Mortgage Comparison Calculator

Compare up to four mortgage scenarios side by side. See monthly payments, total costs, and how your equity builds over time. Switch to refinance mode to evaluate refinancing options with break-even analysis.

All calculations happen in your browser. No data is sent anywhere.

Property Details

Loan Scenarios

Monthly Payment Comparison

Total Cost Over Loan Life

Equity Build-Up Over Time

Remaining Balance Over Time

Notes & Assumptions

PMI: Private Mortgage Insurance is estimated at 0.5% of the loan amount annually when down payment is less than 20%. PMI is removed once equity reaches 20% of the original home price. Actual PMI rates vary by credit score and loan-to-value ratio (typically 0.3%-1.5%). CFPB: What is PMI?
Property Tax: California's base property tax rate is 1% (Prop 13), plus local assessments. SF County effective rate is approximately 1.18%. SF Treasurer: Property Taxes
Monthly Payment Formula: M = P[r(1+r)n] / [(1+r)n - 1], where P = principal, r = monthly rate, n = total payments. CFPB: Owning a Home
Closing Costs: Included in total cost calculations. Typical closing costs range from 2-5% of the loan amount. CFPB: Closing
OCR Upload: Loan estimate parsing uses Tesseract.js for optical character recognition and PDF.js for PDF rendering. Supports PDF, PNG, JPG, and WebP files of CFPB-standardized loan estimate documents. PDFs are rendered at 2x resolution for OCR accuracy. Extracted fields should be verified manually.

This calculator provides estimates for comparison purposes only. Actual mortgage terms, rates, and costs will vary. Consult a mortgage professional for precise quotes. Does not account for points or potential rate changes on adjustable-rate mortgages.