When you rent out a property, the question of financial protection is unavoidable: what do you do if the tenant stops paying? There are three main protection mechanisms available in Portugal, and each has different advantages, limitations and costs.
The essentials in 30 seconds
- Guarantor (fiador): no cost, but hard to enforce in court and dependent on a third party's financial situation.
- Security deposit (caução): covers only 1 to 2 months (the legal maximum), which is not enough for an eviction that takes 6 to 12 months.
- Rent insurance: pays the missing rent within the limits of the policy, with a premium paid by the landlord and a structured claims process.
- The ideal combination is deposit (for damage) + rent insurance (for non-payment): they are complementary.
This article compares the three objectively, to help you choose the one that best suits your situation.
How the Guarantor Works
A guarantor (fiador) is a third party (usually a relative or friend of the tenant) who commits by contract to pay the rent if the tenant does not. It is one of the oldest and most common forms of guarantee in Portugal.
Advantages:
- No direct cost to the landlord
- Can cover the whole period of non-payment (no time limit)
- Legally binding if properly formalised in the lease
Limitations:
- The guarantor may not have the means to pay when needed
- The guarantor’s financial situation may change over time
- Enforcing the guarantee requires a court action, a slow and expensive process
- Many prospective tenants do not have a guarantor available, which limits the market
- The guarantor may contest the debt and prolong the process
How the Security Deposit Works
The security deposit (caução) is a sum paid by the tenant at move-in, usually equal to 1 or 2 months’ rent, which the landlord can keep in case of non-payment or damage at the end of the lease.
Advantages:
- Available immediately, with no need for a court action for small debts
- No cost to the landlord
- Can cover damage to the property as well as non-payment
Limitations:
- Covers only 1 to 2 months’ rent, very little compared with an eviction process of 6 to 12 months
- The tenant may claim the deposit back even when there is non-payment
- No legal or eviction cover included
- The legal maximum amount is 2 months’ rent (NRAU)
How Rent Insurance Works
Rent insurance is an insurance contract paid for by the landlord that guarantees receipt of the rent regardless of the tenant’s behaviour.
Advantages:
- Covers unpaid rent for the period set in the policy
- Some policies include legal cover and handling of the special eviction procedure (PED, Procedimento Especial de Despejo)
- Payment under the terms of the policy, with no dependence on a third party’s financial situation
- Structured, predictable claims process
- Reduces the landlord’s stress and uncertainty
Limitations:
- Has an annual premium paid by the landlord, set by the insurer
- May have a waiting period after the policy is taken out
- Requires a solvency analysis of the tenant: not everyone is approved
- Does not cover damage to the property in basic policies (additional cover available)
Comparison: Cost, Cover, Convenience
Cost to the landlord:
- Deposit: none
- Guarantor: none
- Rent insurance: annual premium, set by the insurer
Months of rent covered:
- Deposit: 1 to 2 months
- Guarantor: unlimited (in theory), hard to enforce
- Rent insurance: according to the policy limit
Speed of collection:
- Deposit: immediate (if there is no dispute)
- Guarantor: months (court action)
- Rent insurance: depends on the payment deadline set in the policy
Legal/eviction cover:
- Deposit: none
- Guarantor: none (the landlord bears the costs)
- Rent insurance: included in some policies
Decision Matrix: Which Is the Best Option for You?
Choose the deposit if:
- The tenant is very low risk (a relative, a public-sector employee, a long previous relationship)
- The rent is low and the financial risk is tolerable
Choose the guarantor if:
- The tenant has variable income but a solvent relative available to act as guarantor
- You do not want to incur insurance costs
- You accept the risk of having to enforce the guarantee in court
Consider rent insurance if:
- You want real protection without depending on a third party’s financial situation
- The rent is significant compared with your expenses
- You have several rental properties and want to manage risk systematically
- You are a landlord living abroad (expat, non-resident) and cannot follow the process closely




