5 Businesses Under $100 With Real P&L Numbers

Five Businesses, Under $100, Real Numbers

Theory is cheap. Let's look at five businesses you can actually start this week for under $100, with real startup costs, monthly operating expenses, revenue projections, and profit margins. No hypotheticals — these are models people are running right now.

Business #1: Social Media Management Agency — $20 Startup

What it is: You manage social media accounts for small businesses — creating content, scheduling posts, engaging with followers, and reporting results.

Startup cost: Domain name: $12. Portfolio site (Carrd free tier): $0. Tools (free tiers of Canva, Buffer, Google Workspace): $0. Total: $12-$20.

Month 1: Revenue: $0-$500 (first client). Expenses: $20. Net: -$20 to +$480.

Month 6: Revenue: $2,000-$3,500 (4-7 clients at $500/month). Expenses: $80 (upgraded tools). Net: $1,920-$3,420.

Month 12: Revenue: $4,000-$8,000 (8-12 clients, some at higher tiers). Expenses: $500 (tools + 1 contractor). Net: $3,500-$7,500.

The $20 Agency program provides the exact system for launching this model, including client acquisition scripts, deliverable templates, and pricing frameworks.

Business #2: Thrift Store Resale Operation — $75 Startup

What it is: You source undervalued items from thrift stores, estate sales, and garage sales, then resell online for profit.

Startup cost: Initial inventory sourcing: $50-$75. eBay store subscription: $0 (first 250 listings free). Shipping supplies: $10. Total: $60-$85.

Month 1: Revenue: $200-$600 (learning the ropes). Expenses: $85 (inventory + supplies). Net: $115-$515.

Month 6: Revenue: $1,000-$2,500. Expenses: $350 (inventory + fees + supplies). Net: $650-$2,150.

Month 12: Revenue: $2,000-$5,000. Expenses: $800 (more inventory, premium eBay store, storage). Net: $1,200-$4,200.

For sourcing strategies and category-specific margin data, The Resale Trap is the go-to resource for resellers.

Business #3: Freelance Content Writing — $12 Startup

What it is: You write blog posts, website copy, email newsletters, and marketing content for businesses.

Startup cost: Domain + hosting: $12 (or free WordPress.com site). Writing tools: $0 (Google Docs, free Grammarly). Total: $0-$12.

Month 1: Revenue: $300-$750 (2-5 articles at $150 each). Expenses: $12. Net: $288-$738.

Month 6: Revenue: $2,000-$4,000 (recurring clients + one-off projects). Expenses: $50 (Grammarly Pro, hosting). Net: $1,950-$3,950.

Month 12: Revenue: $4,000-$8,000 (higher rates + more clients). Expenses: $100 (tools + subscriptions). Net: $3,900-$7,900.

Freelance writing has arguably the highest margin of any micro business. Your inventory is your brain, and it never runs out.

Business #4: Local Service Business (Cleaning/Lawn Care) — $50 Startup

What it is: You provide cleaning, lawn mowing, pressure washing, or similar services to residential customers in your area.

Startup cost: Cleaning supplies (if you don't already own them): $30-$50. Flyers/door hangers: $20 (Vistaprint). Nextdoor/Facebook posting: $0. Total: $30-$50.

Month 1: Revenue: $400-$1,200 (2-6 recurring clients at $100-$200/visit). Expenses: $50. Net: $350-$1,150.

Month 6: Revenue: $2,000-$5,000 (8-20 recurring clients). Expenses: $200 (supplies, gas, insurance). Net: $1,800-$4,800.

Month 12: Revenue: $4,000-$10,000 (scaling with helpers). Expenses: $1,500 (supplies, insurance, 1-2 helpers). Net: $2,500-$8,500.

Local services scale by adding helpers and routes. The owner transitions from doing the work to managing the system.

Business #5: Digital Product Business — $30 Startup

What it is: You create and sell digital products — templates, spreadsheets, planners, guides, presets, or mini-courses.

Startup cost: Gumroad or Payhip account: $0 (they take a % of sales). Canva for product creation: $0 (free tier). Domain: $12. Email tool (free MailerLite): $0. Total: $0-$30.

Month 1: Revenue: $0-$200 (building audience, launching first product). Expenses: $12. Net: -$12 to +$188.

Month 6: Revenue: $500-$2,000 (3-5 products, growing audience). Expenses: $30 (upgraded tools). Net: $470-$1,970.

Month 12: Revenue: $1,500-$6,000 (product suite, email list, organic traffic). Expenses: $80 (email tool, hosting, design upgrades). Net: $1,420-$5,920.

Digital products have the highest ceiling because each sale has zero marginal cost. One product selling 100 copies at $29 = $2,900 at 95% margin. For a structured approach to launching digital products or any micro-business, The $97 Launch covers the complete playbook.

Comparing the Five Models

Fastest to profit: Local service business (same week). Highest year-one ceiling: Social media agency ($8,000/month). Most passive at scale: Digital products. Lowest skill barrier: Resale/flipping. Best for introverts: Freelance writing or digital products.

The Common Thread

All five businesses share three traits: low startup cost (under $100), service or asset-light model (no heavy inventory), and scalable beyond the founder's time (through systems, contractors, or digital leverage).

Pick One and Start

Don't analyze all five for the next three months. Pick the one that matches your skills and available time, invest under $100, and commit to 30 days of focused execution. The worst case is a $100 lesson. The best case is a business that changes your financial trajectory.