Portugal Mortgage Calculator
New housing loans (avg. agreed rate):3,00%· Aug 2026
Your loan
Pre-filled with the latest official average: 3,00% (Aug 2026, European Central Bank, MFI interest rate statistics).
- Principal & interest€1,138
Upfront costs
- Down payment€30,000
- Transfer tax%€9,000
- Stamp duty%€2,400
- Notary & registry%€1,500
- Cash needed at purchase€42,900
What if interest rates change?
Your payment today is just the start. See how it could move if rates go up or down during your loan.
Range: 2,85% to 3,15% · The rate resets once a year.
Likely range of your monthly payment
- Most likely
- 80% of outcomes
- Middle 50% of outcomes
- If today's rate holds
In 8 out of 10 simulated futures, you pay between €136,835 and €142,620 in total interest (today's rate: €139,799).
| Scenario | Avg. monthly | Highest monthly | Total interest | vs. today |
|---|---|---|---|---|
| Rate stays at 3,00% | €1,138 | €1,138 | €139,799 | — |
| Drops to 2,85% at first reset | €1,118 | €1,138 | €132,448 | ▼ −€7,351 |
| Rises to 3,15% at first reset | €1,159 | €1,160 | €147,228 | ▲ +€7,428 |
| Climbs steadily to 3,15% | €1,145 | €1,150 | €142,336 | ▲ +€2,537 |
| Falls steadily to 2,85% | €1,131 | €1,138 | €137,276 | ▼ −€2,523 |
| Spikes to 3,15% for 3 years | €1,142 | €1,160 | €141,146 | ▲ +€1,347 |
Based on 600 simulated rate paths that drift randomly within your range and tend back toward today's rate. This is an illustration, not a forecast.
Loan balance over time
- Remaining balance
- Interest paid (cumulative)
- Principal paid (cumulative)
Interest rates in Portugal
Monthly averages. Sources: European Central Bank, MFI interest rate statistics
Buying a home in Portugal: rules and costs
- Buyers pay the property transfer tax (IMT), which is progressive, plus 0.8% stamp duty on the price.
- Buyers aged 35 or under can be exempt from IMT and stamp duty on a first home up to a yearly-updated price limit.
- Most mortgages follow Euribor; Banco de Portugal limits loan-to-value to 90% for own homes and caps the debt-service ratio.
Sources: Banco de Portugal — Portal do Cliente Bancário · Rules last reviewed 2026-10.
Frequently asked questions
How is the monthly mortgage payment calculated?
For an equal-payment loan, the payment is P × i × (1 + i)^n ÷ ((1 + i)^n − 1), where P is the loan amount, i the monthly interest rate and n the number of months. Taxes, insurance and fees are added on top.
What is the current average mortgage rate in Portugal?
The latest official figure is 3,00% for New housing loans (avg. agreed rate) (Aug 2026, source: European Central Bank, MFI interest rate statistics). Your own rate depends on your deposit, income, credit history and lender.
How much does a 1-point rate rise change my payment?
On a €270,000 loan over 30 years, going from 3,00% to 4,00% raises the monthly payment from €1,138 to €1,289 — about €151 more each month.
What upfront costs should I budget for in Portugal?
On a €300,000 purchase, expect about €12,900 in taxes and fees on top of your down payment. The breakdown is shown in the calculator above.
Can this calculator predict future interest rates?
No. The scenario tool shows a range of possible outcomes based on the band you choose. Nobody can predict rates reliably — use it to check whether you could still afford the loan if rates rise.