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Startup Basics: How to Calculate Runway

Startup Basics: How to Calculate Runway

August 7, 2024
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9
minute read
Kordis Staff Writer
Startup Basics: How to Calculate Runway

Calculating the runway for a startup is a straightforward but essential task for financial survival. 

So, how do you calculate runway for a startup? 

This critical metric is determined by dividing your cash on hand by the monthly burn rate, giving you a timeline within which your startup must either achieve profitability or secure additional funding. Our guide will lead you through the process step by step, ensuring you gain a comprehensive understanding without overwhelming you with complexity.

Understanding Startup Runway

Illustration of a startup runway

The startup runway indicates its financial stability and endurance. Profoundly, it guides the financial planning within a startup, outlining funding requirements and investment landmarks to attract potential investors.

Early stage startup companies find this particularly beneficial as it aids in determining their operational lifespan before achieving profitability or reaching the next funding milestone.

What is Startup Runway?

In the startup context, ‘runway’ refers to the duration a startup can sustain operations before its cash reserves are exhausted. It serves as a gauge of a company’s financial lifespan, calculated by its cash burn rate.

Grasping this concept enables startups to assess the time left to reach profitability and keeps stakeholders informed about the timing of financial needs. You can calculate your startup’s runway by:

  1. Dividing the current cash balance by the monthly burn rate
  2. This reveals the number of months your business can run before running out of funds
  3. The cash balance, representing the total funds available to your startup, plays a pivotal role in determining its financial runway.

Why is Runway Important?

Comprehending the runway concept and understanding how much runway is needed assists startups in devising a sustainable growth strategy. Founders typically aim for a runway of 18-21 months, which syncs with the average interval between fundraising efforts. This understanding fosters necessary adjustments in plans or the timing to pursue venture capital, becoming instrumental in managing cash reserves and making judicious spending decisions to avert financial crisis and business closure.

The precarious ‘red zone’ for a startup’s runway commences at three months, indicating an immediate need for funding. Tactically extending the runway grants more control over the business and paves the way for raising capital under favorable circumstances. Essentially, a solid understanding of your runway is a crucial weapon in your financial management repertoire.

Calculating Your Startup's Runway: A Step-by-Step Guide

Now that we’ve covered the ‘what’ and ‘why’ of startup runway, let’s delve into the ‘how.’

To calculate your startup’s runway, three critical steps are needed: 

  • determining your burn rate, 
  • traditional cash runway calculation, and 
  • historical and predicted cash runway calculations. 

Let’s break down each step.

Determining Burn Rate

To navigate your startup’s financial journey, you first need to know your burn rate. Burn rate is the rate at which a startup is spending money. This includes everything from:

  • salaries
  • rent
  • marketing expenses
  • that coffee machine in the break room

There are two types of burn rates: gross and net. 

The gross burn rate measures the cash a company uses for expenses every month, without considering any incoming cash flow. It is an important metric to track the financial health of a business. 

The net burn rate, on the other hand, offers a comprehensive view of a startup’s financial health by factoring in income and monthly financial loss, which is calculated by subtracting operating expenses from revenue. Think of it as the net result of your monthly financial activities.

Traditional Cash Runway Calculation

Once you have your burn rate, you can proceed to the traditional cash runway calculation using the cash runway formula. To calculate your burn rate, use the following formula: 

Runway = Cash balance / Monthly burn rate. 

This calculation indicates the number of months your startup can function before depleting its funds.

For instance, suppose a startup has a cash balance of $500,000 and a monthly burn rate of $25,000. Dividing the cash balance by the burn rate yields a runway of 20 months. 

This computation offers a glimpse of your startup’s financial status and its operational sustainability period before requiring additional funding or reaching profitability. Analyzing the cash flow statement can provide further insights into the company’s financial health, including how much cash is available for future investments or expenses.

Historical and Predicted Cash Runway Calculations

A savvy startup founder doesn’t just look at the present but also learns from the past and anticipates the future. That’s where historical and predicted cash runway calculations come into play. These calculations consider past performance and future projections, respectively, to estimate a startup’s runway.

Historical cash runway calculations require monitoring previous financial activities, wherein average net burn can be computed using historical data to understand past cash flow trends. 

Predicted cash runway, on the other hand, is calculated using all projected revenues and costs, and factoring in a buffer for unexpected changes in revenue and costs. 

These calculations provide a dynamic view of your startup’s financial timeline and help you navigate through economic uncertainties.

Factors Influencing Your Startup's Runway

A startup’s runway isn’t a static figure but a dynamic measure affected by various factors. Grasping these elements can enhance your ability to steer your startup’s financial health. Notable influencers include operating costs, revenue and profitability, and funding stages.

Let’s examine each of these aspects in detail.

Operating Costs

Operating costs are the expenses a startup incurs to keep the business running. These costs include:

  • Salaries
  • Rent
  • Utilities
  • Other expenses

These costs directly impact a startup’s runway by influencing the burn rate.

For example, if your startup has high rent or salary costs, your burn rate will be elevated, shortening your runway. Conversely, if you can manage to keep these costs low, perhaps by using a co-working space or hiring part-time staff, you can lower your burn rate and extend your runway. A detailed and realistic assessment of operating costs is crucial in calculating an accurate runway and planning for sustainable business operations.

Revenue and Profitability

Just as a car’s fuel efficiency affects how far it can travel on a tank of gas, a startup’s revenue and profitability directly influence its runway. Revenue can directly reduce a startup’s burn rate, effectively extending its financial runway when calculated properly.

Focusing on the profitability of channels and customers is essential, avoiding low-value deals to ensure the extension of a startup’s runway. Additionally, reducing customer acquisition costs and enhancing high-margin revenue streams are strategic measures to prolong a startup’s runway. 

Incorrect pricing strategies, such as underpricing or not adequately measuring pricing outcomes, can severely minimize profit margins and hence affect runway length.

Funding Stages

A startup’s funding stages significantly impact its runway. During the seed funding stage, startups typically receive between $50,000 to $2 million from angel investors, friends, or family members. This funding can provide the initial runway for the startup to take off.

As the startup evolves, it may enter Series A and Series B funding stages, where it can gain substantial investment to grow and expand the business. With larger investments involved at each successive funding stage, startups need to plan their runway to ensure it aligns with the scale of funding and time needed to reach profitability or the next funding milestone.

Strategies for Extending Your Startup's Runway

Startup founders can implement various tactics to prolong their runway. These strategies involve reducing non-essential expenses, increasing sales and revenue, and scouting for alternative funding sources.

Let’s delve deeper into these strategies.

Cutting Non-Essential Expenses

Cutting non-essential expenses is one of the most direct ways to extend your startup’s runway. This can help in managing your finances more effectively and buying more time for the business to grow. This strategy can lower your burn rate and prolong your runway. However, identifying what is ‘non-essential’ can be challenging.

Entrepreneurs often incur costs on items that do not contribute to the startup’s growth, like expensive pitch deck designs. Reevaluating these expenses can free up cash that can be redirected to more critical areas of the business, such as product development or marketing.

Overextending on expenses, such as hiring too many employees too quickly, can significantly deplete a startup’s cash reserves, threatening its financial stability.

Boosting Sales and Revenue

Boosting sales and revenue can directly combat a high burn rate, thereby prolonging a startup’s runway. Achieving product-market fit is a crucial step in this strategy, as it can help startups generate more revenue and improve operational efficiency.

Building and maintaining long-term customer relationships is more beneficial for business growth and cash flow than solely focusing on short-term profits. Startups can also look at enhancing high-margin revenue streams and reducing customer acquisition costs as ways to increase revenues and extend their runway.

Alternative Funding Sources

While cutting costs and boosting revenue are effective strategies, they may not always be enough. This is where alternative funding sources can come into play. Raising additional funding from investors through equity financing can help to extend a startup’s runway by boosting its cash reserves.

Debt financing is another option for startups to acquire capital for growth without diluting existing ownership stakes. However, it’s important to remember that the process of fundraising can span several months, impacting the financial planning related to a startup’s cash runway. Therefore, it’s crucial to start planning for the next fundraising round well in advance.

Common Mistakes to Avoid in Runway Management

While comprehending your startup’s runway is vital, it’s equally critical to avoid common pitfalls in managing a runway. 

One such error is failing to differentiate between cash flow and profit; a company can be profitable with negative cash flow or have positive cash flow with minimal profit.

Another frequent error is inadequately focusing on fundraising through steady efforts, preferring smaller rounds that may prove insufficient in harsh economic climates. 

Inefficient management of accounts receivable, like postponed payment collection, can lead to cash flow difficulties, underscoring the need for a clear payment policy and diligent follow-up. Monitoring your company’s cash position can help prevent such issues.

Moreover, startups often overlook the importance of seeking financial advice, which can lead to improved cash management and fundraising strategies.

Key Metrics to Monitor for a Healthy Runway

Monitoring key metrics can give you a clear picture of your startup’s financial health, helping you manage your runway effectively. Some of these metrics include:

  • Customer Acquisition Cost (CAC)
  • Monthly Recurring Revenue (MRR)
  • Lifetime Value to Customer Acquisition Cost (LTV:CAC) ratio
  • Burn Rate
  • Burn Multiple

Each of these metrics tells a different story about your startup’s financial health and sustainability. 

For instance, CAC helps you understand how much it costs to acquire a new customer. A high CAC could mean that your marketing efforts are inefficient, which could impact your burn rate and shorten your startup’s runway.

On the other hand, a high MRR indicates a steady stream of revenue, which can extend your runway. 

By monitoring these metrics closely, you can make informed decisions that will help you manage and extend your startup runway.

Summary

We’ve journeyed through the intricacies of understanding, calculating, and managing a startup’s runway. From defining what a startup runway is to exploring strategies for extending it, we’ve covered a lot of ground. The importance of accurately calculating and managing your startup’s runway cannot be overstated—it’s a vital tool that can guide your startup’s growth and sustainability. Remember, a well-managed runway can be the difference between your startup’s success and failure. So, keep your eyes on the runway, and steer your startup towards a successful takeoff.