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stop mortgage payments once balance reaches zero

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Johannes
2026-03-20 02:58:50 +01:00
parent aab89d83e9
commit 1acc85fa26
1 changed files with 5 additions and 4 deletions
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9
calc.js
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@@ -87,16 +87,17 @@ function run_simulation(p) {
for (let m = 1; m <= months; m++) {
// --- buy side ---
const interest_m = balance * r_m;
const principal_m = monthly_payment - interest_m;
const has_debt = balance > 0;
const interest_m = has_debt ? balance * r_m : 0;
const principal_m = has_debt ? Math.min(balance, monthly_payment - interest_m) : 0;
balance = Math.max(0, balance - principal_m);
home_value *= (1 + app_r_m);
const prop_tax_m = home_value * (p.prop_tax_rate / 100) / 12;
const maint_m = home_value * (p.maint_rate / 100) / 12;
const insurance_m = p.insurance / 12;
// German context: no mortgage interest tax deduction for private buyers
const total_buy_m = monthly_payment + prop_tax_m + maint_m + insurance_m;
const mortgage_m = has_debt ? monthly_payment : 0;
const total_buy_m = mortgage_m + prop_tax_m + maint_m + insurance_m;
yr_interest += interest_m;
yr_principal += principal_m;