Most startup financial advice assumes you have a team, investors, and a CFO. If you're a solo founder bootstrapping with your own money, that advice is useless.
You don't need a 50-tab financial model built for Series A fundraising. You need to know three things: how much money is coming in, how fast you're spending it, and how long you can keep going.
That's MRR, burn rate, and runway. Here's how to track them without overthinking it.
What MRR Actually Means for Solo Founders
Monthly Recurring Revenue is the money you can count on every month. Subscriptions, retainers, or recurring digital product sales.
One-time sales don't count. If you sold a $49 template yesterday, that's revenue, not MRR. MRR is the number that tells you whether your business is real or a hobby.
The formula is simple: add up all your active monthly subscriptions and recurring payments. That's your MRR. If you're pre-revenue, your MRR is $0. That's a starting line, not a failure.
Burn Rate: How Fast You're Spending
Burn rate is your monthly spend to keep the business alive. For a solo founder, this is usually small compared to a funded startup, but it still compounds.
Common solo founder expenses:
- Domain and hosting: $10-50/month
- Software tools: $20-100/month
- Platform fees (Gumroad takes 10%, Stripe takes 2.9%)
- Any paid promotion
Add it all up. If you're spending $50/month and making $0, that's $600/year gone with nothing to show.
Runway: Your Survival Clock
Runway equals cash in the bank divided by monthly burn rate.
$1,000 cash with $50/month burn = 20 months of runway. Sounds comfortable until you realize most people quit from frustration before they run out of money.
Track runway so you know exactly how much time you have to make this work. It changes every decision you make.
The Spreadsheet That Actually Helps
I built a 6-tab Google Sheets template for solo founders tracking their first $500 in MRR:
- Monthly P&L at a glance
- MRR tracker with month-over-month growth
- Burn rate calculator
- Runway projection
- Unit economics (CAC vs LTV)
- One-page dashboard
No investor jargon. No cells you'll never use. Just the numbers you need.
Get it here: shop.solobillions.com/l/financial-model
The One Number That Matters
If you only track one thing, track MRR. It tells you whether you have a business or a hobby. Set a target, track it weekly, and be honest about whether you're moving toward it.
The spreadsheet helps. But the real change comes from looking at your numbers every week instead of avoiding them.
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