Most solo founders have a rough idea of their costs. “Hosting is $20, tools are like $50, and I run some ads.” That’s not knowing your costs. That’s guessing at a fraction of them.
Real costs include things you’re not counting: your time, payment processing fees, tax obligations, one-time setup expenses, the tools you forgot you subscribed to, the domain you renewed automatically, the contractor you paid for a logo, the conference ticket you bought for “networking.”
Until you’ve recorded every dollar flowing out, you cannot know whether your business is profitable — or how far it is from profitability. Let’s get honest about the numbers.
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## The Complete Cost Picture
Your total costs fall into several categories. Most founders only count the first one or two.
**Building costs (one-time and ongoing):** Everything it costs to create and maintain the product. Development tools, design software, code signing certificates, initial hosting setup, premium libraries or APIs.
**Infrastructure costs (recurring):** Hosting, CDN, database, email delivery service, domain renewal, SSL (usually free but not always), monitoring services, backup storage.
**Tool costs (recurring):** Analytics, CRM, email marketing, project management, design tools, customer support platform, accounting software. These accumulate silently — $10 here, $15 there — until they’re $200/month.
**Customer acquisition costs:** Ad spend, content creation (if outsourced), sponsorships, listing fees for marketplaces, the time you spend on marketing.
**Customer servicing costs:** Time spent on support, documentation creation, bug fixes triggered by customer reports. Every support email costs you 15-30 minutes of focused time.
**Transaction costs:** Payment processor fees (typically 2.9% + $0.30 per transaction for Stripe), marketplace commissions if you sell through an app store (15-30%), currency conversion fees for international customers.
**Tax costs:** Income tax, self-employment tax, VAT/GST if applicable, potential sales tax in certain jurisdictions. Plan for 25-35% of profit going to taxes. If you’re surprised by your tax bill, you didn’t plan well enough.
**Your time:** The big one. Every hour you spend on the business is an hour you’re not earning at your market rate. Even if you don’t pay yourself, your time has a cost. Calculate it honestly.
**One-time costs:** Business registration, legal setup, initial branding/logo, lawyer consultation, first batch of ads to test messaging. These happen upfront and need to be factored into your runway.
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## The Real Math on Common Solo SaaS Costs
Let’s make this concrete with a typical solo SaaS scenario:
| Category | Monthly Cost |
|———-|————-|
| Hosting (Vercel/Railway) | $20 |
| Database (Supabase/PlanetScale) | $25 |
| Email service (Resend/Postmark) | $15 |
| Analytics (PostHog free → paid) | $0-50 |
| Domain + DNS | $3 (annualized) |
| Payment processing (Stripe at $2K revenue) | $60 |
| Email marketing (ConvertKit/Loops) | $30 |
| Design tools (Figma free) | $0 |
| Accounting (Wave free → Xero) | $0-15 |
| Misc subscriptions | $30 |
| Ad spend (testing) | $200 |
| **Subtotal (tools + infra)** | **$383-448** |
| Your time (15 hrs/week × $50) | $3,000 |
| **Total real cost** | **$3,383-3,448** |
To break even with $25/month customers (after Stripe fees, so ~$23.50 net per customer):
$$\frac{\$3,400}{\$23.50} \approx 145 \text{ customers}$$
That’s 145 paying customers just to cover costs including your time. Without counting your time? About 19 customers. See how dramatically different those numbers are?
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## Recording Everything (The Discipline Nobody Wants)
The habit that separates financially healthy founders from financially clueless ones is **recording every expense when it happens.**
Not at the end of the month. Not at tax time. When it happens.
Options from simplest to most sophisticated:
– **Spreadsheet:** A Google Sheet with columns for date, description, category, and amount. Add a row every time you spend money. Takes 30 seconds each time.
– **Accounting app:** Wave (free), Xero, or QuickBooks. Connect your business bank account and credit card for automatic import.
– **Receipt capture:** Photograph every receipt. Use an app like Dext or just a dedicated folder in Google Drive. Your future self will thank you at tax time.
The key rule: **separate business and personal finances entirely.** Get a business bank account (or at minimum, a dedicated personal account used only for business). This makes tracking trivial, tax filing clean, and protects you legally if your business is structured as an LLC or corporation.
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## Planning for Upfront Cash Needs
Many solo products require upfront investment before a single dollar of revenue arrives. Account for this.
**Typical pre-revenue expenses:**
– 2-3 months of infrastructure costs while building ($100-300)
– Business registration ($50-500 depending on jurisdiction)
– Domain and branding ($50-200)
– Legal templates for privacy policy, ToS ($50-200)
– Initial ad testing budget ($200-500)
– Tools and subscriptions during development ($100-300)
**Total pre-revenue runway needed:** $500-2,000+ for a lean solo SaaS.
This isn’t a lot compared to funded startups, but it’s real money from your savings. Know the number before you start, set it aside, and track it separately from ongoing operational costs.
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## 🔨 Your Action Item: Create Your Complete Cost Ledger
1. **Open a spreadsheet.** Create columns: Category, Item, Monthly Cost, Annual Cost, Notes.
2. **Go through every category above.** List every current expense. Check your bank statements, credit card transactions, and email receipts for subscriptions you forgot about.
3. **Add your time.** Estimate hours per week × your hourly rate.
4. **Calculate the total.** Monthly and annual.
5. **Compare to your revenue (or projected revenue).** Are you profitable? When will you be? How many customers do you need?
6. **Identify your top 3 costs.** For each, ask: “Can I reduce this without hurting the business?” Often, one downgrade or cancellation saves $50-100/month.
7. **Set up a system** to record expenses as they happen — even if it’s just bookmarking a spreadsheet on your browser toolbar.
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**CTA Tip:** Record every expense starting today. Not tomorrow. Today. The most dangerous costs are the invisible ones — subscriptions you forgot, fees you didn’t notice, time you didn’t value. Calculate your total costs, compare them to revenue, and know exactly how many customers stand between you and profitability. Then plan for the upfront cash you’ll need before the first dollar arrives. Financial clarity isn’t glamorous, but it’s the difference between a business that survives and one that silently bleeds to death.
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*Next up: The money math is clear. But what about the emotional math? Let’s talk about the grind — the valleys, the plateaus, and why the hardest months often precede the breakthroughs.*
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