Finance Calculators
Mortgage Calculator
Calculate your monthly mortgage payments including principal, interest, and the impact of your down payment. See how much home you can afford.
Formula Used
Monthly Payment = P × [r(1+r)^n] ÷ [(1+r)^n − 1], where P = loan amount (home price minus down payment), r = monthly interest rate, n = total months.
About This Calculator
What It Does
Calculate your monthly mortgage payment based on the home price, your down payment, the loan term, and the interest rate. See the loan amount, total interest, and total repayment over the life of the loan. This calculator covers principal and interest only — it does not include property taxes, homeowners insurance, HOA fees, or mortgage insurance (PMI). Use it to understand how your down payment size, loan term, and interest rate interact. A larger down payment means a smaller loan and less interest. A shorter term means higher payments but dramatically less total interest.
Worked Example
Example 1 — Standard: A 200,000€ home with 40,000€ down (20%) leaves a 160,000€ loan. Over 30 years at 3.5%: monthly payment ≈ 718€. Total interest ≈ 98,000€. Example 2 — Shorter term: Same 160,000€ loan at 3.5% but over 20 years: monthly payment ≈ 928€. Total interest ≈ 62,700€. Saving 35,300€ in interest. Example 3 — Larger down payment: A 200,000€ home with 60,000€ down (30%) leaves a 140,000€ loan at 3.5% over 30 years: monthly payment ≈ 629€. Total interest ≈ 85,700€.
Real-World Usage
Home buyers use this to determine their price range before starting their search. Compare fixed and variable rate scenarios. See how a 15-year vs 30-year term fits your budget. Real estate agents use it to illustrate affordability. Refinancing decisions: compare current loan terms against a new offer. Use it to plan — a larger down payment reduces not just your monthly payment but also the total interest by tens of thousands.
Local Context
Portuguese mortgages typically run 30 years with variable rates (Euribor + spread 1.5-2%). The standard down payment is 20%. The average spread is around 1.5-2%. Banks offer associated life and home insurance. The debt-to-income ratio should not exceed 50%. Young buyers benefit from IMT exemption up to certain limits. Early repayment penalties are reduced.
Sources and Methodology
Mortgage estimates use standard amortization formulas plus configured country-specific assumptions for taxes, fees, insurance, or purchase costs where available. Check final affordability, fees, and eligibility with lenders and official housing, tax, or central bank sources for your jurisdiction.
Last reviewed: May 2026.
This is an estimate only and does not constitute a loan offer or commitment. Actual rates, terms, and payments depend on lender policies, credit score, property location, and other factors.
Frequently Asked Questions
What down payment do I need for a Portuguese mortgage?
Portuguese banks typically require 10-20% down for residents, 20-30% for non-residents. First-time buyers may access subsidized rates under youth programs.
What is the debt ratio (taxa de esforço) in Portugal?
The debt ratio is your total monthly loan payments divided by net income. Portuguese banks generally limit this to 50% (well above the 35% standard in other EU countries).
Is it worth making early repayments in Portugal?
Early repayment penalties are limited. Partial early repayment can significantly reduce total interest. Variable rate mortgages benefit most from extra payments.