Blog
Tips, tutorials, and updates from the Molixa team
Finance
How to Write an Invoice for Freelance Work
Your first client invoice should not be a guess. Here is exactly what every freelance invoice must include, how to number and date it, the payment-term wording that gets you paid faster, and a free generator that exports a clean PDF.
How to Validate a Crypto Wallet Address
Sending crypto to a malformed address means losing it forever. Here is exactly how to validate a wallet address across every major chain before you hit send.
How to Calculate Take-Home Pay After Taxes
Gross pay is not what lands in your bank account. This guide breaks down the exact formula that turns your salary into take-home pay, with a worked example and a free calculator for 9 countries.
Margin vs Markup: The Difference That Costs You Money
A 30% markup is not a 30% margin, it is about 23%, and that gap quietly erodes profit. Here is the difference, both formulas, and how to convert between them.
Salary Calculator: Negotiate Like You Know What You're Worth
I helped a friend negotiate $18k more on her offer with one calculator. Here's the tool + framework that gets you paid.
ROI Calculator: How to Measure Investment Returns Like a Pro
I run an ROI calculation before every investment, marketing spend, and SaaS purchase. Here's the framework + free tool that prevents bad bets.
Crypto Tax Calculator: Avoid IRS Trouble Without Paying $200/Year
I tested 5 crypto tax tools. The paid ones cost $50-200/year for math you can do free. Here's the working free option.
Free Mortgage Calculator: Crush Your Home Loan in 2026
I used a mortgage calculator to save $74,000 on my home loan. Here's the exact tool + strategy you can use too.
Compound Interest Calculator: How $100/Month Becomes $1M
Most people don't understand compound interest. I'll show you the math, the free calculator, and the one decision that 10x'd my future net worth.