Money Guides

Worked examples that explain the numbers behind borrowing, saving, investing and pay.

• How Mortgage Amortization Works, and What Extra Payments Really SaveWhy early mortgage payments are mostly interest, when the balance starts falling quickly, and the measurable effect of paying a little extra.
• APR vs. APY: What the Difference Costs or Earns YouAPR leaves compounding out and APY includes it. Here is how to convert between them and why lenders and banks each quote the one that flatters them.
• Hourly vs. Salary: How to Compare Two Job Offers FairlyConvert any offer to a true hourly figure, account for overtime and unpaid hours, and see which job actually pays more.