IMI Tax Calculator 2026: How Much Will You Pay? (Rates & Exemptions)

Last Updated: January 7, 2026 | By: Immo Lusitania

When you buy a property in Portugal, the purchase price is just the beginning. The most important ongoing cost you need to budget for is IMI (Imposto Municipal sobre Imóveis).

Unlike the US, where property taxes can be 2-3% of the value, Portugal’s rates are surprisingly low. However, the system is complex. There are hidden “Wealth Taxes” for luxury villas, and—crucially—generous exemptions that many foreign buyers miss out on because they simply don’t ask.

As a Buyer’s Representative, I calculate this for every client before they make an offer. Here is my guide to estimating your 2026 tax bill.

1. The IMI Formula: How to Calculate It

You do not pay tax on the Market Price (what you paid). You pay on the VPT (Valor Patrimonial Tributário).

• Market Price: €500,000 (Example)

• VPT (Taxable Value): Usually ~70-80% of the market price for new properties, or much lower for older ones.

The Formula:

ANUAL IMI = VPT X Municipal Rate

The 2026 Rates

Each municipality sets its own rate annually.

• Urban Properties (Apartments/Villas): 0.3% to 0.45%

• Rustic Land (Agricultural): 0.8% (Flat rate)

📝 Example Calculation (2-Bed Apartment in Lagos):

• You buy for €400,000.

• The Tax Authority (Finanças) values it (VPT) at €280,000.

• Lagos Municipality Rate: 0.3%.

• Your Bill: €280,000 × 0.3% = €840 per year.

2. The “Golden Ticket”: 3-Year Exemption

This is the most common question I get: “Can I get tax-free years?”

Yes.

If you buy the property as your Permanent Residence (Habilitação Própria e Permanente), you are exempt from paying IMI for 3 years, provided:

1. The VPT is under €125,000.

2. Your household taxable income is under €153,300.

Note: This usually applies to smaller apartments or renovation projects. Luxury villas rarely qualify because their VPT is too high.

3. The “Millionaire Tax” (AIMI)

If you are buying high-end real estate, watch out for the Adicional IMI (AIMI).

This applies if the total sum of your VPTs exceeds €600,000 (or €1.2 Million for a married couple).

• The Rate: 0.7% on the amount above the threshold.

• The Trap: If you buy through a “White Listed Company” (Delaware LLC, etc.), you pay 0.4% on the total value with no allowance. This is why we rarely recommend buying residential homes through corporate structures anymore.

4. When Do You Pay? (The 2026 Calendar)

You don’t pay at the time of purchase. You pay the following year.

• Bill < €100: Paid in 1 installment (May).

• Bill > €100 but < €500: Paid in 2 installments (May, November).

• Bill > €500: Paid in 3 installments (May, August, November).

📉 Want to Lower Your Tax Bill?

One of the first things I do for clients buying older properties is request a VPT Re-evaluation. Sometimes, the Tax Office has outdated math that is costing you hundreds of Euros a year.

• Buying a Property? Download our Ultimate Portugal Real Estate Buyers Guide to see the full list of taxes (IMT, Stamp Duty, IMI).

• Need a Simulation? Send me the listing you are interested in, and I will estimate the running costs for you.

Contact Ferdi for a Tax Simulation:

📧 Email: ferdi@immolusitania.ch

📅 Book a Call: Click here to Schedule on Calendly