Cap rate, short for capitalization rate, measures a property's net operating income as a percentage of its market value. In 2026, Portugal's average gross rental yield is 4.29% according to Global Property Guide, but net operating yield is usually lower after vacancy, maintenance, condominium fees, insurance, and IMI.
What is cap rate?
Cap rate is the annual operating return of a property before mortgage payments. A 5% cap rate means the property generates €5 of net operating income for every €100 of property value.
This makes it useful for comparing different properties, zones, and cities. The financing structure may change from buyer to buyer, but the property-level operating return is the same.
What is the cap rate formula?
Portugal worked example
Assume a €280,000 apartment with €1,600 monthly rent. Gross yield is 6.86%, but the cap rate is lower after real costs.
| Line item | Value |
|---|---|
| Gross annual rent | €19,200 |
| Vacancy at 6% | −€1,152 |
| Condominium, IMI, insurance, maintenance | −€3,940 |
| NOI | €14,108 |
| Cap rate | 5.04% |
The gap between gross yield and cap rate is where weak deals hide. If a listing advertises 7% yield but the true cap rate is 4.5%, the investor is buying less income than the headline suggests.
What is a good cap rate in Portugal?
In 2026, Global Property Guide reports Lisbon average gross yields at 3.76%, Porto at 3.96%, Braga at 4.47%, and Setubal at 4.89%. Net cap rates are normally lower than those gross figures.
Compare deals quickly: use the cap rate calculator to turn rent, price, vacancy, and costs into a clean operating yield.
Sources
- Global Property Guide, Portugal Rental Yields, retrieved 2026-06-19, https://www.globalpropertyguide.com/europe/portugal/rental-yields