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Guides
Finance, explained with the numbers left in
Most money content either sells something or pads a word count. These guides do neither: each one states the rule, works a real example with real figures, and links to the calculator that runs the same maths on your own numbers.
Looking for tax and cost rules where you live? The state-by-state guides cover sales tax, income tax and property tax for all 50 states and DC, plus the largest cities.
Personal Finance
How Compound Interest Works (With Real Number Examples)
How compound interest works, with real numbers: the formula, why the early years matter most, and what fees and inflation change. Free calculator included.
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How to Build an Emergency Fund (How Much You Actually Need)
How to build an emergency fund: how much you actually need, where to keep it, and the order to build it in — without derailing your other goals.
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What Is the 50/30/20 Rule? Budget Breakdown With Examples
What is the 50/30/20 rule? What it gets right, where it breaks in expensive cities, and how to adapt the percentages to your actual rent.
Read the guideMortgage & Real Estate
Mortgage Amortization Explained: How Your Payments Are Split
How mortgage amortization works: why early payments are mostly interest, how the schedule shifts over time, and what extra payments actually change.
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How Much House Can You Actually Afford? (28/36 Rule Explained)
How much house can you afford? The 28/36 rule lenders use, why the bank's maximum is not your budget, and the costs listings never show.
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Renting vs Buying a Home: The Real Costs Compared (2026)
Renting vs buying a home: the real costs on both sides, the break-even point most people miss, and how to tell which choice wins for you.
Read the guideLoans & Debt
Debt Avalanche vs Snowball: Which Payoff Method Saves More?
Debt avalanche vs snowball: avalanche saves the most interest, snowball clears debts fastest. The maths, the trade-off, and how to choose yours.
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How Credit Card Interest Is Calculated (APR Explained)
How credit card interest is calculated: average daily balance, grace periods, and why minimum payments keep you in debt — with the numbers statements hide.
Read the guideSalary, Tax, Retirement & Investing
How Federal Income Tax Brackets Work in 2026 (With Examples)
How tax brackets work: marginal vs effective rates explained with a worked example — and what actually happens when a raise moves you up a bracket.
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How to Read Your Paycheck (Pay Stub): Deductions Explained
How to read your paycheck: gross pay, FICA, withholding and every deduction line explained — plus two mistakes worth checking every year.
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Roth vs Traditional IRA: Which Is Better for Your Taxes?
Roth vs traditional IRA: both shelter growth, so the choice is when you pay tax — a bet on your current bracket vs your retirement bracket. How to decide.
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How Social Security Benefits Are Calculated: The Formula
How Social Security benefits are calculated: your 35 best years, why claiming age moves the amount by 76%, and the spousal and tax rules that matter.
Read the guideFreelance & Business
Self-Employment Tax 2026: Rate, Deductions & How It Works
Self-employment tax explained: the 15.3% rate, the 92.35% rule, the deduction most freelancers miss, and how quarterly payments actually work.
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How to Price Freelance Work: Rates, Formulas & Real Examples
How to price freelance work from your costs up: the billable-hours reality, why hourly pricing caps your income, and how to move to project pricing.
Read the guideCreator & E-Commerce
How YouTube Pays Creators: CPM, RPM & Payout Rules Explained
How YouTube pays creators in 2026: CPM vs RPM, the 55% revenue share, why niches pay so differently, and what a million views is really worth.
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Etsy and eBay Fees Explained: 2026 Rates, Line by Line
Etsy and eBay fees explained line by line: every charge on a typical sale, what they add up to, and how to price so the platform keeps less of your margin.
Read the guideGuides for every state and major city
Sales tax rates, income tax structures, grocery rules and property taxes differ by where you live and sell. 51 state guides and 30 city guides lay out the figures that change your calculations.