Loan Details
$
%
years
Additional Costs
$
Monthly: $300
$
Monthly: $100
%
of loan amount annually
$
20% of home value
Monthly Payment (P&I)
$1,520
per month
Total Monthly Payment
$1,920
Including tax, insurance, PMI
Total Interest
$247,220
Over the life of loan
Payment Breakdown
Total Cost
$547,220
Principal: $300,000
Interest: $247,220
Loan Summary
Loan Amount
$300,000
Down Payment
$60,000
Home Price
$360,000
Interest Rate
4.5%
Total Payments
360
Payoff Date
Apr 2056
Extra Payment Calculator
$
$
Interest Saved
$0
Time Saved
0 months
New Payoff Date
Apr 2056
Amortization Schedule
Payment # Payment Date Payment Principal Interest Extra Payment Remaining Balance Total Interest
Compare Loan Options
Interest Rate Comparison
%
%
%
%
Interest Rate Monthly Payment Total Interest Total Cost Difference
Loan Term Comparison
years
years
years
years
Loan Term Monthly Payment Total Interest Total Cost Interest Saved vs 30yr
Current Loan
$
%
years
years
$
Leave blank to auto-calculate
New Loan
%
years
$
$
Refinance Analysis
Current Monthly Payment
$1,703
New Monthly Payment
$1,194
Monthly Savings
$509
Break-even Point
6 months
Total Interest Savings
$45,200
Net Savings (after costs)
$42,200
Your Financial Profile
$
$
Car loans, credit cards, student loans, etc.
$
%
years
Affordability Results
Maximum Home Price
$325,000
Max Monthly Payment
$1,875
Debt-to-Income (Front)
28%
Debt-to-Income (Back)
36%
Required Down Payment (20%)
$65,000
Loan Amount
$260,000
PMI Required
Yes
Conservative vs Aggressive
Conservative (25% DTI)
$290,000
Monthly: $1,675
Standard (28% DTI)
$325,000
Monthly: $$1,875
Aggressive (36% DTI)
$420,000
Monthly: $2,425
Bi-Weekly Payment Analysis

Bi-weekly payments (26 per year) result in one extra monthly payment annually, accelerating your payoff.

Bi-Weekly Payment
$760
Effective Extra Payment/Year
$1,520
Interest Saved
$38,500
Time Saved
4.5 years
Prepayment Penalty Calculator
%
$
Estimated Penalty
$5,000
Interest-Only Period Analysis
Interest-Only Payment
$1,125
During IO period
Payment After IO Period
$1,897
For remaining 25 years
Additional Interest Cost
$28,500
vs standard amortization
API Documentation
Calculate Monthly Payment
POST /api/v1/calculate/payment
{ "loanAmount": 300000, "interestRate": 4.5, "loanTerm": 30, "paymentFrequency": "monthly" }
Generate Amortization Schedule
POST /api/v1/calculate/amortization
{ "loanAmount": 300000, "interestRate": 4.5, "loanTerm": 30, "extraPayment": 100, "startDate": "2026-04-01" }
Affordability Check
POST /api/v1/calculate/affordability
{ "annualIncome": 75000, "monthlyDebts": 500, "downPayment": 50000, "interestRate": 4.5, "loanTerm": 30 }
Refinance Analysis
POST /api/v1/calculate/refinance
{ "currentBalance": 250000, "currentRate": 5.5, "currentTerm": 30, "yearsPaid": 5, "newRate": 4.0, "newTerm": 30, "closingCosts": 3000 }
Bank Integration (Sample)

Connect with supported banks to import loan details automatically.

GET /api/v1/banks/list
{ "banks": [ { "id": "chase", "name": "Chase Bank" }, { "id": "boa", "name": "Bank of America" }, { "id": "wells_fargo", "name": "Wells Fargo" } ] }