How to Use the Rent vs Buy Calculator
The decision to rent or buy a home should be based on cold, hard math, not societal pressure. Our rent vs buy calculator breaks down the total financial impact of both choices over 5, 10, and 20 years to reveal your exact "break-even" point.
Understanding the Sunk Costs
The core of the rent vs buy debate comes down to comparing unrecoverable costs.
- The Sunk Costs of Renting: 100% of your rent payment goes to your landlord. None of it builds your personal wealth. Furthermore, rent increases annually, compounding your losses over time.
- The Sunk Costs of Buying: Buying is not entirely an investment. The unrecoverable costs of homeownership include mortgage interest, property taxes, homeowners insurance, HOA fees, and maintenance. In the first 5 years of a 30-year mortgage, the vast majority of your payment is completely lost to interest.
The Break-Even Point Explained
Because buying a house requires massive upfront capital (closing costs, down payment), renting is almost always mathematically cheaper in the short term. However, as years pass, home appreciation and the equity you build via principal paydown eventually surpass the sunk costs of renting. The year where buying mathematically overtakes renting is your break-even point.
The Opportunity Cost of Your Down Payment
Our calculator factors in a crucial economic concept: Opportunity Cost. If you buy a $400k house, you must lock up $80,000 in cash for the down payment. If you choose to rent instead, you can invest that $80,000 in the stock market. The calculator compares the potential growth of your stock portfolio against the potential appreciation of the house to determine the true winner.