startup will reach profitability and positive cash flow before running out of money, without needing to raise more VC.
How many months of cash runway should a startup maintain?
Early-stage (Pre-Seed/Seed) companies should aim for 18 to 24 months of runway. Series A and B startups typically budget for 24+ months to leave 6 to 9 months for their subsequent fundraising cycle.
How do SaaS valuation multiples work?
SaaS startups are commonly valued as a multiple of Annual Recurring Revenue (ARR = MRR × 12). Base multiples range from 4x to 6x ARR for modest growth, and 10x to 15x+ ARR for hyper-growth companies exceeding the Rule of 40.
When should a startup begin fundraising for the next round?
Startups should actively kick off their fundraising process when they have 9 to 12 months of runway remaining to avoid negotiating from a position of distress.

Related Tools