Letting Your Spanish Property to Friends and Family: Tax and Legal Implications

The Hidden Tax Trap

You own a lovely apartment on the Costa del Sol. Your friends ask to use it for a week in July. Your sister wants to come for Christmas. You are happy to let them stay — perhaps for free, perhaps for a token amount to cover utilities. What could go wrong?

Quite a lot, from a tax perspective. Spanish tax law is unforgiving when it comes to the private use and below-market letting of properties. The Hacienda (Spanish tax authority) treats every day your property is not generating market-rate rental income as a taxable event — whether you are using it yourself, lending it to friends, or leaving it empty.

This guide explains the rules, the risks, and how to stay compliant while still enjoying your property and sharing it with people you care about.

Deemed Income Tax on Empty or Self-Used Periods

Under Spanish tax law (IRNR — Impuesto sobre la Renta de No Residentes), non-resident property owners are taxed on "deemed income" for every day the property is not rented at market rate. This applies whether the property is empty, used by you personally, or occupied by friends and family paying below-market rent.

How It Is Calculated

• Tax base: 2% of the cadastral value of the property (or 1.1% if the cadastral value was revised in the last 10 years)
• Tax rate: 24% for non-EU residents (which includes UK nationals post-Brexit)
• Pro-rated: the deemed income applies proportionally to the number of days the property is not rented at market rate

Example: Your apartment has a cadastral value of €150,000 (revised within the last 10 years). You rent it to tourists for 120 days and use it yourself or leave it empty for 245 days.

Calculation	Amount
Deemed income base: €150,000 x 1.1%	€1,650
Pro-rated for 245 non-rented days: €1,650 x (245/365)	€1,107
Tax at 24%	€266

This €266 is owed regardless of whether you spent those 245 days in the property yourself, lent it to friends, or left it completely empty with the shutters closed. The Hacienda does not care — if it is not generating market-rate rent, you owe deemed income tax.

Below-Market Rent: What Hacienda Thinks

If you charge your friends €200 per week for a property that would fetch €800 per week on the open market, the Hacienda's position is clear: you are not generating market-rate income. The consequence:

• The below-market rental period is treated as "own use" for deemed income purposes
• You must still declare the below-market rent as income and pay the 24% IRNR on it
• AND you must also pay the deemed income tax for that period (calculated on cadastral value), to the extent the actual rent is below the deemed income amount

In practice, if you charge a token amount that is lower than the deemed income calculation, you pay tax on the deemed income amount. If you charge more than the deemed income amount but less than market rate, you pay tax on the actual rent received. If you charge market rate, you pay tax on the market rent and no deemed income applies.

Free Use by Friends and Family

Letting friends or family stay for free is treated identically to leaving the property empty — you owe deemed income tax for those days. There is no exemption for goodwill or family generosity.

Modelo 210: The Filing Obligation

Non-resident property owners must file Modelo 210 to declare both rental income and deemed income. The filing requirements:

• Rental income: file within the quarter following receipt of income (quarterly deadlines: 1-20 April, 1-20 July, 1-20 October, 1-20 January)
• Deemed income (own-use/empty periods): file annually by 31 December of the following year
• Filing method: online through the Agencia Tributaria website, or through a gestor/tax advisor

Many UK property owners are unaware of the deemed income filing obligation and only declare rental income. This is non-compliant. If the Hacienda audits you (and they are increasingly active in checking non-resident property tax filings), you face:

• Back taxes for up to 4 years of unfiled deemed income
• Interest on late payments
• Surcharges of 5-20% depending on how late the filing is
• Penalties of 50-150% of the undeclared tax in serious cases

Keeping Proper Records

To stay compliant and prove your rental income to the Hacienda if questioned, maintain detailed records:

• A calendar showing every day of the year and how the property was used: rented (to whom, at what rate), own use, friend/family use, or empty
• Rental contracts or booking confirmations for all paid stays, even informal ones with friends
• Bank statements showing rent received — do not accept cash without a record
• Utility bills and key handover records that corroborate the usage calendar
• Receipts for maintenance and management costs (deductible for EU residents but not for UK post-Brexit non-residents)

Insurance Implications

Letting friends and family use your property creates insurance complications that most owners overlook:

Building and Contents Insurance

• Standard home insurance in Spain typically covers owner occupation and short-term guest stays
• If you rent to tourists (even informally), you need a specific rental property endorsement or a landlord insurance policy. Many standard policies exclude damage caused by paying guests
• Below-market or free stays fall into a grey area — check your policy wording carefully. Some insurers treat any non-owner occupation as "rental" and require disclosure

Liability Insurance

• If a friend slips on your wet terrace and breaks their hip, who pays? In Spain, the property owner bears responsibility for the safety of their property
• Standard home insurance usually includes third-party liability cover, but verify the amount (€150,000 minimum is recommended, €300,000 is better)
• If you are renting (even informally), some policies require you to have a separate public liability policy

Community Insurance

• The community of owners will have building insurance, but this covers the structure — not your contents or your liability to guests
• Some communities require owners to carry individual insurance. Check your community statutes

Utility Arrangements When Friends Stay

Practical considerations that can create tax and relationship complications:

• Electricity: Spanish electricity contracts have a fixed component (potencia contratada) plus variable consumption. If friends use significant air conditioning in summer, the bill can be substantial (€150-€300/month). Decide in advance who pays
• Water: less expensive but significant if they fill or top up the pool
• Internet: typically a flat monthly fee, so no additional cost
• Gas: bottled gas (bombona) for cooking costs approximately €15-€20 per canister

Tax tip: If you charge friends for utilities only (no rent), this is still treated as free occupation for deemed income tax purposes. The utility reimbursement is not "rent" in the Hacienda's eyes.

Avoiding Tax Traps: Practical Strategies

1. Charge market rate and declare it. The simplest compliant approach. Your friends pay the going rate, you declare it on Modelo 210, and everyone is clear. This may feel awkward, but it is the cleanest tax position
2. Accept that free/discounted use triggers deemed income tax. If you choose to let friends stay free or at a discount, accept that you owe deemed income tax for those days and file accordingly. The amount is usually modest (€1-€3 per day for a typical Costa del Sol apartment)
3. Keep impeccable records. A clear calendar and supporting documents make filing straightforward and protect you in an audit
4. Use a Spanish tax advisor (gestor fiscal). Annual cost: €200-€400 for non-resident tax compliance. This is money well spent — they handle Modelo 210 filings, calculate deemed income correctly, and ensure you do not miss deadlines
5. Ensure your insurance covers non-owner occupation. Disclose to your insurer that friends and family use the property. The premium increase is typically minimal (5-15%), but the consequences of non-disclosure can be catastrophic

Declaring Income Correctly: A Quick Reference

Scenario	Tax Treatment	Filing
Rented at market rate to tourists/tenants	24% tax on gross rental income (no deductions for non-EU residents)	Modelo 210, quarterly
Below-market rent to friends/family	24% on higher of: actual rent or deemed income	Modelo 210, quarterly (rent) + annual (deemed)
Free use by friends/family	24% on deemed income (1.1-2% of cadastral value, pro-rated)	Modelo 210, annual
Empty / not used at all	24% on deemed income (same as above)	Modelo 210, annual
Personal use by owner	24% on deemed income (same as above)	Modelo 210, annual

The Bottom Line

Sharing your Spanish property with friends and family is one of the joys of ownership. Do not let tax anxiety stop you. But do understand the rules, keep records, file your Modelo 210 correctly, and ensure your insurance covers non-owner use.

The deemed income tax on non-rented periods is typically modest — often less than €300-€500 per year for a standard Costa del Sol apartment. The penalty for not declaring it is disproportionately large. Compliance is cheap; non-compliance is expensive.

For comprehensive guidance on Spanish property tax obligations, read our rental income tax guide. To connect with English-speaking tax advisors on the Costa del Sol, join the MUNDO Buyer Club.