How to Calculate Your Freelance Runway (And Why SaaS Tools Don't Do It)
Every freelancer knows the anxiety of checking their bank account. But here's the hard truth: your bank balance tells you how much money you have, not how long you'll survive.
That's where runway comes in. Runway is the number of months you can operate before your money runs out — assuming zero new income. SaaS tools like FreshBooks and QuickBooks track revenue, but they have no idea what your personal expenses are. Your rent, your groceries, your internet bill — those live outside their walled garden.
LockMargin is different. Because it's offline-first and privacy-first, it can safely compute your real runway using both business and personal data, without sending anything to a cloud server.
The Formula That Matters
The core calculation is brutally simple:
Runway = Current Balance รท Monthly Burn Rate
In LockMargin, the get_runway_with_personal function does exactly this. It takes your current balance (tracked automatically from invoices and expenses) and divides it by your monthly burn rate (which includes both business expenses and personal outflows you define once in Settings).
Runway Status Table
LockMargin color-codes your runway so you know at a glance whether you're in the green:
| Status | Runway | What It Means |
|---|---|---|
| ัั Green | 6+ months | Healthy runway. You have time to focus on growth, not survival. |
| ๐ก Yellow | 3โ6 months | Caution zone. Start prioritizing high-likelihood invoices and cutting discretionary spend. |
| ๐า Red | Less than 3 months | Critical. Activate your crisis plan — follow up on overdue invoices, pause non-essential projects. |
Why SaaS Tools Fail at This
Cloud-based invoicing tools are designed for business accounting, not freelancer survival. Here's what they miss:
- Personal expenses: Your SaaS tool doesn't know you spend $1,200/month on rent.
- Offline gaps: If you're on a plane or in a dead zone, you can't even open your dashboard.
- Data ownership: Your financial runway is your most sensitive data. Why store it on someone else's server?
- Subscription cost: You're paying $20โ$50/month for a tool that still can't calculate your real runway.
How LockMargin Does It Better
LockMargin's Reactive Recurring Engine updates your runway calculation automatically every time you open the app. No cron jobs, no cloud sync, no manual refresh.
You define your personal burn rate once — under Settings โ' Financial Profile — and the engine handles the rest. It factors in:
- โ All unpaid invoices (expected income)
- โ All outstanding expenses
- โ Your personal monthly burn rate
- โ Recurring invoice schedules
The result? A single number that tells you the truth about your financial health. No cloud. No noise. Just your data, your rules.
Stop renting your business infrastructure.
Download LockMargin free. Calculate your real runway in seconds — no internet required.
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