Income Engines — Expert Insights & Guides
Self-employment tax, billable rates, and business documents — the tools and guides for freelancers and business owners.
How to Calculate Self-Employment Tax Before Your First Quarterly Payment
SE tax is 15.3% of 92.35% of your net profit — both halves of FICA paid by you. A complete three-step calculation, worked example at $80k net profit, quarterly payment schedule, and the safe harbor rule to avoid IRS penalties.
Salary vs Hourly: How to Convert and Which Actually Pays More
A $60,000 salary equals $28.85/hour on paper — but only until overtime, unpaid extra hours, and benefits enter the equation. This guide converts between salary and hourly, quantifies the hidden value of employer benefits, and shows when hourly workers earn more.
How to Calculate Profit Margin: Gross, Operating, and Net Explained
Profit margin measures how much of each revenue dollar survives as profit. Gross margin ignores overhead; net margin is the true bottom line. A worked example using a freelance consulting business walks through all three with exact formulas and a comparison table.
Break-Even Analysis: How to Calculate When Your Business Starts Profiting
Your break-even point is where total revenue equals total costs. Learn the fixed cost vs variable cost framework, the unit break-even formula, a worked freelance example, and how to use break-even analysis to set pricing and evaluate new services.
How to Price Freelance Services: The Rate Formula Most Beginners Get Wrong
Freelancers underprice because they forget taxes, benefits, unpaid hours, and dry spells. This guide shows the exact formula to calculate your minimum viable rate, why it's usually 30–40% above your hourly equivalent salary, and how to validate it against market rates.
Freelance Tax Deductions: The Complete 2026 Checklist
Freelancers can deduct home office, equipment, software, health insurance premiums, retirement contributions, and half of SE tax from federal income. This guide walks through every major deduction category with IRS rules, qualification requirements, and documentation tips.
W-2 vs 1099: Which Actually Pays More After All Taxes?
A $100,000 W-2 salary and a $100,000 1099 contract are not financially equivalent. The 1099 earner owes self-employment tax and funds their own benefits. This guide shows the full after-tax comparison with a worked example and the premium contractors need to charge to break even.
How to Write a Business Invoice: What to Include and Why It Matters
Every legally valid invoice needs a unique number, due date, itemised line items, and tax breakdown. Learn what to include, standard payment terms, how to number invoices, and how to handle VAT and sales tax.