Finance Guides
Plain-English explainers with formulas, worked examples and links to the right calculator — ROI, salary, freelance rates, loans and rental yield.
ROI: The Complete Guide to Measuring Return on Investment
Return on investment is the simplest way to judge whether money in was worth it. Learn the formula, the traps, and how ROI differs from ROAS and margin.
Read guide (8 min read) SalaryHow to Calculate Your Salary After Tax
Gross pay is not what lands in your account. Here is how to estimate your net salary, understand deductions, and compare offers properly.
Read guide (7 min read) FreelanceHow to Set Your Freelance Rate
Most freelancers price backwards. Start from the income you need, add taxes and non-billable time, and you get a rate that actually sustains you.
Read guide (8 min read) LoansLoan Amortization: How Your Payments Really Work
Every loan payment contains interest and principal in changing proportions. Understanding that split is the key to paying less interest and finishing sooner.
Read guide (8 min read) Real estateRental Yield: How to Judge a Buy-to-Let Properly
Rental yield tells you what a property earns relative to its price — but gross yield flatters and net yield tells the truth. Here is how to use both.
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