Parameters for the US30-year fixed is the benchmark. PMI required if LTV > 80%. Closing costs typically 2–5% of loan amount. — Fixed 30yr · LTV max 97% · DTI max 43% · Max 30 years
Property Details
Affordability Check
Acceptable — between recommended (28%) and max (43%)
Monthly Payment
$1,825
per month · 30 years
Total Cost Breakdown
FHA loans allow up to 97% LTV. Conventional loans typically 80-95%. DTI limit is 43% for qualified mortgages.
Amortization Schedule
30 years · 360 payments| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $2,956 | $18,949 | $277,044 |
| 2 | $3,163 | $18,742 | $273,881 |
| 3 | $3,385 | $18,520 | $270,496 |
| 4 | $3,622 | $18,282 | $266,874 |
| 5 | $3,877 | $18,028 | $262,997 |
| 6 | $4,149 | $17,756 | $258,849 |
| 7 | $4,440 | $17,465 | $254,409 |
| 8 | $4,751 | $17,154 | $249,658 |
| 9 | $5,084 | $16,820 | $244,573 |
| 10 | $5,441 | $16,463 | $239,132 |
| 30 | $21,119 | $786 | $0 |
Market benchmarks — Portugal
Sources: Banco de Portugal / BCE, Agosto 2026
About This Calculator
This Mortgage Calculator helps prospective homeowners and real estate investors estimate their monthly mortgage payments, total interest paid over the loan term, and visualize the amortization schedule. It's crucial for anyone planning to finance a property purchase, enabling them to understand the long-term financial commitment and optimize their borrowing strategy. By providing a clear financial roadmap, users can make informed decisions about affordability and investment returns.
How It Works
Loan Amount
Input the total amount you need to borrow for the property. This is typically the purchase price minus your down payment, and it directly impacts your monthly payments and total interest.
Interest Rate
Enter the annual interest rate offered by your lender. Even small differences in this rate can significantly alter your total cost of borrowing over the life of the loan, often by tens of thousands of euros.
Loan Term
Specify the duration of your mortgage in years. Common terms are 15, 20, or 30 years, with shorter terms generally leading to higher monthly payments but significantly less total interest paid.
Payment Frequency
Select how often you plan to make payments (e.g., monthly, bi-weekly). Monthly is standard, but more frequent payments can slightly reduce the total interest due to faster principal reduction, saving you money over time.
Worked Example — Austin, Texas, United States
For a primary home in Austin, Texas, United States, compare a $360,000 purchase funded by $270,000 at 6.4%.
- →Enter the purchase price, deposit, current local rate and remaining term.
- →Review the payment, total interest and affordability output produced by the calculator.
- →Test a higher rate and preserve an emergency reserve before choosing a loan.
The result shows the sensitivity of this local financing scenario; confirm the lender's binding conditions.
Frequently Asked Questions
Mortgage Guide
What is a Mortgage?
A mortgage is a loan secured by real estate. The lender finances the purchase and the property serves as collateral. In the US, the CFPB regulates mortgage lending, with a maximum DTI of 43% for qualified mortgages. FHA loans allow up to 97% LTV with mortgage insurance.
Fixed vs Adjustable Rate Mortgages
Fixed-rate mortgages offer predictable payments for the full loan term (15 or 30 years). Adjustable-rate mortgages (ARMs) start with a lower rate that adjusts periodically. The 30-year fixed is the most popular mortgage product in the US, offering stability and lower monthly payments.
Transaction Costs in the US
Closing costs typically run 2-5% of the loan amount and include: origination fees, appraisal, title insurance, escrow fees, prepaid taxes and insurance. Unlike many European countries, the US has no transfer tax at the federal level, though some states and localities impose one.
Tips for Better Mortgage Terms
Maintain a DTI below 28% for the best rates. Save 20% to avoid PMI (private mortgage insurance). Compare offers from at least 3 lenders. Consider paying points to lower your rate if you plan to stay long-term. Check your credit score — a score above 760 typically qualifies for the best rates.
Prepayment and Refinancing
Most US mortgages allow prepayment without penalty. Making extra principal payments can save tens of thousands in interest over the loan term. Refinancing makes sense when rates drop at least 0.75-1% below your current rate, accounting for closing costs. The break-even point is typically 2-3 years of savings vs. refinancing costs.