What Runway Means
Runway is the number of months your business can continue operating given your current cash on hand and your current monthly burn rate. It is expressed as a single number: “we have 6 months of runway.”
The formula:
Runway (months) = Cash on hand divided by monthly net burn
Where monthly net burn = monthly expenses minus monthly revenue.
Example: You have $30,000 in your business account. Your expenses are $8,000/month. Your revenue is $2,000/month. Net burn is $6,000/month. Runway = 30,000 divided by 6,000 = 5 months.
Why Runway Matters for Loan Applications
Lenders use your runway calculation — even if they do not call it that — to assess how likely you are to repay. A business with 18 months of runway has time to build revenue and service debt. A business with 3 months of runway is in survival mode; most lenders see this as a high default risk.
More importantly for founders: applying for a loan when you have 1–2 months of runway is almost always the wrong time. By that point, your desperation is visible in the application, your revenue trend is declining, and the lender’s terms will reflect the elevated risk (higher APR, shorter term, smaller amount). The correct time to apply for a business loan is when you have 6+ months of runway and the loan will accelerate growth, not prevent collapse.
Runway and Loan Type Matching
| Runway | Recommended loan approach |
|---|---|
| 12+ months | Apply for SBA Microloan or traditional LOC — you can wait 4–8 weeks |
| 6–12 months | Apply for Fundbox or an online LOC — need faster process |
| 3–6 months | Emergency: Kiva for small amounts, personal loan at 14–22% APR, or investor bridge |
| Under 3 months | Loan is likely not the right solution — the approval timeline may outlast your runway |
Improving Your Runway Before Applying
Every month you extend your runway before applying for a loan improves your loan terms. Tactics:
- Cut non-essential expenses (every $1,000/month in expense reduction extends runway by half a month at $6K burn)
- Prepay customers for annual subscriptions (front-loads cash)
- Defer founder salary if other funding sources exist
- Collect outstanding receivables aggressively
The Hard Truth About Runway and Startup Loans
Most startup loan products — including the SBA Microloan, Fundbox, and Lendio’s network — will not fund a business with under 3 months of runway without significant collateral. The funding timeline (4–8 weeks for SBA, next day for Fundbox) combined with the approval probability means you should start the process with at least 4–6 months of runway remaining.
Related Terms
- Bootstrapping — building without external capital
- MRR — the monthly revenue figure that extends runway
- Collateral — assets that can back a loan when runway is low