Decision planning under uncertainty
Rent vs Buy Calculator
Monte Carlo comparison of buying vs. renting a home
Current result
Enter valid assumptions to calculate your plan
Results update automatically as inputs change.
Parameters
Standalone analysis — does not affect Retirement or Time to FI projections
How long you plan to stay before selling
Annual rent: $30,000
Agent fees + closing typically 5-6%
Fix the inputs above to run the simulation.
Should You Rent or Buy?
The rent vs. buy decision depends on more than just monthly payments. FIREwiz models the full financial picture—mortgage costs, property taxes, maintenance, insurance, closing costs, and opportunity cost of your down payment—against renting and investing the difference in a diversified portfolio.
Instead of using a single assumed appreciation rate, the simulator runs hundreds of scenarios using historical market returns to show you a range of outcomes. See how often buying wins vs. renting, the break-even year, and net worth comparisons at every point in the analysis period.
Adjust mortgage terms, down payment, expected rent increases, property appreciation, and your investment allocation to match your situation. Results show both the probability that buying wins and the magnitude of the difference—because a strategy that wins 60% of the time but loses big in the other 40% may not be the right choice for everyone.