Compare mortgage terms & strategies to find your optimal wealth-building path
Your Financial Profile
Income & Taxes
$
If checked, mortgage interest reduces taxable income
0%
$0
🏠 Home & Costs
$
$
%
%
%
%
$0 (0%)
$0/mo
📈 Investments
$
%
$
$
Groceries, utilities, insurance, etc. (excl. housing)
⚙️ Strategy & Growth
%
%
%
%
Show future values in today's purchasing power
🏠 Rent Alternative
$
%
This scenario invests the down payment and monthly savings (Buy Cost - Rent) into the market.
Mortgage Term Assumptions
Include Rent Scenario
Include Cash Scenario
Scenario Optimizer
Iterate through different down payments, term lengths, and extra payments to find the mathematically optimal strategy for your budget.
$
Any cash not used for the down payment will be invested.
🏦 Mortgage Terms
10-YearFastest
%
Monthly P&I$0
Surplus/Mo$0
Total Interest$0
15-YearBalanced
%
Monthly P&I$0
Surplus/Mo$0
Total Interest$0
30-YearLow PMT
%
Monthly P&I$0
Surplus/Mo$0
Total Interest$0
💸 Extra Principal Payment (Applied to ALL Scenarios)
$
This extra amount goes toward principal, reducing your investable
surplus.
$0
Maximum you could put toward extra payments with the 30-year mortgage.
⚖️ Opportunity Cost Analyzer
Comparison of applying the "Additional Monthly Principal" to the mortgage vs. investing it.
📈
Invest the Extra
$0
Potential Growth (30yr)
VS
🏠
Pay Mortgage
$0
Interest Saved (30yr)
Enter an extra payment amount to see the trade-off.
📊 Sensitivity Analysis: How Investment Return Affects the Winner
See which strategy wins at different investment return rates. Your current rate is highlighted.
⚡ Why Do Results Converge?
When investment returns are close to mortgage rates, the interest saved by paying off early is
almost exactly offset by the extra investment gains from having more money in the market earlier.
The 30-year mortgage invests more in the early years (compounding longer), while the 10-year pays
less interest but invests less early on.
🏆 Scenario Comparison at Year 30
$0
Interest Saved (10yr vs 30yr)
$0
Extra Invested Early (30yr advantage)
$0
Total Contributed (10yr)
$0
Total Contributed (30yr)
Scenario
Monthly P&I
Payoff
Total Interest
Home Value
Home Equity
Investments
Net Worth
📈 Net Worth Over Time
10-Year
15-Year
30-Year
Rent
💵 Monthly Cash Flow Over Time
See how your monthly surplus changes. Dramatic spike when mortgage is paid off!
10-Year
15-Year
30-Year
Rent
📋 Detailed Breakdown
💡 Key Insights
Best Strategy
--
Loading...
Rate Spread (Invest - Mortgage)
--
Pay debt
Invest
Break-Even Investment Return
--
Below this rate, pay debt faster. Above,
invest more.