Financial Guides
Plain-language articles that explain financial concepts, walk through example calculations, and link directly to our free calculators.
Mortgage & Real Estate
How Much House Can You Afford?
Understand the 28/36 rule, down payment requirements, and hidden homeownership costs.
What Affects Your Monthly Mortgage Payment?
Five key variables that determine your payment — and how small changes add up to tens of thousands.
15-Year vs 30-Year Mortgage
A direct comparison of monthly payments, total interest, and the trade-offs of each term.
Compound Interest & Investing
How Compound Interest Works
The formula, the math, and why time is the most important variable in long-term saving.
Compound Interest vs Simple Interest
A side-by-side comparison over short and long time horizons — with real examples.
Why Starting to Invest Early Matters
The numbers behind why time in the market outweighs the amount you invest.
Salary & Take-Home Pay
Salary After Tax Explained
What happens between your gross salary and your net paycheck — in plain language.
How Federal Income Tax Brackets Work
Marginal vs effective rates, 2024 brackets, and why earning more does not mean losing more.
Gross Pay vs Net Pay
The difference between what you earn and what you take home — and why it matters for budgeting.
Loans & Debt
How to Calculate Your Monthly Loan Payment
The amortization formula, a step-by-step example, and how each variable affects your payment.
How Loan Interest Works
Why early payments mostly cover interest and how front-loading affects total cost.
Does Paying Off a Loan Early Save You Money?
When early payoff makes sense, prepayment penalties to watch for, and the opportunity cost question.
Hourly vs Salary
How to Convert Hourly Wage to Annual Salary
The standard formulas, common assumptions, and how to adjust for actual hours worked.
Hourly vs Salary: Key Differences
Pay structure, overtime eligibility, benefits, and how to compare offers accurately.
How Many Working Hours Are in a Year?
The standard 2,080-hour figure and how holidays and vacation change the real number.
Investment Returns
How to Calculate Investment Return
Total return, annualized return, and real return — with worked examples for each.
What Is CAGR (Compound Annual Growth Rate)?
Why CAGR is more useful than average return and how to calculate it yourself.
Dollar Cost Averaging Explained
How investing a fixed amount on a regular schedule reduces the impact of market timing.