What should I do if my small business runway drops below 2 months?

Immediately pause discretionary capital expenditures, contact your top clients to expedite receivables, negotiate vendor term extensions, and tap credit lines.

Main Street & SMB•Recommended Target: 3–6 months

Small Business Runway Calculator

For small business owners, operating reserves are your financial oxygen mask. Whether facing economic downturns, seasonal slow months, or delayed client invoices, knowing your exact runway lets you make proactive decisions instead of reacting in panic.

Industry Benchmark Guidance (3–6 months):Most commercial lenders and financial advisors recommend small businesses maintain 3 to 6 months of operating expenses in liquid cash reserves. This buffer cushions against supply chain shocks, key employee departures, or emergency equipment replacement.

Hồ sơ ngành mẫuClick to test scenario

Số dư tiền mặt hiện tại ($)Liquid reserves

Doanh thu tiền mặt hàng tháng ($)

Tổng chi phí hoạt động hàng tháng ($)Gross Burn

Monthly Revenue Growth

Monthly Expense Growth

One-Time Upcoming Expense

Occurs in Month

Additional Funding Cushion

Arrives in Month

Thời gian Runway ước tính

Dự báo Runway

12.8 months

Healthy: You have 12.8 months of runway (October 2027).

Ngày dự kiến cạn kiệt tiền mặt:October 2027

Tốc độ đốt tiền ròng hàng tháng (Net Burn):8.000 US$/mo

Tốc độ đốt tiền ròng hàng tháng (Net Burn)

8.000 US$

Expenses − Revenue

Tốc độ đốt tiền gộp hàng tháng (Gross Burn)

36.000 US$

Total monthly outlays

Số dư tiền mặt hiện tại ($)

85.000 US$

Liquid reserves balance

Điểm hòa vốn (Break-Even)

Monthly sales required to eliminate cash burn entirely: 36.000 US$/month

Khoảng cách doanh thu cần đạt để hòa vốn: +8.000 US$/mo

Projected Cash Remaining

Based on trajectory

After 3 Months61.608 US$

After 6 Months40.155 US$

After 12 Months3.968 US$

Quỹ đạo số dư tiền mặt trong 24 tháng

Biểu đồ sụt giảm tiền mặt hàng tháng có tính đến các yếu tố tăng trưởng.

Số dư tiền mặt

Zero Cash Threshold

Hover or tap any month marker to inspect exact projected cash balance, revenue, and burn for that period.

Lập kế hoạch kịch bản giả định (What-If)

Xem việc cắt giảm chi phí, tăng trưởng bán hàng hoặc vốn vay bắc cầu giúp kéo dài tuổi thọ công ty như thế nào.

Reduce expenses by 5%Sustainable

Save $1,800/mo (new expenses: $34,200/mo)

Runway:

12.8 moSustainable / Infinite

Reduce expenses by 10%Sustainable

Save $3,600/mo (new expenses: $32,400/mo)

Runway:

12.8 moSustainable / Infinite

Reduce expenses by 20%Sustainable

Save $7,200/mo (new expenses: $28,800/mo)

Runway:

12.8 moSustainable / Infinite

Financial Calculation Methodology & Transparency

How the Runway Calculator Works: Mathematical Model & Assumptions

1. Static Cash Runway Formula

For businesses with steady revenue and predictable overhead, runway is determined by dividing liquid cash reserves by net monthly cash deficit:

Runway (months) = Available Cash ÷ Net Monthly Burn

2. Gross Burn vs. Net Burn

Gross Burn: Total cash disbursed each month (payroll, contractors, hosting, rent, utilities).
Net Burn: Gross monthly expenses minus total monthly cash revenue collections.
Break-Even: When Net Burn $\le$ $0$, cash runway is mathematically sustainable or infinite.

3. Dynamic Growth Projections & Interpolation

When revenue growth or expense inflation rates are enabled, the engine calculates month-by-month compound flows up to 60 months:

Ending Cash(m) = Beginning Cash(m) + Revenue(m) - Expenses(m)

Fractional Month = Beginning Cash(depletion) ÷ Monthly Net Burn

We linearly interpolate the exact day/fraction when cash reaches $0, avoiding arbitrary rounded whole months.

4. Client-Side Privacy Guarantee

Every financial computation executes exclusively inside your local browser runtime. No financial balances, revenue figures, or payroll numbers are sent to any remote server or database.

Primary Cost Drivers

Major Burn Drivers for Small Businesses

Commercial Lease & Facilities

Fixed brick-and-mortar rent, property utilities, maintenance contracts, and local municipal fees.

Core Staff Payroll & Overtime

W-2 hourly and salaried personnel, employer insurance contributions, and state unemployment taxes.

Inventory Replenishment & Vendor Terms

Wholesale purchases required ahead of peak sales cycles that temporarily lock up liquid bank balances.

Actionable Levers

How to Extend Small Businesses Runway

Negotiate Flexible Supplier Payment Terms

Request Net-60 or Net-90 terms from reliable vendors to keep cash in your account longer.

Accelerate Accounts Receivable Collections

Send automated invoice reminders, impose late payment fees, or offer a 2% discount for 10-day payment (2/10 Net 30).

Establish a Pre-Emptive Business Line of Credit

Apply for a revolving credit line while your financial ratios are strong, securing standby liquidity before you need it.

Worked Calculation: Local Commercial HVAC Contractor

Starting Cash$85,000

Monthly Cash Inflow$28,000

Monthly Cash Outflow$36,000

With $85,000 in bank deposits, $28,000 average off-season revenue, and $36,000 monthly overhead, the business experiences a net monthly deficit of $8,000. Runway is 10.6 months ($85,000 ÷ $8,000), confirming ample liquidity to comfortably bridge until peak seasonal summer demand.

Frequently Asked Questions: Small Businesses Runway

Common questions and financial benchmarks for small businesses.

A minimum of 3 months of basic operating expenses (payroll, rent, utilities, minimum debt service) is the baseline safety net. High-volatility businesses should target 6 months.