The Finanzio Blog

Plain-English finance guides for saving, investing, debt and trading — with free calculators for every topic.

Investing

How compound interest works (and why starting early matters more than anything)

⏱ 5 min read

Einstein supposedly called compound interest the eighth wonder of the world. Whether or not he said it, the maths is extraordinary — here's how it actually works.

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Retirement

What is your FIRE number? How to calculate when you can retire

⏱ 5 min read

FIRE (Financial Independence, Retire Early) starts with one number. Here's how to calculate yours and what it means for your savings plan.

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Debt

How to pay off debt faster (with a free payoff calculator)

⏱ 4 min read

Avalanche vs snowball — which debt payoff strategy saves the most money? The answer depends on your psychology as much as the maths.

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Trading

What is position sizing and why every trader needs it

⏱ 4 min read

Most traders focus on entries and exits. Position sizing is what actually determines whether you survive long enough to be profitable.

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Property

How much house can you actually afford? (Mortgage calculator)

⏱ 4 min read

Banks tell you the maximum they'll lend. That's not the same as what you should borrow. Here's how to run the real numbers before you commit.

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Personal Finance

Paycheck calculator — how your gross salary becomes take-home pay

⏱ 5 min read

Between federal tax, FICA and state tax, the average worker loses 25–35%. Here's exactly how the deductions work with 2024 brackets.

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Retirement Planning

Retirement savings by age — how much you should have and how to catch up

⏱ 6 min read

Benchmarks at 30, 40, 50 and 60. The 4% rule. How to catch up if you're behind — including the changes that actually move the needle.

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