The learning hub

The reasoning behind the numbers. Each guide explains a decision the calculators help you make — what the trade-offs are, and how to think about them.

Mortgage

Work out what you can actually afford — before you talk to a lender.

beginner12 min read
The First-Time Home Buyer Guide
A complete first-time home buyer guide for the US: what to save, how pre-approval works, what closing costs cover, and the mistakes that cost the most.
Updated January 15, 2026
beginner9 min read
How Much House Can I Afford?
Work out how much house you can afford using the 28/36 rule, your actual budget, and the costs lenders ignore. Includes salary-by-salary examples.
Updated January 15, 2026
intermediate8 min read
Understanding Mortgage Rates
How mortgage rates are determined, what moves them, and the six factors that decide whether you get the advertised rate or half a point above it.
Updated January 15, 2026

Investing

See what consistent contributions actually turn into over decades.

beginner11 min read
Investing for Beginners
A beginner's guide to investing in the US: account order, index funds, fees, asset allocation and the behavioral mistakes that cost the most.
Updated January 15, 2026
beginner6 min read
Understanding Inflation
How inflation erodes purchasing power, what protects against it, and why every long-range financial projection needs an inflation adjustment.
Updated January 15, 2026

Retirement

Find the number you need, and the date it becomes reachable.

intermediate12 min read
The Retirement Planning Guide
How to calculate what you need to retire, choose between Roth and traditional accounts, and understand withdrawal rates and Social Security timing.
Updated January 15, 2026

Debt

Pick the order, see the date, and know what the shortcut costs.

beginner10 min read
Debt Payoff Strategies That Work
Compare debt payoff methods, understand when consolidation helps, and see why payment size matters far more than payoff order.
Updated January 15, 2026

Credit

Understand what actually moves a FICO score — and what doesn't.

beginner9 min read
The Credit Score Guide
How FICO scores are calculated, what each factor is worth, and the actions that genuinely improve a credit score versus the ones that feel productive.
Updated January 15, 2026

Budgeting

Build the cushion first, then optimize everything else.

beginner7 min read
The Emergency Fund Guide
How to size an emergency fund on essential expenses, where to keep it, and why it comes before aggressive debt payoff or investing.
Updated January 15, 2026
beginner8 min read
Budgeting Basics
How to build a budget on take-home pay using the 50/30/20 framework, account for irregular annual costs, and fix the categories that actually matter.
Updated January 15, 2026

Taxes

Know your real marginal rate before you make a tax decision.

beginner9 min read
Understanding US Taxes
How US federal tax brackets work, the difference between marginal and effective rates, and the deductions and accounts that actually reduce your bill.
Updated January 15, 2026