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The Math That Decides Whether You Should Rent or Buy a Home

Most people approach the rent vs buy decision emotionally. "Renting is throwing money away." "Buying is the best investment you'll ever make." "My parents bought, so I should too."

The math tells a different story — and it's more surprising than most people expect.

The Hidden Costs Nobody Talks About

When you buy a home, your monthly payment isn't just the mortgage. You're also paying:

  • Property tax — typically 1-2% of home value per year
  • Home insurance — higher than renter's insurance
  • Maintenance — the rule of thumb is 1% of home value per year
  • Opportunity cost — the down payment could have been invested elsewhere

These "unrecoverable costs" are money you'll never see again — just like rent. The question is: which number is smaller?

The 5% Rule (A Rough Heuristic)

A popular rule of thumb says: multiply the home price by 5%, then divide by 12. If that number is higher than your rent, renting is cheaper. If lower, buying might be better.

Example: A $400,000 home → 5% = $20,000/year → $1,667/month. If you can rent a comparable place for $1,500, renting wins.

Where does 5% come from?

| Cost | Annual % |
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