It is fair to say that there is little (if any) downside to generating extra income except, of course, the obvious disadvantage that your property is not available to you and to your family and friends 100% of the time. If you are considering renting then there are a number of issues that you need to be aware of in order to avoid any problems with the Portuguese licensing and tax departments.
The Decreto-Lei n.º39/2008 of 7 March and Portaria 517/2008 25 June states that properties which are rented out, but not licensed as a touristic development, require a Rental Licence. This license is available from the local council (Câmara) which has a number of requirements that need to be complied with but none of which are unduly onerous. The reasoning behind the licensing is to ensure the quality of accommodation for visitors to Portugal meets proper and acceptable safety and hygiene standards. The law has been enforced quite vigorously to date with ASEA (the overseeing body) carrying out spot-checks on rental agents to ensure that all properties that they have available for rent are properly licensed. With so many properties advertised on the Internet for holiday rental it is also an easy task for ASEA to review holiday rental sites to determine properties that are being rented that may not be registered with them.
These are issued, as stated previously, by the local Câmara and we would advise that you instruct your lawyer or property manager to arrange obtaining the proper license for you. You will need to provide the following papers (may be some small variations from Câmara to Câmara):
If the property is located in Portugal then Portuguese tax has to be paid on any income generated by the property. This applies even if the owner and the renter are based outside Portugal and if the rental is arranged without the assistance of a Portuguese-based agent.
The property owner is legally obliged to file an income tax return declaring the rental achieved during the year. Many expenses can be deducted from the gross income to arrive at the net taxable figure and these include:
The tax payable has just been increased to 25% for companies and to 28% for individuals. The owner should declare the tax paid in his country of tax residence and he will be given credit for this in the payment of any income tax there.
If the property is being used for holiday rentals then it is possible to have the property designation at the local tax office changed from 'Habitation' to 'Services' and this usually results in a significant reduction in the Valor Patrimonial (Rateable value) of the property with a resultant reduction in the annual IMI payable on the property. This change can be particularly effective in having the value reduced below the € 1 million threshold for the new tax on properties over that figure