Health Insurance Deductible: How It Works With Premiums and Copays
A deductible is not a premium and not a cap. Here is the order money moves through a health plan, with a worked example.
Read the explainerMoney, explained properly.
The concepts behind everyday money decisions — interest, fees, inflation, credit, cover — defined in one sentence, shown with the actual maths, then turned into a short checklist you can act on.
Latest explainers
All articlesHigh-Yield Savings Account: What It Is and How to Compare APY
A high-yield savings account pays more than a branch account for the same cash. Here is the maths, what to…
What Is a Dividend? Yield, Payout Ratio and Taxes
A dividend is a cash payment out of profits. How yield is calculated, what the payout ratio tells you, and…
Volatility Explained: Why Prices Swing and When It Matters
Volatility is the size of price swings, not the risk of permanent loss. The difference, volatility drag, and what to…
What Is Escrow? Closing, Shortages and Annual Analysis
Escrow is a third party holding money until conditions are met. How closing escrow works, and how a mortgage escrow…
The Rule of 72: How Fast Does Your Money Double?
Divide 72 by the return to estimate doubling time. Where it is accurate, how to use it for debt and…
Opportunity Cost: What You Give Up When You Choose
The cost of a choice is the best alternative you gave up. Formula, a worked $30,000 example, and how it…
Money basics
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Money basics
The core ideas behind every money decision: interest, inflation, returns, risk. Each explainer gives a one-sentence definition, the formula, and a worked example.
The Rule of 72: How Fast Does Your Money Double?
Divide 72 by the return to estimate doubling time. Where it is accurate, how to use it for debt and…
Opportunity Cost: What You Give Up When You Choose
The cost of a choice is the best alternative you gave up. Formula, a worked $30,000 example, and how it…
What Is Inflation and How Does It Affect Your Savings?
Inflation is the rate at which prices rise, which means every dollar buys less. How to calculate your real return,…
Saving & banking
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Saving & banking
Savings accounts, yields, emergency funds and deposit protection ??what the numbers on the account actually mean.
High-Yield Savings Account: What It Is and How to Compare APY
A high-yield savings account pays more than a branch account for the same cash. Here is the maths, what to…
How Much Emergency Fund Do You Actually Need?
Three to six months of essential expenses, not income. How to calculate your number, when to hold more, and where…
Investing
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Investing
Funds, fees, asset allocation and how investment returns are built. Concepts first, products second.
What Is a Dividend? Yield, Payout Ratio and Taxes
A dividend is a cash payment out of profits. How yield is calculated, what the payout ratio tells you, and…
Volatility Explained: Why Prices Swing and When It Matters
Volatility is the size of price swings, not the risk of permanent loss. The difference, volatility drag, and what to…
Dollar-Cost Averaging: What It Is and When It Helps
Investing a fixed amount on a schedule smooths your entry price. A worked example and when a lump sum still…
Debt & credit
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Debt & credit
What borrowing really costs: APR, credit scores, mortgage structures and the maths of paying debt down.
What Is Escrow? Closing, Shortages and Annual Analysis
Escrow is a third party holding money until conditions are met. How closing escrow works, and how a mortgage escrow…
Debt Avalanche vs Debt Snowball: Which Pays Off Faster?
One targets the highest rate, the other the smallest balance. Running both on the same three debts shows the real…
What Is a Credit Score and What Actually Moves It?
The five factors behind the number, how utilisation is calculated, and the fastest legitimate ways to raise it.
Insurance
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Insurance
Premiums, deductibles, coverage limits and what a policy actually pays. Plain-English policy mechanics.
Actual Cash Value vs Replacement Cost: What Insurance Pays
Depreciation decides whether a claim replaces your roof or pays half of it. The maths and how payouts work.
Coinsurance vs Copay: What You Actually Pay
One is a flat fee, the other a percentage after the deductible. Why the difference shows up on big bills.
Out-of-Pocket Maximum: The Cap on Your Worst Year
The ceiling on what you pay for covered care, and how it stacks with the deductible and coinsurance.
New here? Start with the three questions we answer most.
Every explainer follows the same shape: a one-sentence definition, the math with real numbers, the mistakes people make, and a short checklist.
- 01What is it?
The plain-English definition, without the jargon.
- 02How is it calculated?
The formula, plus a worked example you can check.
- 03Should you do it?
The trade-offs that decide the answer for your situation.