Burn Rate for Small Business: What It Is, How to Calculate It, and Why It Matters

If you’re running a small business, especially in the trades or service space, your burn rate is one of the most important numbers you’re probably not tracking properly.

And if you don’t know your burn rate, you don’t know:

• How long your business can survive
• When you need to push sales
• How aggressive you can be with growth

Let’s fix that.

What Is Burn Rate?

Burn rate is simple:

How much money your business loses (or spends) each month.

It tells you how fast you’re “burning” cash.

There are two ways to look at it:

• Gross Burn Rate → Total monthly expenses
• Net Burn Rate → Expenses minus revenue

The Simple Formula

At TradeBrain, we keep this practical.

Net Burn Rate = Monthly Expenses – Monthly Revenue

Example:

• Monthly expenses: $40,000
• Monthly revenue: $30,000

Burn Rate = $10,000/month

You’re losing $10k every month.

Why This Actually Matters

This isn’t just a finance metric. It’s an operations decision-making tool.

Your burn rate answers:

• “How much runway do I have?”
• “Can I afford this?”
• “Do I need to sell right now?”

Step 1: Know Your Monthly Expenses

Start here. Most business owners underestimate this.

Include:

• Payroll (including yourself)
• Subcontractors
• Rent / shop / storage
• Software (CRM, tools)
• Vehicles, fuel, insurance
• Marketing spend
• Debt payments

Be honest. This is where most people mess up.

Step 2: Know Your Real Revenue

Use actual collected revenue, not invoices sent.

If you sent $50k in invoices but only collected $35k:

• Your business runs on $35k
• Not $50k

Step 3: Calculate Runway

Now we layer in the most important piece.

Runway = Cash in Bank ÷ Burn Rate

Example:

• Cash: $30,000
• Burn rate: $10,000/month

You have 3 months of runway.

That means if nothing changes, you’re out of cash in 3 months.

Step 4: Turn Burn Rate Into Action

This is where most people stop. We don’t.

If Burn Rate Is High:

• Cut non-essential expenses
• Pause new spending
• Review pricing
• Push sales immediately

If Burn Rate Is Low or Positive:

• Invest in growth
• Increase marketing
• Improve systems
• Build cash reserves

The Real Problem

Most business owners don’t track burn rate because it forces hard decisions.

But the real issue is this:

Things don’t get done because they aren’t clearly defined.

If your numbers are vague:

• You delay decisions
• You guess instead of act
• You stay reactive

How We Use This at TradeBrain

We don’t just calculate burn rate once.

We track it:

• Monthly (minimum)
• Weekly when needed
• Alongside key KPIs (revenue, profit, jobs, output)

Then we connect it to:

• Sales targets
• Marketing spend
• Daily execution

Final Thought

Burn rate isn’t just about survival.

It’s about control.

When you know your numbers:

• You stop guessing
• You move faster
• You make better decisions

And most importantly—you stay in the driver’s seat.

Quick Checklist

1. List all monthly expenses
2. Confirm collected revenue
3. Calculate burn rate
4. Calculate runway
5. Decide your next action